Key information

Title
Drilling assembly for removal of an obstacle in a conduit
Application number
20220208
Case type
National
Status
27.10.2025 Innsigelse innkommet og under behandling
Filed
15.02.2022
Priority
22.02.2021 NO 20210227
Effective date
15.02.2022
Publicly available
23.08.2022
Next annual fee due
28.02.2027
Applicant
Altus Intervention (Technologies) AS (NO)
Owner
Altus Intervention (Technologies) AS (NO)
Inventor
Kristine Falk Gabrielsen (NO) et al.
Agent
HÅMSØ PATENTBYRÅ AS (NO)
Granted
27.10.2025
Patent number
349176
Expiry date
15.02.2042

Abstract and drawing

Disclaimer: This text has been machine-scanned and may contain errors – please refer to "Publications" for legally binding content.
A drilling assembly (1) for making a passage in an object (2) within a petroleum well (8). The drilling assembly (1) comprises a drill bit assembly (3), a cutting assembly (4), and both assemblies (3, 4) are fastened to a rotatable drive assembly (5), - the drill bit assembly (3) comprises a drill bit (31); - the cutting assembly (4) comprises a hole saw assembly (42); - the cutting assembly (4) is resiliently displaceable to the drill bit assembly (3). The drilling assembly (1) comprises a displaceable membrane (6) within the tubular body (41). The membrane (6) divides an interior (43) of the tubular body (41) in a receiving compartment (69) and an inner compartment (60).

Publications

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Documents

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Date
 Date Doc. No. Process Case number In/Out Journal description To/from
 20.05.2026 03-01 Innsigelse 2026/00217 UT Bekreftelse til kravstiller/innsiger ACAPO ONSAGERS AS
 20.05.2026 02-07 Innsigelse 2026/00217 UT OP1547NO00-innsigelse
20.05.2026 02-06 Innsigelse 2026/00217 UT D9-US1968282_A
20.05.2026 02-05 Innsigelse 2026/00217 UT D8-US1777581_A
20.05.2026 02-04 Innsigelse 2026/00217 UT D7 - US_7967535_B2
20.05.2026 02-03 Innsigelse 2026/00217 UT D6 - WO_2008104179_A2
20.05.2026 02-02 Innsigelse 2026/00217 UT D5-NO341673B1(2017)
20.05.2026 02-01 Innsigelse 2026/00217 UT Oversendelse til patenthaver HÅMSØ PATENTBYRÅ AS
 18.05.2026 01-08 Innsigelse 2026/00217 INN OP1547NO00-innsigelse ACAPO ONSAGERS AS
 18.05.2026 01-07 Innsigelse 2026/00217 INN Fullmakt_innsigelse mot NO348988 ACAPO ONSAGERS AS
 18.05.2026 01-06 Innsigelse 2026/00217 INN D9-US1968282_A ACAPO ONSAGERS AS
 18.05.2026 01-05 Innsigelse 2026/00217 INN D8-US1777581_A ACAPO ONSAGERS AS
 18.05.2026 01-04 Innsigelse 2026/00217 INN D7 - US_7967535_B2 ACAPO ONSAGERS AS
 18.05.2026 01-03 Innsigelse 2026/00217 INN D6 - WO_2008104179_A2 ACAPO ONSAGERS AS
 18.05.2026 01-02 Innsigelse 2026/00217 INN D5-NO341673B1(2017) ACAPO ONSAGERS AS
 18.05.2026 01-01 Innsigelse 2026/00217 INN Nytt overprøvningskrav (OP) ACAPO ONSAGERS AS
 31.10.2025 18-01 Saksbehandling 20220208(349176) UT PT Registreringsbrev nasjonal patent (15) (PT20220208)
01.08.2025 17-01 Saksbehandling 20220208 UT PT Meddelelse om patent HÅMSØ PATENTBYRÅ AS
 06.05.2025 16-05 Saksbehandling 20220208 INN P29798NO01_Response_Office_Action HÅMSØ PATENTBYRÅ AS
 06.05.2025 16-04 Saksbehandling 20220208 INN P29798NO01 Oversatte krav HÅMSØ PATENTBYRÅ AS
 06.05.2025 16-03 Saksbehandling 20220208 INN P29798NO01 Description_and_claims_mark-up HÅMSØ PATENTBYRÅ AS
 06.05.2025 16-02 Saksbehandling 20220208 INN P29798NO01 Description_and_claims print-ready HÅMSØ PATENTBYRÅ AS
 06.05.2025 16-01 Saksbehandling 20220208 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 10.02.2025 15-01 Saksbehandling 20220208 UT Substantive examination HÅMSØ PATENTBYRÅ AS
 04.12.2024 14-04 Saksbehandling 20220208 INN P29798NO01_Response_Office_Action HÅMSØ PATENTBYRÅ AS
 04.12.2024 14-03 Saksbehandling 20220208 INN P29798NO01 Amended_claims_Mark-up HÅMSØ PATENTBYRÅ AS
 04.12.2024 14-02 Saksbehandling 20220208 INN P29798NO01 Amended_claims HÅMSØ PATENTBYRÅ AS
 04.12.2024 14-01 Saksbehandling 20220208 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 05.09.2024 13-01 Saksbehandling 20220208 UT Realitet patent HÅMSØ PATENTBYRÅ AS
 11.06.2024 12-03 Saksbehandling 20220208 INN P29798NO01_Response_Office_Action HÅMSØ PATENTBYRÅ AS
 11.06.2024 12-02 Saksbehandling 20220208 INN P29798NO01 Sheets 1-13 HÅMSØ PATENTBYRÅ AS
 11.06.2024 12-01 Saksbehandling 20220208 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 11.03.2024 11-01 Saksbehandling 20220208 UT Substantive examination HÅMSØ PATENTBYRÅ AS
 04.01.2024 10-01 Saksbehandling 20220208 UT PT Varsel om betaling av første årsavgift (3317) (PT20220208) HÅMSØ PATENTBYRÅ AS
 03.01.2024 09-05 Saksbehandling 20220208 INN P29798NO01_Response_Office_Action HÅMSØ PATENTBYRÅ AS
 03.01.2024 09-04 Saksbehandling 20220208 INN P29798NO01_Engelsk saksbehandling HÅMSØ PATENTBYRÅ AS
 03.01.2024 09-03 Saksbehandling 20220208 INN P29798NO01 Amended_claims_Mark-up HÅMSØ PATENTBYRÅ AS
 03.01.2024 09-02 Saksbehandling 20220208 INN P29798NO01 Amended_claims HÅMSØ PATENTBYRÅ AS
 03.01.2024 09-01 Saksbehandling 20220208 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 03.10.2023 08-01 Saksbehandling 20220208 UT Realitet patent HÅMSØ PATENTBYRÅ AS
 04.07.2023 07-04 Saksbehandling 20220208 INN P29798NO01_Svar_Patentstyrets_uttalelse HÅMSØ PATENTBYRÅ AS
 04.07.2023 07-03 Saksbehandling 20220208 INN P29798NO01 Amended_claims_mark-up HÅMSØ PATENTBYRÅ AS
 04.07.2023 07-02 Saksbehandling 20220208 INN P29798NO01 Amended_claims HÅMSØ PATENTBYRÅ AS
 04.07.2023 07-01 Saksbehandling 20220208 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 15.05.2023 06-01 Saksbehandling 20220208 UT PT Bekreftelse på fristutsettelse HÅMSØ PATENTBYRÅ AS
 15.03.2023 05-01 Saksbehandling 20220208 UT PT Bekreftelse på fristutsettelse HÅMSØ PATENTBYRÅ AS
 16.09.2022 04-02 Saksbehandling 20220208 UT PT report 08:53:37
16.09.2022 04-01 Saksbehandling 20220208 UT 20220208_1618559_PT 08 HÅMSØ PATENTBYRÅ AS
 17.02.2022 03-02 Saksbehandling 20220208 INN PDF_475818554 HÅMSØ PATENTBYRÅ AS
 17.02.2022 03-01 Saksbehandling 20220208 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 17.02.2022 02-01 Saksbehandling 20220208 UT Infobrev til oppfinner HÅMSØ PATENTBYRÅ AS
 15.02.2022 01-04 Saksbehandling 20220208 INN P29798NO01 Signert generalfullmakt HÅMSØ PATENTBYRÅ AS
 15.02.2022 01-03 Saksbehandling 20220208 INN P29798NO01 Hole saw Sheet 1-13 HÅMSØ PATENTBYRÅ AS
 15.02.2022 01-02 Saksbehandling 20220208 INN P29798NO01 Description_and_claims HÅMSØ PATENTBYRÅ AS
 15.02.2022 01-01 Saksbehandling 20220208 INN Søknadsskjema Patent HÅMSØ PATENTBYRÅ AS

