WO2023205151A1 - Valve system and method - Google Patents

Valve system and method Download PDF

Info

Publication number
WO2023205151A1
WO2023205151A1 PCT/US2023/018950 US2023018950W WO2023205151A1 WO 2023205151 A1 WO2023205151 A1 WO 2023205151A1 US 2023018950 W US2023018950 W US 2023018950W WO 2023205151 A1 WO2023205151 A1 WO 2023205151A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
control line
fluid
controller
borehole
Prior art date
Application number
PCT/US2023/018950
Other languages
French (fr)
Inventor
Dhwanikumar PATEL
Michael Andrew PALMER
Daniel SAFFORD
Original Assignee
Baker Hughes Oilfield Operations Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baker Hughes Oilfield Operations Llc filed Critical Baker Hughes Oilfield Operations Llc
Publication of WO2023205151A1 publication Critical patent/WO2023205151A1/en

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00Valve arrangements for boreholes or wells
    • E21B34/16Control means therefor being outside the borehole
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00Valve arrangements for boreholes or wells
    • E21B34/02Valve arrangements for boreholes or wells in well heads
    • E21B34/025Chokes or valves in wellheads and sub-sea wellheads for variably regulating fluid flow
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00Valve arrangements for boreholes or wells
    • E21B34/06Valve arrangements for boreholes or wells in wells
    • E21B34/10Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole

Definitions

  • An embodiment of a valve system including a hydraulic pressure actuated valve in the borehole, a first control line extending into the borehole and operatively connected to the valve, a controller at a surface location and operatively connected to the first control line, the controller configured to meter a selected volume of hydraulic fluid into the first control line to actuate the valve to a specific position.
  • An embodiment of a method for controlling inflow including metering a specific volume of actuation fluid, injecting that metered volume of fluid into a control line, and causing a valve to reposition to a specific position due to the metered volume of fluid injected thereto.
  • An embodiment of a borehole system including a borehole in a subsurface formation, a valve system operatively connected to the borehole.
  • Figure 1 is a schematic view of a valve system for a borehole as disclosed herein;
  • Figure 2 is a schematic view of components of the controller from Figure 1. DETAILED DESCRIPTION
  • FIG. 1 a schematic view of a valve system 10 for a borehole 11 in a subsurface formation 13 is illustrated.
  • the system 10 includes a valve 12, a surface located controller 14 and at least a first control line 16 connected between the controller 14 and the valve 12.
  • Controller 14 is configured to meter a specific amount of hydraulic fluid that is known to move the valve a certain distance in order to produce a specific choked condition of the valve 12. By metering the fluid, one can be assured that the valve is moved by exactly the amount desired and therefore produces exactly the degree of choke desired.
  • control line 18 there may be a second control line 18 that may be used to actuate the valve in the opposite direction or to enable the controller 14 to measure the returned fluid from the valve that was displaced upon the injection of metered fluid into the first control line 16.
  • the volumes of metered injected fluid and returned fluid may be distinct from one another due to compressibility of the actuation fluid over hundreds or thousands of feet of control line.
  • the controller 14 is configured to inject into one or more lines and to measure at one or more lines so that bidirectional control is available for all valves 12 in a particular architecture.
  • “Common Close control line”, also known as “N+l control line architecture” may be used in conjunction with the system 10 in order to operate more individual valves 12 with a reduced total number of control lines.
  • the system 10 will otherwise operate the same way as stated, with metered fluid amount being injected into a control line that is connected to a side of a valve that will cause valve movement in the desired direction, that movement being a precise movement due to the metered actuation fluid injected thereto.
  • FIG. 2 a schematic view of one arrangement for the controller 14 is illustrated.
  • the illustration identifies a number of outlets/returns 30, a metering component 32 for injecting metered actuation fluid, a measuring component 34 for measuring returned fluid, a pressure source 36, which may be a pump; and a reservoir 38 for actuation fluid, for example, a hydraulic fluid.
  • the components may all be located within the controller 14 or one or more may be located elsewhere at surface and operatively connected to the controller 14. Further, components 32 and 34 may be within the same structure 33 and may have their functions reversed. Also, in embodiments a manifold 35 may be provided that allows direction of fluid to certain ones of the outlets/returns 30.
  • a bypass 40 for actuation fluid also be included in system 10 so that in the event of difficulty with any components of controller 14, the bypass 40 may be employed to shift valves 12 downhole without the functions of the controller 14.
  • the system 10 may act upon a program or live input and may or may not utilize sensors in the downhole environment as further assistance for selecting and establishing a desired level of choke for individual valves 12.
  • Embodiment 1 A valve system including a hydraulic pressure actuated valve in the borehole, a first control line extending into the borehole and operatively connected to the valve, a controller at a surface location and operatively connected to the first control line, the controller configured to meter a selected volume of hydraulic fluid into the first control line to actuate the valve to a specific position.
  • Embodiment 2 The valve as in any prior embodiment further including a second control line connected between the controller and the valve.
  • Embodiment 3 The valve as in any prior embodiment wherein the controller is configured to measure a volume of hydraulic fluid returned from the valve.
  • Embodiment 4 The valve as in any prior embodiment wherein the controller meters a selected volume of fluid into the second control line and measures fluid returned from the valve in the first control line.
  • Embodiment 5 The system as in any prior embodiment wherein the controller is bypassable at surface to contingency actuate the valve.
  • Embodiment 6 The system as in any prior embodiment wherein the actuation is to full open or full closed.
  • Embodiment 7 The system as in any prior embodiment wherein the controller includes a manifold.
  • Embodiment 8 The system as in any prior embodiment wherein the manifold is connected to a number of control lines extending to one or more valves each.
  • Embodiment 9 The system as in any prior embodiment wherein the controller includes a first metering configuration to measure the selected volume of fluid to be released into the first control line.
  • Embodiment 10 The system as in any prior embodiment wherein the second control line is operative to actuate the valve in a direction opposite the direction of actuation of the first control line.
  • Embodiment 11 The system as in any prior embodiment wherein the controller includes a second metering configuration to measure a selected volume of fluid to be released into the second control line.
  • Embodiment 12 The system as in any prior embodiment wherein the first metering configuration and second metering configuration are the same structure.
  • Embodiment 13 A method for controlling inflow including metering a specific volume of actuation fluid, injecting that metered volume of fluid into a control line, and causing a valve to reposition to a specific position due to the metered volume of fluid injected thereto.
  • Embodiment 14 The method as in any prior embodiment further including measuring actuation fluid returned from the valve due to injected fluid into the valve.
  • Embodiment 15 The method as in any prior embodiment wherein the specific position is a choked position.
  • Embodiment 16 A borehole system including a borehole in a subsurface formation, a valve system as in any prior embodiment operatively connected to the borehole.
  • the teachings of the present disclosure may be used in a variety of well operations. These operations may involve using one or more treatment agents to treat a formation, the fluids resident in a formation, a borehole, and / or equipment in the borehole, such as production tubing.
  • the treatment agents may be in the form of liquids, gases, solids, semi-solids, and mixtures thereof.
  • Illustrative treatment agents include, but are not limited to, fracturing fluids, acids, steam, water, brine, anti-corrosion agents, cement, permeability modifiers, drilling muds, emulsifiers, demulsifiers, tracers, flow improvers etc.
  • Illustrative well operations include, but are not limited to, hydraulic fracturing, stimulation, tracer injection, cleaning, acidizing, steam injection, water flooding, cementing, etc.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Lift Valve (AREA)
  • Pipeline Systems (AREA)

