Side bag chuck with recoverable redundant electric gas lift valve

Description

1 / 13 Side pocket chuck with redundant, recoverable electric gas lift valve. RELATED DEPOSIT REQUESTS

[0001] This application claims the benefit of U.S. Patent Application No. 18 / 136,796, filed April 19, 2023, entitled Side Pocket Mandrel with Retrievable Redundant Electric Gas Lift Valve, disclosure of which is incorporated herein by reference. FIELD OF THE INVENTION

[0002] This invention relates generally to the field of oil and gas production and, more particularly, to a gas lift system incorporating an enhanced gas lift module. BACKGROUND

[0003] Gas lift is a technique in which pressurized gaseous fluids are used to reduce the density of the produced fluids to allow formation pressure to push the less dense mixture to the surface. In annular-space-to-pipe systems, pressurized gases are injected from the surface into the annular space, where the pressurized gases enter the production pipe string through a series of gas lift valves. Alternatively, in pipe-to-annular-space systems, pressurized gases are injected into the production pipe string and discharged into the annular space, where the gases help produce fluids out of the annular space.

[0004] Gas lift valves can be configured to open automatically when the pressure gradient between the annulus and the production tubing exceeds the closing force that keeps each gas lift valve in a closed position. In most installations, each of the gas lift mandrels within the gas lift system is deployed above a plug or other zone isolation device to ensure that liquids and fluids from an oil well do not interfere with Petition 870250092962, dated 10 / 10 / 2025, page 12 / 122 2 / 13 Operation of the gas lift valve. Increasing the pressure in the annulus above the obturator will force the gas lift valves to open at a pressure limit, thus injecting pressurized gases into the production pipeline or annular space.

[0005] To allow unimpeded production of oil well fluids through the production tubing, gas lift valves are housed within side-pocketed mandrels that include a valve compartment that is offset laterally from the production tubing. Because the gas lift valves are contained within these side-offset valve compartments, tools can be deployed and retrieved through the open main passage of the side-pocketed mandrel. The predetermined position of the gas lift valves within the production tubing string controls the gas entry points into the production string.

[0006] A common problem in gas lift completions is managing the interventions needed to accommodate unforeseen well operations. For example, during packer adjustments and tubing testing by increasing pressure within the annular space, blind valves are typically installed within the side-pocket mandrels to prevent fluid flow from the annular space completion into the production tubing, or from the production tubing into the annular space. Once the packers are adjusted, the blind valves are replaced with gas lift valves that allow flow into the production tubing from the annular space. As another example, when well unloading is necessary, the gas lift valves must be closed as the well fluid level decreases to prevent gas within the annular space from escaping through an open gas lift valve.This requires operators to plan the discharge sequence and valve parameters for a specific well based on a set of assumed production parameters within the well. Because the operation of gas lift valves cannot be easily adjusted after installation, typical gas lift systems do not. Petition 870250092962, dated 10 / 10 / 2025, page 13 / 122 3 / 13 can be easily adapted to change production parameters within the well.

[0007] Furthermore, there is a growing market for electric completions and a desire to electrify gas lift systems, with an option to continue using traditional gas lift valves that can be recovered using conventional wire rope-based systems. There is therefore a need for an improved gas lift system that overcomes the shortcomings of the previous technique. SUMMARY OF THE INVENTION

[0008] In some embodiments, the present disclosure is directed to a side-pocket mandrel for use within a gas lift system that has been deployed in a well that has an annulus surrounding the gas lift system. The side-pocket mandrel includes a central body that includes a central bore, a valve pocket that is offset relative to the central body and the central bore, a pneumatic gas lift valve installed within the valve pocket, and an electric gas lift valve installed within the valve pocket. The electric gas lift valve and the pneumatic gas lift valve are both recoverable using wire rope-based tools.

[0009] In another embodiment, the present disclosure is directed to a side-pocket mandrel for use within a gas lift system that has been deployed in a well that has an annulus surrounding the gas lift system. The side-pocket mandrel has a central body that includes a central bore and a valve pocket that is offset relative to the central body and the central bore. The valve pocket includes a power connection point in the valve pocket that is configured to provide an electrical connection to the electric gas lift valve. A conductor connected to the power connection point provides a source of electrical power. The side-pocket mandrel includes a pneumatic gas lift valve installed within the valve pocket and an electric gas lift valve installed within the valve pocket. The electric gas lift valve and the pneumatic gas lift valve are aligned. Petition 870250092962, dated 10 / 10 / 2025, page 14 / 122 4 / 13 linearly at the valve seat. The electric gas lift valve is connected to the power connection point and is recoverable using a wire rope-based tool without removing the side pocket mandrel from the well.

