DEVICE FOR DEEP LIQUID PRODUCTION THROUGH DOWNHOLE PRESSURE-BOOSTING JET AND USE METHOD

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001]This application is a Continuation of International Application No. PCT/CN2024/078129, filed on Feb. 22, 2024, which claims priority to Chinese Patent Application No. 202311513901.6, filed on Nov. 14, 2023, the entire contents of each of which are hereby incorporated by reference.

TECHNICAL FIELD

[0002]The present disclosure relates to the technical field of oil and gas field production engineering, and in particular, to a device for deep liquid production through a downhole pressure-boosting jet and a use method.

BACKGROUND

[0003]At present, in oil and gas field development, commonly used rod pumps and electric submersible pumps are difficult to apply in deep wells having depths greater than 4500 meters and cannot meet the requirements of deep well production. In existing technologies, a series connection of rod pumps and electric submersible pumps has been used for deep well production; however, the achievable pumping depth can only reach approximately 4000 meters. Moreover, such configurations involve complicated tubing strings, high failure rates, difficult operation and management, stringent operating condition requirements, and high production costs. These technologies are even less applicable for deep and ultra-deep gas wells requiring liquid unloading for gas production. As a result, no ideal liquid lifting and gas producing technology is available for such wells. The same challenge also exists in oil wells with dynamic fluid levels deeper than 5000 meters, where effective liquid lifting and oil production equipment and technologies are lacking.

[0004]Current oil and gas production devices include a first-stage jet pump, a second-stage jet pump, and a gas-liquid atomization ejector. A lower end of the second-stage jet pump is connected to the first-stage jet pump via a small-diameter downhole tubing of a certain length and an inner pipe of the jet pump. A lower end of the gas-liquid atomization ejector is connected to an upper end of the second-stage jet pump via a downhole tubing of a certain length. The gas-liquid atomization ejector includes a gas-liquid atomization body, an atomizer, a drainage pipe, a gas inlet, a gas-liquid separation shroud, and a gas-liquid separator. Using a series connection of two-stage hydraulic jet pumps and one-stage gas-liquid atomization ejection for cumulative liquid lifting can meet a lifting head of 5000 to 6000 meters, thereby satisfying the needs of deep well and ultra-deep well oil production and gas well deliquification. However, this approach still suffers from complex processes, high failure rates, low efficiency, and significant safety risks associated with wellhead pressure and casing pressure bearing capacity. Due to the use of multi-stage jet pumps for production, and because high-pressure power liquid involves high energy consumption, large ground equipment occupation, excessive equipment noise, and significant high pressure risks at the wellhead, the application of this approach is constrained. As deep well production continues over time, the natural decline of the downhole producing fluid level, and the gradual decrease in pressure bearing capacity of the casing and wellbore due to corrosion, the safety risk of operating pressure at the wellhead gradually increases. This leads to intermittent production and pressure-limited production for some wells.

[0005]In view of the aforementioned defects in the prior art, the present disclosure provides a device for deep liquid production through a downhole pressure-boosting jet and a use method, to solve problems such as the large occupation of ground equipment, high energy consumption of equipment, and excessive noise, avoiding the problem of high-pressure safety risks at the wellhead, thereby achieving continuous operations in deep wells.

SUMMARY

[0006]One or more embodiments of the present disclosure provide a device for deep liquid production through downhole pressure-boosting jet. The device includes a liquid storage tank. An extracted liquid pipe and a power liquid pipe are disposed on the liquid storage tank. The device further comprises an electric control cabinet, a flow guide shroud, an electric submersible pump, and one or more jet pumps. The electric control cabinet is disposed beside a wellhead tee. A middle-lower portion of the liquid storage tank is connected to the wellhead tee via the power liquid pipe and in fluid communication with a downhole tubing. An upper side of the liquid storage tank is connected to the wellhead tee via the extracted liquid pipe and in fluid communication with a casing-tubing annulus. The flow guide shroud and the electric submersible pump are connected via the downhole tubing. The one or more jet pumps are connected below the electric submersible pump via the downhole tubing. An upper end of the electric submersible pump is connected to a power source on the ground via a power supply cable.

