Key information

Title
Flow activated impact hammer
Application number
20211366
Case type
National
Status
05.05.2025 Patent meddelt (B1)
Filed
12.11.2021
Effective date
12.11.2021
Publicly available
15.05.2023
Next annual fee due
30.11.2026
Applicant
AGS SOLUTIONS AS (NO)
Owner
AGS SOLUTIONS AS (NO)
Inventor
Abbas Nabizadeh (NO) et al.
Agent
HÅMSØ PATENTBYRÅ AS (NO)
Granted
05.05.2025
Patent number
348694
Expiry date
12.11.2041

Abstract and drawing

Disclaimer: This text has been machine-scanned and may contain errors – please refer to "Publications" for legally binding content.
A tool for applying an impact to a stuck body in a well, the tool comprising: - an uphole end section and a downhole end section, the tool has a longitudinal axis extending from the uphole end section to the downhole end section; - a mandrel comprising an uphole end portion and a downhole end portion, the uphole end portion being connected to the uphole end section and the downhole end portion being connected to the downhole end section, the mandrel comprising a bore extending along the longitudinal axis from the uphole end portion to the down-hole end portion, the mandrel further comprising at least one slit in a mandrel wall extending coaxially with the axis; - a hammer sleave surrounding at least a portion of the mandrel and arranged to slide along the mandrel coaxially with the axis; - an activation means arranged inside the mandrel, the activation means com-prising a fluid passage, a ball seat, and at least one activation link member; and - a hammer biasing means for biasing the displaceable hammer sleeve towards the uphole end section.

Publications

B1A1
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Documents

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Date
 Date Doc. No. Process Case number In/Out Journal description To/from
 22.05.2025 02-01 Endring av søker/innehaver 2025/06250 UT GH Forespørsel HÅMSØ PATENTBYRÅ AS
 12.05.2025 01-03 Endring av søker/innehaver 2025/06250 INN Registreringsbrev HÅMSØ PATENTBYRÅ AS
 12.05.2025 01-02 Endring av søker/innehaver 2025/06250 INN Melding om endring HÅMSØ PATENTBYRÅ AS
 12.05.2025 01-01 Endring av søker/innehaver 2025/06250 INN Generell henvendelse HÅMSØ PATENTBYRÅ AS
 07.05.2025 19-01 Saksbehandling 20211366(348694) UT PT Registreringsbrev nasjonal patent (15) (PT20211366)
17.02.2025 18-01 Saksbehandling 20211366 UT Intention to grant HÅMSØ PATENTBYRÅ AS
 15.11.2024 17-03 Saksbehandling 20211366 INN P30165NO00_Response_Office_Action HÅMSØ PATENTBYRÅ AS
 15.11.2024 17-02 Saksbehandling 20211366 INN P30165NO00 Oversatte krav HÅMSØ PATENTBYRÅ AS
 15.11.2024 17-01 Saksbehandling 20211366 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 03.10.2024 16-01 Saksbehandling 20211366 UT Substantive examination HÅMSØ PATENTBYRÅ AS
 02.07.2024 15-06 Saksbehandling 20211366 INN P30165NO00_Response_Office_Action HÅMSØ PATENTBYRÅ AS
 02.07.2024 15-05 Saksbehandling 20211366 INN P30165NO00_amended_description HÅMSØ PATENTBYRÅ AS
 02.07.2024 15-04 Saksbehandling 20211366 INN P30165NO00_amended_description, mark-up HÅMSØ PATENTBYRÅ AS
 02.07.2024 15-03 Saksbehandling 20211366 INN P30165NO00 Amended_claims_mark-up HÅMSØ PATENTBYRÅ AS
 02.07.2024 15-02 Saksbehandling 20211366 INN P30165NO00 Amended_claims HÅMSØ PATENTBYRÅ AS
 02.07.2024 15-01 Saksbehandling 20211366 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 24.04.2024 14-01 Saksbehandling 20211366 UT Substantive examination HÅMSØ PATENTBYRÅ AS
 05.02.2024 13-04 Saksbehandling 20211366 INN P30165NO00_Response_Office_Action HÅMSØ PATENTBYRÅ AS
 05.02.2024 13-03 Saksbehandling 20211366 INN P30165NO00 Amended_claims_Mark-up HÅMSØ PATENTBYRÅ AS
 05.02.2024 13-02 Saksbehandling 20211366 INN P30165NO00 Amended_claims HÅMSØ PATENTBYRÅ AS
 05.02.2024 13-01 Saksbehandling 20211366 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 04.11.2023 12-01 Saksbehandling 20211366 UT Substantive examination HÅMSØ PATENTBYRÅ AS
 04.10.2023 11-01 Saksbehandling 20211366 UT PT Varsel om betaling av første årsavgift (3317) (PT20211366) HÅMSØ PATENTBYRÅ AS
 22.08.2023 10-02 Saksbehandling 20211366 INN P30165NO00_Response_Office_Action_Aug_22,_2023 HÅMSØ PATENTBYRÅ AS
 22.08.2023 10-01 Saksbehandling 20211366 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 22.05.2023 09-01 Saksbehandling 20211366 UT Substantive examination HÅMSØ PATENTBYRÅ AS
 09.03.2023 08-05 Saksbehandling 20211366 INN P30165NO00_Response_Office_Action_Mar_09,_2023 HÅMSØ PATENTBYRÅ AS
 09.03.2023 08-04 Saksbehandling 20211366 INN P30165NO00 Ark 1-4 HÅMSØ PATENTBYRÅ AS
 09.03.2023 08-03 Saksbehandling 20211366 INN P30165NO00 Amended_claims_Mark-up copy HÅMSØ PATENTBYRÅ AS
 09.03.2023 08-02 Saksbehandling 20211366 INN P30165NO00 Amended_claims HÅMSØ PATENTBYRÅ AS
 09.03.2023 08-01 Saksbehandling 20211366 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 10.01.2023 07-01 Saksbehandling 20211366 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 09.11.2022 06-01 Saksbehandling 20211366 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 03.11.2022 05-01 Saksbehandling 20211366 UT Infobrev til oppfinner HÅMSØ PATENTBYRÅ AS