[0010] In other embodiments, the present disclosure is directed to a side-pocket mandrel for use in a gas lift system deployed in a well that has a ring around the gas lift system. The side-pocket mandrel has a central body that includes a central bore, a first valve pocket that is offset relative to the central body, and a second valve pocket that is offset relative to the central body. The second valve pocket is arranged in a side-by-side relationship with the first valve pocket. The first valve pocket includes a power connection point in the valve pocket that is configured to provide an electrical connection to the electric gas lift valve. A conductor is connected to the power connection point to provide electrical power to the power connection point.The side-bolt chuck includes an electric gas lift valve connected to the power connection point inside the first valve pocket and a pneumatic gas lift valve installed inside the second valve pocket. Both the electric gas lift valve and the pneumatic gas lift valve are recoverable using wire rope-based tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a side view of a gas lift system installed in a conventional well.

[0012] Figures 2A to 2C are a partial side cross-sectional view of a side pocket mandrel constructed according to a first embodiment of the invention.

[0013] Figures 3A to 3C are partial side cross-sectional views of a side pocket mandrel constructed according to a second embodiment of the invention.

[0014] Figures 4A to 4C are partial side cross-sectional views of a side pocket mandrel constructed according to a third embodiment of the invention. Petition 870250092962, dated 10 / 10 / 2025, p. 15 / 122 5 / 13 WRITTEN DESCRIPTION

[0015] As used herein, the term petroleum refers broadly to all mineral hydrocarbons, such as crude oil, gas, and oil-gas combinations. The term fluid refers generically to gases and liquids, and two-phase or multiphase refers to a fluid that includes a mixture of gases and liquids. Upstream and downstream can be used as positional references based on the movement of a fluid flow from an upstream position in the well to a downstream position at the surface. Although embodiments of the present invention can be described in connection with a conventional well that is substantially vertically oriented, it will be recognized that the embodiments may also find utility in horizontal, deviated, or unconventional wells. References to lateral positions should be interpreted as displaced laterally from an axis or component extending in a substantially vertical orientation.

[0016] With respect to Figure 1, a gas lift system 100 is shown in a well 102. Well 102 includes a casing 104 and a series of boreholes 106 that admit oil well fluids from a production geological formation 108 through the casing 104 into the well 102. An annulus 110 is formed between the gas lift system 100 and the casing 104. The gas lift system 100 is connected to the production tubing 112 which carries oil well fluids from the formation 108, through the gas lift system 100, to the wellhead 114 at the surface.

[0017] The gas lift system 100 includes one or more gas lift modules 116. Each gas lift module 116 includes a side-chambered mandrel 118, which can be connected to a short tube 120. An inlet tube 122 extends through one or more packers 124 into a lower wellbore zone 102 nearest to the boreholes 106. In this way, the produced fluids are transported through the inlet tube 122 to the lower (upstream) gas lift module 116. The produced fluids are transported through the system Petition 870250092962, dated 10 / 10 / 2025, p. 16 / 122 6 / 13 of gas lift 100 and production pipeline 112, which transports the produced fluids through the wellhead 114 to the surface storage or processing facilities.

[0018] According to well-established gas lift principles, pressurized fluids or gases are injected from a gas source 200 at the surface into the annulus 110 surrounding the gas lift system 100. The gas lift modules 116 controllably admit the pressurized gases into the production tubing 112 through the side pocket mandrel 118. The pressurized gases combine with the fluids produced in the gas lift modules 116 to reduce the overall fluid density, which facilitates the recovery of the produced fluids from the well 102. The gas lift system 100 can be useful in recovering liquid and multiphase hydrocarbons, as well as for discharging water-based fluids out of the well 102.

[0019] Returning to figures 2A to 4C, the same lateral and partial cross-sectional views of the gas lift module 116 constructed according to various embodiments are shown. Figures 2A, 3A and 4A show side views of the side pocket chuck 118. Figures 2B, 3B and 4B show partial cutaway views of the side pocket chuck 118 rotated 90 degrees from the side pocket chuck 118 shown in figures 2A, 3A and 4A. Figures 2C, 3C and 4C show partial cutaway views of the side pocket chucks 118 shown in figures 2A, 3A and 4A. Except as indicated, the components and characteristics of the side pocket chucks 118 shown in figures 2A-4C are the same.

