Key information

Title
Method and device to supply a constant, discrete hydraulic volume using a single pressure input cycle.
Application number
20190667
Case type
National
Status
21.09.2020 Patent meddelt (B1)
Filed
24.05.2019
Effective date
24.05.2019
Publicly available
21.09.2020
Next annual fee due
31.05.2027
Applicant
BOSSA NOVA AS (NO)
Owner
BOSSA NOVA AS (NO)
Inventor
Anthony Kent (US)
Agent
BRYN AARFLOT AS (NO)
Granted
21.09.2020
Patent number
345081
Expiry date
24.05.2039

Abstract and drawing

Disclaimer: This text has been machine-scanned and may contain errors – please refer to "Publications" for legally binding content.
Metering device (1) for discharging an amount of fluid, said metering device (1) comprises: - a discharge device (13), comprising a discharge cylinder (14) and a discharge piston (5), said discharge cylinder (14) having a predefined volume, - a metering biasing member (6) acting with a biasing force on the discharge piston (5), and - the discharge device (13) is arranged to displace a predefined volume of fluid, when fluid pressure is applied, and the metering biasing member (6) allows for resetting and refilling the discharge device (13) with fluid, when the force from the fluid pressure is removed.

Publications

B1A1
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Documents

 Expand Download files (28)
Date
 Date Doc. No. Process Case number In/Out Journal description To/from
 03.02.2026 02-01 Endring av fullmektig 2026/00769 UT GH Forespørsel BRYN AARFLOT AS
 02.02.2026 01-02 Endring av fullmektig 2026/00769 INN NIPO GPOA Bossa Nova AS BRYN AARFLOT AS
 02.02.2026 01-01 Endring av fullmektig 2026/00769 INN Generell henvendelse BRYN AARFLOT AS
 06.04.2021 15-01 Saksbehandling 20190667(345081) UT PT Varsel om betaling av første årsavgift (3317) (PT20190667)
23.09.2020 14-01 Saksbehandling 20190667(345081) UT PT Registreringsbrev Nasjonal Patent (15) (PT20190667)
27.07.2020 13-01 Saksbehandling 20190667 UT PT Meddelelse om patent ACAPO AS
 10.06.2020 12-05 Saksbehandling 20190667 INN Krav ACAPO AS
 10.06.2020 12-04 Saksbehandling 20190667 INN Patenttegninger ACAPO AS
 10.06.2020 12-03 Saksbehandling 20190667 INN Beskrivelse ACAPO AS
 10.06.2020 12-02 Saksbehandling 20190667 INN Hovedbrev ACAPO AS
 10.06.2020 12-01 Saksbehandling 20190667 INN Korrespondanse (Hovedbrev inn) ACAPO AS
 21.04.2020 11-01 Saksbehandling 20190667 INN Korrespondanse (Hovedbrev inn) ACAPO AS
 24.10.2019 10-02 Saksbehandling 20190667 UT PT_report 08:28:11
24.10.2019 10-01 Saksbehandling 20190667 UT Realitet patent ACAPO AS
 04.07.2019 09-01 Saksbehandling 20190667 UT Information to inventor ACAPO AS
 03.07.2019 07-01 Saksbehandling 20190667 UT Generelt brev Patent uten frist ACAPO AS
 03.07.2019 06-01 Saksbehandling 20190667 UT Infobrev til oppfinner ACAPO AS
 25.06.2019 08-04 Saksbehandling 20190667 INN Fullmakt ACAPO AS
 25.06.2019 08-03 Saksbehandling 20190667 INN Erklæring Søkers rett til oppfinnelse ACAPO AS
 25.06.2019 08-02 Saksbehandling 20190667 INN Overdragelsesdokument ACAPO AS
 25.06.2019 08-01 Saksbehandling 20190667 INN Korrespondanse (Hovedbrev inn) ACAPO AS
 18.06.2019 05-01 Saksbehandling 20190667 UT Formalia 1 ACAPO AS
 12.06.2019 04-01 Saksbehandling 20190667 INN Korrespondanse (Hovedbrev inn) ACAPO AS
 03.06.2019 03-01 Saksbehandling 20190667 UT Formalia 1 ACAPO AS
 03.06.2019 02-01 Saksbehandling 20190667 UT Infobrev til oppfinner ACAPO AS
 24.05.2019 01-03 Saksbehandling 20190667 INN Beskrivelse ACAPO AS
 24.05.2019 01-02 Saksbehandling 20190667 INN P17652NO01 - Figurer ACAPO AS
 24.05.2019 01-01 Saksbehandling 20190667 INN Søknadsskjema Patent ACAPO 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
Field of the inventionThe present invention relates to a metering device for discharging an amount of fluid said metering device comprises a discharge device, comprising a discharge cylinder and a discharge piston, said discharge cylinder having a predefined volume being displaced when fluid pressure is applied, and a metering biasing member acting with a biasing force on the discharge piston, allowing resetting and refilling of the discharge device with fluid when the force from the fluid pressure is removed. The invention also relates to a method to supply a constant, discrete hydraulic volume using a metering device.Background of the inventionBalanced hydraulic pistons are the preferred actuation method for interval control valves (ICVs) that are