Drainage gas recovery device formed by combining cable laying pipe and electric submersible pump

Abstract

The utility model relates to a drainage and gas recovery device formed by combining a cable laying pipe and an electric submersible pump, which is characterized by comprising a sleeve, and a cable laying pipe, a metal joint, a mechanical anchor, a connector and an electric submersible pump which are arranged in the sleeve and connected in sequence, the upper end of the cable laying pipe sequentially penetrates out of the wellhead device, the blowout preventer and the injector from bottom to top and then is configured with the power winding frame. A continuous oil pipe is replaced by the cable laying pipe, the cable laying pipe is tripped to a specified depth, the wax blockage, corrosion or scaling phenomenon of a speed pipe column can be solved, and stable production in the self-spraying period is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage and gas production devices, in particular to a drainage and gas production device formed by combining a cable laying pipe and an electric submersible pump. Background Art

[0002] Normal-pressure shale gas wells have a low initial formation pressure coefficient. While some wells can achieve self-flow after fracturing and energy enhancement, a few still fail to do so, requiring forced drainage to test production and ensure stable subsequent production. Conventional electric submersible pumps (ESPs) require well killing for drainage. Initially, rodless production technology, using wax-resistant tubing with externally tied cables and submersible pumps, was used. However, numerous pump inspections have been required due to scaling and wax deposition. To address these issues, a drainage and gas recovery system combining cable-laid tubing and ESPs has been developed. Utility Model Content

[0003] The purpose of the utility model is to provide a drainage and gas production device formed by combining a cable laying pipe and an electric submersible pump, which can effectively solve the problems of corrosion and scaling of traditional continuous oil pipes and cable knocking and falling into the well, thereby further improving operating efficiency.

[0004] The utility model is achieved in this way:

[0005] The utility model provides a drainage and gas production device formed by a combination of a cable pipe and an electric submersible pump, which is characterized by comprising a casing, a cable pipe, a metal joint, a mechanical anchor, a connector and an electric submersible pump which are arranged in sequence inside the casing, and the upper end of the cable pipe passes through the wellhead device, the blowout preventer and the injector in sequence from bottom to top and is then configured with a power reeling frame.

[0006] In some optional embodiments, the metal joint includes an inner tube and an outer tube that are sequentially sleeved inside and outside, and a joint end portion arranged at one end of the inner tube and the outer tube. A central through hole is provided inside the inner tube and the joint. A gap is provided between the inner tube and the outer tube for facilitating the installation of cables through the cable laying pipe. A plurality of cable holes are provided on the joint end portion for facilitating the passage of cables. One end of the metal joint away from the joint end portion is fixedly connected to the cable laying pipe, and the other end is fixedly connected to the mechanical anchor.

[0007] In some optional embodiments, the outer wall of the inner tube and the inner wall of the outer tube at the end of the metal joint away from the joint end are both provided with a clamping portion for clamping with the cabling pipe.

[0008] In some optional embodiments, the engaging portion is engaging teeth.

[0009] In some optional embodiments, the cable laying pipe includes an inner liner, a structural layer, and an outer protective layer which are sequentially sleeved from the inside to the outside, and a cable is arranged in the inner liner.

[0010] In some optional embodiments, a heating layer for heating cables is embedded between the structural layer and the inner liner, and the cables are located in the heating layer.

[0011] In some optional embodiments, cable threading grooves are provided on the peripheries of the mechanical anchor and the connector to facilitate threading of the cables.

[0012] In some optional embodiments, the end of the cable laying pipe wound on the power winding rack is divided into a liquid circuit and an electric circuit through a metal joint and an electro-hydraulic slip ring. The metal joint leads out the cable, and the cable is connected to the electric control cabinet.

