Completion tool safety valve hydraulic cavity test joint installation structure
By adopting a tensioning structure and a limiting mechanism in the test joint of the completion tool safety valve, a rapid sealing connection between the test joint and the safety valve hydraulic interface is achieved, which solves the problem of low testing efficiency in the existing technology and improves safety. Valve testing efficiency.
Patent Information
- Application Number
- CN202421236745.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-06-03
AI Technical Summary
In the prior art, when testing the safety valve of the completion tool, the sealed raw material tape needs to be frequently replaced, resulting in inefficient testing and the sealing fixation between the hydraulic interface between the test joint and the safety valve cannot be quickly achieved.
Using a tensioning structure, pull the inner flow pipe to the left and tighten the bolts and nuts to achieve rapid sealing connection and fixation of the hydraulic interface of the test joint and the hydraulic sleeve. The structure includes the safety valve body, outer casing, inner flow tube, push plate, limit seal sleeve, thread sleeve, nut and limit mechanism. The limit mechanism and sealing ring are used to ensure tightness.
The rapid sealing connection between the test joint and the safety valve hydraulic interface is realized, which simplifies the operation and improves the efficiency of safety valve testing.
Smart Images
Figure CN222377571U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of well completion tool safety valve testing, in particular to a well completion tool safety valve hydraulic cavity testing joint installation structure. 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 completion tool safety valve and the hydraulic pipeline structure are installed in a screw-connected and sealed manner. At present, the safety valve is opened and closed by the test joint and the safety valve hydraulic interface. Since it is necessary to ensure the sealing of the connection between the test joint and the safety valve hydraulic interface, it is necessary to wrap the sealing raw tape around the test joint during each test, and then screw the test joint and the safety valve hydraulic interface together for sealing. After the test is completed, remove the damaged sealing raw tape and wrap a new sealing raw tape around it for the next test. The test time of a single completion tool safety valve is only within 10 minutes, so the test joint and the safety valve hydraulic interface do not need high connection sealing. The test efficiency of the screw connection with sealing raw tape is low. The outer end of the safety valve hydraulic interface is set to a cone hole structure, and the threaded hole at the inner end of the safety valve hydraulic interface is only set to 3-5cm. Therefore, shortening the test joint does not significantly improve the safety valve test efficiency. Summary of the invention
[0003] The technical problem to be solved by the utility model is to provide an installation structure which can quickly realize the sealing fixation of a test joint and a hydraulic interface of a safety valve through a tensioning structure.
[0004] In order to solve the above technical problems, the present invention is implemented through the following technical solutions: a completion tool safety valve hydraulic chamber test joint installation structure, including a safety valve body, an outer sleeve, an inner flow tube, a push plate, a limit sealing sleeve, a screw sleeve, a nut and a limit mechanism;
[0005] The safety valve body is provided with a hydraulic sleeve, a hydraulic cavity is provided in the hydraulic sleeve, a hydraulic interface connected to the outside is provided at the outer end of the hydraulic cavity, a first sealing ring is fixedly sleeved and installed on the outer wall of the inner flow tube, the inner flow tube is slidingly sealed and installed in the outer sleeve, the outer end of the outer sleeve is sealed and fixedly installed on the limit sealing sleeve, a second sealing ring is fixedly embedded and installed on the inner end surface of the limit sealing sleeve, the outer end of the inner flow tube is slidingly sealed and installed in the limit sealing sleeve, the screw sleeve is fixedly sleeved and installed on the inner flow tube, the screw sleeve has an external thread, and the nut is threadedly installed on the screw sleeve;
[0006] The limiting mechanism is composed of a limiting block, a guide rod, a tension spring and a limiting ring. Four limiting mechanisms are arranged in a ring array at the outer sleeve and the bottom end of the inner flow tube. The inner end of the inner flow tube is fixedly sleeved and installed with a limiting ring. The bottom end of the outer sleeve is provided with a vertical longitudinal guide groove and a transverse guide groove. The limiting block and the push plate are respectively slidably installed in the longitudinal guide groove and the transverse guide groove. The lower end of the push plate is fixedly connected to the limiting ring. The contact surfaces of the limiting block and the push plate are both set to a 45° inclined structure. The inner ends of the two guide rods are fixedly installed at the bottom of the longitudinal guide groove, and the outer end of the guide rod is slidably installed in the limiting block. The tension spring is sleeved and installed on the guide rod. The inner and outer ends of the tension spring are respectively fixedly connected to the bottom of the longitudinal guide groove and the limiting block.
[0007] Furthermore, a guide sleeve is fixedly embedded in the limit block, the outer end of the guide rod is slidably installed in the guide sleeve, and the outer end of the tension spring is fixedly connected to the guide sleeve.