[0020] In each case, the side pocket mandrel 118 includes a central body 126 and a valve pocket 128 within the side pocket mandrel 118. The central body 126 includes a central bore 130. The valve pocket 128 is offset laterally and separated from the central bore 130, which extends in a substantially collinear manner with the production piping 112. An external port 134 provides a path from the annular 110 to the valve pocket 128. A port Petition 870250092962, dated 10 / 10 / 2025, page 17 / 122 7 / 13 internal 136 provides a path from the valve bag 128 to the center hole 130 of the side bag mandrel 118.

[0021] The valve bag 128 contains a conventional pneumatic gas lift valve 138 and an electric gas lift valve 140. The pneumatic gas lift valve 138 is configured to be installed and retrieved using conventional wire rope and kickover tools. The pneumatic gas lift valve 138 is configured to be actuated from open to closed positions in response to a sufficient pressure gradient. When the pressure gradient between an inlet and an outlet of the pneumatic gas lift valve 138 exceeds the closing force of the pneumatic gas lift valve 138, gas is admitted through the pneumatic gas lift valve 138, in accordance with conventional gas lift valve mechanisms.

[0022] The electric gas lift valve 140 is connected to a suitable conductor 142 via a power connection point 144 installed in the valve pocket 128. The conductor 142 may be a pipe-encapsulated conductor line (TEC) that is configured to provide power and surface control signals to the electric gas lift valve 140. The power connection point 144 may include a plug or socket that connects to a pairing feature on the electric gas lift valve 140. The power connection point 144 is designed to facilitate connection and disconnection of the electric gas lift valve 140 from the side pocket mandrel 118 while the side pocket mandrel 118 remains in the well 102. Like the pneumatic gas lift valve 138, the electric gas lift valve 140 is also configured to be installed and retrieved using conventional wire rope tools, such as a kickover tool.Since the electric gas lift valve 140 is recoverable, it can be replaced or repaired without removing the side bag mandrel 118 from well 102.

[0023] The 140 electric gas lift valve can be operated in any position from fully closed to fully open to control the flow and rate of gases through the 140 electric gas lift valve. In Petition 870250092962, dated 10 / 10 / 2025, page 18 / 122 8 / 13 In some embodiments, the electric gas lift valve 140 includes an internal valve element 146 that controls the passage of fluid through the electric gas lift valve 140. The valve element 146 is actuated by a motorized actuator 148 that is in electrical communication with the power connection point 144. In some embodiments, the actuator 148 is a linear actuator that moves the valve element 146 into and out of a valve seat 150. In other embodiments, the actuator 148 is a rotary actuator that rotates the valve element 146 into or out of alignment with passages extending through the valve seat 150.

[0024] The actuator 148 operates in response to a command signal carried by the conductor 142 from the surface or other downhole equipment using standard downhole communication protocols and modes, including wireless RF, acoustic (pressure pulse), and wired. In exemplary embodiments, the gas lift system 100 includes a plurality of gas lift modules 116, each of which includes an electric gas lift valve 140 that can be controlled independently of the other electric gas lift valves 140 within the gas lift system 100. This allows the operator to selectively place one or more of the plurality of gas lift modules 116 in an open state while maintaining other gas lift modules 116 in a closed state.

[0025] In Figures 2A to 2C, the side pocket mandrel 118 includes an elongated valve pocket 128 that is designed to contain both the electric gas lift valve 140 and the pneumatic lift valve 138 arranged in a linear end-to-end relationship. In the embodiment shown in Figures 2B and 2C, the electric gas lift valve 140 is positioned below (at the bottom of the well) the pneumatic gas lift valve 138. The side pocket mandrel 118 includes a side passage 152 that runs alongside and adjacent to one or both sides of the valve pocket 128. The side passage 152 includes one or more inlets 154 and one or more outlets 156. The inlets 154 provide a path for the discharge from the electric gas lift valve 140 in the valve pocket 128 to the side passage 152. The outlets 156 provide a Petition 870250092962, dated 10 / 10 / 2025, p. 19 / 122 9 / 13 trajectory of the side passage 152 back to the valve bag 128 adjacent to the inlet for the pneumatic gas lift valve 138.

