Pressure testing device for safety valve of well completion tool

Abstract

The utility model discloses a well completion tool safety valve pressure testing device which comprises a base, a linear sliding rail, pressure heads, a pressure testing pipe, sliding blocks, rubber sealing sleeves, guide rods, a supporting frame, a cylinder base and a hydraulic cylinder, the linear sliding rail is fixedly installed on the base, the sliding blocks are fixedly installed at the bottoms of the two pressure heads, and the sliding blocks are further installed on the linear sliding rail in a sliding mode. According to the pressure testing device, the rubber sealing sleeves are pressed, sealed and fixed to the two ends of the pressure heads and the two ends of the spring barrel body respectively, the pressure testing device has the advantages of being high in clamping and fixing speed and sealing performance, the rubber sealing sleeves can be replaced according to the different sizes of the two ends of the spring barrel body, and the adaptation degree is high; the pressure testing device can meet the use requirements of clamping and pressure testing of spring tube bodies with safety valves in various lengths, and can perform multiple pressure testing on the opening and closing states of the valve plate of the safety valve, so that the accuracy of the pressure testing result can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure testing of well completion tools, in particular to a pressure testing device for a safety valve of a well completion tool. Background Art

[0002] If the casing of the completion tool leaks during the oil extraction process, high-pressure gas will enter the shallow loose formation, and the formation fluid will be out of control, causing pollution to the ground environment and groundwater resources. In order to ensure safe production, all oil wells with self-flowing or self-overflowing capabilities must be installed with downhole safety valves during the completion operation. The reliability of the safety valve needs to be pressure tested after being assembled in the spring cylinder. Since there are many sizes and models of spring cylinders used for safety valve assembly, the existing pressure test device does not have high versatility. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a pressure testing device for a safety valve of a completion tool with fast clamping and positioning speed and high universality.

[0004] In order to solve the above technical problems, the present invention is realized through the following technical solutions: a completion tool safety valve pressure test device, including a base, a linear slide rail, a pressure head, a pressure test tube, a slider, a rubber sealing sleeve, a guide rod, a support frame, a cylinder seat and a hydraulic cylinder, the linear slide rail is fixedly installed on the base, the slider is fixedly installed on the bottom of the two pressure heads, the slider is also slidably installed on the linear slide rail, the pressure head is coaxially and jointly provided with a frustum hole and a cylindrical hole, the pressure test tube is sealed and fixedly installed in the cylindrical hole of the pressure head, and the outer surface of the rubber sealing sleeve is provided to match the frustum hole. A conical structure, the inner end surface of the rubber sealing sleeve is provided with a limit hole through-hole structure matching with the two ends of the spring tube body, the cylinder seat is fixedly installed at the left and right ends of the base, the hydraulic cylinder is fixedly installed on the cylinder seat, the support frame is fixedly installed at the outer end of the pressure head, and a first mounting hole is provided on the support frame, the first mounting hole is coaxially arranged with the cylindrical hole of the pressure head, the outer end of the piston rod of the hydraulic cylinder is fixedly installed in the first mounting hole of the support frame, the guide rod is rectangularly distributed, and its left end is fixedly installed in the pressure head on the left, and the right end of the guide rod is slidably installed in the pressure head on the right.

[0005] Preferably, the right end of the guide rod is configured as a spherical structure, and a stop ring is fixedly sleeved and installed on the right end of the guide rod.

[0006] Preferably, the support frame is screwed and fixedly mounted on the outer end of the pressure head.

[0007] Preferably, an internal thread is provided in the cylindrical hole of the pressure head, and the pressure test tube is threaded and sealed and fixedly installed in the cylindrical hole of the pressure head through its external thread.

[0008] Compared with the prior art, the advantages of the utility model are as follows: the pressure testing device is respectively pressed and sealed with the pressure head and the two ends of the spring cylinder body by the rubber sealing sleeve, and has the advantages of fast clamping and fixing speed and high sealing performance; the rubber sealing sleeve can be replaced according to the different sizes of the two ends of the spring cylinder body, and has the advantage of high adaptability; the two pressure heads can slide along the linear slide rail through the slider, and can meet the use requirements of clamping and pressure testing of spring cylinder bodies with safety valves of various lengths and sizes; the pressure testing device can perform multiple pressure tests on the opening and closing states of the safety valve plate, thereby ensuring the accuracy of the pressure test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model is further described below in conjunction with the accompanying drawings.

[0010] Figure 1 It is a schematic diagram of the internal structure of the utility model. DETAILED DESCRIPTION

[0011] The utility model is described in detail below in conjunction with specific implementation methods:

[0012] like Figure 1 The safety valve pressure test device of a completion tool shown in the figure comprises a base 1, a linear slide rail 2, a pressure head 3, a pressure test tube 32, a slider 4, a rubber sealing sleeve 5, a guide rod 6, a support frame 7, a cylinder seat 8 and a hydraulic cylinder 9. The linear slide rail 2 is fixedly mounted on the base 1, and the sliders 4 are fixedly mounted on the bottom of the two pressure heads 3. The sliders 4 are also slidably mounted on the linear slide rail 2. The pressure heads 3 are coaxially provided with a frustum hole 31 and a cylindrical hole. The pressure test tube 32 is sealed and fixedly mounted in the cylindrical hole of the pressure head 3. The outer surface of the rubber sealing sleeve 5 is provided with a conical surface structure matching the frustum hole 31. The inner end surface of the rubber sealing sleeve 5 is provided with a limit hole through-hole structure that matches with the two ends of the spring cylinder body 10, the cylinder seat 8 is fixedly installed at the left and right ends of the base 1, the hydraulic cylinder 9 is fixedly installed on the cylinder seat 8, the support frame 7 is fixedly installed at the outer end of the pressure head 3, and a first mounting hole is provided on the support frame 7. The first mounting hole is coaxially arranged with the cylindrical hole of the pressure head 3, the outer end of the piston rod of the hydraulic cylinder 9 is fixedly installed in the first mounting hole of the support frame 7, the guide rod 6 is distributed in a rectangular shape, and its left end is fixedly installed in the pressure head 3 on the left, and the right end of the guide rod 6 is slidably installed in the pressure head 3 on the right.