Description, claims and drawings

Disclaimer: This text has been machine-scanned and may contain errors – please refer to "Publications" for legally binding content. Description
3491761DRILLING ASSEMBLY FOR REMOVAL OF AN OBSTACLE IN A CONDUITThis invention concerns a drilling assembly for removal of an obstacle in a conduit. The obstacle may be a top cap or a valve and the conduit may be a well tube in a petroleum well, and in particular a production tubing in a petroleum well. More particularly the drill- 5 ing assembly comprises a drill bit and a hole saw. Even more particularly the (hole saw) core drill is resiliently and axially displaceable to the drill bit. During operation a full weight on the drilling assembly is first on the drill bit and thereafter seamlessly and without a damaging hard approach transferred to the (hole saw) core drill when the drill bit penetrates the obstacle. The obstacle is drilled and cut away and a cut out disc is securely 10 retrieved within the drilling assembly and brought to the surface together with the drilling assembly.A completed petroleum well comprises valves in the production tubing. Such valves may be ball valves and flapper valves. On rare occasions such valves do not function properly. For example, due to corrosion, a closed valve does not reopen by ordinary means. Valves 15 that are out of order may be removed by drilling or cutting tools. As this is a rare event, equipment for removal of obstacles in the production tubing is by advantage light and easy to mobilize on a need basis. Equipment that is operated by wireline is a preferred choice.A petroleum well may be temporary abandoned. The petroleum well is temporary shut in 20 to make it possible to carry out e.g., modifications on surrounding structures. The well is reopened thereafter. Prior to the shut in, one so called deep barrier valve and one so called shallow barrier valve are installed in the well. After testing and approval of the valves, the x-mas tree is removed and replaced with a temporary top cap. The well pres 3491762sure below the top cap is monitored during the transition phase between shut in and reopening. In case a leakage through the installed barrier valves is detected, and a pressure builds up, the temporary top cap cannot be removed before a new pressure tight valve is installed in the well. Equipment to control the pressure is installed on the well, and then 5 access is made through the top cap.The obstacle, such as a valve or a temporary top cap, may be drilled away by using a drill bit. Drilling is a relative fast operation. However, drilling creates swarf, such as flutes of swarf. Drill bits with a large diameter produces more and larger swarf compared to drill bits of smaller diameter. Swarf are pieces of metal that may harm the operation of the 10 well. In general, free pieces of metal are unwanted in a petroleum well.Ball valves and flapper valves comprise curved surfaces. A drill bit without proper lateral support will slide on the curved surface until the first part of a hole is formed. This hole may not be aligned with the center line of the drilling tool, and the drilling operation may not be performed correctly as the hole is not centralized. This may harm or damage the 15 drill bit.An unprotected drill bit may be harmed or damaged on entering the well and during displacement through the well tube until the drill bit lands on the obstacle. An unprotected drill bit may also be harmed on withdrawal from the well.Efficient drilling requires proper weight on the drill bit. If the weight is too large, the drill 20 bit may break off. If the weight is too small, the drilling operation becomes very slow.It is also known to cut away obstacles in a well tubing. Patent application WO2017/097832 discloses a mill head with a centre opening. The milling action is therefore faster and requires less energy as not all material is removed by milling. The centre opening will create a piece of metal that may drop into the well on penetration through 25 the obstacle.It is also known to remove obstacles in a well tubing using a tool with a centre drill bit and a hole saw. Patent applications WO2008/104179 and US2018179845 disclose tools of this kind. Obstacles are removed faster by a centre drill bit and a hole saw compared to using 3491763a mill head with a centre opening. The hole saw produces a metal disc, and the tool is provided with means for capturing and securing the metal disc on penetration through the obstacle. If the capturing means fail, the disc will drop into the well tubing. The disc may drop into the well immediately after penetration through the obstacle or during the 5 withdrawal from the well. A lost disc must be removed and additional runs into the well with appropriate equipment are needed. This is costly and complicates the operation. The invention has for its object to remedy or to reduce at least one of the drawbacks of the prior art, or at least provide a useful alternative to prior art.The object is achieved through features, which are specified in the description below and 10 in the claims that follow.The invention is defined by the independent patent claims. The dependent claims define advantageous embodiments of the invention.In a first aspect the invention relates more particularly to a drilling assembly for making a passage in an object within a petroleum well. The drilling assembly is adapted to be dis- 15 placed by a wireline tractor and supplied with a rotational force from a rotational motor.The drilling assembly comprises a drill bit assembly, a cutting assembly, and a rotatable drive assembly:- the drilling assembly forms a longitudinal center axis;- the drill bit assembly being fastened to the rotatable drive assembly;20 - the drill bit assembly comprises a drill bit at a free end of the drill bit assembly;- the rotatable drive assembly comprising a slidable house comprising a central channel;- the cutting assembly is formed by a tubular body having a mouth portion provided with a hole saw assembly and the cutting assembly being fastened to the slidable 25 house at a proximal end portion; and- the drill bit assembly being positioned within said cutting assembly.The cutting assembly is rotationally stiff and resiliently displaceable relative to the drill bit assembly and the drive assembly along the center axis. The drilling assembly comprises a displaceable membrane within the tubular body, the membrane is oriented per- 30 pendicular to the longitudinal center axis, the membrane comprises a central hole, the membrane is fastened to one of the rotatable drive assembly and the drill bit assembly. 3491764The membrane divides an interior of the tubular body into a receiving compartment of variable volume and an inner compartment of variable volume.The membrane may be formed as a disc. The membrane may be fluid tight. The membrane’s circumference may abut partly an inner wall of the tubular body such that the 5 membrane does not act as a seal. The membrane may have a diameter that is substantially equal to the inner diameter of the tubular body, but with a small clearance such that the membrane does not act as a seal.In an initial position the drill bit may in one embodiment be fully surrounded by the cutting assembly. In an alternative embodiment, the drill bit may be projecting be-10 yond the cutting assembly along the center axis when the drill bit is in the initial position.The drill bit assembly may comprise a catcher at a distal portion of the drill bit assembly. The drill bit assembly may comprise a retainer at a middle portion. The retainer may comprise a first retainer and a second retainer, and the first retainer and the second re- 15 tainer may be spaced apart along the drill bit assembly.The drill bit assembly may comprise a displaceable sleeve adapted to slide along a surface of the drill bit assembly. The displaceable sleeve may have a distal end portion and a proximal end portion. The displaceable sleeve may be formed with an internal chamfer at the proximal end portion. In one embodiment the displaceable sleeve may be provided 20 with a spacer, and the spacer may be adapted to abut an internal face of the tubular body. The spacer may be provided with a slide bearing that may abut the internal face. The spacer and the sleeve support the drill bit assembly such that the drill bit is rotating around the centre axis.The rotatable drive assembly may have a proximal end and a distal end, the drilling 25 assembly may comprise:- an adapter;- a drive shaft having a distal end and a proximal end, the drive shaft being connected to the adapter at the proximal end and to the drill bit assembly at the distal end, said drive shaft being formed with a polygonal cross-section at a proximal end portion of 30 the drive shaft;- a slidable house comprising a central channel and provided with an external circular 3491765distal end connected to the cutting assembly;- a spring encircling the drive shaft between the adapter and the slidable house, and the drive shaft is formed with an enlarged diameter at the distal portion, said enlarged diameter forms a stop face.5 The slidable house may be provided with an insert with a central guide formed with a polygonal cross section adapted for receiving the drive shaft.In one embodiment the house may be provided with at least one radially oriented springloaded bolt, and the drive shaft