[0007]In some embodiments, a power liquid outlet, a protector, a motor, and a power liquid inlet of the electric submersible pump are located inside the flow guide shroud. The protector is located on a side of the motor. The power liquid outlet is disposed on an upper portion of the protector. The power liquid inlet is disposed on a lower side of the motor.

[0008]In some embodiments, the electric submersible pump further includes an inverted centrifugal pump. The inverted centrifugal pump is disposed on an upper portion of the flow guide shroud, or the inverted centrifugal pump is disposed below the flow guide shroud.

[0009]In some embodiments, the one or more jet pumps adopt a forward circulation jet pump.

[0010]In some embodiments, the forward circulation jet pump includes a power liquid pump inlet, a nozzle, a throat tube, a pump body, a mixed liquid outlet, a formation liquid inlet channel, a diffusion chamber, and a mixing chamber. The power liquid pump inlet is disposed at an upper end of the pump body. The nozzle is located below the power liquid pump inlet. A lower end outlet of the nozzle is located in the mixing chamber. The formation liquid inlet channel is disposed inside the pump body. An upper end of the formation liquid inlet channel is in fluid communication with the mixing chamber. A lower end of the formation liquid inlet channel is in in fluid communication with a lower end joint of the pump body. The throat tube is disposed below the nozzle. The diffusion chamber is disposed in the pump body below the throat tube. The mixed liquid outlet is disposed at a lower end of the diffusion chamber.

[0011]In some embodiments, the one or more jet pumps further include a reverse circulation jet pump. The reverse circulation jet pump includes a power liquid pump inlet, a nozzle, a throat tube, a pump body, a mixed liquid outlet, a formation liquid inlet channel, a diffusion chamber, and a mixing chamber. The power liquid pump inlet is disposed on a lower side of the pump body. The nozzle is disposed in an inner cavity of the pump body. A lower end of the nozzle is in fluid communication with the power liquid pump inlet. An upper end of the nozzle is located in the mixing chamber. The throat tube is disposed above the nozzle. The diffusion chamber is disposed above the throat tube. The mixed liquid outlet is disposed above the diffusion chamber and is located at an upper end of the pump body. A lower end joint of the pump body is in fluid communication with the formation liquid inlet channel disposed in the pump body. An upper end of the formation liquid inlet channel is in fluid communication with the mixing chamber.

[0012]In some embodiments, a water separator is connected to an upper portion of the electric submersible pump via the downhole tubing.

[0013]In some embodiments, the water separator includes a central pipe, an outer sleeve, a wire-wound filter screen, a liquid inlet hole, a sliding sleeve, a hydrophilic and oleophobic filter tube, and a spring. The outer sleeve sleeves outside the central pipe. A bottom of the outer sleeve is hermetically connected to the central pipe. An upper end of the outer sleeve and the central pipe form a supplementary water channel. The liquid inlet hole is disposed in a middle portion of the central pipe. The hydrophilic and oleophobic filter tube and the wire-wound filter screen are disposed on an outer side of the liquid inlet hole. The hydrophilic and oleophobic filter tube is disposed on an inner side of the wire-wound filter screen. The sliding sleeve is disposed in an inner cavity of the central pipe. The spring and a spring base are disposed below the sliding sleeve.

BRIEF DESCRIPTION OF THE DRAWINGS

[0018]The present disclosure is further described in terms of exemplary embodiments. These exemplary embodiments are described in detail with reference to the drawings. These embodiments are non-limiting schematic embodiments, in which like reference numerals represent similar structures throughout the several views of the drawings, wherein:

[0019]FIG. 1 is a schematic diagram illustrating an overall structure of a device for deep liquid production through downhole pressure-boosting jet according to some embodiments of the present disclosure;

[0020]FIG. 2 is a schematic diagram illustrating a structure of an electric submersible pump according to some embodiments of the present disclosure;

[0021]FIG. 3 is a schematic diagram illustrating another structure of an electric submersible pump according to some embodiments of the present disclosure;

[0022]FIG. 4 is a schematic diagram illustrating a structure of a forward circulation jet pump according to some embodiments of the present disclosure;

[0023]FIG. 5 is a schematic diagram illustrating a structure of a reverse circulation jet pump according to some embodiments of the present disclosure;

[0024]FIG. 6 is a schematic diagram illustrating an overall structure of a device for deep liquid production through downhole pressure-boosting jet according to some embodiments of the present disclosure;

[0025]FIG. 7 is a schematic diagram illustrating an open state of a water separator according to some embodiments of the present disclosure;

[0026]FIG. 8 is a schematic diagram illustrating a closed state of a water separator according to some embodiments of the present disclosure.