 31.10.2022 04-01 Saksbehandling 20211366 INN Korrespondanse (Hovedbrev inn) HÅMSØ PATENTBYRÅ AS
 12.05.2022 03-02 Saksbehandling 20211366 UT PT report 02:14:20
12.05.2022 03-01 Saksbehandling 20211366 UT Substantive examination HÅMSØ PATENTBYRÅ AS
 17.11.2021 02-01 Saksbehandling 20211366 UT Infobrev til oppfinner HÅMSØ PATENTBYRÅ AS
 12.11.2021 01-08 Saksbehandling 20211366 INN P30165NO00_description_and_claims HÅMSØ PATENTBYRÅ AS
 12.11.2021 01-07 Saksbehandling 20211366 INN P30165NO00 - Signert generalfullmakt HÅMSØ PATENTBYRÅ AS
 12.11.2021 01-06 Saksbehandling 20211366 INN P30165NO00 - Retten til oppfinnelsen HÅMSØ PATENTBYRÅ AS
 12.11.2021 01-05 Saksbehandling 20211366 INN P30165NO00 - figur 7 HÅMSØ PATENTBYRÅ AS
 12.11.2021 01-04 Saksbehandling 20211366 INN P30165NO00 - figur 5-6 HÅMSØ PATENTBYRÅ AS
 12.11.2021 01-03 Saksbehandling 20211366 INN P30165NO00 - figur 3-4 HÅMSØ PATENTBYRÅ AS
 12.11.2021 01-02 Saksbehandling 20211366 INN P30165NO00 - figur 1-2 HÅMSØ PATENTBYRÅ AS
 12.11.2021 01-01 Saksbehandling 20211366 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
Technical fieldThe invention relates to well operations. More specifically the invention relates to coiled tubing and drill string operations in a well. More specifically the invention relates to fishing operations. Even more specifically the invention relates to dislodging of a stuck item in a the well, or a stuck string or coiled tubing.BackgroundIn drilling and operation of wells, especially oil and gas wells, various equipment, e.g., downhole tools, drill string and coiled tubing might get stuck in a well. To release the equipment, a force is applied to the coiled tubing or the drill string. For coiled tubing operations in specific, applying a pull force to the coiled tubing at the surface often gives little effect due to the limited strength of the coiled tubing. Hence, in many cases, force should be applied by creating an impact directly to or in the vicinity of the part that is stuck.Patent US 5503228 discloses a jar apparatus comprising a plurality of pistons secured together to form a piston assembly. The piston assembly forces a hammer member and a movable anvil portion axially to cock the jar in response to an applied actuation pressure differential. A biasing spring moves the anvil portion against an anvil support portion when the pressure differential is released. The jar apparatus has a flow path through the jar apparatus to allow a drop ball to pass through in order to actuate a release tool below the jar apparatus. Patent application US 2021/0396088 discloses a jarring tool comprising a longitudinal displaceable piston, a first fluid chamber which decreases in volume in response to the displacement of the piston, a flow controller that controls flow of fluid between the first chamber and a second fluid chamber, and a plug seat secured to the piston. A pressure differential is applied across the plug. The plug restriction flows from a first flow passage section to a second flow passage section thereby increasing a flow rate of fluid from the first flow passage section.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 in the claims that follow.Summary of the inventionIn one aspect, the present invention relates to a tool for applying an impact to a stuck body in a well, the tool comprising:- an uphole end section and a downhole end section, the tool forms a longitudinal axis extending from the uphole end section to the downhole end section;- a mandrel comprising:- an uphole end portion, the uphole end portion being threadly connected to the uphole end section;- a downhole end portion, the downhole end portion being threadly connected to the downhole end section;- a bore extending along the longitudinal axis from the uphole end portion to the downhole end portion;- at least one elongated slit in a mandrel wall extending coaxially with the longitudinal axis; and- a bypass hole in the mandrel wall positioned in an uphole direction relative to the at least one elongated slit;- a displaceable hammer sleeve surrounding at least a portion of the mandrel and arranged to slide along the mandrel coaxially with the longitudinal axis, the mandrel and the displaceable hammer sleeve form between them an annulus; - an activation means sealingly slidable arranged within the bore, the activation means comprising from an uphole end towards a downhole end:- a ball seat;- a collet comprising a main body and at least one finger extending into the at least one elongated slit;- a fluid passage within the main body; and- a tube slidable within the downhole end portion;- a link sleeve connected at a downhole end portion of the displaceable hammer sleeve, the link sleeve comprises within the hammer sleeve a tab arranged to extend into the at least one elongated slit and to be engaged by the at least one activation link member in a lock position;- a hammer biasing means within the annulus for biasing the displaceable hammer sleeve towards the uphole end section; and- a spring at the downhole end portion being arranged to bias the activation means towards the uphole end