[0008] Furthermore, the outer end of the guide rod is configured as a spherical structure.
[0009] Furthermore, the push plate is located at a central position between the two guide rods.
[0010] Compared with the prior art, the benefits of the present invention are as follows: the test joint installation structure can quickly seal and connect the test joint with the hydraulic interface of the hydraulic sleeve simply by pulling the inner flow tube to the left and tightening the bolts and nuts. It has the advantages of simple operation and fast connection speed, and can improve the testing efficiency of the safety valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The utility model is further described below in conjunction with the accompanying drawings.
[0012] Figure 1 It is a structural schematic diagram of the utility model.
[0013] Figure 2 yes Figure 1 Enlarged structural diagram at L.
[0014] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at M.
[0015] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at N. DETAILED DESCRIPTION
[0016] The utility model is described in detail below in conjunction with specific implementation methods:
[0017] like Figures 1 to 4The installation structure of a hydraulic chamber test joint of a completion tool safety valve shown in the figure comprises a safety valve body, an outer casing 2, an inner flow tube 3, a push plate 32, a limiting sealing sleeve 4, a threaded sleeve 5, a nut 6 and a limiting mechanism;
[0018] The safety valve body is provided with a hydraulic sleeve 1, a hydraulic chamber 101 is provided in the hydraulic sleeve 1, a hydraulic interface 102 connected to the outside is provided at the outer end of the hydraulic chamber 101, a first sealing ring is fixedly sleeved on the outer wall of the inner flow tube 3, the inner flow tube 3 is slidingly sealed and installed in the outer sleeve 2, the outer end of the outer sleeve 2 is sealed and fixedly installed on the limit sealing sleeve 4, a second sealing ring is fixedly embedded and installed on the inner end surface of the limit sealing sleeve 4, the outer end of the inner flow tube 3 is slidingly sealed and installed in the limit sealing sleeve 4, the screw sleeve 5 is fixedly sleeved and installed on the inner flow tube 3, the screw sleeve 5 has an external thread, and the nut 6 is threadedly installed on the screw sleeve 5; a frustum-shaped rubber sleeve matching the frustum-shaped hole at the outer end of the hydraulic interface 102 of the hydraulic sleeve 1 is fixedly sleeved on the outer sleeve 2, and the frustum-shaped rubber sleeve is crimped into the frustum-shaped hole at the outer end of the hydraulic interface 102 to improve the sealing between the outer sleeve 2 and the hydraulic interface 102;
[0019] The limiting mechanism is composed of a limiting block 7, a guide rod 8, a tension spring 9 and a limiting ring 31. Four limiting mechanisms are arranged in a ring array at the bottom ends of the outer sleeve 2 and the inner flow tube 3. The inner end of the inner flow tube 3 is fixedly sleeved and installed with a limiting ring 31. The bottom end of the outer sleeve 2 is provided with a vertically penetrating longitudinal guide groove 21 and a transverse guide groove. The limiting block 7 and the push plate 32 are respectively slidably installed in the longitudinal guide groove 21 and the transverse guide groove. The lower end of the push plate 32 is fixedly connected to the limiting ring 31. The contact surfaces of the limiting block 7 and the push plate 32 are both set to a 45° inclined structure. The inner ends of the two guide rods 8 are fixedly installed at the bottom of the longitudinal guide groove 21, and the outer ends of the guide rods 8 are slidably installed in the limiting block 7. The tension spring 9 is sleeved and installed on the guide rod 8. The inner and outer ends of the tension spring 9 are respectively fixedly connected to the bottom of the longitudinal guide groove 21 and the limiting block 7.
[0020] A guide sleeve 71 is fixedly embedded on the limit block 7, the outer end of the guide rod 8 is slidably installed in the guide sleeve 71, and the outer end of the tension spring 9 is fixedly connected to the guide sleeve 71. The accuracy of the guide hole inside the guide sleeve 71 is easier to process than the accuracy of the guide hole inside the limit block 7, and after the guide sleeve 71 is worn, it can be disassembled and replaced separately, thereby reducing maintenance costs.
[0021] The outer end of the guide rod 8 is configured as a spherical structure so that the outer end of the guide rod 8 can be easily slidably embedded in the limit block 7 .
[0022] The two guide rods 8 are symmetrically slidably installed on a limit block 7, and the push plate 32 is located in the center between the two guide rods 8 to ensure that when the push plate 32 pushes the limit block 7 to move, the force point of the limit block 7 is in the middle position, avoiding the problem of jamming when the limit block 7 is pushed and displaced by the guide rods 8.
