Overall pressure maintaining equipment in oil field pipe

Abstract

The invention discloses integral pressure maintaining equipment in an oil field pipe, and belongs to the field of oil field pressure maintaining equipment.The integral pressure maintaining equipment in the oil field pipe comprises a limiting assembly, a pressure maintaining assembly and a pressure maintaining assembly, and the limiting assembly is rotationally installed in an inner cavity of the oil field pipe; the plugging assembly is rotationally mounted in an inner cavity of the limiting assembly, and the plugging assembly is used for plugging the inner cavity of the limiting assembly; the device comprises a limiting assembly and a thrust assembly, the thrust assembly is rotationally installed on the outer wall of the limiting assembly, the thrust assembly is used for thrust of the limiting assembly, the limiting assembly comprises a short section pipe, the outer wall of the short section pipe is provided with a first external thread, and the inner wall of the short section pipe is provided with a first internal thread; first clamping grooves are annularly formed in the surface of the top of the short section pipe, second clamping grooves are annularly formed in the surface of the bottom of the short section pipe, and the number of the first clamping grooves is four, and the number of the second clamping grooves is four. When the pressure stabilizing test is carried out on the installed Christmas tree, the cost is saved, the environment is protected, and the construction progress is accelerated.

Description

Technical Field

[0001] The invention relates to the field of oilfield pressure-maintaining equipment, and more particularly to an integral pressure-maintaining equipment in an oilfield pipe. Background Art

[0002] At present, there is a technology for testing the pressure of the oil pipe plug, which performs the pressure test of the oil tree by pressurizing and expanding. After the pressure is released, the shrinkage of the rubber barrel is uncontrollable, and it cannot be guaranteed that the expanded rubber barrel can be successfully removed. At the same time, the maximum working pressure cannot exceed 50MPa, which cannot meet the pressure test requirements of the oil tree of the fracturing well exceeding 50Mpa. The oil tree pressure tester used in some domestic oil fields adopts a lifting short section to connect the check valve to perform the overall pressure test of the oil tree. Since the outer diameter of the lifting short section used needs to match the check valve short section, during the experiment, if the pressure test short section is deformed under pressure, the oil tree wellhead cannot be successfully lifted out. As a result, the oil tree will be disassembled again and the pressure test check valve will be taken out, which increases the workload and causes rework of the process.

[0003] In downhole well repair, oil testing, perforation and fracturing operations, the Christmas tree is an important safety production equipment at the wellhead of oil and gas wells. The quality of its components and sealing parts is directly related to the safety of oil and gas wells, equipment safety, construction safety and the success of fracturing. Therefore, in the construction project, every time the wellhead device is replaced or installed, it must be pressure tested. Only after the test is qualified can the next step of construction be carried out.

[0004] However, in the oil testing, perforating and fracturing processes, tools such as perforating guns cannot be directly pressure tested in the wellbore for inspection. There is a "safety blind spot" where the connection between the Christmas tree and the tubing head cannot be tested separately. In the past, the Christmas tree was installed and perforated directly. When the Christmas tree was installed, the inspection was not in place, and the flange steel ring groove or steel ring was not found to be damaged, or the operating personnel did not tighten the bolts when installing the Christmas tree, or the Christmas tree could not be directly pressure tested and sealed when installing the fracturing Christmas tree, which led to oil and gas leakage at the wellhead, well control hazards, and even accidents. Therefore, we proposed an integral pressure maintaining equipment in the oilfield pipe to solve the above problems. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide an integral pressure-maintaining device in an oilfield pipe, which can save costs, protect the environment and improve the construction progress when performing a pressure stabilization test on an installed Christmas tree.

[0007] 2. Technical solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] An integral pressure-maintaining device in an oilfield pipe, comprising:

[0010] A limit assembly, the limit assembly being rotatably mounted in the inner cavity of the oilfield pipe;

[0011] A blocking component, the blocking component is rotatably mounted in the inner cavity of the limiting component, and the blocking component is used to block the inner cavity of the limiting component; and

[0012] A thrust stop assembly is rotatably mounted on the outer wall of the position limiting assembly and is used for stopping the thrust of the position limiting assembly.