section.The tool may be advantageous in that the activation means may be engaged to the displaceable hammer sleeve through the at least one slit, so that by displacing the activation means, the displaceable hammer sleeve is displaced against a biasing force from the hammer biasing means, thereby increasing a biasing force acting on the displaceable hammer sleeve from the hammer biasing means.A diameter of the bore may vary along the longitudinal axis to enable insertion of the activation means.The activation means may be arranged to be displaced towards the downhole end section. The activation means may be arranged to be displaced towards the downhole end section by a fluid. The fluid may be pumped into the hammer tool via the uphole end section.The at least one finger may be engaged directly to the displaceable hammer sleeve. The at least one finger may be engaged via an intermediate member connected to the man drel. The at least one finger may be engaged via an intermediate member connected to the displaceable hammer sleeve.The displaceable hammer sleeve may be arranged to be engaged by the at least one finger through the at least one slit.The fluid passage may be arranged to form a fluid flow through the activation means. The hammer biasing means may comprise a sealed chamber in the annulus between the displaceable hammer sleeve and the mandrel. The sealed chamber may contain a compressed gas.A volume inside the chamber may be arranged to be decreased when the displaceable hammer sleeve is displaced towards the downhole end section.Using a compressed gas is advantageous in that a compressed gas may give a stronger biasing force than using a spring or hydraulics.The hammer biasing means may in certain embodiments comprise a spring. Alternatively, the biasing means may comprise a combination of a compressed gas and a spring. An advantage of using compressed gas is that the biasing force may be changed based on the operation being performed by varying the amount of gas filled in the chamber. The hammer biasing means may in an alternative embodiment comprise a chamber containing a volume, the chamber being arranged to increase the volume when the displaceable hammer sleeve is displaced towards the downhole end section. An underpressure in the chamber thereby creates a biasing force acting on the displaceable hammer sleeve.The at least one finger may be splayed and biased outwards towards the displaceable hammer sleeve.The activation means may be arranged to receive an activation ball in the ball seat, so that the fluid passage is closed for fluid flow.The activation means may be arranged to seal the bore when the activation ball is seated in the ball seat. The displaceable hammer sleeve is engaged by the activation means in the lock position and disengaged from the activation means in a release position.The displaceable hammer sleeve may further be arranged to be displaced by the activation means towards the downhole end section, to be biased towards the uphole end section by the hammer biasing means, and to create an impact to the stuck body.An advantage of being able to seal the bore by use of an activation ball is that the hammer tool can be activated by dropping an activation ball into a coiled tubing or a drill string and by further pumping fluid down the coiled tubing. The activation ball and the activation means are displaced by the fluid, thereby displacing the displaceable hammer sleeve.The displaceable hammer sleeve may be arranged to impact the uphole end section. The spring may be arranged to bias the activation means towards the uphole end section. The activation means may be adapted to be displaced towards the uphole end section by the spring and to reengage to the displaceable hammer sleeve via the link sleeve member.The spring may be positioned inside the mandrel between the downhole end section and the activation means. The spring may be arranged inside a sleeve.The bypass hole may be arranged to be closed when the activation means is between the lock position and a release position. The bypass hole may be opened when the activation means passes a bypass position.The activation means may further be arranged to be further displaced towards the downhole end section and open the bypass hole for fluid flow.The fluid passage may be formed by a tube. The tube may have a flange being in direct contact with the biasing means. The flange may comprise tabs with space between the tabs to allow fluid pass between the tabs. The flange may have holes to allow fluid pass through the holes. The uphole end section may be formed from the same material piece as the mandrel. The downhole end section may be formed from the same material piece as the mandrel. The stuck body may be a piece of a tool, a coiled tubing or a drill string.In another aspect, the invention relates to a method for applying an impact to a stuck body in a well, the method comprising the steps of:a. providing a tool according to any one of the preceding claims;b. pumping fluid through a pipe down to the tool;c. activating the tool by dropping an activation ball inside the pipe, the activation