[0027]Reference signs in the figures: liquid storage tank 1, extracted liquid pipe 2, power liquid pipe 3, electric control cabinet 4, wellhead tee 5, first flow meter 6, second flow meter 7, power supply cable 8, casing 9, downhole tubing 10, water separator 11, plug connector 12, flow guide shroud 13, electric submersible pump (ESP) 14, jet pump 15, packer 16, check valve 17, formation liquid 18, mixed liquid 19, power source 20;

[0028]central pipe 11.1, outer sleeve 11.2, wire-wound filter screen 11.3, liquid inlet hole 11.4, sliding sleeve 11.5, hydrophilic and oleophobic filter tube 11.6, spring 11.7, sand settling chamber 11.8, supplementary water channel 11.9, spring base 11.10; power liquid outlet 14.1, protector 14.2, motor 14.3, temperature monitor 14.4, cable packer 14.5, inverted centrifugal pump 14.6, power liquid inlet 14.7;

[0029]power liquid pump inlet 15.1, nozzle 15.2, throat tube 15.3, pump body 15.4, mixed liquid outlet 15.5, formation liquid inlet channel 15.6, diffusion chamber 15.7, mixing chamber 15.8.

DETAILED DESCRIPTION

[0030]It should be understood that the terms “system”, “device”, “unit”, and/or “module” used herein are a method for distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other words can achieve the same purpose, the words may be replaced by other expressions.

[0031]As shown in the present disclosure and the claims, unless the context clearly indicates an exception, the words “a”, “an”, “one”, and/or “the” are not limited to singular and may also include plural. In general, the terms “include” and “comprise” only indicate the inclusion of explicitly identified elements, and the elements do not constitute an exclusive list. The device may also include other elements.

[0032]The preferred embodiments of the present disclosure are described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are only for illustration and explanation and are not intended to limit the present disclosure.

[0033]Some embodiments of the present disclosure provide a device for deep liquid production through downhole pressure-boosting jet. The device includes a liquid storage tank. An extracted liquid pipe and a power liquid pipe are disposed on the liquid storage tank. The device further includes an electric control cabinet, a flow guide shroud, an electric submersible pump, and one or more jet pumps. The electric control cabinet is disposed beside a wellhead tee. A middle-lower portion of the liquid storage tank is connected to the wellhead tee via the power liquid pipe and a first flow meter and in fluid communication with a downhole tubing. An upper side of the liquid storage tank is connected to the wellhead tee via the extracted liquid pipe and a second flow meter and in fluid communication with a casing-tubing annulus. The flow guide shroud and the electric submersible pump are connected via the downhole tubing. The one or more jet pumps are connected below the electric submersible pump via the downhole tubing. An upper end of the electric submersible pump is connected to a power source on the ground via a power supply cable. A water separator is connected to an upper portion of the electric submersible pump via the downhole tubing. The water separator includes a central pipe, an outer sleeve, a wire-wound filter screen, a liquid inlet hole, a sliding sleeve, a hydrophilic and oleophobic filter tube, and a spring. The outer sleeve sleeves outside the central pipe. A bottom of the outer sleeve is hermetically connected to the central pipe to form a sand settling chamber. An upper end of the outer sleeve and the central pipe form a supplementary water channel. The liquid inlet hole is disposed in a middle portion of the central pipe. The hydrophilic and oleophobic filter tube and the wire-wound filter screen are disposed on an outer side of the liquid inlet hole. The hydrophilic and oleophobic filter tube is disposed on an inner side of the wire-wound filter screen. The sliding sleeve is disposed in an inner cavity of the central pipe. The spring and a spring base are disposed below the sliding sleeve.