used to allow or prevent flow from compartments of a subterranean reservoir completion. The balanced piston responds to differential pressure in one of two directions. Differential pressure is created by applying pressure from surface to one of two hydraulic conduits, called control lines, that connect to either side of the balanced piston. Due to the geometry of the hydraulic conduits, which can be very long and very small in diameter, it is impossible to control from the inlet side the volume that exits the downhole side of the conduit when pressure is applied and, as a result, the balanced piston will typically move the full length of travel available. The problem with full length travel is that it provides only two positions for the ICV, full open or full closed. In many applications, it has become desirable to have the ICV positioned somewhere between the full open and full closed positions; these incremental positions referred to as a percent (%) of the full open position, where the percent typically refers to the cross-sectional area of the ICV flow ports in the incremental position compared to that of the full open position. The present invention therefore addresses the problem of providing a discrete hydraulic volume output in response to a single pressure input cycle, regardless of the level of pressure and how much time that pressure input is applied, such that the ICV balanced piston does not receive enough volume to move the full travel available. The present invention allows multiple pressure input cycles, consisting of pressure applied to a minimum system functional threshold followed by relief of said applied pressure, to be provided in order to move the ICV balanced piston in multiple increments from the full closed to fully open positions. Disclosure of the state of artUS6585051B2 describes a hydraulically operated fluid metering apparatus provides discharge of a known volume of fluid to an actuator of a well tool.US7510013B2 describes a methods and systems for operating a sliding sleeve valve or other downhole well tool that is axially shiftable among a finite number of increments between two extreme configurations such as open and closed configurations.US 2010/0051289 A1 discloses systems for operating one or more sliding sleeve valves in an incremental, step-type fashion between open and closed positions, permitting the valve or valves to be choked to progressively smaller flow areas. The systems also permit the valve or valves to be fully closed without having to progress through incremental steps.WO 2010/019432 A1 discloses a hydraulic fluid metering control module in cooperation with a downhole component. The downhole component is shifted via hydraulic fluid delivered through first and/or second control lines to an actuator of the downhole component. The hydraulic fluid metering control module works in cooperation with the actuator and the control lines to enable shifting of the actuator according to a controlled, incremental process.A disadvantage found in the prior art is that the solutions and devices comprise a multitude of moving parts and that inherently increases the risk of failure.Objects of the present inventionOne object of the invention is to provide a simple and reliable fluid metering device.Another objective is to provide a new design for a fluid metering device to be used to displace a precise volume of fluid each time the fluid metering device is actuated.Yet another object is to provide a new design for a fluid metering device for activating down hole tools by displacing a precise volume of fluid every time the fluid metering device is actuated.Yet another object is to provide a simple and reliable design for a fluid metering device with as few components as possible. Yet another object is to provide a solution for operating an ICV in increments.Summary of the inventionThe above mentioned objects are attempted solved with a metering device for discharging an amount of fluid, said metering device comprises a discharge device, comprising a discharge cylinder and a discharge piston, said discharge cylinder having a predefined volume being displaced when fluid pressure is applied, and a metering biasing member acting with a biasing force on the discharge piston, allowing resetting and refilling of the discharge device with fluid when the force from the fluid pressure is removed. The metering device further comprises a metering check valve