ball being collected in the ball seat, the activation ball and the ball seat means together sealing the bore;d. displacing the activation means and the activation ball from a lock position towards a release position by further pumping of the fluid down the pipe;e. displacing the displaceable hammer sleeve together with the activation means; and f. disengaging the displaceable hammer sleeve from the activation means in a release position, the displaceable hammer sleeve being biased towards the uphole end section by the hammer biasing means and creating an impact to the stuck body.The invention further relates to a method for applying a series of impacts to a stuck body in a well, the method comprising performing the steps of a. to f. above and further performing the steps of:g. further displacing the activation means and the activation ball towards a bypass position, whereby the bypass hole is opened;h. using the biasing means to move the activation means back to the lock position, thereby the displaceable hammer sleeve is reengaged to the activation means; andj. repeating steps d. to h. a number of times for applying a series of impacts.The displaceable hammer sleeve may impact the uphole end section. The uphole end section may be a sub. The downhole end section may be a sub. The tool may be applied in downhole fishing operations in oil and gas wells. The tool may be attached to a coiled tubing or a drill string. The stuck body to be impacted may be the coiled tubing or the drill pipe to which the tool is connected.The tool according to any of the above aspects is advantageous in that it can be ball activated. Activation of the tool by a ball is advantageous in that the tool is inactive when a ball is not present in the ball seat, so that other operations may be performed. If an impact is desirable, the tool can be activated by dropping a ball into the coiled tubing or the drill string, and a number of impacts can be created. By removing the ball, by e.g., reversing the fluid flow, the ball can be retracted, and normal operation can continue. The tool can be a part of a standard bottom hole assembly and can be activated and deactivated as required.Specific descriptionIn the following is described an example of a preferred embodiment illustrated in the accompanying drawings, wherein:Fig.1 shows the hammer tool in an initial state before it is activated;Fig.2 shows the hammer tool upon activation by an activation ball, wherein an activation means is in a lock position;Fig.3 shows the hammer tool wherein the activation means is displaced by fluid in the tool;Fig.4 shows the hammer tool wherein the activation means is in a release position;Fig.5 shows the hammer tool wherein the activation means are in a bypass position;Fig.6 shows the hammer tool wherein the activation means are back in the lock position as shown in figure 1; andFig.7A-C show a section of the tool 100 in the states shown in figures 3 to 5. The hammer tool is shown in a cross-sectional view in the figures 1 to 6. Note that the embodiment of the hammer tool shown is merely an example, and that the scale of the different elements is not completely accurate. Likewise, the method steps shown are merely meant to present a possible example of the method according to the invention. The hammer tool 100 shown in figures 1 to 6 comprises a mandrel 2, an uphole end section 1 and a downhole end section 9, a displaceable hammer sleeve 3, an activation means 4, and a biasing means 5. The uphole end section 1 is in the figures shown as a top sub 1. The downhole end section 9 is in the figures shown as a bottom sub 9.An uphole end portion 21 of the mandrel 2 is connected to the top sub 1 by a threaded connection 11. A downhole end portion 29 of the mandrel 2 is connected to the bottom sub 9 by a threaded connection 91. The hammer tool 100 forms a longitudinal axis X1 extending from the uphole end portion 21 to the downhole end portion 29. A bore 22 extends through the mandrel 2 along the longitudinal axis X1. The top sub 1 and the bottom sub 9 have holes to allow a flow of fluid through the top sub 1, through the mandrel 2 and through the bottom sub 9.The displaceable hammer sleeve 3 is oriented along the longitudinal axis X1 and covers at least a portion of a downhole portion 12 of the top sub 1 and a portion of the mandrel 2. A link sleeve 31 is connected to the displaceable hammer sleeve 3 at a downhole end portion 39 of the displaceable hammer sleeve 3 via a threaded connection 32. A portion of an uphole end of the hammer sleeve 3 slidably encloses a portion of the downhole portion 12 of the top sub 1. An O-ring 70 seals between the sleeve 3 and the downhole portion 12. A portion of the link sleeve 31 slidably enclose a portion of the downhole end portion 29 of the mandrel 2. O-rings 70 seal between the link sleeve 31 and the downhole end portion 29.The hammer tool 100 further comprises a hammer biasing means 6 in the figure shown as a chamber 60. The chamber 60 is enclosed between the displaceable hammer sleeve 3 and the mandrel 2 and is restricted in a downhole end by a ring-shaped outer