[0034]FIG. 1 is a schematic diagram illustrating an overall structure of a device for deep liquid production through downhole pressure-boosting jet according to some embodiments of the present disclosure.

[0035]In some embodiments, referring to FIG. 1, the present disclosure provides a device for deep liquid production through downhole pressure-boosting jet. The device includes a liquid storage tank 1. An extracted liquid pipe 2 and a power liquid pipe 3 are disposed on the liquid storage tank 1. The device further includes an electric control cabinet 4, a flow guide shroud 13, an electric submersible pump 14, and one or more jet pumps 15. The electric control cabinet 4 is disposed beside a wellhead tee 5. A middle-lower portion of the liquid storage tank 1 is connected to the wellhead tee 5 via the power liquid pipe 3 and a first flow meter 6 and in fluid communication with a downhole tubing 10. An upper side of the liquid storage tank 1 is connected to the wellhead tee 5 via the extracted liquid pipe 2 and a second flow meter 7 and in fluid communication with a casing-tubing annulus between a casing 9 and the downhole tubing 10. The flow guide shroud 13 and the electric submersible pump 14 are connected via the downhole tubing 10. The one or more jet pumps 15 are connected below the electric submersible pump 14 via the downhole tubing 10. An upper end of the electric submersible pump 14 is connected to a power source 20 on the ground via a power supply cable 8.

[0036]The liquid storage tank 1 refers to a tank body for storing power liquid or extracted liquid. The power liquid refers to liquid (i.e., settling water) for assisting in providing liquid production power. The extracted liquid pipe 2 refers to a pipe for injecting liquid extracted from downhole into the liquid storage tank 1. The power liquid pipe 3 refers to a pipe for delivering the power liquid to the downhole. The electric control cabinet 4 refers to a cabinet body for mounting electrical equipment, instruments, meters, and control devices. The flow guide shroud 13 refers to a cylindrical component that wraps outside the electric submersible pump 14. The electric submersible pump 14 refers to a component for performing first pressurization on the power liquid delivered from the ground. The one or more jet pumps 15 refer to one or more stages of jet pumps 15. For example, a jet pump including a forward circulation jet pump or a reverse circulation jet pump is a one-stage jet pump, and a jet pump including one or more combinations of a forward circulation jet pump and/or a reverse circulation jet pump is a multi-stage jet pump. Whether to use the one-stage jet pump or the multi-stage jet pump may be determined according to actual requirements. The one or more jet pumps 15 are configured to perform second pressurization on the power liquid and spray the power liquid to form a negative pressure. The wellhead tee 5 refers to a ground manifold component disposed at a wellhead. The casing 9 refers to a pipe run into a well and is fixed to a well wall. The downhole tubing 10 refers to a pipe with a smaller diameter that run into the well along an inside of the casing 9. The downhole tubing 10 is configured to connect the ground with downhole liquid production equipment. The casing-tubing annulus refers to an annular space formed between an inner wall of the casing 9 and an outer wall of the downhole tubing 10. The casing-tubing annulus is configured to deliver a returned mixed liquid to the extracted liquid pipe 2.

[0037]By providing the device for deep liquid production through downhole pressure-boosting jet combining the electric submersible pump (motor-driven) and the jet pumps (fluid-driven), the device for deep liquid production through downhole pressure-boosting jet is more reliable compared to pure hydraulic or pure rod systems. The device for deep liquid production through downhole pressure-boosting jet can ensure continuous liquid lifting operations in deep wells.

[0038]FIG. 2 is a schematic diagram illustrating a structure of an electric submersible pump according to some embodiments of the present disclosure. FIG. 3 is a schematic diagram illustrating another structure of an electric submersible pump according to some embodiments of the present disclosure.

[0039]In some embodiments, referring to FIG. 2, a power liquid outlet 14.1, a protector 14.2, a motor 14.3, and a power liquid inlet 14.7 of the electric submersible pump 14 are located inside the flow guide shroud 13. The protector 14.2 is located on a side of the motor 14.3. The power liquid outlet 14.1 is disposed on an upper portion of the protector 14.2. The power liquid inlet 14.7 is disposed on a lower side of the motor 14.3.