[0023] The test joint consists of an outer sleeve 2, an inner flow tube 3, a push plate 32, a limit sealing sleeve 4, a threaded sleeve 5, a nut 6 and a limit mechanism. Before installing the test joint, loosen the nut 6, push the inner flow tube 3 to move to the right, and the push plate 32 moves to the right along the transverse guide groove to release the limiting effect of the push plate 32 on the limit block 7. The limit block 7 is reset inwardly under the action of the tension spring, and the limit block 7 is completely reset and immersed in the longitudinal guide groove 21 to avoid interference between the limit block 7 and the inner wall of the hydraulic interface 102 during installation. The test joint is slidably installed in the hydraulic interface 102 of the outer end connected to the hydraulic chamber 101 of the hydraulic sleeve 1, pulling the inner flow tube 3 to move to the left, and tightening the nut 6 synchronously, the push plate 32 moves to the left along the transverse guide groove, and after the push plate 32 and the limit block 7, the limit block 7 is pushed to overcome the tension of the tension spring 9 and extend outward until the limit block 7 is pressed and contacted with the bottom of the outer sleeve 2. At this time, the limit sealing sleeve 4 is pressed and fixed, and the outer sleeve 2 and the inner flow tube 3 are sealed by the first sealing ring. The outer sleeve 2, the limit sealing sleeve 4 and the hydraulic interface The ports 102 are sealed by a second sealing sleeve, and water pressure flows into the hydraulic chamber 101 of the hydraulic sleeve 1 through the inner flow tube 3. The water pressure pushes the fixed combination of the piston rod 12 and the flow tube 11 to overcome the compression of the spring 13 in the spring tube 10 and move to the right. The flow tube 11 pushes the valve plate 14 to overcome the torsion of its own torsion spring and rotate to open. After the test water pressure in the hydraulic chamber 101 of the hydraulic sleeve 1 is released, the valve plate 14 is reset and closed under the action of its own torsion spring. The operator tests the safety valve of the completion tool in this reciprocating manner.
Claims
1. A test joint installation structure for a hydraulic chamber of a completion tool safety valve, characterized in that: It comprises a safety valve body, an outer sleeve (2), an inner flow tube (3), a push plate (32), a limit sealing sleeve (4), a threaded sleeve (5), a nut (6) and a limit mechanism; The safety valve body comprises a hydraulic sleeve (1), a hydraulic chamber (101) is arranged in the hydraulic sleeve (1), a hydraulic interface (102) connected to the outside is arranged at the outer end of the hydraulic chamber (101), a first sealing ring is fixedly sleeved and installed on the outer wall of the inner flow tube (3), the inner flow tube (3) is slidably and sealably installed in the outer sleeve (2), the outer end of the outer sleeve (2) is sealably and fixedly installed on the limit sealing sleeve (4), a second sealing ring is fixedly and embeddedly installed on the inner end surface of the limit sealing sleeve (4), the outer end of the inner flow tube (3) is slidably and sealably installed in the limit sealing sleeve (4), the screw sleeve (5) is fixedly sleeved and installed on the inner flow tube (3), the screw sleeve (5) has an external thread, and the nut (6) is threadedly installed on the screw sleeve (5); The limiting mechanism comprises a limiting block (7), a guide rod (8), a tension spring (9) and a limiting ring (31). Four limiting mechanisms are arranged in a ring array at the bottom ends of the outer sleeve (2) and the inner flow tube (3). The inner end of the inner flow tube (3) is fixedly sleeved with the limiting ring (31). The bottom end of the outer sleeve (2) is provided with a vertically penetrating longitudinal guide groove (21) and a transverse guide groove. The limiting block (7) and the push plate (32) are respectively slidably mounted in the longitudinal guide groove (21) and the transverse guide groove. The push plate (32) is fixedly connected to the limit ring (31) at its lower end, and the contact surfaces of the limit block (7) and the push plate (32) are both arranged to have a 45° inclined surface structure. The inner ends of the two guide rods (8) are fixedly mounted on the bottom of the longitudinal guide groove (21), and the outer ends of the guide rods (8) are slidably mounted in the limit block (7). The tension spring (9) is sleeved and mounted on the guide rods (8), and the inner and outer ends of the tension spring (9) are respectively fixedly connected to the bottom of the longitudinal guide groove (21) and the limit block (7).
2. The installation structure of the hydraulic chamber test joint of the completion tool safety valve according to claim 1 is characterized in that: A guide sleeve (71) is fixedly embedded in the limit block (7), the outer end of the guide rod (8) is slidably mounted in the guide sleeve (71), and the outer end of the tension spring (9) is fixedly connected to the guide sleeve (71).
3. The installation structure of the hydraulic chamber test joint of the completion tool safety valve according to claim 1 is characterized in that: The outer end of the guide rod (8) is configured as a spherical structure.
4. The installation structure of the hydraulic chamber test joint of the completion tool safety valve according to claim 1, characterized in that: The push plate (32) is located at a central position between the two guide rods (8).