Abstract

A valve system including a hydraulic pressure actuated valve in the borehole, a first control line extending into the borehole and operatively connected to the valve, a controller at a surface location and operatively connected to the first control line, the controller configured to meter a selected volume of hydraulic fluid into the first control line to actuate the valve to a specific position. A method for controlling inflow including metering a specific volume of actuation fluid, injecting that metered volume of fluid into a control line, and causing a valve to reposition to a specific position due to the metered volume of fluid injected thereto. A borehole system including a borehole in a subsurface formation, a valve system operatively connected to the borehole.

Description

VALVE SYSTEM AND METHOD
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of U.S. Application No. 17/727240, filed on April 22, 2022, which is incorporated herein by reference in its entirety.
BACKGROUND
[0002] In the resource recovery industry and fluid sequestration industry there is interest in operating valves in the downhole environment to various conditions of choke. Commonly a choke control device is run in the hole along with or at least near the valve to be controlled. While the configuration works, it is costly to run and the art would well receive more efficient alternatives.
SUMMARY
[0003] An embodiment of a valve system including a hydraulic pressure actuated valve in the borehole, a first control line extending into the borehole and operatively connected to the valve, a controller at a surface location and operatively connected to the first control line, the controller configured to meter a selected volume of hydraulic fluid into the first control line to actuate the valve to a specific position.
[0004] An embodiment of a method for controlling inflow including metering a specific volume of actuation fluid, injecting that metered volume of fluid into a control line, and causing a valve to reposition to a specific position due to the metered volume of fluid injected thereto.
[0005] An embodiment of a borehole system including a borehole in a subsurface formation, a valve system operatively connected to the borehole.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] The following descriptions should not be considered limiting in any way. With reference to the accompanying drawings, like elements are numbered alike:
[0007] Figure 1 is a schematic view of a valve system for a borehole as disclosed herein; and
[0008] Figure 2 is a schematic view of components of the controller from Figure 1. DETAILED DESCRIPTION
[0009] A detailed description of one or more embodiments of the disclosed apparatus and method are presented herein by way of exemplification and not limitation with reference to the Figures.
[0010] Referring to Figure 1, a schematic view of a valve system 10 for a borehole 11 in a subsurface formation 13 is illustrated. The system 10 includes a valve 12, a surface located controller 14 and at least a first control line 16 connected between the controller 14 and the valve 12. Controller 14 is configured to meter a specific amount of hydraulic fluid that is known to move the valve a certain distance in order to produce a specific choked condition of the valve 12. By metering the fluid, one can be assured that the valve is moved by exactly the amount desired and therefore produces exactly the degree of choke desired. Additionally, there may be a second control line 18 that may be used to actuate the valve in the opposite direction or to enable the controller 14 to measure the returned fluid from the valve that was displaced upon the injection of metered fluid into the first control line 16. The volumes of metered injected fluid and returned fluid may be distinct from one another due to compressibility of the actuation fluid over hundreds or thousands of feet of control line. The controller 14 is configured to inject into one or more lines and to measure at one or more lines so that bidirectional control is available for all valves 12 in a particular architecture. Further, it is contemplated that “Common Close control line”, also known as “N+l control line architecture” may be used in conjunction with the system 10 in order to operate more individual valves 12 with a reduced total number of control lines. The system 10 will otherwise operate the same way as stated, with metered fluid amount being injected into a control line that is connected to a side of a valve that will cause valve movement in the desired direction, that movement being a precise movement due to the metered actuation fluid injected thereto.
[0011] Referring to Figure 2, a schematic view of one arrangement for the controller 14 is illustrated. The illustration identifies a number of outlets/returns 30, a metering component 32 for injecting metered actuation fluid, a measuring component 34 for measuring returned fluid, a pressure source 36, which may be a pump; and a reservoir 38 for actuation fluid, for example, a hydraulic fluid. The components may all be located within the controller 14 or one or more may be located elsewhere at surface and operatively connected to the controller 14. Further, components 32 and 34 may be within the same structure 33 and may have their functions reversed. Also, in embodiments a manifold 35 may be provided that allows direction of fluid to certain ones of the outlets/returns 30. [0012] It is also contemplated that a bypass 40 for actuation fluid also be included in system 10 so that in the event of difficulty with any components of controller 14, the bypass 40 may be employed to shift valves 12 downhole without the functions of the controller 14.