[0040]The protector 14.2 refers to a component for protecting the motor 14.3. The motor 14.3 is configured to provide power to the electric submersible pump 14. In some embodiments, an inner wall of the flow guide shroud 13 and outer walls of the protector 14.2 and the motor 14.3 may form an annular flow channel. The annular flow channel guides the power liquid to cool and lubricate the motor 14.3, ensuring heat exchange and normal operation of the device.

[0041]By providing the electric submersible pump including the power liquid outlet, the protector, the motor, and the power liquid inlet, and setting the electric submersible pump inside the flow guide shroud, normal operation of the protector is facilitated. The overall service life of the electric submersible pump is extended. The electric submersible pump can operate reliably for a long time in harsh environments.

[0042]In some embodiments, as shown in FIG. 2 and FIG. 3, the electric submersible pump 14 further includes an inverted centrifugal pump 14.6. The inverted centrifugal pump 14.6 is disposed on an upper portion of the flow guide shroud 13 (see FIG. 2) or is disposed below the flow guide shroud 13 (see FIG. 3). The inverted centrifugal pump 14.6 refers to a component in the electric submersible pump 14 for pressurization. By disposing the inverted centrifugal pump on the upper portion or below the flow guide shroud, the inverted centrifugal pump can flexibly adapt to different wellbore structures, facilitating engineering implementation.

[0043]In some embodiments, a temperature monitor 14.4 and a pressure sensor are disposed on an upper side of the power liquid outlet 14.1. The temperature monitor 14.4 and the pressure sensor transmit and feed back measured pressure and temperature parameters of the power liquid to the ground. The power supply cable 8 is bundled to an outer wall of the downhole tubing 10 and run into the casing 9. A lower portion of the power supply cable 8 passes through the flow guide shroud 13 and is connected to the motor 14.3 via a cable packer 14.5. The power supply cable 8 is connected via a plug connector 12.

[0044]FIG. 4 is a schematic diagram illustrating a structure of a forward circulation jet pump according to some embodiments of the present disclosure.

[0045]In some embodiments, the one or more jet pumps 15 adopt a forward circulation jet pump. The forward circulation jet pump refers to a jet pump in which the power liquid is sprayed downward. In this embodiment, by adopting the electric submersible pump 14 plus a single-stage jet pump 15 to form a deep production tubing string, the deep production tubing string is suitable for operating conditions with a lifting head of less than 4000 meters. By setting the one or more jet pumps to adopt the forward circulation jet pump, the structure of the tubing string is relatively simple, the jet pump is more efficient, and management is more convenient. In some embodiments, the one or more jet pumps 15 may adopt a reverse circulation jet pump according to actual requirements. More descriptions regarding the reverse circulation jet pump are described later.

[0046]In some embodiments, referring to FIG. 4, the forward circulation jet pump includes a power liquid pump inlet 15.1, a nozzle 15.2, a throat tube 15.3, a pump body 15.4, a mixed liquid outlet 15.5, a formation liquid inlet channel 15.6, a diffusion chamber 15.7, and a mixing chamber 15.8. The power liquid pump inlet 15.1 is disposed at an upper end of the pump body 15.4. The nozzle 15.2 is located below the power liquid pump inlet 15.1. A lower end outlet of the nozzle 15.2 is located in the mixing chamber 15.8. The formation liquid inlet channel 15.6 is disposed inside the pump body 15.4. An upper end of the formation liquid inlet channel 15.6 is in fluid communication with the mixing chamber 15.8. A lower end of the formation liquid inlet channel 15.6 is in fluid communication with a lower end connector of the pump body 15.4. The throat tube 15.3 is disposed below the nozzle 15.2. The diffusion chamber 15.7 is disposed in the pump body 15.4 below the throat tube 15.3. The mixed liquid outlet 15.5 is disposed at a lower end of the diffusion chamber 15.7. The mixing chamber 15.8 refers to a chamber for mixing the power liquid and formation liquid returned from the formation liquid inlet channel 15.6. The diffusion chamber 15.7 is configured to convert a portion of kinetic energy of mixed liquid into pressure energy. The mixed liquid is finally delivered to the casing-tubing annulus at a certain flow rate.