[0013] Furthermore, the position limiting assembly includes a short tube, the outer wall of the short tube is provided with a first external thread, and the inner wall of the short tube is provided with a first internal thread;

[0014] A first clamping groove is arranged on the top surface of the short tube section, and a second clamping groove is arranged on the bottom surface of the short tube section.

[0015] Furthermore, the number of the first card slots and the number of the second card slots are four, and each of the first card slots corresponds to each of the second card slots one by one.

[0016] Furthermore, the plugging assembly includes a plug, the outer wall surface of the plug is provided with a second external thread, and the second external thread is rotatably connected to the first internal thread;

[0017] A positioning column is arranged in the middle of the top surface of the plug, and claws are integrally formed in the middle of both side walls of the positioning column.

[0018] Furthermore, the thrust assembly includes an anti-retraction ring, the inner wall of the anti-retraction ring is provided with a second internal thread, the outer wall of the anti-retraction ring is provided with a third groove, and four third grooves are provided.

[0019] Furthermore, it also includes a first disassembly component, which is arranged at the top of the blocking component, and the bottom end of the first disassembly component is engaged and connected with the top of the blocking component, and the first disassembly component is used to disassemble the blocking component.

[0020] Furthermore, the first disassembly assembly includes a connecting rod, a plug hole is provided at the bottom end of the connecting rod, notches are provided on both sides of the bottom end of the connecting rod, and the two notches are conductively connected to the plug hole, and claw grooves for engaging claws are provided at the top of one side of the two notches;

[0021] A groove is provided in the middle of the top of the inner cavity of the jack, and a magnet block is arranged in the inner cavity of the groove.

[0022] Furthermore, the tops of both side walls of the connecting rod are provided with receiving grooves, the inner cavities of the two receiving grooves are provided with handles, and the tops of the two handles are movably connected to the connecting rod through shafts;

[0023] Buckle grooves are provided at the lower positions of the side walls of the two receiving grooves, and through holes are provided at the side walls of the two handles near the bottom ends.

[0024] Furthermore, it also includes a second disassembly component, which is arranged above the limiting component, and the bottom end of the second disassembly component is engaged and connected with the top end of the limiting component, and the second disassembly component is used to disassemble the limiting component.

[0025] Furthermore, the second disassembly assembly includes a plurality of clamps arranged around the bottom end of the outer wall of the positioning ring, and the clamps are connected to the first clamping groove by clamping;

[0026] A positioning groove is formed on the periphery of the top surface of the first slot, and three positioning grooves are provided.

[0027] 3. Beneficial effects

[0028] Compared with the prior art, the advantages of the present invention are:

[0029] In this solution, when maintaining the overall pressure inside the oil field pipe, first install the limit assembly on the tubing hanger as the basic connector for installing the device, use the second disassembly assembly to tighten the limit assembly, and then install the thrust assembly to ensure that after the pressure test is completed, the limit assembly will not be loosened when the plugging assembly is disassembled, thereby increasing the sealing performance;

[0030] After the installation of the limit assembly is completed, the plugging assembly is installed and tightened, and the Christmas tree is installed. The entire Christmas tree pressure test device is installed, and the storage pressure gauge is preset in the Christmas tree to record the pressure changes in the Christmas tree during the pressure test. Next, the Christmas tree with more than four-way can be pressure tested on site according to the pressure test requirements of the construction well to ensure that the airtightness of the Christmas tree meets the well control requirements of the operating well;

[0031] When the pressure test is completed, use the first disassembly component to enter the well from the wax cleaning gate, connect the special opening position of the first disassembly component with the disassembly fulcrum of the sealing component, rotate the connecting rod counterclockwise, and then use the disassembly connecting rod hanging ear to hang the plug fulcrum to lift out the plugging component for pressure test from the wax cleaning gate. Finally, after the Christmas tree is fully assembled and pressure tested on site, it will not affect the subsequent construction, providing well control guarantee for perforating, fracturing and oil testing construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention;

[0033] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0034] Figure 3 It is a schematic diagram of the structure of the limit assembly of the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of the plugging assembly of the present invention;

[0036] Figure 5 It is a schematic diagram of the structure of the first disassembly assembly of the present invention;

[0037] Figure 6 It is a schematic diagram of the bottom structure of the first disassembly component of the present invention;

[0038] Figure 7 It is a schematic diagram of the handle structure of the present invention;

[0039] Figure 8 It is a schematic diagram of the thrust assembly structure of the present invention;

[0040] Fig. 9 It is a schematic diagram of the structure of the second disassembly component of the present invention.