projection 25 on the outside of the mandrel 2, and in an uphole end by a ring-shaped inner projection 33 on the inside of the displaceable hammer sleeve 3. The chamber 60 is sealed at the projections 25 and 33 by O-rings 70. When the displaceable hammer sleeve 3 slides towards the bottom sub 9, the volume enclosed by the chamber 60 is reduced.In the figures, the biasing means 5 is shown as a spring 51 contained within a sleeve 52. The sleeve 52 lines a downhole portion of the bore 22. The inside surface of the sleeve 52 is coned outwards in an uphole end 521 to form a smooth transition surface 53 against the inside wall of the mandrel 2. At a downhole end 529 of the sleeve 52, the spring 51 abuts the bottom sub 9.The activation means 4 is sealingly slidable inside the bore 22 along the longitudinal axis X1. The activation means 4 further comprises a fluid passage 45. In the figures the activation means 4 is shown as a collet 42 and a tube 41. The collet 42 comprises a main body 42a and at least one activation link member. The at least one activation link member is in the figures shown as two fingers 42b attached to the main body 42a, but in the example five fingers 42b are used. In one example the fluid passage 45 is formed by the main body 42a and the tube 41 as shown in figure 1. The tube 41 has a discontinuous flange 41a at a downhole end, the tube 41 extending in a downhole direction into the sleeve 52 so that the flange 41a abuts the spring 51. The flange 41a comprises four tabs with space in between, so that the flange 41a allows fluid to pass between the tabs. The spring 51 acts on the activation means 4 via the flange 41a, with a biasing force in an uphole direction. The tube 41 abuts the main body 42a in an uphole end.The fingers 42b extend in a downhole direction and are splayed and biased outwards towards the displaceable hammer sleeve 3. The main body 42a, is sealingly movable inside the bore 22 along the longitudinal axis X1. The tube 41 is arranged to move with the main body 42a.The collet 42 further forms a ball seat 44 at an uphole end of the activation means 4. The hammer tool 100 forms a continuous fluid channel through the top sub 1, the bore 22, the collet 42, the tube 41, the sleeve 52 and the bottom sub 9.Further, the mandrel 2 has five elongated slits 24 through a mandrel wall 26. The elongated slits 24 are arranged to let the fingers 42b extend into the elongated slits 24. The displaceable hammer sleeve 3 has at least one sleeve link member attached thereto. The sleeve link members are in the figures shown as two tabs 34 connected to the link sleeve 31. The sleeve link members are arranged to extend into the elongated slits 24 and to be engaged by the fingers 42b. The downhole end surfaces of the elongated slits 24 are slanted towards the transition surface 53, to form guide surfaces 24a for disengaging the fingers 42b from the tabs 34 as shown in figure 4. When displacing the activation means 4 further towards the bottom sub 9, the fingers 42b are guided into the sleeve 52 as shown in figures 5 and 7C.The mandrel 2 further has a hole through a mandrel wall 26 forming a bypass hole 23 from the inside of the mandrel 2 to the outside of the mandrel 2. The bypass hole 23 is positioned in an uphole direction relative to the position of the elongated slits 24.The tool 100 further comprises an arrangement (not shown) for filling the chamber 60 with a compressed gas.In the initial state shown in figure 1 the activation means 4 sealingly closes the bypass hole 23 only allowing fluid to flow through the hammer tool 100 via the collet 42 and the tube 41. The fingers 42b are in this state releasably engaged to the displaceable hammer sleeve 3 via the tabs 34. Before use of the hammer tool 100, the chamber 60 is filled with a compressed gas, such as nitrogen gas. The nitrogen gas acts with a compressive force on the displaceable hammer sleeve 3 via the inner projection 33 in an uphole direction, biasing the displaceable hammer sleeve 3 towards the top sub 1. The hammer tool 100 is equipped with a number of sealing means, such as O-rings 70’.In use, the top sub 1 of the hammer tool 100 is threadly connected to a coiled tubing or a drill string (not shown). In the opposite end of the hammer tool 100, the bottom sub 9 is threadly connected to a fishing tool (not shown). Fluid is pumped from the surface (not shown) through the coiled tubing, the fluid entering the hammer tool 100 through the top sub 1. The fluid further flows into the bore 22 and through the fluid passage 45 and the sleeve 52 before it exits the hammer tool 100 through the bottom sub 9. Before activation the hammer tool 100 is in a lock position as shown in figure 1, wherein the displaceable hammer sleeve 3 is engaged by the activation means 4. To activate the hammer tool 100, an activation ball 43 is dropped into the coiled tubing. The activation ball 43 follows the fluid down through the coiled tubing to the hammer tool 100 where it is collected by the ball seat 44, as shown in figure 2. The activation ball 43 blocks the fluid from flowing through the fluid passage 45. The activation