[0047]By setting the forward circulation jet pump in this way, a high-speed jet can be achieved to generate a negative pressure, the formation liquid can be efficiently sucked in and mixed, and efficient operation of the entire system can be ensured.

[0052]FIG. 6 is a schematic diagram illustrating an overall structure of a device for deep liquid production through downhole pressure-boosting jet according to some embodiments of the present disclosure. FIG. 7 is a schematic diagram illustrating an open state of a water separator according to some embodiments of the present disclosure. FIG. 8 is a schematic diagram illustrating a closed state of a water separator according to some embodiments of the present disclosure.

[0053]In some embodiments, referring to FIG. 6, a water separator 11 is connected to an upper portion of the electric submersible pump 14. The water separator 11 is connected via the downhole tubing 10.

[0054]The water separator 11 is configured to separate water from the returned mixed liquid. The water separator 11 injects the separated water as supplementary power liquid into the electric submersible pump 14. In some embodiments, referring to FIGS. 7-8, the water separator 11 includes a central pipe 11.1, an outer sleeve 11.2, a wire-wound filter screen 11.3, a liquid inlet hole 11.4, a sliding sleeve 11.5, a hydrophilic and oleophobic filter tube 11.6, and a spring 11.7. The outer sleeve 11.2 sleeves outside the central pipe 11.1. A bottom of the outer sleeve 11.2 is hermetically connected to the central pipe 11.1 to form a sand settling chamber 11.8. An upper end of the outer sleeve 11.2 and the central pipe 11.1 form a supplementary water channel 11.9. The liquid inlet hole 11.4 is disposed in a middle portion of the central pipe 11.1. The hydrophilic and oleophobic filter tube 11.6 and the wire-wound filter screen 11.3 are disposed on an outer side of the liquid inlet hole 11.4. The hydrophilic and oleophobic filter tube 11.6 is disposed on an inner side of the wire-wound filter screen 11.3. The sliding sleeve 11.5 is disposed in an inner cavity of the central pipe 11.1. The spring 11.7 and a spring base 11.10 are disposed below the sliding sleeve 11.5. By providing the water separator, the amount of power liquid input from the ground and the length of a circulation path can be reduced. The amount of produced mixed liquid 19 to be processed on the ground can be reduced, achieving the purpose of reducing resistance and saving energy.

[0059]By using the device for deep liquid production through downhole pressure-boosting jet including the water separator, a portion of water in the mixed liquid can be directly separated downhole and reused as the power liquid. The amount of clean water that needs to be repeatedly pumped from the ground and the circulation path are significantly reduced. Meanwhile, system energy consumption can be reduced, the burden of ground water treatment can be alleviated, and the scale and pressure requirements of ground equipment (e.g., pumps and tanks) can be further reduced. The device for deep liquid production through downhole pressure-boosting jet can be suitable for offshore platforms with limited space or regions with high environmental protection requirements.

[0060]In some embodiments, the one or more jet pumps 15 may further include a reverse circulation jet pump. For example, the one or more jet pumps 15 may include a forward circulation jet pump and a reverse circulation jet pump. As another example, the one or more jet pumps 15 may include a plurality of forward circulation jet pumps and a plurality of reverse circulation jet pumps corresponding to the plurality of forward circulation jet pumps. The reverse circulation jet pump refers to a jet pump in which the power liquid is sprayed upward. An inner diameter of the nozzle of the forward circulation jet pump is greater than an inner diameter of the reverse circulation jet pump. By combining the forward circulation jet pump and the reverse circulation jet pump, the device for deep liquid production through downhole pressure-boosting jet is suitable for well conditions with a greater lifting head of 4000 meters to 6000 meters.

[0061]FIG. 5 is a schematic diagram illustrating a structure of a reverse circulation jet pump according to some embodiments of the present disclosure.