[0041] Description of the numbers in the figure:

[0042] 1. Limiting assembly; 11. Short tube; 12. First external thread; 13. First internal thread; 14. First clamping groove; 15. Second clamping groove; 2. Blocking assembly; 21. Plug; 22. Second external thread; 23. Positioning column; 24. Claw; 3. First disassembly assembly; 31. Connecting rod; 32. Notch; 33. Claw groove; 34. Groove; 35. Magnet block; 36. Accommodating groove; 37. Handle; 38. Shaft; 39. Buckle groove; 310. Through hole; 4. Thrust assembly; 41. Anti-retraction ring; 42. Second internal thread; 43. Third clamping groove; 5. Second disassembly assembly; 51. Positioning ring; 52. Clamp; 53. Positioning groove. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0044] Example:

[0045] See also Figure 1-2 and Fig. 9, an integral pressure-maintaining device in an oilfield pipe, comprising: a limit assembly 1, the limit assembly 1 is rotatably mounted in the inner cavity of the oilfield pipe; a plugging assembly 2, the plugging assembly 2 is rotatably mounted in the inner cavity of the limit assembly 1, and the plugging assembly 2 is used to plug the inner cavity of the limit assembly 1; and a thrust assembly 4, the thrust assembly 4 is rotatably mounted on the outer wall of the limit assembly 1, and the thrust assembly 4 is used to thrust the limit assembly 1, a second disassembly assembly 5, the second disassembly assembly 5 is arranged above the limit assembly 1, the bottom end of the second disassembly assembly 5 is connected to the top end of the limit assembly 1 by clamping, and the second disassembly assembly 5 is used to disassemble the limit assembly 1, and also includes a first disassembly assembly 3, the first disassembly assembly 3 is arranged at the top end of the plugging assembly 2, and the bottom end of the first disassembly assembly 3 is connected to the top end of the plugging assembly 2 by clamping, and the first disassembly assembly 3 is used to disassemble the plugging assembly 2;

[0046] When maintaining the overall pressure inside the oil field pipe, first install the limit component 1 on the tubing hanger as the basic connector for installing the device, use the second disassembly component 5 to tighten the limit component 1, and then install the thrust component 4 to ensure that after the pressure test is completed, the limit component 1 will not be loosened when the plugging component 2 is disassembled, thereby increasing the sealing performance; when the limit component 1 is installed, the plugging component 2 is installed and tightened, and the Christmas tree is installed. The installation of the entire Christmas tree pressure test device is completed, and the storage pressure gauge is preset in the Christmas tree to record the pressure changes in the Christmas tree during the pressure test. Next, according to the pressure test requirements of the construction well, the Christmas trees with large four-way and above can be pressure tested on site to ensure that the airtightness of the Christmas tree meets the well control requirements of the operating well; when the pressure test is completed, the first disassembly component 3 is used to enter the well from the wax cleaning gate, and the special opening position of the first disassembly component 3 is connected with the disassembly fulcrum of the sealing component 2. The connecting rod is rotated counterclockwise, and then the plugging component 2 for pressure test is lifted out from the wax cleaning gate with the disassembly connecting rod hanging ear and the plug fulcrum. Finally, after the Christmas tree is fully assembled on site and pressure tested, it will not affect the subsequent construction, providing well control guarantee for perforating, fracturing and oil testing construction.