means 4 with the displaceable hammer sleeve 3 engaged thereto are then displaced towards the bottom sub 9 by the fluid, as shown in figures 3 and 7A. The displacement of the displaceable hammer sleeve 3 decreases the volume inside the chamber 60, thereby compressing the gas in the chamber 60. The displacement of the activation means 4 and hence the tube 41 compresses the spring 51.Upon continued pumping of fluid down the coiled tubing, the fingers 42b abuts the guide surfaces 24a. Displacing the activation means 4 further, the fingers 42b are guided into the sleeve 52 so that they are disengaged from the link sleeve 31 in a release position as shown in figure 4 and 7B. Thereby the displaceable hammer sleeve 3 is released from the activation means 4. The biasing force caused by the compressed gas in the chamber 60, forces the displaceable hammer sleeve 3 against the top sub 1, thereby the displaceable hammer sleeve 3 impacts the top sub 1 at an impact surface 13. The impact propagates through the mandrel 2 to the fishing tool. Thereby a hammer stroke is created, which impacts both the coiled tubing/drill string and the fishing tool.Upon continued displacement of the activation means 4, the fingers 42b are further guided into the sleeve 52 by the guide surfaces 24a, as shown in figures 5 and 7C. At a bypass position shown in figure 5, the bypass hole 23 is opened and the fluid bypasses the tube 41 by flowing through the bypass hole 23 into an annulus 61 between the mandrel 2 and the displaceable hammer sleeve 3. The fluid flows further through the elongated slits 24, through the spaces in the discontinuous flange 41a and into the sleeve 52 and exits the hammer tool 100 through the bottom sub 9. The fluid pressure drops as the bypass hole 23 is opened, and the activation means 4 are moved back towards the top sub 1 by the spring 51. When the activation means 4 reaches the lock position, the fingers 42b reengage to the tabs 34 through the elongated slits 24 as shown in figure 6. Thereby, the hammer tool 100 is retrieved to the state shown in figure 2, whereby another hammer stroke can be delivered by the continuous pumping of fluid down the coiled tubing. Even though coiled tubing is used in describing the use of the tool, the tool might be connected to a drill string. The dimension of the tool is different when attached to a drill string compared to a coiled tubing.The terms downhole end and uphole end is used to describe the directions of various pieces of the tool 100 as they will be positioned when coupled to a coil tubing or a drill pipe.The use of the verb "to comprise" and its different forms does not exclude the presence of elements or steps that are not mentioned in the claims. The indefinite article "a" or "an" before an element does not exclude the presence of several such elements.
Claims
C l a i m s1. A tool (100) for applying an impact to a stuck body in a well,c h a r a c t e r i z e d i n that the tool (100) comprising:- an uphole end section (1) and a downhole end section (9), the tool (100) has a longitudinal axis (X1) extending from the uphole end section (1) to the downhole end section (9);- a mandrel (2) comprising:- an uphole end portion (21), the uphole end portion (21) being threadly connected to the uphole end section (1);- a downhole end portion (29), the downhole end portion (29) being threadly connected to the downhole end section (9);- a bore (22) extending along the longitudinal axis (X1) from the uphole end portion (21) to the downhole end portion (29);- at least one elongated slit (24) in a mandrel wall (26) extending coaxially with the longitudinal axis (X1); and- a bypass hole (23) in the mandrel wall (26) positioned in an uphole direction relative to the at least one elongated slit (24);- a displaceable hammer sleeve (3) surrounding at least a portion of the mandrel (2) and arranged to slide along the mandrel (2) coaxially with the longitudinal axis (X1), the mandrel (2) and the displaceable hammer sleeve (3) form between them an annulus (61);- an activation means (4) sealingly slidable arranged within the bore (22), the activation means (4) comprising from an uphole end towards a downhole end:- a ball seat (44);- a collet (42) comprising a main body (42a) and at least one activation finger (42b) extending into the at least one elongated slit (24);- a fluid passage (45) within the main body (42a); and- a tube (41) slidable within the downhole end portion (29);- a link sleeve (31) connected at a downhole end portion (39) of the displaceable hammer sleeve (3), the link sleeve (31) comprises within the hammer sleeve (3) a tab (34) arranged to extend into the at least one elongated slit and to be engaged by the at least one activation link member (42b) in a lock position; - a hammer biasing means (6) within the annulus (61) for biasing the displaceable hammer sleeve (3) towards the uphole end section (1); and- a spring (5) at the downhole end portion (29) being arranged to bias the activation means (4) towards the uphole end section (1).2. The tool (100) according to claim 1, wherein the activation means (4) is arranged