preventing flow from an inlet chamber of the discharge device to an inlet line, and a recharge shuttle inside a recharge device, slidable between a first position closing of a fluid connection between the inlet chamber and an outlet chamber of the discharge device and a second position opening up said connection, wherein the recharge shuttle comprises a piston area in fluid connection with the inlet chamber and a piston area in fluid connection with the inlet line, and a recharge biasing member acting with a force on the recharge shuttle in the opposite direction of the force from the pressure in the inlet chamber.The metering device can be connected to an ICV with an actuator, for operating of said an ICV, said discharge cylinder having a predefined volume that is fluidly connected to the ICV.An outlet line of the discharge device can be connected to the ICV actuator to open said ICV, wherein the inlet chamber is connected to said inlet line and the outlet chamber is connected to said outlet line, and the discharge piston is separating said outlet chamber from said inlet chamber and the metering biasing member is acting on said discharge piston with a force in the direction of the inlet chamber.The metering device may further comprise a bypass line with a bypass check valve allowing fluid flow from the outlet line to the inlet line.The above-mentioned objects are also attempted solved with a method to supply a constant, discrete hydraulic volume using a metering device, wherein the method comprises the steps of:- apply fluid pressure above a predefined threshold to an inlet line, - fill up an inlet chamber through a metering check valve to move a discharge piston,- pushing a predefined volume of fluid into an outlet line from an outlet chamber on the other side of discharge piston,- bleed of pressure in the inlet line reliving a backpressure on a recharge shuttle,- return the discharge piston,- move the recharge shuttle against a recharge biasing member opening up a passage between the inlet chamber and the outlet chamber, and- refill the outlet chamber with fluid from the inlet chamber.The fluid from the outlet line can evacuates to the inlet line by bypassing the metering device through a bypass check valve.Description of the figuresEmbodiments of the present invention will now be described, by way of example only, with reference to the following figures wherein:Figure 1 - 4 shows the operation of one embodiment of the invention in sequence.Figure 5-8 shows the operational sequence of another embodiment of the invention.Reference numbers:1 Metering device2 Inlet line3 Outlet line4 Outlet chamber5 Discharge piston6 Metering biasing member7 Metering check valve8 Inlet chamber9 Recharge shuttle10 Recharge biasing member11 Bypass check valve12 Recharge device13 Discharge device14 Discharge cylinder Description of preferred embodiments of the inventionFigure 1 shows one possible embodiment of the metering device 1. The metering device comprises a single inlet line 2 and a single outlet line 3, between which lies the functional components of the metering device 1.The outlet line 3 can be connected to a downhole tool such as an ICV (Inflow Control Valve) or any other down hole tool requiring hydraulic actuation. Where fluid outlet from the outlet line 3 is discharged into a hydraulic actuator on an ICV or some other downhole tool. The metering device 1 and the method can also be used for a number of applications where there is a need to supply a dose of any fluid in response to an increase in pressure. Other applications in addition to down hole tools might be compression systems, chemical dosing systems, fluid sampling, combustion system and fluid dispenser for various applications.When pressure is applied to the inlet line 2, a metering check valve 7 allows fluid to pass and the pressure acts against a piston area of a discharge piston 5. The discharge piston 5 moves in the direction of differential pressure and compresses a metering biasing member 6 until the discharge piston 5 bottoms out inside an outlet chamber 4 (Fig 2).The amount of fluid discharged out of the outlet line 3 is equal to the change in volume of the outlet chamber 4.When pressure is relieved from the inlet line 2, the metering check valve 7 closes due to higher pressure in the inlet chamber 8 compared to that of the inlet line 2.The inlet line 2 is connected to the recharge device 12 where it acts on a recharge