[0013] The beneficial effects of this utility model are as follows: 1. This utility model uses a cable-laying pipe instead of coiled tubing. Lowering the cable-laying pipe to a specified depth can eliminate wax blockage, corrosion, or scaling in the velocity string, ensuring stable production during the flow period. 2. The cable-laying pipe also incorporates a built-in heating cable, coupled with a ground-based heating control system, effectively preventing wax and scaling in the string. The entire string is joint-free, simplifying the overall string connection process. 3. It enables intelligent detection of parameters such as downhole heating and de-blocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a structural schematic diagram of a drainage and gas production device formed by combining a cable pipe and an electric submersible pump provided in an embodiment of the present invention.

[0016] Figure 2 A schematic cross-sectional view of a cable laying pipe provided in an embodiment of the present utility model.

[0017] Figure 3 This is a schematic structural diagram of a metal joint provided in an embodiment of the present utility model.

[0018] Figure 4 This is a structural schematic diagram of the connection between the cable laying pipe and the metal joint provided in an embodiment of the utility model.

[0019] Figure 5 This is a schematic diagram of the cable threading groove structure on the mechanical anchor provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0025] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0027] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0028] like Figure 1 As shown, the utility model provides a drainage and gas production device formed by a cable pipe and an electric submersible pump, including a casing, a cable pipe 5, a metal joint 10, a mechanical anchor 11, a connector 12 and an electric submersible pump 13 arranged in sequence inside the casing, the upper end of the cable pipe 5 passes through the wellhead device 9, the blowout preventer 8 and the injector 7 from bottom to top in sequence and then connects to the power winding rack configuration 3, the end of the cable pipe 5 wound on the power winding rack configuration 3 is divided into a liquid circuit and an electric circuit by a metal joint 2 and an electro-hydraulic slip ring 4, the metal joint 2 leads out the cable 1, and the cable 1 is connected to the electric control cabinet.

[0029] like Figure 2 As shown, the cable pipe in the present invention is an ICCP pipe. The cable pipe 5 comprises an inner liner 505, a structural layer 502, and an outer protective layer 501, which are sequentially connected from the inside out. A cable 503 is located within the inner liner. A heating cable can also be built into the cable pipe to achieve heat-tracing mining, effectively alleviate wax buildup, and extend pump inspection cycles. Specifically, a heating layer 504 for heating the cable is embedded within the structural layer 502, and the cable 503 is located within the heating layer. The inner liner 505 can be made of materials such as PE, PA, PVDF, PPS, and PEEK. The inner liner is embedded with power cables, heating conductors, optical fibers, or signal lines. The structural layer 502 is a fiber-reinforced layer primarily composed of reinforcing fibers to withstand the various mechanical properties of the intelligent coiled pipe. The fibers are made of aramid, carbon fiber, glass fiber, or other high-performance fibers. The outer protective layer 501 is made of materials such as PE, PA, PVDF, PPS, and PEEK, providing protection during transportation, operation, and production. The inner liner 505 and the outer protective layer 501 can be made of high-temperature resistant polyethylene, which is suitable for most well conditions.

[0030] The cable laying pipe of the present invention is connected to both the uphole and downhole tools using metal joints, wherein the metal joints have the same structure. The metal joint 10 is mainly composed of three parts: an outer tube 1002, an inner tube 1003, and a joint end 1001. The metal joint 10 and the cable laying pipe adopt the buckling principle to connect the cable laying pipe with the uphole and downhole tools, and to lead out the metal joint of the cable. The metal joint is processed as a whole using an integrated welding molding process. The built-in cable of the cable laying pipe 5 and the lead-out cable are connected in the metal joint cavity, and the remaining space is sealed with filler, which effectively isolates oil, gas and water, meeting the waterproof and insulation requirements.