to be displaced towards the downhole end section (9) by a fluid.3. The tool (100) according to any one of the preceding claims, wherein the hammer biasing means (6) comprises a sealed chamber (60) in the annulus (61), the sealed chamber (60) is arranged to contain a compressed gas,and a volume inside the sealed chamber (60) is arranged to be decreased when the displaceable hammer sleeve (3) is displaced towards the downhole end section (9).4. The tool (100) according to any one of the preceding claims wherein the activation means (4) is arranged to seal the bore (22) when an activation ball (43) is seated in the ball seat (44), and the activation means (4) is further arranged to be displaced towards the downhole end section (9) by a fluid.5. The tool (100) according to any one of the preceding claims, wherein the displaceable hammer sleeve (3) is engaged by the activation means (4) in the lock position and disengaged from the activation means (4) in a release position.6. The tool (100) according to any one of the preceding claims, wherein the displaceable hammer sleeve (3) further is arranged to be displaced by the activation means (4) towards the downhole end section (9), to be biased towards the uphole end section (1) by the hammer biasing means (6), and to create an impact to the stuck body.7. The tool (100) according to claim any one of the preceding claims, wherein the activation means (4) is adapted to be displaced towards the uphole end section (1) by the spring (5) and to reengage to the displaceable hammer sleeve (3) via the link sleeve member.8. The tool (100) according to any one of the preceding claims, wherein the bypass hole (23) is arranged to be closed when the activation means (4) is between the lock position and a release position.9. The tool (100) according to any one of the preceding claims, wherein the stuck body is either a piece of well equipment, a coiled tubing or a drill string.10. A method for applying an impact to a stuck body in a well, the method comprising the steps of:a. providing a tool (100) according to any one of the preceding claims;b. pumping fluid through a pipe down to the tool (100);c. activating the tool (100) by dropping an activation ball (43) inside the pipe, the activation ball (43) being collected in the ball seat (44), the activation ball (43) and ball seat (44) together sealing the bore (22);d. displacing the activation means (4) and the activation ball (43) from a lock position towards a release position, by further pumping of the fluid down the pipe;e. displacing the displaceable hammer sleeve (3) together with the activation means (4); andf. disengaging the displaceable hammer sleeve (3) from the activation means (4) in a release position, the displaceable hammer sleeve (3) being biased towards the uphole end section (1) by the hammer biasing means (6) and creating an impact to the stuck body.11. The method for applying an impact to a stuck body in a well according to claim 10, the method further comprising performing the steps of:g. further displacing the activation means (4) and the activation ball (43) towards a bypass position, whereby the bypass hole (23) is opened;h. using the spring (5) to move the activation means (4) and the activation ball (43) back to the lock position, thereby the displaceable hammer sleeve (3) is reengaged to the activation means (4); andj. repeating steps d. to h. a number of times for applying a series of impacts.12. The method for applying an impact to a stuck body according to claim 10 or 11, wherein the displaceable hammer sleeve (3) impacts the uphole end section (1).Patentkrav1. Et verktøy (100) for påføring av et støt mot et legeme som sitter fast i en brønn, k a r a k t e r i s e r t v e d at verktøyet (100) omfatter:- en opphulls-endeseksjon (1) og en nedhulls-endeseksjon (9), idet verktøyet (100) har en langsgående akse (X1) som strekker seg fra opphulls-endeseksjonen (1) til nedhulls-endeseksjonen (9);- en rørstamme (2) omfattende:- et opphulls-endeparti (21), idet opphulls-endepartiet (21) er gjenget forbundet med opphulls-endeseksjonen (1);- et nedhulls-endeparti (29), idet nedhulls-endepartiet (29) er gjenget forbundet med nedhulls-endeseksjonen (9);- en boring (22) som strekker seg langs den langsgående aksen (X1) fra opphulls-endepartiet (21) til nedhulls-endepartiet (29);- minst én langstrakt spalte (24) i en rørstammevegg (26) som strekker seg koaksialt med den langsgående aksen (X1); og- et omløpshull (23) i rørstammeveggen (26) posisjonert i en opphullsretning i forhold til den minst ene langstrakte spalten (24);- en forskyvbar hammerhylse (3) som omgir i det minste et parti av rørstammen (2) og er anordnet til å gli langs rørstammen (2) koaksialt med den langsgående aksen (X1), idet rørstammen (2) og den forskyvbare hammerhylsen (3) tildanner mellom seg et ringrom (61);- et aktiveringsmiddel (4) forseglende glidbart anordnet inni boringen (22), idet aktiveringsmiddelet (4) omfatter fra en opphulls-ende mot en nedhulls-ende:- et kulesete (44);- en krage (42) som omfatter et hovedlegeme (42a) og minst én aktiveringsfinger (42b) som strekker seg inn i