Simple wellhead over cable

Abstract

The utility model discloses a kind of simple wellheads of crossing cable, comprising: casing and oil pipe elbow, the oil pipe elbow one end is communicated in the casing top end, the casing top end is fixedly connected with casing flange, the oil pipe elbow bottom end is fixedly connected with wellhead flange, the casing flange and the wellhead flange are connected by bolt sealing, the oil pipe elbow side end is communicated with cable seal, cable is arranged in the cable seal, sealing assembly is equipped in the cable seal, the sealing assembly is sealed to the cable and is positioned, the oil pipe elbow other end is provided with tee structure, tee structure is respectively communicated with liquid outlet pipe and spare pipe. The utility model is arranged through cable seal, cable is arranged in cable seal, then sealed by sealing assembly, to solve the problem that current wellhead is complex, cable sealing effect is poor.

Description

Technical Field

[0001] This utility model relates to the field of oilfield development technology, and in particular to a simple wellhead for cable crossing. Background Technology

[0002] In some directional and horizontal wells with complex trajectories, rod pump lifting suffers from severe rod wear and breakage problems. The use of submersible electric pumps (ESPs) in well development is increasing annually, effectively solving these issues and offering advantages such as high system efficiency, adaptability to large well inclinations, and high level of automation. However, ESP wells typically have complex wellheads, long operation times, impacting operational efficiency and well production. Furthermore, cable sealing issues at the wellhead pose safety hazards. Utility Model Content

[0003] The purpose of this utility model is to provide a simple wellhead for cable passage. By setting a cable sealer, the cable is passed through the cable sealer and then sealed by a sealing component, so as to solve the problems of complex wellheads and poor cable sealing effect.

[0004] To achieve the purpose of this utility model, a simplified wellhead for cable routing is provided, comprising: a casing and a tubing elbow. One end of the tubing elbow is connected to the top of the casing, and a casing flange is fixedly connected to the top of the casing. A wellhead flange is fixedly connected to the bottom of the tubing elbow. The casing flange and the wellhead flange are connected by bolts for sealing. A cable sealer is connected to the side of the tubing elbow. A cable is threaded through the cable sealer, and a sealing component is provided inside the cable sealer to seal and limit the cable. A tee structure is provided at the other end of the tubing elbow, and the tee structure is connected to an outlet pipe and a spare pipe respectively.

[0005] As a preferred embodiment of the present invention, the cable sealer includes an outer cylinder, the cable passes through the outer cylinder, one end of the outer cylinder is connected to the side end of the oil pipe elbow, a limiting boss is formed on the inner wall of the other end of the outer cylinder, and the sealing component is disposed in the limiting boss.

[0006] As a preferred technical solution of this utility model, the sealing assembly includes a sealing ring, a pressure ring, and a pressure cap. The sealing ring is installed inside the limiting boss, the pressure ring is installed on the top of the sealing ring, the pressure cap is installed on the top of the pressure ring, and the inner wall of the pressure cap is threadedly connected to the outer wall of the outer cylinder.

[0007] As a preferred embodiment of this utility model, the top end of the pressure ring extends beyond the top end of the outer cylinder.

[0008] As a preferred embodiment of this utility model, the cable is threaded through the sealing ring, the pressure ring, and the pressure cap.

[0009] As a preferred embodiment of this utility model, the side end of the casing is connected to a casing bypass, and the casing bypass is equipped with a valve and a pressure gauge.

[0010] As a preferred embodiment of this utility model, the number of the bushing bypass is set to two, and the two bushing bypasses are installed symmetrically.

[0011] As a preferred embodiment of this utility model, the outlet pipe is equipped with a valve, a pressure gauge, a flow meter, and a sampling valve.

[0012] As a preferred embodiment of this invention, the spare pipe is equipped with a valve.

[0013] Compared with the prior art, this utility model provides a simplified wellhead for cable passage, which has the following advantages:

[0014] This invention addresses the problems of complex wellheads and poor cable sealing by incorporating a cable sealer into which the cable is threaded and then sealed using a sealing assembly. The pressure ring extends beyond the top of the outer cylinder; during cap installation, it compresses the pressure ring, causing deformation of the sealing ring and ensuring it adheres tightly to the outer surface of the cable and the inner surface of the outer cylinder, forming a seal. The structure is simple and facilitates subsequent component replacement. Compared to conventional wellheads, it simplifies the small four-way connector, replacing it with an oil tubing elbow, a fluid outlet pipe, and a spare pipe, resulting in a simple structure with complete functionality. The casing bypass is equipped with a valve and a pressure gauge. Closing the valve allows for casing pressure monitoring, while opening it enables well flushing and fluid level measurement. The fluid outlet pipe is equipped with a pressure gauge, flow meter, sampling valve, and other valves to measure tubing pressure, back pressure, and produced fluid volume. Opening the sampling valve allows for sampling of the produced fluid. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the cable sealer structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the bushing bypass installation structure of this utility model.