[0026] In this way, the gas from the annular space 110 enters the valve pocket 128 through the outer port 134, where it passes through the electric gas lift valve 140 when the electric gas lift valve 140 is not in the closed position. The gas is discharged from the open electric gas lift valve 140 to the valve pocket 128, where it is forced into the side passage 152. The gas returns from the side passage 152 to the valve pocket 128 adjacent to the pneumatic gas lift valve 138. If the pressure gradient across the pneumatic gas lift valve 138 is sufficiently high, the pneumatic gas lift valve 138 will open and the gas will pass through the pneumatic gas lift valve 138 before entering the central bore 130 through the inner port 136.In this configuration, the electric gas lift valve 140 acts as a controllable throttle that can be used to block or allow the flow of gases to the valve bag 128 through the external port 134.

[0027] During a retrieval operation, the pneumatic gas lift valve 138 is removed first using a wire rope-based tool. Once the pneumatic gas lift valve 138 has been removed, the electric gas lift valve 140 can be retrieved from the valve pocket 128 using a wire rope-based tool. The installation process is performed in reverse order. The electric gas lift valve 140 is installed in the valve pocket 128 with a wire rope-based tool before the pneumatic gas lift valve 138 is installed in the valve pocket 128 above the electric gas lift valve 140.

[0028] In the embodiment shown in Figures 3A to 3C, the valve pocket 128 is separated by a divider 158 into first and second valve pockets 128a, 128b (as best illustrated in Figure 3B). The divider 158 includes a through passage 160 connecting the first and second valve pockets 128a, 128b. The electric gas lift valve 140 and the power connection point 144 are Petition 870250092962, dated 10 / 10 / 2025, page 20 / 122 10 / 13 located in the first valve pocket 128a while the pneumatic gas lift valve 138 is located in the second valve pocket 128b. In this configuration, the pneumatic gas lift valve 138 and the electric gas lift valve 140 are oriented in a side-by-side configuration which also allows for the retrieval and installation of the pneumatic gas lift valve 138 and the electric gas lift valve 140 using conventional wire rope-based tools.

[0029] The outer port 134 intercepts the first valve pocket 128a and the inner port 136 places the second valve pocket 128b in fluid communication with the central bore 130. In this configuration, the electric gas lift valve 140 controllably regulates the gas flow from the annulus 110 through the first valve pocket 128a to the bypass passage 160, where the gas is injected into the second valve pocket 128b. If the gas pressure in the second valve pocket 128b is sufficiently high, the pneumatic gas lift valve 138 will open to allow pressurized gas to pass through the pneumatic gas lift valve 138 to the central bore 130 via the inner port 136 or an open end of the second valve pocket 128b.

[0030] Returning to figures 4A to 4C, an embodiment is shown in which the electric gas lift valve 140 is located above the pneumatic gas lift valve 138. In this embodiment, the side pocket mandrel 118 includes first and second valve pockets 128a, 128b, which are arranged linearly with the first valve pocket 128a located at an upper end of the side pocket mandrel 118 and the second valve pocket 128b located at a lower end of the side pocket mandrel 118. The first and second valve pockets 128a, 128b are connected to each other by the side passage 152.

[0031] In some embodiments, the electric gas lift valve 140 is fixed to the first valve pocket 128a and the pneumatic gas lift valve 138 is fixed to the second valve pocket 128b (as shown in Figures 4B to 4C). In this configuration, the electric gas lift valve Petition 870250092962, dated 10 / 10 / 2025, page 21 / 122 11 / 13 140 controls the passage of gas from the annular space 110 to the valve pocket 128a and the side passage 152, while the pneumatic gas lift valve 138 provides redundant access from the valve pocket 128b to the production piping 112. During use, gas enters the first valve pocket 128a through the outer port 134. If the electric gas lift valve 140 is not in the closed position, the gas passes through the electric gas lift valve 140 to the side passage 152, before entering the lower end of the second valve pocket 128b. If the gas pressure is sufficiently high, the pneumatic gas lift valve 138 opens and allows the pressurized gas to pass through the pneumatic gas lift valve 138 to the center hole 130 in an upward and forward flow direction.In this embodiment, the pneumatic gas lift valve 138 and the electric gas lift valve 140 can each be recovered or installed using a kickover tool or other wire rope-based tools.