[0031] like Figure 3-4 As shown, the metal joint includes an inner tube 1003 and an outer tube 1002 that are sequentially sleeved together, and a joint end 1001 disposed at one end of the inner and outer tubes. Both the inner tube and the joint end 1001 have central through-holes. A gap is provided between the inner and outer tubes to facilitate the insertion of cables into the cabling pipe. The joint end is provided with multiple cable holes for facilitating the passage of cables. One end of the metal joint, away from the joint end, is fixedly connected to the cabling pipe, and the other end is fixedly connected to a mechanical anchor. Specifically, the outer wall of the inner tube and the inner wall of the outer tube at the end of the metal joint, away from the joint end, are provided with a clamping portion 1004 for clamping with the cabling pipe. Preferably, the clamping portion 1004 is a clamping tooth.

[0032] like Figure 5 As shown, the mechanical anchor, connector and electric submersible pump required in this embodiment are existing technologies. For improvement in this embodiment, a cable threading groove 1101 is provided on the periphery of the mechanical anchor and connector to facilitate the threading of the cable.

[0033] The beneficial effects of this utility model are as follows: 1. This utility model uses a cable-laying pipe instead of coiled tubing. Lowering the cable-laying pipe to a specified depth can eliminate wax blockage, corrosion, or scaling in the velocity string, ensuring stable production during the flow period. 2. The cable-laying pipe also incorporates a built-in heating cable, coupled with a ground-based heating control system, effectively preventing wax and scaling in the string. The entire string is joint-free, simplifying the overall string connection process. 3. It enables intelligent detection of parameters such as downhole heating and de-blocking.

[0034] The embodiments described above are only some of the embodiments of the present invention, not all of them. The detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

Claims

1. A drainage and gas production device formed by combining a cable pipe and an electric submersible pump, characterized in that: It includes a casing, a cable pipe, a metal joint, a mechanical anchor, a connector and an electric submersible pump that are sequentially connected in the casing. The upper end of the cable pipe passes through the wellhead device, the blowout preventer and the injector in sequence from bottom to top and is then configured with a power reel.

2. The drainage and gas production device formed by combining a cable pipe and an electric submersible pump according to claim 1 is characterized in that: The metal joint includes an inner tube and an outer tube that are sequentially sleeved inside and outside, and a joint end portion arranged at one end of the inner tube and the outer tube. A central through hole is provided inside the inner tube and the joint. A gap is provided between the inner tube and the outer tube for facilitating the installation of cables through the cable laying pipe. A plurality of cable holes are provided on the joint end portion for facilitating the passage of cables through the cable laying pipe. One end of the metal joint away from the joint end portion is fixedly connected to the cable laying pipe, and the other end is fixedly connected to the mechanical anchor.

3. The drainage and gas production device formed by combining a cable pipe and an electric submersible pump according to claim 2 is characterized in that: The outer wall of the inner tube and the inner wall of the outer tube at one end of the metal joint away from the joint end are both provided with a clamping portion for clamping with the cable laying pipe.

4. The drainage and gas production device formed by combining a cable pipe and an electric submersible pump according to claim 3 is characterized in that: The clamping portion is a clamping tooth.

5. The drainage and gas production device formed by combining a cable pipe and an electric submersible pump according to claim 1 or 2, characterized in that: The cable laying pipe comprises an inner lining sleeve, a structural layer and an outer protective layer which are sequentially sleeved from the inside to the outside, and a cable is arranged in the inner lining sleeve.

6. The drainage and gas production device formed by combining a cable pipe and an electric submersible pump according to claim 5, characterized in that: A heating layer for heating cables is embedded between the structural layer and the inner lining, and the cables are located in the heating layer.

7. The drainage and gas production device formed by combining a cable pipe and an electric submersible pump according to claim 1 or 2, characterized in that: Cable threading grooves are provided on the periphery of the mechanical anchor and the connector for easy threading of the cables.

8. The drainage and gas production device formed by combining a cable pipe and an electric submersible pump according to claim 1 or 2, characterized in that: The end of the cable laying pipe wound on the power reeling frame is divided into a liquid circuit and an electric circuit through a metal joint and an electro-hydraulic slip ring. The metal joint leads out the cable, and the cable is connected to the electric control cabinet.

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