[0013] In use, the system 10 may act upon a program or live input and may or may not utilize sensors in the downhole environment as further assistance for selecting and establishing a desired level of choke for individual valves 12.
[0014] Set forth below are some embodiments of the foregoing disclosure:
[0015] Embodiment 1: A valve system including a hydraulic pressure actuated valve in the borehole, a first control line extending into the borehole and operatively connected to the valve, a controller at a surface location and operatively connected to the first control line, the controller configured to meter a selected volume of hydraulic fluid into the first control line to actuate the valve to a specific position.
[0016] Embodiment 2: The valve as in any prior embodiment further including a second control line connected between the controller and the valve.
[0017] Embodiment 3: The valve as in any prior embodiment wherein the controller is configured to measure a volume of hydraulic fluid returned from the valve.
[0018] Embodiment 4: The valve as in any prior embodiment wherein the controller meters a selected volume of fluid into the second control line and measures fluid returned from the valve in the first control line.
[0019] Embodiment 5: The system as in any prior embodiment wherein the controller is bypassable at surface to contingency actuate the valve.
[0020] Embodiment 6: The system as in any prior embodiment wherein the actuation is to full open or full closed.
[0021] Embodiment 7: The system as in any prior embodiment wherein the controller includes a manifold.
[0022] Embodiment 8: The system as in any prior embodiment wherein the manifold is connected to a number of control lines extending to one or more valves each.
[0023] Embodiment 9: The system as in any prior embodiment wherein the controller includes a first metering configuration to measure the selected volume of fluid to be released into the first control line.
[0024] Embodiment 10: The system as in any prior embodiment wherein the second control line is operative to actuate the valve in a direction opposite the direction of actuation of the first control line. [0025] Embodiment 11 : The system as in any prior embodiment wherein the controller includes a second metering configuration to measure a selected volume of fluid to be released into the second control line.
[0026] Embodiment 12: The system as in any prior embodiment wherein the first metering configuration and second metering configuration are the same structure.
[0027] Embodiment 13: A method for controlling inflow including metering a specific volume of actuation fluid, injecting that metered volume of fluid into a control line, and causing a valve to reposition to a specific position due to the metered volume of fluid injected thereto.
[0028] Embodiment 14: The method as in any prior embodiment further including measuring actuation fluid returned from the valve due to injected fluid into the valve.
[0029] Embodiment 15: The method as in any prior embodiment wherein the specific position is a choked position.
[0030] Embodiment 16: A borehole system including a borehole in a subsurface formation, a valve system as in any prior embodiment operatively connected to the borehole.
[0031] The use of the terms “a” and “an” and “the” and similar referents in the context of describing the invention (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. Further, it should be noted that the terms “first,” “second,” and the like herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The terms “about”, “substantially” and “generally” are intended to include the degree of error associated with measurement of the particular quantity based upon the equipment available at the time of filing the application. For example, “about” and/or “substantially” and/or “generally” can include a range of ± 8% or 5%, or 2% of a given value.
[0032] The teachings of the present disclosure may be used in a variety of well operations. These operations may involve using one or more treatment agents to treat a formation, the fluids resident in a formation, a borehole, and / or equipment in the borehole, such as production tubing. The treatment agents may be in the form of liquids, gases, solids, semi-solids, and mixtures thereof. Illustrative treatment agents include, but are not limited to, fracturing fluids, acids, steam, water, brine, anti-corrosion agents, cement, permeability modifiers, drilling muds, emulsifiers, demulsifiers, tracers, flow improvers etc. Illustrative well operations include, but are not limited to, hydraulic fracturing, stimulation, tracer injection, cleaning, acidizing, steam injection, water flooding, cementing, etc. [0033] While the invention has been described with reference to an exemplary embodiment or embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the claims. Also, in the drawings and the description, there have been disclosed exemplary embodiments of the invention and, although specific terms may have been employed, they are unless otherwise stated used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention therefore not being so limited.