[0013] The right end of the guide rod 6 is set to a spherical structure. The spherical structure can facilitate the right end of the guide rod 6 to easily slide and embed into the pressure head 3 on the right side to achieve a guiding effect, and a stop ring 61 is fixedly installed on the right end of the guide rod 6. The stop ring 61 can limit the distance between the pressure heads 3 on the left and right sides to prevent the hydraulic cylinder 9 from squeezing and damaging the spring tube body 10 due to excessive stroke.

[0014] The support frame 7 is screwed and fixedly installed at the outer end of the pressure head 3. After the support frame 7 is squeezed, damaged and deformed during long-term use, the screwed installation method makes it easy to disassemble and replace the support frame 7.

[0015] The cylindrical hole of the pressure head 3 is provided with an internal thread, and the connecting section of the pressure test tube 32 is provided with an external thread. The pressure test tube 32 is screwed and sealed and fixedly installed in the cylindrical hole of the pressure head 3 through its external thread. The screw installation has the advantages of simple structure and easy installation.

[0016] The two rubber sealing sleeves 5 of the adapting structure are respectively sleeved and installed on the hydraulic sleeves and the lower joints at both ends of the spring cylinder body 10. The middle through hole of the rubber sealing sleeve 5 is connected to the cylindrical hole of the pressure test tube 32. The starting hydraulic cylinder 9 pushes the pressure head 3 to approach the spring cylinder body 10. The rubber sealing sleeve 5 is embedded in the cone hole 31 of the pressure head 3. The pressure test tube 32 at the right end is connected to the water pressure station through a pipeline, and a pressure gauge is arranged on the pipeline of the pressure test tube 32 at the right end. The pressure test tube 32 at the left end is connected to the water storage tank through a pipeline. A flow meter is arranged on the pipeline of the pressure test tube 32 at the left end. After water pressure is injected into the safety valve, the valve plate 101 is displaced to the right through the internal flow channel pipe to overcome the elastic force of the torsion spring and open. When the valve plate 101 of the safety valve is in the open state, the water pressure station injects water into the spring cylinder body 10 through the pressure test tube 32 at the right end, and judges whether the valve plate 101 blocks the water flow by the flow value of the flow meter. After closing the water pressure in the safety valve, the valve plate 101 is reset and closed under the action of the torsion spring. Observe the values ​​of the pressure gauge and flow meter to determine the sealing performance of the safety valve 101.

Claims

1. A pressure test device for a well completion tool safety valve, characterized in that: The invention comprises a base (1), a linear slide rail (2), a pressure head (3), a pressure test tube (32), a slider (4), a rubber sealing sleeve (5), a guide rod (6), a support frame (7), a cylinder seat (8) and a hydraulic cylinder (9), wherein the linear slide rail (2) is fixedly mounted on the base (1), the sliders (4) are fixedly mounted on the bottom of the two pressure heads (3), the sliders (4) are also slidably mounted on the linear slide rail (2), the pressure head (3) is coaxially provided with a frustum hole (31) and a cylindrical hole, the pressure test tube (32) is sealed and fixedly mounted in the cylindrical hole of the pressure head (3), the outer surface of the rubber sealing sleeve (5) is provided with a conical surface structure matching the frustum hole (31), and the rubber The inner end surface of the sealing sleeve (5) is provided with a limit hole through-hole structure that matches with the two ends of the spring cylinder body (10); the cylinder seat (8) is fixedly mounted on the left and right ends of the base (1); the hydraulic cylinder (9) is fixedly mounted on the cylinder seat (8); the support frame (7) is fixedly mounted on the outer end of the pressure head (3); the support frame (7) is provided with a first mounting hole, the first mounting hole is coaxially arranged with the cylindrical hole of the pressure head (3); the outer end of the piston rod of the hydraulic cylinder (9) is fixedly mounted in the first mounting hole of the support frame (7); the guide rod (6) is distributed in a rectangular shape, the left end of which is fixedly mounted in the pressure head (3) on the left side, and the right end of the guide rod (6) is slidably mounted in the pressure head (3) on the right side.

2. The completion tool safety valve pressure testing device according to claim 1, characterized in that: The right end of the guide rod (6) is configured as a spherical structure, and a stop ring (61) is fixedly sleeved and installed on the right end of the guide rod (6).

3. The pressure testing device for the safety valve of the completion tool according to claim 1, characterized in that: The support frame (7) is screwed and fixedly mounted on the outer end of the pressure head (3).

4. The completion tool safety valve pressure testing device according to claim 1, characterized in that: An internal thread is provided in the cylindrical hole of the pressure head (3), and the pressure test tube (32) is threadedly sealed and fixedly installed in the cylindrical hole of the pressure head (3) through its external thread.

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