shuttle 9 with a backpressure. When the pressure in the inlet line 2 is reduced sufficiently the differential pressure across the recharge shuttle 9 is increased so the pressure in the inlet chamber 8 can overcome the biasing force of a recharge biasing member 10. This will cause the recharge shuttle 9 to compress the recharge biasing member 10 such that the inlet chamber 8 is then connected to the outlet line 3 (Fig 3) and allows the metering biasing member 6 to return the discharge piston 5 to the starting position (Fig 4).In other words, the outlet chamber 4 is refilled with fluid from the inlet chamber 8 as the discharge piston 5 is returned by the metering biasing member 6. The recharge device 12 connects the inlet chamber 8 to the outlet chamber 4 when pressure is relieved in the inlet line 2.An optional bypass line with an optional bypass check valve 11 can be included so that anytime pressure is applied from the outlet line 3, fluid can bypass the metering device 1 to evacuate into the inlet line 2.Figure 5 -8 shows another possible embodiment of the invention where the metering check 7 is placed inside the discharge piston 5. In this embodiment the discharge piston 5 can have a T-shape with a small piston area and a large piston area. The metering check valve 7 allows fluid to flow to the inlet chamber 8. This embodiment might have an advantage for packaging a compact design.The discharge cylinder 14 and the recharge device 12 is not limited to a cylindrical shape, any design that can supply adequate fluid isolation towards a piston or a shuttle and serves the same purpose can be utilized. As an example for some applications an annular shape can be utilized. The term cylinder is however used for simplicity in both the description and in the claims.The term metering device should be interpreted broadly and can also be a choke module or part of a choke module.
Claims
Claims1. Metering device (1) for discharging an amount of fluid, said metering device (1) comprises:- a discharge device (13), comprising a discharge cylinder (14) and a discharge piston (5), said discharge cylinder (14) having a predefined volume being displaced when fluid pressure is applied,- a metering biasing member (6) acting with a biasing force on the discharge piston (5), allowing resetting and refilling of the discharge device (13) with fluid when the force from the fluid pressure is removed, characterized in that said metering device (1) further comprises- a metering check valve (7) preventing flow from an inlet chamber (8) of the discharge device (13) to an inlet line (2),- a recharge shuttle (9) inside a recharge device (12), slidable between a first position closing of a fluid connection between the inlet chamber (8) and an outlet chamber (4) of the discharge device (13) and a second position opening up said connection,- the recharge shuttle (9) comprises a piston area in fluid connection with the inlet chamber (8) and a piston area in fluid connection with the inlet line (2), and - a recharge biasing member (10) acting with a force on the recharge shuttle (9) in the opposite direction of the force from the pressure in the inlet chamber (8).2. Metering device (1) according to claim 1, wherein the metering device (1) is connected to an ICV with an actuator, for operating of said an ICV, said discharge cylinder (14) having a predefined volume that is fluidly connected to the ICV.3. Metering device (1) according to claim 2, wherein an outlet line (3) of the discharge device (13) is connected to the ICV actuator to open said ICV, the inlet chamber (8) is connected to said inlet line (2) and the outlet chamber (4) is connected to said outlet line (3), wherein the discharge piston (5) is separating said outlet chamber (4) from said inlet chamber (8) and the metering biasing member (6) is acting on said discharge piston (5) with a force in the direction of the inlet chamber (8).4. Metering device (1) according to claim 3, wherein the metering device (1) further comprises a bypass line with a bypass check valve (11) allowing fluid flow from the outlet line (3) to the inlet line (2).5. Method to supply a constant, discrete hydraulic volume using a metering device (1), characterized in that the method comprises the steps of:- apply fluid pressure above a predefined threshold to an inlet line (2),- fill up an inlet chamber (8) through a metering check valve (7) to move a discharge piston (5)- pushing a