Claims

What is claimed is:
1. A valve system (10), characterized by: a hydraulic pressure actuated valve (12) in the borehole (11); a first control line (16) extending into the borehole (11) and operatively connected to the valve (12); a controller (14) at a surface location and operatively connected to the first control line (16), the controller (14) configured to meter a selected volume of hydraulic fluid into the first control line (16) to actuate the valve (12) to a specific position.
2. The valve (12) as claimed in claim 1 further including a second control line (18) connected between the controller (14) and the valve (12).
3. The valve (12) as claimed in claim 2 wherein the controller (14) is configured to measure a volume of hydraulic fluid returned from the valve (12).
4. The valve (12) as claimed in claim 2 wherein the controller (14) meters a selected volume of fluid into the second control line (18) and measures fluid returned from the valve (12) in the first control line (16).
5. The system (10) as claimed in claim 1 wherein the controller (14) is bypassable at surface to contingency actuate the valve (12).
6. The system (10) as claimed in claim 1 wherein the controller (14) includes a manifold (35).
7. The system (10) as claimed in claim 6 wherein the manifold (35) is connected to a number of control lines (16, 18) extending to one or more valves (12) each.
8. The system (10) as claimed in claim 1 wherein the controller (14) includes a first metering configuration (32) to measure the selected volume of fluid to be released into the first control line (16).
9. The system (10) as claimed in claim 2 wherein the second control line (18) is operative to actuate the valve (12) in a direction opposite the direction of actuation of the first control line (16).
10. The system (10) as claimed in claim 9 wherein the controller (14) includes a second metering configuration (32) to measure a selected volume of fluid to be released into the second control line (18).
11. The system (10) as claimed in claim 6 wherein the first metering configuration (32) and second metering configuration (32) are the same structure.
12. A method for controlling inflow characterized by: metering a specific volume of actuation fluid; injecting that metered volume of fluid into a control line (14); and causing a valve (12) to reposition to a specific position due to the metered volume of fluid injected thereto.
13. The method as claimed in claim 12 further including measuring actuation fluid returned from the valve (12) due to injected fluid into the valve (12).
14. The method as claimed in claim 12 wherein the specific position is a choked position.
15. A borehole system characterized by: a borehole (11) in a subsurface formation (13); a valve system (10) as claimed in claim 1 operatively connected to the borehole (11).
PCT/US2023/018950 2022-04-22 2023-04-18 Valve system and method WO2023205151A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17/727,240 US20230340858A1 (en) 2022-04-22 2022-04-22 Valve system and method
US17/727,240 2022-04-22