[0032] Although the embodiments represented in Figures 2A to 2C have been illustrated and described in connection with an annular space-to-pipeline system, the same embodiment can also be used in connection with a pipe-to-annular space system in which pressurized gas is injected into the production pipe 112 and discharged through the gas lift module 116 into the annular space 110.

[0033] The ability to selectively activate and deactivate the electric gas lift valve 140 significantly improves the versatility of the gas lift system 100, allowing the operator to respond to a condition where it is desirable to prevent fluid flow between the valve compartment 128 and the center bore 130. For example, while well 102 is being discharged of excess fluid in the annulus 110, the electric gas lift valve 140 can be activated to selectively deactivate the pneumatic gas lift valve 138 in a gas lift module 116 that is no longer below the liquid level in the annulus 110. Without the ability to selectively disable the gas lift valve 138 within the gas lift module 116, pressure within the annulus 110 would tend to escape. Petition 870250092962, dated 10 / 10 / 2025, page 22 / 122 12 / 13 via the dry gas lift module 116, thus decreasing the efficiency of the unloading operation. Therefore, the electric gas lift valve 140 allows the operator to open only those gas lift modules 116 that are useful for unloading well 102.

[0034] Furthermore, the electric gas lift valve 140 allows selective isolation of the pneumatic gas lift valve 138 from the annular space 110 with an on-demand electrical system, while allowing recovery and installation of the pneumatic gas lift valve 138 and the electric gas lift valve 140 using conventional wire rope-based tools (including standard kickover tools). In this way, the embodiments disclosed in this document can be configured for use in a method for maintaining the gas lift system 100 by actuating the electric gas lift valve 140 in the side pocket chuck 118 to isolate the pneumatic gas lift valve 138 from the annulus 110 and then removing the pneumatic gas lift valve 138 with a wire rope-based tool.The method may also include installing a second gas lift valve in the valve pocket 128 with a wire rope-based tool before placing the electric gas lift valve 140 in an open state to communicate fluid from the annulus 110 to the newly installed gas lift valve.

[0035] Thus, in exemplary embodiments, the side pocket chuck 118 includes a pneumatic gas lift valve 138 and an electric gas lift valve 140 which may be arranged within the side pocket chuck 118 in linear end-to-end relationships or parallel side-by-side relationships. The pneumatic gas lift valve 138 and the electric gas lift valve 140 may be configured to operate in a redundant manner in which the gas must flow through the pneumatic gas lift valve 138 and the electric gas lift valve 140 before entering the center hole 130. The pneumatic gas lift valve 138 and the electric gas lift valve 140 may also be configured to operate in a parallel manner in which the gas may reach the center hole 130 by flowing through one or both of the Petition 870250092962, dated 10 / 10 / 2025, page 23 / 122 13 / 13 pneumatic gas lift valves 138 and electric gas lift valve 140. It is important to note that the pneumatic gas lift valve 138 and the electric gas lift valve 140 can be recovered and installed using conventional wire rope tools. The electric gas lift valve 140 is configured to be easily connected to the side pocket chuck 118 via a connection to the power connection point 144.

[0036] It should be understood that, although numerous features and advantages of various embodiments of the present invention have been set forth in the preceding description, together with details of the structure and functions of various embodiments of the invention, this disclosure is illustrative only and changes may be made to certain details, especially in terms of structure and arrangement of parts, which are within the principles of the present invention, to the extent indicated by the broad general meaning of the terms in which the appended claims are expressed. It will be recognized by those skilled in the art that the teachings of the present invention can be applied to other systems without departing from the scope and spirit of the present invention. Petition 870250092962, dated 10 / 10 / 2025, page 24 / 122

Claims

1 / 4 CLAIMS 1. A side-pocketed chuck for use within a gas lift system deployed in a well having an annular space surrounding the gas lift system, the side-pocketed chuck being characterized by comprising: a central body including a central bore; a valve pocket that is offset relative to the central body; a pneumatic gas lift valve installed within the valve pocket; and an electric gas lift valve installed within the valve pocket, the electric gas lift valve being configured to be retrieved from the valve pocket using a wire rope-based tool.

2. Side pocket mandrel, according to claim 1, characterized in that the side pocket mandrel further comprises: a power connection point on the valve pocket and configured to provide an electrical connection to the electric gas lift valve; and a conductor connected to the power connection point and configured to provide electrical power to the power connection point.