may be provided with at least one recess, said recess may be formed with a sloping proximal end portion and a distal shoulder, and said recess may 10 be adapted to receive the spring-loaded bolt.In a second aspect the invention relates more particularly to a method for drilling a passage in an object within a petroleum well. The method comprises to:- provide a drilling assembly as described above and connect the drilling assembly to a wireline tractor; 15 - displace the drilling assembly within the petroleum well by the wireline tractor and position the drilling assembly in contact with the object;- engage the rotatable drive assembly and add weight on the drill bit assembly such hat the spring becomes partly compressed;- make a through hole in the object by the drill bit; 20 - add further weight on the cutting assembly such that the spring becomes further compressed and cut out at least one disc from the object; and- displace the cutting assembly forwardly and relative to the membrane by the biasing force of the compressed spring,thereby fluid in the inner compartment is evacuated proximally along the drive shaft and 25 a distance between the membrane and the disc is kept constant by a sub-pressure in the receiving compartment, and thereby the disc follows the membrane in the proximal direction into the receiving compartment.Fluid in the inner compartment is evacuated proximally along the drive shaft through the central guide of the insert and a central channel of the slidable house. 3491766The method may comprise to provide the drilling assembly with a displaceable sleeve prior to guiding the drilling assembly into the petroleum well, and the sleeve may be positioned on the drill bit assembly to cover the catcher and keep the catcher in a flush state with a surface of the drill bit assembly. The method may comprise to guide the catcher 5 into the through hole in the flush state by abutting the sleeve’s distal end portion with the object and displace the sleeve proximally along the drill bit assembly when the drill bit assembly drills through the object. The method may comprise to guide the sleeve over the retainer to squeeze the retainer into a flush state with the surface of the drill bit assembly. The method may comprise to guide the retainer into the through hole in the flush 10 state by abutting the sleeve’s distal end portion with the object and displace the sleeve proximally along the drill bit assembly when the drill bit assembly is displaced distally relative to the object.The method may comprise to keep the retainer positioned within the through hole when the disc is retrieved from the well. The method may comprise to cut two discs from a ball 15 valve and keep the catcher positioned within the second through hole of the distal disc when the discs are retrieved from the well.In the following is described examples of preferred embodiments illustrated in the accompanying drawings, wherein:Figs. 1-6 show in sequence how a drilling assembly according to the invention is 20 positioned within a riser and makes a through hole in a top cap and secures a disc;Figs. 7-15 show in sequence how the drilling assembly makes a through hole in a ball valve within a production tubing and secures two discs;Fig.16 shows the drilling assembly in an embodiment where a central bit assem- 25 bly is provided with a lateral support;Fig.17-26 show in sequence how the drilling assembly in an alternative embodiment makes a through hole in a ball valve within a production tubing and secures two discs; and 3491767Fig.27 show the drilling assembly shown in figures 17 to 26, where the outermost disc is secured by a catcher.In the drawings, the reference numeral 1 indicates a drilling assembly according to the invention. Some reference numerals appear in a limited number of the drawings and 5 are omitted in other drawings for clarity.The drilling assembly 1 is adapted to make a passage 21 in an object 2 within a petroleum well 8. The object may be a top cap 23 and the drilling assembly 1 is positioned within a riser 81 as shown in figures 1 to 6. The object may be a ball valve 25 and the drilling assembly 1 is positioned within a production tubing as shown in figures 7 to 27. The object 10 may be a flapper valve (not shown).The drilling assembly 1 comprises a central drill bit assembly 3, a cutting assembly 4, and a rotatable drive assembly 5. The drilling assembly 1 forms a longitudinal centre axis 9. The drilling assembly 1 is connected to a rotational motor (not shown) at a proximal end 10. The drill bit assembly 3 and the cutting assembly 4 is fastened to the rotatable drive 15 assembly 5. The drill bit assembly 3 comprises at a free end 39 a drill bit 31. The cutting assembly 4 is formed by a tubular body 41. The tubular body 41 is at a mouth portion 49 provided with a hole saw assembly 42.The drilling assembly 1 is shown in an initial position in figures 1, 7, 16, and 17. The drill bit 31 is shown fully surrounded by the cutting assembly 4. In an alternative embodi-20 ment, the drill bit 31 may be projecting beyond the cutting assembly 4 along the center axis 9 when the drilling assembly 1 is in the initial position (not shown).The drilling assembly 1 comprises a displaceable membrane 6 within the tubular body 41. The membrane 6 divides an interior 43 of the tubular body 41 in an inner compartment 60 and a receiving compartment 69. The inner compartment 60 varies in volume accord- 25 ing to the position of the membrane 6. Likewise, the receiving compartment 69 varies in volume according to the position of the membrane 6.The rotatable drive assembly 5 comprises from a proximal end 50 towards a distal end 59 an adapter 51, a drive shaft 52, and a slidable house 53. A spring 54 is encircling the drive shaft 52 between the adapter 51 and the slidable house 53. 3491768The adapter 51 is at a proximal end 510 shown provided with interior threads 511 in a recess 513. The adapter 51 is connected to a rotatable drive system (not shown) of a wireline tractor or the like. The adapter 51 is at a distal end 519 provided with internal threads 517 in a recess 518. The drive shaft 52 is at a proximal end 520 threadly con-5 nected to the adapter 51. The drive shaft 52 comprises at a distal end 529 internal threads 527 in a recess 528. The drill bit assembly 3 is at a proximal end 30 connected to the drive shaft 52. In the drawings the drill bit assembly 3 is shown threadly connected to the drive shaft 52.The drill bit assembly 3 comprises an extended holder 35. The extended holder 35 is 10 at a proximal end 350 shown threadly connected to the drive shaft 52. The extended holder 35 is at a distal end 359 connected to the drill bit 31 (see figure 2).The slidable house 53 comprises at a proximal end 530 a neck portion 531 and at a distal end 539 a head portion 532. The head portion 532 is provided with a distal entrance 533 at the distal end 539. The entrance 533 is shown forming an internal 15 shoulder 534. The drive shaft 52 is at the distal end 529 formed with an enlarged diameter, and a shoulder 525 faces the proximal end 10 (see figure 2). The shoulder 525 abuts a stop face 566 when no weight is put on the drive assembly 5 as shown in e.g. figure 1.In one embodiment the slidable house 53 is provided with at least one spring loaded 20 bolt 55 in a radial bore 550. The drive shaft 52 is on a surface 58 provided with at least one recess 57 formed with a sloping proximal end portion 570 and an opposite shoulder 579. The recess 57 is adapted to receive the spring-loaded bolt 55 (see figures 3, 5 and 6).The drive shaft 52 is shown formed with a polygonal cross section. The slidable house 25 53 is formed with a central channel 536 from the proximal end 530 to the entrance 533. The central channel 536 is formed with a circular cross section. An insert 56 is positioned within the entrance 533. The insert 56 is formed with a central guide 561 formed with a polygonal cross section adapted for receiving the drive shaft 52. The insert 56 is rotational stiff connected to the slidable house 53 by pins 563. A rotational 30 force on the drive shaft 52 is transferred to the slidable house 53 through the insert 56 and the pins 563 (see figure 4 and 7). The insert 56 is axially locked by a retainer 565 shown as a circlip. In embodiments where the drilling assembly 1 is provided with spring loaded bolts 55, the insert 56 may be provided with corresponding bores as shown in figures 1-6. The insert 56 forms the stop face 566. 