[0047] See also Figure 2 , Figure 3 The limiting component 1 includes a short tube 11, the outer wall of the short tube 11 is provided with a first external thread 12, and the inner wall of the short tube 11 is provided with a first internal thread 13; the top surface of the short tube 11 is ringed with a first groove 14, and the bottom surface of the short tube 11 is ringed with a second groove 15; through the short tube 11 in the limiting component 1, a space can be provided for the first external thread 12, the first internal thread 13, the first groove 14 and the second groove 15, and then the short tube 11 can be conveniently rotatably installed in the inner cavity of the oil pipe hanger through the first external thread 12, and the plugging component 2 can be rotatably installed through the first internal thread 13, and then the first groove 14 and the second groove 15 can be conveniently engaged with the second disassembly component 5 by the staff, so that the short tube 11 can be disassembled and assembled, thereby improving the convenience of using the short tube 11.

[0048] See also Figure 3 There are four first card slots 14 and four second card slots 15, and each first card slot 14 corresponds to each second card slot 15, which makes it convenient for the first card slot 14 and the second card slot 15 to correspond to the second disassembly component 5, and then makes it convenient for the second disassembly component 5 to be engaged and connected with them.

[0049] See also Figure 2 , Figure 4 The plugging component 2 includes a plug 21, and a second external thread 22 is provided on the outer wall surface of the plug 21, and the second external thread 22 is rotatably connected to the first internal thread 13; a positioning column 23 is provided in the middle of the top surface of the plug 21, and claws 24 are integrally formed in the middle of the two side walls of the positioning column 23; through the plug 21 in the plugging component 2, a space can be provided for the second external thread 22, and the second external thread 22 can be rotatably connected to the first internal thread 13 on the short section pipe 11, so that the plug 21 can block the short section pipe 11, and at the same time, the plug 21 can install the positioning column 23. Since the middle of the two side walls of the positioning column 23 are integrally formed with claws 24, the positioning column 23 can be conveniently engaged and connected with the first disassembly component 3, and the plug 21 can be disassembled by rotating the first disassembly component 3.

[0050] See also Figure 2 , Figure 8 The thrust assembly 4 includes an anti-retraction ring 41, a second internal thread 42 is provided on the inner wall of the anti-retraction ring 41, a third clamping groove 43 is provided on the outer wall of the anti-retraction ring 41, and four third clamping grooves 43 are provided; through the anti-retraction ring 41 in the thrust assembly 4, a space can be provided for the second internal thread 42 and the four third clamping grooves 43, and the second internal thread 42 can be rotatably connected with the first external thread 12 on the short-section pipe 11, so that the short-section pipe 11 can be limited and thrusted, and then it can be ensured that after the pressure test is completed, when the plug 21 is removed, the short-section pipe 11 will not be loosened, thereby increasing the sealing performance.

[0051] See also Figure 2 , Figure 5 and Figure 6The first disassembly component 3 includes a connecting rod 31, a socket is formed at the bottom of the connecting rod 31, notches 32 are formed on both sides of the bottom of the connecting rod 31, and the two notches 32 are conductively connected to the socket, and a claw groove 33 for engaging the claw 24 is formed at the top of one side of the two notches 32; a groove 34 is formed in the middle of the top of the inner cavity of the socket, and a magnet block 35 is provided in the inner cavity of the groove 34; through the connecting rod 31 in the first disassembly component 3, space can be provided for the socket, the notch 32 and the claw groove 33, and it is convenient for the user to bypass the notch 32 and engage the claw 24 in the claw groove 3 3, so that the plug 21 can be rotated synchronously when the user rotates the connecting rod 31, so that the plug 21 can be removed. Since a groove 34 is opened in the middle of the top of the inner cavity of the jack, and a magnet block 35 is arranged in the inner cavity of the groove 34, it is convenient for the connecting rod 31 to install the magnet block 35 through the groove 34, so that the magnetic positioning effect can be achieved, so that the magnetic positioning docking point can be installed at the groove 34 of the connecting rod 31 as a docking positioning mark between the connecting rod and the plug holder, which is convenient for disassembly of the groove 34 and the plug 21 to achieve accurate positioning.