predefined volume of fluid into an outlet line (3) from an outlet chamber (4) on another side of the discharge piston (5),- bleed of pressure in the inlet line (2) reliving a backpressure on a recharge shuttle (9),- return the discharge piston (5)- move the recharge shuttle (9) against a recharge biasing member (10) opening up a passage between the inlet chamber (8) and the outlet chamber (4), and - refill the outlet chamber (4) with fluid from the inlet chamber (8).6. Method according to claim 5, wherein fluid from the outlet line (3) evacuates to the inlet line (2) by bypassing the metering device (1) through a bypass check valve (11).Patentkrav1. Måleanordning (1) for utslipp av en fluidmengde, der måleanordningen (1) omfatter:- en utslippsanordning (13), omfattende en utslippssylinder (14) og et utslippsstempel (5), der utslippssylinderen (14) har et forhåndsdefinert volum som blir fortrengt under påføring av fluidtrykk,- en måleskyvenhet (6) som virker med en skyvkraft på utslippsstempelet (5), og som tillater tilbakestilling og oppfylling av utslippsanordningen (13) med fluid under fjerning av kraften fra fluidtrykket, karakterisert ved at måleanordningen (1) videre omfatter- en måletilbakeslagsventil (7) som motvirker strømning fra et innløpskammer (8) av utslippsanordningen (13) til en innløpslinje (2),- en påfyllingsskyttel (9) innvendig i en påfyllingsanordning (12), glidbar mellom en første posisjon som avstenger en fluidforbindelse mellom innløpskammeret (8) og et utløpskammer (4) av utslippsanordningen (13) og en andre posisjon som åpner opp nevnte forbindelse,- påfyllingsskyttelen (9) omfatter et stempelareal i fluidforbindelse med innløpskammeret (8) og et stempelareal i fluidforbindelse med innløpslinjen (2), og - en påfyllingsskyvenhet (10) som virker med en kraft på påfyllingsskyttelen (9) i motsatt retning av kraften fra trykket i innløpskammeret (8).2. Måleanordning i samsvar med krav 1, karakterisert ved at måleanordningen (1) er koblet til en ICV med en aktuator, for drift av nevnte ICV, der utslippssylinderen (14) har et forhåndsdefinert volum som er fluidforbundet med nevnte ICV.3. Måleanordning i samsvar med krav 2, karakterisert ved at en utløpslinje (3) til utslippsanordningen (13) er koblet til ICV aktuatoren for å åpne nevnte ICV, der innløpskammeret (8) er koblet til innløpslinjen (2) og utløpskammeret (4) er koblet til nevnte utløpslinje (3), hvori utslippsstemplet (5) avdeler utløpskammeret (4) fra innløpskammeret (8) og måleskyvenheten (6) virker på utslippsstemplet (5) med en kraft i retningen av innløpskammeret (8).4. Måleanordning i samsvar med krav 3, karakterisert ved at måleanordningen (1) videre omfatter en omføringslinje med en omførings-tilbakeslagsventil (11) som tillater fluidstrømning fra utløpslinjen (3) til innløpslinjen (2).5. Fremgangsmåte for forsyning av et konstant, diskret hydraulisk volum ved bruk av en måleanordning (1), karakterisert ved at fremgangsmåten omfatter trinnene:- påføring av fluidtrykk over en forhåndsbestemt terskelverdi til en innløpslinje (2),- oppfylling av et innløpskammer (8) gjennom en måletilbakeslagsventil (7) for å bevege et utslippsstempel (5),- trykke et forhåndsbestemt fluidvolum inn i en utløpslinje (3) fra et utløpskammer (4) på en andre side av utslippsstemplet (5),- blø av trykk i innløpslinjen (2), som avlaster et baktrykk på en påfyllingsskyttel (9),- retur av utslippsstemplet (5),- forflytte påfyllingsskyttelen (9) mot en påfyllingsskyvenhet (10) som åpner opp en forbindelse mellom innløpskammeret (8) og utløpskammeret (4), og- påfylling av utløpskammeret (4) med fluid fra innløpskammeret (8).6. Fremgangsmåte i samsvar med krav 5, karakterisert ved at fluid fra utløpslinjen (3) evakueres til innløpslinjen (2) ved omgåing av måleanordningen (1) gjennom en omførings-tilbakeslagsventil (11).
Drawings

Priority

No priority

Patent classes

IPC classesE21B 34/10E21B 43/12G01F 11/06CPC classesE21B 34/10E21B 43/12G01F 11/06

Citations

US 2010/0051289 A1 (A1)WO 2010/019432 A1 (A1)US 2008/0000643 A1 (A1)

Applicants, owners and inventors

Owners
BOSSA NOVA AS
Storaneset 12 5260 INDRE ARNA NO (BERGEN Municipality, Vestland county)Org. number: 921884095Inventors
Anthony Kent
821 E 25th Street TX77009 HOUSTON US

Agent

BRYN AARFLOT AS
BRYN AARFLOT AS

Org. number: 979993269

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Org. number: 979993269
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