3491769In the description and figures, the drive shaft 52 is described as a drive shaft 52 with a polygonal cross-section. In other embodiments (not shown) the drive shaft 52 may be a spline or a shaft with a key. The insert 56 is in such embodiments formed with a central guide 561 adapted to the external profile of the drive shaft 52 such that a ro-5 tational force is transferred from the drive shaft 52 to the slidable house 53.The tubular body 41 is at a proximal end portion 410 fastened to an exterior surface of the head portion 532 of the slidable house 53. The tubular body 41 may in one embodiment be welded to the slidable house 53. The head portion 532 of the slidable house 53 may in one embodiment (not shown) be formed with a threaded circular 10 external surface. The tubular body 41 may comprise internal threads and threadly connected to the head portion 532.The membrane 6 is shown fastened to the distal end 529 of the drive shaft 52 by a membrane holder 61. The membrane 6 is formed as a disc with a central hole 63. The membrane 6 is positioned between the membrane holder 61 and a washer 65. The 15 membrane holder 61, membrane 6 and washer 65 are joined by a number of bolts 67 (see figure 6).The drill bit 31 is shown provided with a catcher 33. The catcher 33 is positioned in at least one catcher recess 331 (see figures 3, 4 and 7). The catcher 33 is resilient and protrudes from a surface 318 of the drill bit 31 when the catcher 33 is not tensioned.20 The extended holder 35 is shown with a retainer 34. The retainer 34 is positioned in at least one retainer recess 340 (see figure 4 and 7). The retainer 34 is resilient and protrudes from a surface 358 (see figure 7) of the extended holder 35 when the retainer 34 is not tensioned.A slidable sleeve 7 is initially positioned on the drill bit 31 as shown in figures 1 and 2, 25 and is during operation displaced to a position on the extended holder 35 as shown in e.g. figures 3 to 6. The sleeve 7 forms a proximal end portion 70 and a distal end portion 79 (see figure 5). The proximal end portion 70 is formed with an internal chamfer.Operation of the drilling assembly 1 is first described for drilling an opening in a top cap 23. The sequence is shown in figures 1 to 6. A raiser 81 connects the top cap 23 30 to the surface. The raiser 81 is filled with fluid at a pressure that equalize the pressure within the well as known in the art. The drilling assembly 1 is lowered within the raiser 81 by a e.g. wireline tractor (not shown) until the drilling assembly 1 lands on the top cap 23 as shown in figure 1. The landing is registered by a decrease in hanging weight. The drilling assembly 1 is withdrawn slightly and the drilling assembly 1 starts 34917610rotating. The drilling assembly 1 is displaced towards the top cap 23 until contact and weight on bit is increased. As the connection between the drill bit assembly 3 and the cutting assembly 4 is resilient due to the spring 54, weight on bit is transferred to the drill bit 31 which is axially displaced relative to the cutting assembly 4. The drill bit 31 5 starts to penetrate the surface of the top cap 23. The cutting assembly 4 is rotationally coupled to the drill bit 31 and rotates on the surface of the top cap 23 without penetrating substantially into the top cap 23 as weight on bit is on the drill bit 31 and only the spring 54 acts on the cutting assembly 4.The drill bit 31 makes a through hole 22 in the top cap 23 as shown in figure 2. When 10 the drill bit 31 breaks through the top cap 23, there is no axial resistance and the drill bit 31 is displaced to its maximum distal position relative to the cutting assembly 4 as shown in figure 3. The spring 54 is compressed and the weight on bit is transferred to the cutting assembly 4. During the displacement of the drill bit 31, the distal end portion 79 of the sleeve 7 abuts the surface of the top cap 23. The sleeve 7 has a larger 15 diameter than the drill bit 31. Thereby the sleeve 7 is axially displaced along the extended holder 35 towards the proximal end 359. The catcher 33 which from the start is retracted within the sleeve 7, enters the through hole 22 in the retracted mode as the inner diameter of the sleeve 7 equals the diameter of the through hole 22. Figure 3 shows the catcher 33 after the catcher 33 has been fully displaced through the top 20 cap 23. The catcher 33 enters the expanded mode after passage of the through hole 22. The proximal end portion 70 of the sleeve 7 forces the retainer 34 to enter a retracted mode when the chamfered proximal end portion 70 slides over the retainer 34.The cutting assembly 4 cuts out a disc 29 and creates a passage 21 in the top cap 23 as best seen in figure 6. Figure 4 shows when the cutting assembly 4 has penetrated 25 the top cap 23 and the disc 29 is within the receiving compartment 69. Due to that the weight on bit is on the cutting assembly 4, the drill bit assembly 3 is axially displaced at the same speed as the cutting assembly 4. This is seen by comparing figure 3 and figure 4. The extended holder 35 is thereby axially displaced relative to the top cap 23. The sleeve 7 is further displaced along the extended holder 35 towards the proxi-30 mal end 359. The retainer 34 which is retracted within the sleeve 7, enters the through hole 22 in the retracted mode as the inner diameter of the sleeve 7 equals the diameter of the through hole 22. The thickness of the top cap 23 is known and the axial position of the retainer 34 on the extended holder 35 is adapted to this. When the cutting assembly 4 breaks through the top cap 23, the retainer 34 is positioned 35 within the disc 29 as shown in figure 4. 34917611When the cutting assembly 4 breaks through the top cap 23 and forms the passage 21, there is no axial resistance to the drilling assembly 1. The drill bit assembly 3 is via the drive shaft 52 directly connected to the adapter 51. The adapter 51 is connected to the wireline tractor (not shown). Therefore, the drill bit assembly 3 will not be 5 axially displaced. The cutting assembly 4 will be displaced axially in the distal direction due to the compressed spring 54 which is released when there is no axial resistance to the cutting assembly 4. Thereby the cutting assembly 4 is displaced axially relative to the drill bit assembly 3 and the disc 29 as shown in figure 5. The length of the relative axially displacement of the cutting assembly 4 is determined by the position of the 10 recess 57. The spring-loaded bolt 55 slides along the surface 58 of the drive shaft 52 until the bolt 55 enters the recess 57 and abuts the shoulder 579. Thereby the cutting assembly 4 is locked relative to the drilling assembly 3 such that the hole saw assembly 42 remains in a proximal position relative to the free end 39 of the drill bit 31 as seen in figures 5 and 6. This arrangement secures that the disc 29 is not pushed in 15 the distal direction past the catcher 33 by the cutting assembly 4 when the cutting assembly 4 is forced towards the drill bit 31 by the spring 54. The catcher 33 is positioned within the mouth portion 49.The membrane 6 has a diameter that is close to the inner diameter of the tubular body 41, but with a small clearance to an inner wall 411 (see figure 7) such that the 20 membrane 6 does not act as a seal. The membrane holder 61 is shown fixed to the drive shaft 52. By comparison of figures 1 to 3, the distal displacement of the membrane 6 increases the volume of inner compartment 60 and decreases the volume of the receiving compartment 69. When the cutting assembly 4 breaks through the top cap 23, the membrane 6 is not displaced. The inner compartment 60 decreases in vol-25 ume and liquid in the inner compartment 60 is evacuated proximally along the drive shaft 52 through the central guide 561 of the insert 56 and the central channel 536. The receiving compartment 69 expands, which creates a sub-pressure in the receiving compartment 69. The disc 29 has a diameter that corresponds to the internal diameter of the tubular body 41 as a created thin circumferential burr 299 is folded inwards 30 when the whole disc 29 enters the receiving compartment 69. The pressure on the proximal side of the disc 29 is less than on the distal side, and this pressure difference ensures that the disc 29 stays within the tubular body 41 when the cutting assembly 4 is displaced distally relative to the drill bit 31.The thickness of the top cap 23 is known. The axial distance between the catcher 33 35 and the retainer 34 is adjusted to the thickness of the top cap 23. Thereby the retainer 34 is positioned within the disc 29 when the cutting assembly 4 breaks through the 34917612top cap 23 as seen in figure 4. The retainer 34 is adapted to be rotated within the disc 29 without losing the retaining capacity such that when the disc 29 is fully formed, the retainer 34 holds the disc 29, and the disc 29 rotates together with the cutting assembly 4.5 Break through of the top cap 23 is noticed by a controlling system (not shown) as a drop of torque and a drop of weight on bit on the drilling assembly 1. The wireline tractor and the drilling assembly 1 is then withdrawn from the top cap 23 as seen in figure 6. The disc 29 is shown secured within the tubular body 41 by the retainer 34. The catcher 33 is positioned at the distal side of the disc 29 but within the tubular 10 body 41. This safeguards the disc 29 from falling out of the tubular body 41 during the withdrawal of the drilling assembly 1 in the riser 81. In addition, if the disc 29 is displaced distally relative to the membrane 6, the pressure in the receiving compartment 69 on the proximal side of the disc 29 will drop, and the higher pressure on the distal side of the disc 29 will counteract the distal displacement. Together, these measures 15 will secure that the disc 29 does not fall out of the drilling assembly 1 during withdrawal.Operation of the drilling assembly 1 is further described for drilling an opening in a ball valve 25. The sequence is shown in figures 7 to 15 and 17 to 26. The ball valve 25 is located within a valve housing 85 which forms part of a production tube. The drilling 20 assembly 1 is lowered within the production tube and further within the valve housing 85 by a e.g. wireline tractor (not shown) until the drilling