3. Side pocket mandrel, according to claim 2, characterized in that the electric gas lift valve and the pneumatic gas lift valve are linearly aligned in the valve pocket.

4. Side pocket mandrel, according to claim 3, characterized in that the electric gas lift valve is positioned below the pneumatic gas lift valve inside the valve pocket.

5. Side pocket mandrel, according to claim 4, characterized in that the side pocket mandrel further comprises a side passage adjacent to the valve pocket.

6. Side pocket mandrel, according to claim 5, characterized in that the side passage comprises an inlet connecting Petition 870250092962, dated 10 / 10 / 2025, page 25 / 122 2 / 4 the side passage to the valve pocket near the electric gas lift valve.

7. Side pocket mandrel, according to claim 6, characterized in that the side passage comprises an outlet connecting the side passage to the valve pocket near the pneumatic gas lift valve.

8. Side pocket chuck, according to claim 2, characterized in that the pneumatic gas lift valve is positioned below the electric gas lift valve inside the valve pocket.

9. Side pocket mandrel, according to claim 8, characterized in that the side pocket mandrel further comprises a side passage adjacent to the valve pocket which places the electric gas lift valve in fluid communication with the pneumatic gas lift valve.

10. Side-bolt mandrel according to claim 2, characterized in that the valve pocket comprises a divider that separates the valve pocket into a first valve pocket and a second valve pocket arranged in a side-by-side relationship.

11. Side-sleeve chuck, according to claim 10, characterized in that the electric gas lift valve is fixed in the first valve pocket and the pneumatic gas lift valve is fixed in the second valve pocket.

12. Side-pocketed mandrel for use within a gas lift system deployed in a well having an annular space surrounding the gas lift system, the side-pocketed mandrel being characterized by comprising: a central body including a central bore; a valve pocket that is offset relative to the central body, wherein the valve pocket comprises: a power connection point in the valve pocket and configured to provide an electrical connection to the electric gas lift valve; and Petition 870250092962, 10 / 10 / 2025, p. 26 / 122 3 / 4 a conductor connected to the power connection point and configured to provide electrical power to the power connection point; and a pneumatic gas lift valve installed within the valve pocket; an electric gas lift valve installed within the valve pocket, wherein the electric gas lift valve and the pneumatic gas lift valve are linearly aligned in the valve pocket.

13. Side pocket chuck, according to claim 12, characterized in that the electric gas lift valve and the pneumatic gas lift valve are both recoverable using wire rope-based tools.

14. Side pocket mandrel, according to claim 13, characterized in that the electric gas lift valve is positioned below the pneumatic gas lift valve inside the valve pocket.

15. Side pocket chuck, according to claim 13, characterized in that the pneumatic gas lift valve is positioned below the electric gas lift valve inside the valve pocket.

16. Side-pocketed mandrel for use within a gas lift system deployed in a well having an annular space surrounding the gas lift system, the side-pocketed mandrel being characterized by comprising: a central body including a central bore; a first valve pocket that is offset relative to the central body, wherein the first valve pocket comprises: a power connection point on the valve pocket and configured to provide an electrical connection to the electric gas lift valve; and a conductor connected to the power connection point and configured to provide electrical power to the power connection point; a second valve pocket that is offset relative to the central body, wherein the second valve pocket is arranged in a side-by-side relationship with the first valve pocket; Petition 870250092962, 10 / 10 / 2025, p.27 / 122 4 / 4 an electric gas lift valve installed inside the first valve pocket; and a pneumatic gas lift valve installed inside the second valve pocket.

17. Side pocket mandrel, according to claim 16, characterized by further comprising a divider that separates the first valve pocket and the second valve pocket.

18. Side pocket mandrel, according to claim 17, characterized in that the divider comprises a through passage that places the electric gas lift valve in fluid communication with the pneumatic gas lift valve.

19. Side-pocket mandrel according to claim 16, characterized in that the side-pocket mandrel further comprises: an external orifice extending from the first valve pocket to the annular space; and an internal port extending from the second valve pocket to the central bore.

20. Side pocket mandrel, according to claim 16, characterized in that the electric gas lift valve and the pneumatic gas lift valve are recoverable from the first and second valve pockets using wire rope-based tools. Petition 870250092962, dated 10 / 10 / 2025, p. 28 / 122

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