[0062]In some embodiments, referring to FIG. 5, the reverse circulation jet pump includes the power liquid pump inlet 15.1, the nozzle 15.2, the throat tube 15.3, the pump body 15.4, the mixed liquid outlet 15.5, the formation liquid inlet channel 15.6, the diffusion chamber 15.7, and the mixing chamber 15.8. The power liquid pump inlet 15.1 is disposed at a lower side of the pump body 15.4. The nozzle 15.2 is disposed in an inner cavity of the pump body 15.4. A lower end of the nozzle 15.2 is in fluid communication with the power liquid pump inlet 15.1. An upper end of the nozzle 15.2 is located in the mixing chamber 15.8. The throat tube 15.3 is disposed above the nozzle 15.2. The diffusion chamber 15.7 is disposed above the throat tube 15.3. The mixed liquid outlet 15.5 is disposed above the diffusion chamber 15.7 and located at an upper end of the pump body 15.4. A lower end joint of the pump body 15.4 is in fluid communication with the formation liquid inlet channel 15.6 disposed inside the pump body 15.4. An upper end of the formation liquid inlet channel 15.6 is in fluid communication with the mixing chamber 15.8. By comparing FIGS. 4-5 and the above description, it can be seen that the reverse circulation jet pump and the forward circulation jet pump include the same components, with only a positional relationship or a liquid flow path being slightly different, which is not repeated here.

[0063]When the one or more jet pumps 15 adopt a forward circulation jet pump and a reverse circulation jet pump, an upper portion of the reverse circulation jet pump may be connected to a lower portion of the forward circulation jet pump to form a passage. The formation liquid 18 may first pass through the reverse circulation jet pump to form the mixed liquid 19. The mixed liquid 19 is pressurized and then enters the forward circulation jet pump for mixing again. Then, after secondary pressurization by the forward circulation jet pump, the mixed liquid 19 enters the casing-tubing annulus. The mixed liquid 19 is finally delivered to the liquid storage tank 1.

[0068]The foregoing descriptions are merely some preferred embodiments of the present disclosure. Any person skilled in the art may modify the technical solutions described above or modify the technical solutions into equivalent technical solutions. Therefore, corresponding simple modifications or equivalent changes made according to the technical solutions of the present disclosure all fall within the scope of protection claimed by the present disclosure.

[0069]Meanwhile, according to some embodiments of the present disclosure, specific words are used to describe the embodiments of the present disclosure. For example, “an embodiment,” “one embodiment,” and/or “some embodiments” mean that a certain feature, structure, or characteristic is related to at least one embodiment of the present disclosure. Therefore, it should be emphasized and noted that “an embodiment,” “one embodiment,” or “an alternative embodiment” mentioned two or more times at different locations in the present disclosure does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the present disclosure may be appropriately combined.

[0070]Similarly, it should be noted that, in order to simplify the expressions disclosed in the present disclosure and thereby help understand one or more inventive embodiments, various features are sometimes grouped into one embodiment, drawing, or description thereof in the foregoing description of the embodiments of the present disclosure. However, this disclosure method does not mean that the object of the present disclosure requires more features than those mentioned in the claims. Rather, claimed subject matter may lie in less than all features of a single foregoing disclosed embodiment.

[0071]Each patent, patent application, patent application publication, and other material, such as articles, books, specifications, publications, documents, etc., cited in the present disclosure is hereby incorporated by reference in its entirety. Application history documents that are inconsistent with or conflict with the content of the present disclosure are excluded. Documents that limit the broadest scope of the claims of the present disclosure (currently or later appended to the present disclosure) are also excluded. It should be noted that if descriptions, definitions, and/or use of terms in the accompanying materials of the present disclosure are inconsistent with or conflict with those in the present disclosure, the descriptions, definitions, and/or use of terms in the present disclosure shall prevail.

[0072]Finally, it should be understood that the embodiments described in the present disclosure are only used to illustrate principles of the embodiments of the present disclosure. Other variations may also fall within the scope of the present disclosure. Therefore, by way of example and not limitation, alternative configurations of embodiments of the present disclosure may be considered consistent with the teachings of the present disclosure. Accordingly, the embodiments of the present disclosure are not limited to the embodiments explicitly introduced and described in the present disclosure.