assembly 1 lands on the ball valve 25 as shown in figures 7 and 17. The landing is registered by a decrease in hanging weight or by an increased resistance to the propulsion of the wireline tractor. The drilling assembly 1 is withdrawn slightly and the drilling assembly 1 starts rotat-25 ing. The drilling assembly 1 is displaced towards the ball valve 25 until contact and weight on bit is increased. As the connection between the drill bit assembly 3 and the cutting assembly 4 is resilient due to the spring 54, weight on bit is transferred to the drill bit 31 which is axially displaced relative to the cutting assembly 4. The drill bit 31 starts to penetrate the surface of the ball valve 25. The cutting assembly 4 is rotation-30 ally coupled to the drill bit 31 and rotates on the surface of the ball valve 25 without penetrating substantially into the ball valve 25 as weight on bit is on the drill bit 31.The drill bit 31 makes a through hole 22 in the ball valve 25 as shown in figures 8 and 18. When the drill bit 31 breaks through top half of the ball valve 25, there is no axial resistance and the drill bit 31 is displaced to its maximum distal position relative to the 35 cutting assembly as shown in figure 9. In an alternative embodiment shown in figures 3491761317 to 26, the extended holder 35 is longer. The drill bit 31 abuts an internal wall of the ball valve 25 as shown in figure 19.The spring 54 is compressed and the weight on bit is transferred to the cutting assembly 4. During the displacement of the drill bit 31, the distal end portion 79 of the 5 sleeve 7 abuts the outer surface of the ball valve 25. The sleeve 7 has a larger diameter than the drill bit 31. Thereby the sleeve 7 is axially displaced along the extended holder 35 towards the proximal end 359. The catcher 33 which from the start is retracted within the sleeve 7, enters the through hole 22 in the retracted mode as the inner diameter of the sleeve 7 equals the diameter of the through hole 22 as shown in 10 figure 9. Figures 10 and 19 show the catcher 33 after the catcher 33 has been fully displaced through the first part of the ball valve 25. The catcher 33 enters the expanded mode after passage of the through hole 22 as seen in figures 10 and 19. The chamfered proximal end portion 70 of the sleeve 7 slides over the retainer 34 and forces the retainer 34 to enter a retracted mode as shown in figure 9.15 The cutting assembly 4 cuts out a first disc 29 and creates a passage 21 in the wall of the ball valve 25 as seen in figures 10 to 12. Figures 10 to 12 show when the cutting assembly 4 has penetrated the ball valve 25 and the disc 29 is within the receiving compartment 69. Due to that the weight on bit is on the cutting assembly 4, the drill bit assembly 3 is axially displaced at the same speed as the cutting assembly 4 into 20 the interior of the ball valve 25 as seen by comparing figures 9 and 10. The extended holder 35 is thereby axially displaced relative to the ball valve 25. The sleeve 7 is further displaced along the extended holder 35 towards the proximal end 359. The retainer 34 which is retracted within the sleeve 7, enters the through hole 22 in the retracted mode as the inner diameter of the sleeve 7 equals the diameter of the through 25 hole 22. The thickness of the wall of the ball valve 25 is known and the axial position of the retainer 34 on the extended holder 35 is adapted to this. When the cutting assembly 4 breaks through the wall of ball valve 25, the retainer 34 is positioned within the disc 29 as shown in figure 10. The retainer 34 remains within the disc 29 when the drill bit 31 advances through the second wall of the ball valve 25 as seen in figures 10 30 to 12. The retainer 34 presses against the interior of the through hole 22 and secures that the disc 29 remains within the receiving compartment 69 and rotates together with the cutting assembly 4.When the cutting assembly 4 breaks through the wall of the ball valve 25 and forms the passage 21, there is no axial resistance to the drilling assembly 1. The drill bit as-35 sembly 3 is via the drive shaft 52 directly connected to the adapter 51. The adapter 51 34917614is connected to the wireline tractor (not shown). Therefore, the drill bit assembly 3 will not be axially displaced. The cutting assembly 4 will be displaced axially in the distal direction due to the compressed spring 54 which is released when there is no axial resistance to the cutting assembly 4. Thereby the cutting assembly 4 is displaced axi-5 ally relative to the drill bit assembly 3 and the disc 29 as shown by comparing figure 10 with figure 11. The retainer 34 holds the disc 29 such that the disc 29 is displaced into the receiving compartment 69 as shown in figure 11. The length of the relative axially displacement of the cutting assembly 4 is determined by the dimension of an internal cavity 250 of the ball valve 25.10 Full weight on bit is again transferred to the drill bit 31 and the drill bit 31 makes a second through hole 220 in the second wall of the ball valve 25 as shown in figure 12. Weight on bit is transferred to the cutting assembly 4 which makes a second passage 210 in the ball valve 25 as shown in figures 13 to 15. A second disc 290 is formed. The disc 29 abuts the interior wall of the internal cavity 250 and is displaced in the 15 proximal direction of the drilling assembly 3 when the drill bit 31 has penetrated the second wall of the ball valve 25 and is further displaced through the ball valve 25. The disc 29 slides off the retainer 34. The retainer 34 enters an expanded mode on the distal side of the disc 29 and secures the disc 29 from dropping off the drill assembly 3 as seen in figure 13.20 When the cutting assembly 4 breaks through the whole ball valve 25 and have formed the passages 21, 210, there is no axial resistance to the drilling assembly 1. The drill bit assembly 3 is via the drive shaft 52 directly connected to the adapter 51. The adapter 51 is connected to the wireline tractor (not shown). Therefore, the drill bit assembly 3 will not be axially displaced. The cutting assembly 4 will be displaced axi-25 ally in the distal direction due to the compressed spring 54 which is released when there is no axial resistance to the cutting assembly 4. Thereby the cutting assembly 4 is displaced axially relative to the drill bit assembly 3 and the discs 29, 290 as shown in figure 14.The membrane 6 has a diameter that is close to the inner diameter of the tubular 30 body 41, but with a small clearance to an inner wall 411 (see figure 7) such that the membrane 6 does not act as a seal. The membrane holder 61 is shown fixed to the drive shaft 52. By comparison of figures 7 and 9, the distal displacement of the membrane 6 increases the volume of the inner compartment 60 and decreases the volume of the receiving compartment 69. When the cutting assembly 4 breaks through the 35 complete ball valve 25, the membrane 6 is displaced relative to the cutting assembly 349176154. The inner compartment 60 decreases in volume and liquid in the inner compartment 60 is evacuated through the insert 56. The receiving compartment 69 expands, which creates a sub-pressure in the receiving compartment 69. The discs 29, 290 have a diameter that corresponds to the internal diameter of the tubular body 41. The 5 pressure on the proximal side of the discs 29, 290 is less than on the distal side, and this pressure difference ensures that the discs 29, 290 stay within the tubular body 41 when the cutting assembly 4 is displaced distally relative to the drill bit 31.The dimensions of the ball valve 25 are known and the axial distance between the catcher 33 and the retainer 34 is adjusted to the dimensions of the ball valve 25. 10 Thereby the retainer 34 is positioned within the disc 29 when the cutting assembly 4 breaks through the first wall of the ball valve 25 as seen in figures 10 to 12. The retainer 34 is adapted to be rotated within the through hole 22 without losing the retaining capacity such that when the disc 29 is fully formed, the retainer 34 holds the disc 29 and the disc 29 rotates together with the cutting assembly 4.15 Break through of the complete ball valve 25 is noticed by a controlling system (not shown) as a drop of torque and a drop of weight on bit on the drilling assembly 1. The wireline tractor (not shown) and the drilling assembly 1 is then withdrawn from the ball valve 25 as seen in figure 15. The disc 29 is shown secured within the tubular body 41 by the retainer 34. The catcher 33 is positioned within the second disc 290.20 The second disc 290 is positioned within the tubular body 41. This safeguards the disc 29 and the second disc 290 from falling out of the tubular body 41 during the withdrawal of the drilling assembly 1 in the production tube. In addition, if the discs 29, 290 are displaced distally relative to the membrane 6, the pressure in the receiving compartment 69 on the proximal side of the disc 29 will drop, and the higher pressure 25 on the distal side of the discs 29, 290 will counteract the distal displacement. Together, these measures will secure that the discs 29, 290 do not fall out of the drilling assembly 1 during withdrawal.An alternative embodiment of the drilling assembly 1 is shown in figure 16. In this embodiment the displaceable sleeve 7 is provided with a spacer 71. The spacer 71 30 abuts an internal face 45 of