[0018] 1 is casing, 2 is tubing elbow, 3 is casing flange, 4 is wellhead flange, 5 is cable seal, 6 is cable, 7 is outlet pipe, 8 is spare pipe, 9 is outer cylinder, 10 is limiting boss, 11 is sealing ring, 12 is pressure ring, 13 is pressure cap, 14 is casing bypass, 15 is valve, 16 is pressure gauge, 17 is flow meter, and 18 is sampling valve. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-3 This utility model provides a simplified wellhead for cable routing, comprising: a casing 1 and a tubing elbow 2. One end of the tubing elbow 2 is connected to the top of the casing 1. A casing flange 3 is fixedly connected to the top of the casing 1, and a wellhead flange 4 is fixedly connected to the bottom of the tubing elbow 2. The casing flange 3 and the wellhead flange 4 are connected by bolts for sealing. A cable sealer 5 is connected to the side of the tubing elbow 2. A cable 6 is threaded through the cable sealer 5, and a sealing component is provided inside the cable sealer 5 to seal and limit the cable 6. A tee structure is provided at the other end of the tubing elbow 2, and the tee structure is connected to an outlet pipe 7 and a spare pipe 8 respectively.

[0021] In one embodiment of the present invention, the cable sealer 5 includes an outer cylinder 9, the cable 6 passes through the outer cylinder 9, one end of the outer cylinder 9 is connected to the side end of the oil pipe elbow 2, and a limiting boss 10 is formed on the inner wall of the other end of the outer cylinder 9, and the sealing component is disposed in the limiting boss 10.

[0022] In one embodiment of the present invention, the sealing assembly includes a sealing ring 11, a pressure ring 12, and a pressure cap 13. The sealing ring 11 is installed inside the limiting boss 10, the pressure ring 12 is installed on the top of the sealing ring 11, and the pressure cap 13 is installed on the top of the pressure ring 12. The inner wall of the pressure cap 13 is threadedly connected to the outer wall of the outer cylinder 9.

[0023] In one embodiment of this utility model, the top end of the pressure ring 12 extends beyond the top end of the outer cylinder 9.

[0024] In one embodiment of the present invention, the cable 6 passes through the sealing ring 11, the pressure ring 12 and the pressure cap 13.

[0025] In one embodiment of the present invention, the side end of the sleeve 1 is connected to a sleeve bypass 14, and the sleeve bypass 14 is equipped with a valve 15 and a pressure gauge 16.

[0026] In one embodiment of this utility model, the number of the sleeve bypass 14 is set to two, and the two sleeve bypass 14 are installed symmetrically.

[0027] In one embodiment of this utility model, the liquid outlet pipe 7 is equipped with a valve 15, a pressure gauge 16, a flow meter 17, and a sampling valve 18.

[0028] In one embodiment of this utility model, the spare pipe 8 is equipped with a valve 15.

[0029] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A simple wellhead for cable passage, characterized in that, include: The casing (1) and tubing elbow (2) are connected at one end to the top of the casing (1). A casing flange (3) is fixedly connected to the top of the casing (1). A wellhead flange (4) is fixedly connected to the bottom of the tubing elbow (2). The casing flange (3) and the wellhead flange (4) are connected by bolts. A cable seal (5) is connected to the side of the tubing elbow (2). A cable (6) is threaded through the cable seal (5). A sealing component is provided inside the cable seal (5). The sealing component seals and limits the cable (6). A tee structure is provided at the other end of the tubing elbow (2). The tee structure is connected to the outlet pipe (7) and the spare pipe (8) respectively.

2. The simplified wellhead for cable passage according to claim 1, characterized in that: The cable seal (5) includes an outer cylinder (9), the cable (6) passes through the outer cylinder (9), one end of the outer cylinder (9) is connected to the side end of the oil pipe elbow (2), and a limiting boss (10) is provided on the inner wall of the other end of the outer cylinder (9), and the sealing assembly is disposed in the limiting boss (10).

3. A simplified wellhead for cable passage according to claim 2, characterized in that: The sealing assembly includes a sealing ring (11), a pressure ring (12), and a pressure cap (13). The sealing ring (11) is installed inside the limiting boss (10), the pressure ring (12) is installed on the top of the sealing ring (11), and the pressure cap (13) is installed on the top of the pressure ring (12). The inner wall of the pressure cap (13) is threadedly connected to the outer wall of the outer cylinder (9).

4. A simplified wellhead for cable passage according to claim 3, characterized in that: The top of the pressure ring (12) extends out of the top of the outer cylinder (9).

5. A simplified wellhead for cable passage according to claim 3, characterized in that: The cable (6) passes through the sealing ring (11), the pressure ring (12) and the pressure cap (13).

6. A simplified wellhead for cable passage according to claim 1, characterized in that: The casing (1) is connected to a casing bypass (14) at one end, and a valve (15) and a pressure gauge (16) are installed in the casing bypass (14).

7. A simplified wellhead for cable passage according to claim 6, characterized in that: The number of the bushing bypass (14) is set to two, and the two bushing bypasses (14) are installed symmetrically.

8. A simplified wellhead for cable passage according to claim 1, characterized in that: The outlet pipe (7) is equipped with a valve (15), a pressure gauge (16), a flow meter (17), and a sampling valve (18).

9. A simplified wellhead for cable passage according to claim 1, characterized in that: The spare pipe (8) is equipped with a valve (15).

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