[0052] See also Figure 5 , Figure 6 and Figure 7 , the top of the two side walls of the connecting rod 31 is provided with a receiving groove 36, the inner cavities of the two receiving grooves 36 are provided with handles 37, and the tops of the two handles 37 are movably connected to the connecting rod 31 through the shaft 38; the lower position of the side walls of the two receiving grooves 36 is provided with a buckle groove 39, and the side walls of the two handles 37 are provided with a through hole 310 near the bottom end; through the receiving groove 36, the handle 37 can be rotatably installed through the shaft 38, and the handle 37 can be stored. Through the handle 37, it is convenient for the user to rotate the connecting rod 31, and then the plug 21 can be disassembled. Since the buckle groove 39 is provided at the lower position of the side wall of the receiving groove 36, and the through hole 310 is provided on the side wall of the handle 37 near the bottom end, it is convenient for the user to buckle the handle 37 out of the receiving groove 36, and then the handle 37 can be used.

[0053] See also Figure 2 , Fig. 9 The second disassembly component 5 includes a positioning ring 51, and four clamping heads 52 are arranged on the bottom end of the outer wall, and the clamping heads 52 are connected with the first clamping groove 14 by clamping; a positioning groove 53 is arranged on the peripheral side of the top surface of the first clamping groove 14, and three positioning grooves 53 are arranged; through the positioning ring 51 in the second disassembly component 5, the four clamping heads 52 can be installed, and space can be provided for the three positioning grooves 53. Through the four clamping heads 52, the first clamping groove 14 and the second clamping groove 15 on the short section pipe 11 can be conveniently connected by clamping, so that the positioning ring 51 can be conveniently rotated while synchronously driving the short section pipe 11 to rotate and disassemble; through the three positioning grooves 53, three-point force can be adopted, which is scientific and labor-saving, and the operation force points can be adjusted at multiple angles, so that the force direction can be conveniently adjusted, and the operation space is not restricted.

[0054] When in use: when maintaining the overall pressure inside the oil field pipe, first install the limit assembly 1 on the tubing hanger as the basic connector for installing the device, use the second disassembly assembly 5 to tighten the limit assembly 1, and then install the thrust assembly 4 to ensure that after the pressure test is completed, the limit assembly 1 will not be loosened when the plugging assembly 2 is disassembled, thereby increasing the sealing performance; when the limit assembly 1 is installed, the plugging assembly 2 is installed and tightened, and the Christmas tree is installed. The installation of the entire Christmas tree pressure test device is completed, and the storage pressure gauge is preset in the Christmas tree to record the pressure changes in the Christmas tree during the pressure test. If the situation is correct, then the Christmas tree with more than four-way can be pressure tested on site according to the pressure test requirements of the construction well to ensure that the airtightness of the Christmas tree meets the well control requirements of the operating well; when the pressure test is completed, the first disassembly component 3 is used to enter the well from the wax cleaning gate, and the special opening position of the first disassembly component 3 is connected with the disassembly fulcrum of the plugging component 2, and the connecting rod is rotated counterclockwise, and then the plugging component 2 for pressure test is lifted out from the wax cleaning gate with the disassembly connecting rod hanging ear and the plug fulcrum, and finally the Christmas tree is fully assembled on site for pressure testing, which does not affect the subsequent construction, and provides well control guarantee for perforation, fracturing and oil testing construction;

[0055] Through the short tube 11 in the limit assembly 1, a space can be provided for the first external thread 12, the first internal thread 13, the first clamping groove 14 and the second clamping groove 15. Then, through the first external thread 12, the short tube 11 can be conveniently rotatably installed in the inner cavity of the tubing hanger, and through the first internal thread 13, the plugging assembly 2 can be rotatably installed. Then, through the first clamping groove 14 and the second clamping groove 15, it is convenient for the staff to engage the second disassembly assembly 5, so that the short tube 11 can be disassembled and assembled, thereby improving the convenience of using the short tube 11.