the tubular body 41. The spacer 71 may be provided with a slide bearing (not shown) that abuts the internal face 45. The spacer 71 and the sleeve 7 support the drill bit assembly 3 such that the drill bit 31 is rotating around the centre axis 9.An alternative embodiment of the drilling assembly 1 is shown in figures 16 to 27. In 35 this embodiment the drilling assembly 1 is provided with the spring-loaded bolt 55 34917616within the radial bore 550 in the slidable house 53. The drive shaft 52 is on the surface 58 provided with at least one recess 57 formed with a sloping proximal end portion 570 and an opposite shoulder 579. The recess 57 is adapted to receive the spring-loaded bolt 55.5 An alternative embodiment of the drilling assembly 1 is shown in figures 16 to 27. In this embodiment the drilling assembly 1 comprises two retainers 341, 342. The first retainer 341 is positioned on the extended holder 35 such that the first retainer 341 has entered the through hole 22 when the drill bit 31 abuts the internal wall of the ball valve 25 as shown in figure 19. The displaceable sleeve 7 slides over the first retainer 10 341 and then over the second retainer 342 as shown by comparing figures 18 to 20 when the displaceable sleeve 7 abuts the outer surface of the ball valve 25. The second retainer 342 is positioned on the extended holder 35 such that the second retainer 342 is positioned within the disc 29 when the cutting assembly 4 breaks through the first wall of the ball valve as seen in figure 21. The retainer 342 presses against the 15 interior of the through hole 22 and secures that the disc 29 remains within the receiving compartment 69 and rotates together with the cutting assembly 4 as seen in figures 21 to 23. The disc 29 is pushed off the second retainer 342 when the disc 29 abuts the opposite internal wall of the ball valve 25 while the drill bit assembly 3 and the cutting assembly 4 is cutting further into the ball valve 25 as seen in figure 24. 20 The first retainer 341 has entered the second through hole 220 in the disc 290 as shown in figures 24 to 26.Break through of the complete ball valve 25 is noticed by a controlling system (not shown) as a drop of torque and a drop of weight on bit on the drilling assembly 1. The wireline tractor (not shown) and the drilling assembly 1 is then withdrawn from the 25 ball valve 25 as seen in figure 26. The disc 29 is shown secured within the tubular body 41 by the first retainer 341. The second disc 290 is shown secured within the tubular body 41 by the second retainer 342 The catcher 33 is positioned in a proximal position relative to the second disc 290. The second disc 290 is positioned within the tubular body 41. This safeguards the disc 29 and the second disc 290 from falling out 30 of the tubular body 41 during the withdrawal of the drilling assembly 1 in the production tube. In addition, if the discs 29, 290 are displaced distally relative to the membrane 6, the pressure in the receiving compartment 69 on the proximal side of the disc 29 will drop, and the higher pressure on the distal side of the discs 29, 290 will counteract the distal displacement. Together, these measures will secure that the 35 discs 29, 290 do not fall out of the drilling assembly 1 during withdrawal. 34917617In case the burr 299 of the second disc 290 is too stiff, the second disc 290 will remain in the mouth portion 49 of the tubular body 41 as shown in figure 27. The catcher 33 will be partly inside the second through hole 220 and partly on the distal side of the second disc 290. This will secure that the disc 290 does not fall out of the drilling 5 assembly 1 during withdrawal.It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. Use 10 of the verb "comprise" and its conjugations does not exclude the presence of elements or steps other than those stated in a claim. The article "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.15
Claims
34917618C l a i m s1. A drilling assembly (1) for making a passage in an object (2) within a petroleum well (8), said drilling assembly (1) is adapted to be displaced by a wireline tractor and supplied with a rotational force from a rotational motor, and said drilling as-5 sembly (1) comprising a drill bit assembly (3), a cutting assembly (4), and a rotatable drive assembly (5),- said drilling assembly (1) forming a longitudinal center axis (9);- said drill bit assembly (3) being fastened to the rotatable drive assembly (5);10 - said drill bit assembly (3) comprises a drill bit (31) at a free end (39) of the drill bit assembly (3);- said rotatable drive assembly (5) comprising a slidable house (53) comprising a central channel (536);- said cutting assembly (4) is formed by a tubular body (41) having a mouth 15 portion (49) provided with a hole saw assembly (42) and said cutting assembly (4) being fastened to the slidable house (53) at a proximal end portion (410);- said drill bit assembly (3) being positioned within said cutting assembly (4); and20 - said cutting assembly (4) being rotationally stiff and resiliently displaceable relative to the drill bit assembly (3) and the drive assembly (5) along the center axis (9), c h a r a c t e r i s e d i n that the drilling assembly (1) comprises a displaceable membrane (6) within the tubular body (41), the membrane (6) is oriented perpendicular to the longitudinal center axis (9), the25 membrane (6) comprises a central hole, the membrane (6) is fastened to one of the rotatable drive assembly (5) and the drill bit assembly (3) and the membrane (6) divides an interior (43) of the tubular body (41) into a receiving compartment (69) of variable volume and an inner compartment (60) of variable volume.2. The drilling assembly (1) according to claim 1, wherein the drill bit assembly (3)30 comprises a catcher (33) at a distal portion of the drill bit assembly (3).349176193. The drilling assembly (1) according to any one of the preceding claims, wherein the drill bit assembly (3) comprises a retainer (34) at a middle portion of the drill bit assembly (3).4. The drilling assembly (1) according to any one of the previous claims, wherein5 the drill bit assembly (3) comprises a displaceable sleeve (7) adapted to slide along a surface (358) of the drill bit assembly (3), said displaceable sleeve (7) having a proximal end portion (70) and a distal end portion (79).5. The drilling assembly (1) according to claim 4, wherein the displaceable sleeve (7) is formed with an internal chamfer at the proximal end portion (70).10 6. The drilling assembly (1) according to claim 4, wherein the displaceable sleeve (7) is provided with a spacer (71) and the spacer (71) is adapted to abut an internal (45) face of the tubular body (41).7. The drilling assembly (1) according to any one of the previous claims, wherein the rotatable drive assembly (5) has a proximal end (50) and a distal end15 (59), the drilling assembly (1) comprises:- an adapter (51);- a drive shaft (52) having a distal end (529) and a proximal end (520), the drive shaft (52) being connected to the adapter (51) at the proximal end (520) and to the drill bit assembly (3) at the distal end (529), said drive shaft 20 (52) being formed with a polygonal cross-section at a proximal end portion of the drive shaft (52);- a slidable house (53) comprising a central channel (536) and provided with an external circular distal end (539) connected to the cutting assembly (4);- a spring (54) encircling the drive shaft (52) between the adapter (51) and the25 slidable house (53), andthe drive shaft (52) is formed with an enlarged diameter at the distal portion (529), said enlarged diameter forms a shoulder (525).8. The drilling assembly (1) according to claim 7, wherein the slidable house (53) is provided with an insert (56) with a central guide (561) formed with a polygo-30 nal cross section adapted for receiving the drive shaft (52).349176209. The drilling assembly (1) according to claim 7, wherein the house (53) is provided with at least one radially oriented spring-loaded bolt (55), and the drive shaft (52) is provided with at least one recess (57), said recess (57) is formed with a sloping proximal end portion (570) and a distal shoulder (579), and said recess5 (57) is adapted to receive the spring-loaded bolt (55).10. A method for drilling a passage (21) in an object within a petroleum well (8), c h a r a c t e r i s e d i n that the method comprises to:- provide a drilling assembly (1) according to any one of the preceding claims and connect the drilling assembly (1) to a wireline tractor;10 - displace the drilling assembly (1) within the petroleum well (8) by the wireline tractor and to position the drilling assembly (1) in contact with the object (2); - engage the rotatable drive assembly (5) and add weight on the drill bit assembly (3) such hat the spring (54) becomes partly compressed;- make a through hole (22) in the object (2) by the drill bit (31);15 - add further weight on the cutting assembly (1) such that the spring (54) becomes further compressed and cut out at least one disc (29) from the object (2); and- displace the cutting assembly (4) forwardly and relative to the membrane (6) by the biasing force of the compressed spring (54),20 thereby fluid in the inner compartment (60) is evacuated proximally along the drive shaft (52) and a distance between the membrane (6) and the disc (29) is kept constant by a sub-pressure