Publications (1)

Publication Number Publication Date
WO2023205151A1 true WO2023205151A1 (en) 2023-10-26

Family

ID=88416065

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2023/018950 WO2023205151A1 (en) 2022-04-22 2023-04-18 Valve system and method

Country Status (2)

Country Link
US (1) US20230340858A1 (en)
WO (1) WO2023205151A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476893A (en) * 1980-07-04 1984-10-16 Barmag Barmer Maschinenfabrik Ag Hydraulic flow control valve
JP2001322556A (en) * 2000-05-12 2001-11-20 Eaton Corp Fluid controller
US20020029883A1 (en) * 2000-01-24 2002-03-14 Vinegar Harold J. System and method for fluid flow optimization
US20030132006A1 (en) * 2001-10-30 2003-07-17 Baker Hughes Incorporated Method and system for controlling a downhole flow control device using derived feedback control
US20070163774A1 (en) * 2006-01-13 2007-07-19 Schlumberger Technology Corporation Flow Control System for Use in a Well

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4545406A (en) * 1980-12-31 1985-10-08 Flo-Con Systems, Inc. Valve position indicator and method
US6269641B1 (en) * 1999-12-29 2001-08-07 Agip Oil Us L.L.C. Stroke control tool for subterranean well hydraulic actuator assembly
EP1977076B1 (en) * 2006-01-24 2017-11-15 Welldynamics, Inc. Positional control of downhole actuators
US20100051289A1 (en) * 2008-08-26 2010-03-04 Baker Hughes Incorporated System for Selective Incremental Closing of a Hydraulic Downhole Choking Valve
EP2480754A4 (en) * 2009-09-22 2016-05-11 Services Petroliers Schlumberger Inflow control device and methods for using same
US10787900B2 (en) * 2013-11-26 2020-09-29 Weatherford Technology Holdings, Llc Differential pressure indicator for downhole isolation valve
WO2018226225A1 (en) * 2017-06-08 2018-12-13 Schlumberger Technology Corporation Hydraulic indexing system
US20230151906A1 (en) * 2021-11-17 2023-05-18 Saudi Arabian Oil Company Sub-surface safety valve (sssv) advisory system-autonomous sssv troubleshooting device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476893A (en) * 1980-07-04 1984-10-16 Barmag Barmer Maschinenfabrik Ag Hydraulic flow control valve
US20020029883A1 (en) * 2000-01-24 2002-03-14 Vinegar Harold J. System and method for fluid flow optimization
JP2001322556A (en) * 2000-05-12 2001-11-20 Eaton Corp Fluid controller
US20030132006A1 (en) * 2001-10-30 2003-07-17 Baker Hughes Incorporated Method and system for controlling a downhole flow control device using derived feedback control
US20070163774A1 (en) * 2006-01-13 2007-07-19 Schlumberger Technology Corporation Flow Control System for Use in a Well

Also Published As

Publication number Publication date
US20230340858A1 (en) 2023-10-26

Similar Documents

Publication Publication Date Title
CA3076892C (en) Ball drop two stage valve
EP3262281B1 (en) Petroleum well tracer release flow shunt chamber
US20190292881A1 (en) Method for scale treatment optimization
US10428622B2 (en) Force multiplyer used to actuate a ball valve
WO2017065912A1 (en) A flow control and injection arrangement and method
US20230340858A1 (en) Valve system and method
US11299945B2 (en) Counter and system with counter
US20180283145A1 (en) Method and system for gravel packing a borehole
AU2020285534B2 (en) Injection valve arrangement with switched bypass and method
CA3130424C (en) Artificial lift system for a resource exploration and recovery system
US20180283135A1 (en) Fluid loss valve and packer assembly
US10767429B2 (en) Plug bypass tool and method
US11401787B2 (en) Systems and methods to chemically liven dead wells
CN109072687A (en) PH sensitive chemicals product for downhole fluid sensing and with ground communication
NO20230709A1 (en) Wellbore having opposing action valvular conduits
AU2022381066A1 (en) Convertible gauge module and system
WO2022170337A1 (en) Flow regulation tool
WO2019240869A1 (en) Mobile chemical injection configuration
Eichhober Implementation of the Capillary String Technology in RAG Gas Fields to Improve Production from Liquid Loaded Wells
UA70893A (en) Process of returning the associated stratal water process of returning the associated stratal water to the subsurface to the subsurface

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23792425

Country of ref document: EP

Kind code of ref document: A1