den minst ene langstrakte spalten (24);- en fluidpassasje (45) inni hovedlegemet (42a); og- et rør (41) som kan gli inni nedhulls-endepartiet (29);- en linkhylse (31) tilkoblet på et nedhulls-endeparti (39) av den forskyvbare hammerhylsen (3), idet linkhylsen (31) omfatter inni hammerhylsen (3) en tapp (34) anordnet til å strekke seg inn i den minst ene langstrakte spalten og til å komme i inngrep med av det minst ene aktiveringslinkelementet (42b) i en låseposisjon;- et hammerforspenningsmiddel (6) inni ringrommet (61) for å forspenne den forskyvbare hammerhylsen (3) mot opphulls-endeseksjonen (1); og- en fjær (5) på nedhulls-endepartiet (29) som er anordnet til å forspenne aktiveringsmiddelet (4) mot opphulls-endeseksjonen (1).2. Verktøyet (100) ifølge krav 1, hvor aktiveringsmiddelet (4) er anordnet til å forskyves mot nedhulls-endeseksjonen (9) av et fluid.3. Verktøyet (100) ifølge et hvilket som helst av de foregående kravene, hvor hammerforspenningsmiddelet (6) omfatter et forseglet kammer (60) i ringrommet (61), det forseglede kammeret (60) er anordnet til å romme en komprimert gass, og et volum inni det forseglede kammeret (60) er anordnet til å reduseres når den forskyvbare hammerhylsen (3) forskyves mot nedhulls-endeseksjonen (9).4. Verktøyet (100) ifølge et hvilket som helst av de foregående kravene, hvor aktiveringsmiddelet (4) er anordnet til å forsegle boringen (22) når en aktiveringskule (43) settes i kulesetet (44), og aktiveringsmiddelet (4) er videre anordnet til å forskyves mot nedhulls-endeseksjonen (9) av et fluid.5. Verktøyet (100) ifølge et hvilket som helst av de foregående kravene, hvor den forskyvbare hammerhylsen (3) kommer i inngrep med aktiveringsmiddelet (4) i låseposisjonen og er koblet fra aktiveringsmiddelet (4) i en frigjøringsposisjon.6. Verktøyet (100) ifølge et hvilket som helst av de foregående kravene, hvor den forskyvbare hammerhylsen (3) videre er anordnet til å forskyves av aktiveringsmiddelet (4) mot nedhulls-endeseksjonen (9), til å forspennes mot opphullsendeseksjonen (1) av hammerforspenningsmiddelet (6), og til å skape et støt mot legemet som sitter fast.7. Verktøyet (100) ifølge et hvilket som helst av de foregående kravene, hvor aktiveringsmiddelet (4) er tilpasset til å forskyves mot opphulls-endeseksjonen (1) av fjæren (5) og til å gå i nytt inngrep med den forskyvbare hammerhylsen (3) via linkhylseelementet.8. Verktøyet (100) ifølge et hvilket som helst av de foregående kravene, hvor omløpshullet (23) er anordnet til å være lukket når aktiveringsmiddelet (4) er mellom låseposisjonen og en frigjøringsposisjon.9. Verktøyet (100) ifølge et hvilket som helst av de foregående kravene, hvor legemet som sitter fast, er enten et stykke brønnutstyr, et kveilet rør eller en borestreng.10. Fremgangsmåte for å påføre et støt mot et legeme som sitter fast i en brønn, idet fremgangsmåten omfatter trinnene å:a. tilveiebringe et verktøy (100) ifølge et hvilket som helst av de foregående kravene;b. pumpe fluid gjennom et rør og ned til verktøyet (100);c. aktivere verktøyet (100) ved å slippe en aktiveringskule (43) inni røret, idet aktiveringskulen (43) fanges i kulesetet (44), idet aktiveringskulen (43) og kulesetet (44) sammen forsegler boringen (22);d. forskyve aktiveringsmiddelet (4) og aktiveringskulen (43) fra en låseposisjon mot en frigjøringsposisjon ved videre pumping av fluidet ned røret;e. forskyve den forskyvbare hammerhylsen (3) sammen med aktiveringsmiddelet (4); ogf. koble den forskyvbare hammerhylsen (3) fra aktiveringsmiddelet (4) i en frigjøringsposisjon, idet den forskyvbare hammerhylsen (3) er forspent mot opphullsendeseksjonen (1) av hammerforspenningsmiddelet (6) og skaper et støt mot legemet som sitter fast.11. Fremgangsmåten for å påføre et støt mot et legeme som sitter fast i en brønn, ifølge krav 10, idet fremgangsmåten videre omfatter å utføre trinnene:g. videre å forskyve aktiveringsmiddelet (4) og aktiveringskulen (43) mot en omløpsposisjon, hvorved omløpshullet (23) åpnes;h. å anvende fjæren (5) til å flytte aktiveringsmiddelet (4) og aktiveringskulen (43) tilbake til låseposisjonen, derved går den forskyvbare hammerhylsen (3) på nytt i inngrep med aktiveringsmiddelet (4); ogj. å gjenta trinn d. til h. et gitt antall ganger for å påføre en serie med støt.12. Fremgangsmåten for å påføre et støt mot et legeme som sitter fast, ifølge krav 10 eller 11, hvor den forskyvbare hammerhylsen (3) støter mot opphullsendeseksjonen (1).
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IPC classesE21B 31/113CPC classesE21B 31/1135E21B 31/113

Citations

US 5503228 A (A)US 2021396088 A1 (A1)US 3946819 A (A)

Applicants, owners and inventors

Owners
AGS SOLUTIONS AS
Forusbeen 226 4313 SANDNES NO (SANDNES Municipality, Rogaland county)Org. number: 923275223Inventors
Abbas Nabizadeh
H0404, Sandesletta 21 B 4050 SOLA NO (SOLA Municipality, Rogaland county)
Geir Ueland
Nordsjøvegen 150 4055 SOLA NO (SOLA Municipality, Rogaland county)

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HÅMSØ PATENTBYRÅ AS
HÅMSØ PATENTBYRÅ AS

Org. number: 918752900

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