in the receiving compartment (69), and thereby the disc (29) follows the membrane (6) in the proximal direction into the receiving compartment (60).25 11. The method according to claim 10, wherein the method comprises to provide the drilling assembly (1) with a displaceable sleeve (7) prior to guiding the drilling assembly (1) into the petroleum well (8), and the sleeve (7) is positioned on the drill bit assembly (3) to cover the catcher (33) and keep the catcher (33) in a flush state with a surface (318, 358) of the drill bit assembly (3).3491762112. The method according to claim 11, wherein the method comprises to guide the catcher (33) into the through hole (22) in the flush state by abutting the sleeve’s (7) distal end portion (79) with the object (2) and displace the sleeve (7) proximally along the drill bit assembly (3) when the drill bit assembly (3) drills through5 the object (2).13. The method according to claim 12, wherein the method comprises to guide the sleeve (7) over the retainer (34) to squeeze the retainer (34) into the flush state with the surface (358) of the drill bit assembly (3).14. The method according to claim 13, wherein the method comprises to guide the10 retainer (34) into the through hole (22) in the flush state by abutting the sleeve’s (7) distal end portion (79) with the object (2) and displace the sleeve (7) proximally along the drill bit assembly (3) when the drill bit assembly (3) is displaced distally relative to the object (2).15. The method according to any one of claims 10 to 14, wherein the method com-15 prises to keep the retainer (34) positioned within the through hole (22) when the disc (29) is retrieved from the well (8).16. The method according to any one of claims 10 to 14, wherein the method comprises to cut two discs (29, 290) from a ball valve (25) and keep the catcher (33) positioned within the second through hole (220) of the distal disc (290) when the20 discs (29, 290) are retrieved from the well (8).34917622O v e r s a t t e p a t e n t k r a v1. En boresammenstilling (1) for tildanning av en passasje i en gjenstand (2) inni en oljebrønn (8), nevnte boresammenstilling (1) er tilpasset til å forskyves av en brønnkabeltraktor og forsynes med en rotasjonskraft fra en rotasjonsmotor, og5 nevnte boresammenstilling (1) omfatter en borsammenstilling (3), en skjæresammenstilling (4) og en roterbar drivsammenstilling (5),- nevnte boresammenstilling (1) tildanner en langsgående senterakse (9);- nevnte borsammenstilling (3) er festet til den roterbare drivsammenstillingen (5);10 - nevnte borsammenstilling (3) omfatter et bor (31) på en fri ende (39) av borsammenstillingen (3);- nevnte roterbare drivsammenstilling (5) omfatter et glidbart hus (53) som omfatter en sentral kanal (536);- nevnte skjæresammenstilling (4) er tildannet av et rørlegeme (41) som har et15 munnparti (49) forsynt med en hullsagsammenstilling (42), og nevnte skjæresammenstilling (4) er festet til det glidbare huset (53) på et proksimalt endeparti (410);- nevnte borsammenstilling (3) er posisjonert inni nevnte skjæresammenstilling (4); og20 - nevnte skjæresammenstilling (4) er rotasjonsstiv og fjærende forskyvbar i forhold til borsammenstillingen (3) og drivsammenstillingen (5) langs senteraksen (9) , k a r a k t e r i s e r t v e d at boresammenstillingen (1) omfatter en forskyvbar membran (6) inni rørlegemet (41), membranen (6) er orientert loddrett i forhold til den langsgående senteraksen (9), membranen (6) omfatter25 et sentralt hull, membranen (6) er festet til én av den roterbare drivsammenstillingen (5) og borsammenstillingen (3), og membranen (6) deler et indre (43) av rørlegemet (41) inn i et mottaksrom (69) av variabelt volum og et indre rom (60) av variabelt volum.2. Boresammenstillingen (1) ifølge krav 1, hvor borsammenstillingen (3) omfatter30 en fanganordning (33) på et distalt parti av borsammenstillingen (3).349176233. Boresammenstillingen (1) ifølge et hvilket som helst av de foregående kravene, hvor borsammenstillingen (3) omfatter en holdeanordning (34) på et midtparti av borsammenstillingen (3).4. Boresammenstillingen (1) ifølge et hvilket som helst av de foregående kravene,5 hvor borsammenstillingen (3) omfatter en forskyvbar muffe (7) tilpasset til å gli langs en overflate (358) på borsammenstillingen (3), idet nevnte forskyvbare muffe (7) har et proksimalt endeparti (70) og et distalt endeparti (79).5. Boresammenstillingen (1) ifølge krav 4, hvor den forskyvbare muffen (7) er tildannet med en indre skråfas på det proksimale endepartiet (70).10 6. Boresammenstillingen (1) ifølge krav 4, hvor den forskyvbare muffen (7) er forsynt med et avstandsstykke (71) og avstandsstykket (71) er tilpasset til å ligge an mot en indre (45) flate av rørlegemet (41).7. Boresammenstillingen (1) ifølge et hvilket som helst av de foregående kravene, hvor den roterbare drivsammenstillingen (5) har en proksimal ende (50) og en15 distal ende (59), idet boresammenstillingen (1) omfatter:- en adapter (51);- en drivaksel (52) som har en distal ende (529) og en proksimal ende (520), idet drivakselen (52) er koblet til adapteren (51) på den proksimale enden (520) og til borsammenstillingen (3) på den distale enden (529), idet nevnte drivaksel (52) er20 tildannet med et polygonalt tverrsnitt på et proksimalt endeparti av drivakselen (52);- et glidbart hus (53) omfattende en sentral kanal (536) og forsynt med en ekstern sirkulær distal ende (539) koblet til skjæresammenstillingen (4);- en fjær (54) som omgir drivakselen (52) mellom adapteren (51) og det glidbare25 huset (53), ogdrivakselen (52) er tildannet med en forstørret diameter på det distale partiet (529), idet nevnte forstørrede diameter tildanner en skulder (525).349176248. Boresammenstillingen (1) ifølge krav 7, hvor det glidbare huset (53) er forsynt med en innsats (56) med en sentral styreanordning (561) tildannet med et polygonalt tverrsnitt tilpasset for å romme drivakselen (52).9. Boresammenstillingen (1) ifølge krav 7, hvor huset (53) er forsynt med minst én5 radielt orientert fjærbelastet bolt (55), og drivakselen (52) er forsynt med minst én fordypning (57), idet nevnte fordypning (57) er tildannet med et skrånende proksimalt endeparti (570) og en distal skulder (579), og nevnte fordypning (57) er tilpasset til å romme den fjærbelastede bolten (55).10. En fremgangsmåte for boring av en passasje (21) i en gjenstand inni en oljebrønn10 (8) , k a r a k t e r i s e r t v e d at fremgangsmåten omfatter å:- tilveiebringe en boresammenstilling (1) ifølge et hvilket som helst av de foregående kravene og å koble boresammenstillingen (1) til en brønnkabeltraktor; - forskyve boresammenstillingen (1) inni oljebrønnen (8) med brønnkabeltraktoren og å posisjonere boresammenstillingen (1) i kontakt med gjenstanden (2);15 - sette den roterbare drivsammenstillingen (5) i inngrep og å legge vekt på borsammenstillingen (3) slik at fjæren (54) blir delvis sammentrykket;- lage et gjennomgående hull (22) i gjenstanden (2) med boret (31);- legge mer vekt på skjæresammenstillingen (1) slik at fjæren (54) blir ytterligere sammentrykket og å skjære ut minst én skive (29) fra gjenstanden (2); og20 - forskyve skjæresammenstillingen (4) fremover og i forhold til membranen (6) med forspenningskraften til den sammentrykte fjæren (54),derved evakueres fluid i det indre rommet (60) proksimalt langs drivakselen (52), og en avstand mellom membranen (6) og skiven (29) holdes konstant av et subtrykk i mottaksrommet (69), og derved følger skiven (29) membranen (6) i den25 proksimale retningen inn i mottaksrommet (60).11. Fremgangsmåten ifølge krav 10, hvor fremgangsmåten omfatter å forsyne boresammenstillingen (1) med en forskyvbar muffe (7) før boresammenstillingen (1) føres inn i oljebrønnen (8), og muffen (7) posisjoneres på borsammenstillingen34917625(3) for å dekke fanganordningen (33) og holde fanganordningen (33) i en slett tilstand med en overflate (318, 358) på borsammenstillingen (3).12. Fremgangsmåten ifølge krav 11, hvor fremgangsmåten omfatter å føre fanganordningen (33) inn i det gjennomgående hullet (22) i den slette tilstanden ved å5 legge muffens (7) distale endeparti (79) an mot gjenstanden (2) og forskyve muffen (7) proksimalt langs borsammenstillingen (3) når borsammenstillingen (3) borer gjennom gjenstanden (2).13. Fremgangsmåten ifølge krav 12, hvor fremgangsmåten omfatter å føre muffen (7) over holdeanordningen (34) for å klemme holdeanordningen (34) inn i den10 slette tilstanden med overflaten (358) på borsammenstillingen (3).14. Fremgangsmåten ifølge krav 13, hvor fremgangsmåten omfatter å føre holdeanordningen (34) inn i det gjennomgående hullet (22) i den slette tilstanden ved å legge muffens (7) distale endeparti (79) an mot gjenstanden (2) og å forskyve muffen (7) proksimalt langs borsammenstillingen (3) når borsammenstillingen (3)15 forskyves distalt i forhold til gjenstanden (2).15. Fremgangsmåten ifølge et hvilket som helst av kravene 10 til 14, hvor fremgangsmåten omfatter å holde holdeanordningen (34) posisjonert inni det gjennomgående hullet (22) når skiven (29) hentes fra brønnen (8).16. Fremgangsmåten ifølge et hvilket som helst av kravene 10 til 14, hvor frem-20 gangsmåten omfatter å skjære to skiver (29, 290) fra en kuleventil (25) og holde fanganordningen (33) posisjonert inni det andre gjennomgående hullet (220) i den distale skiven (290) når skivene (29, 290) hentes fra brønnen (8).
Drawings

Priority

22.02.2021 NO 20210227

Patent classes

IPC classesE21B 29/00CPC classesE21B 29/002E21B 29/00

Citations

US 2018/0179845 A1 (A1)US 2014/0305712 A1 (A1)US 2017/0159385 A1 (A1)US 2010/0101802 A1 (A1)

Applicants, owners and inventors

Owners
Altus Intervention (Technologies) AS
Moseidveien 35 4033 STAVANGER NO (STAVANGER Municipality, Rogaland county)Org. number: 915728847Inventors
Kristine Falk Gabrielsen
Løkkeveien 16 B 4008 STAVANGER NO (STAVANGER Municipality, Rogaland county)
Arne Motland
Klunglandsveien 2 4015 STAVANGER NO (STAVANGER Municipality, Rogaland county)
Lasse Haugland
Pastellveien 13 4344 BRYNE NO (TIME Municipality, Rogaland county)

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HÅMSØ PATENTBYRÅ AS
HÅMSØ PATENTBYRÅ AS

Org. number: 918752900

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Postboks 9 4068 STAVANGER NO (STAVANGER Municipality, Rogaland county)
Org. number: 918752900
Reference: P29798NO01

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InnsigelseReceived: 18.05.2026 NIPO's case No.: 2026/00217Current status: Under behandling. Brevveksling/utgående brev i saken
OpponentSAPEG AS Kvenildmyra 9 7093 TILLER NO
Opponent's agentACAPO ONSAGERS AS Edvard Griegs vei 1 5059 BERGEN NO (BERGEN Municipality, Vestland county)
Org. number: 932214636Reference: OP1547NO00

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