[0056] The plug 21 in the plugging assembly 2 can provide a space for the second external thread 22, and can be rotatably connected to the first internal thread 13 on the short-joint tube 11 through the second external thread 22, so that the plug 21 can block the short-joint tube 11, and at the same time, the plug 21 can install the positioning column 23. Since the middle part of the two side walls of the positioning column 23 is integrally formed with claws 24, it is convenient to engage the positioning column 23 with the first disassembly assembly 3, so that the plug 21 can be disassembled by rotating the first disassembly assembly 3; the anti-retraction ring 41 in the thrust assembly 4 can provide a space for the second internal thread 42 and the four third clamping grooves 43, and the second internal thread 42 can be rotatably connected to the first external thread 12 on the short-joint tube 11, so that the short-joint tube 11 can be limited and thrusted, so that after the pressure test is completed, it can be ensured that the short-joint tube 11 will not be loosened when the plug 21 is disassembled, thereby increasing the sealing;

[0057] The connecting rod 31 in the first disassembly component 3 can provide space for the jack, the notch 32 and the claw groove 33, and can also facilitate the user to bypass the notch 32 and engage the claw 24 in the inner cavity of the claw groove 33, so that the plug 21 can be rotated synchronously when the user rotates the connecting rod 31, so that the plug 21 can be disassembled. Since a groove 34 is provided in the middle part of the top of the inner cavity of the jack, and a magnet block 35 is provided in the inner cavity of the groove 34, it is convenient for the connecting rod 31 to install the magnet block 35 through the groove 34, so that the magnetic positioning effect can be achieved, so that the magnetic positioning docking point can be installed on the connecting rod 31 The groove 34 is used as a docking and positioning mark for the connecting rod and the plug holder, which is convenient for disassembly of the groove 34 and the plug 21, and realizes accurate positioning; through the receiving groove 36, the handle 37 can be rotated and installed through the shaft 38, and the handle 37 can be stored. Through the handle 37, it is convenient for the user to rotate the connecting rod 31, and then the plug 21 can be disassembled. Since the side wall of the receiving groove 36 is provided with a buckle groove 39 at the lower position, and the side wall of the handle 37 and the position near the bottom end are provided with a through hole 310, it is convenient for the user to buckle the handle 37 from the receiving groove 36, and then the handle 37 can be used;

[0058] Through the positioning ring 51 in the second disassembly component 5, the four clamps 52 can be installed and space can be provided for the three positioning grooves 53. Through the four clamps 52, the first clamping groove 14 and the second clamping groove 15 on the short section pipe 11 can be conveniently engaged and connected, so that the positioning ring 51 can be conveniently rotated while simultaneously driving the short section pipe 11 to rotate and disassemble. Through the three positioning grooves 53, three-point force can be adopted to achieve scientific and labor-saving, multi-angle adjustment of the operation force point, and convenient adjustment of the force direction, and the operation space is not restricted.

[0059] The above are only preferred specific implementations of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An integral pressure-maintaining device in an oilfield pipe, characterized in that: include: A limit assembly (1), the limit assembly (1) being rotatably mounted in the inner cavity of the oilfield pipe; A blocking component (2), the blocking component (2) being rotatably mounted in the inner cavity of the limiting component (1), and the blocking component (2) being used to block the inner cavity of the limiting component (1); as well as A thrust stop assembly (4), wherein the thrust stop assembly (4) is rotatably mounted on the outer wall of the position limiting assembly (1), and the thrust stop assembly (4) is used to stop the thrust of the position limiting assembly (1).

2. The oilfield pipe integral pressure-maintaining device according to claim 1, characterized in that: The limiting assembly (1) comprises a short tube (11), the outer wall of the short tube (11) is provided with a first external thread (12), and the inner wall of the short tube (11) is provided with a first internal thread (13); The top surface of the short tube section (11) is provided with a first clamping groove (14), and the bottom surface of the short tube section (11) is provided with a second clamping groove (15).

3. The oilfield pipe integral pressure-maintaining device according to claim 2, characterized in that: Four of the first card slots (14) and the second card slots (15) are provided, and each of the first card slots (14) corresponds to each of the second card slots (15) one by one.

4. The oilfield pipe integral pressure-maintaining device according to claim 2, characterized in that: The plugging assembly (2) comprises a plug (21), the outer wall surface of the plug (21) is provided with a second external thread (22), and the second external thread (22) is rotatably connected to the first internal thread (13); A positioning column (23) is provided in the middle of the top surface of the plug (21), and claws (24) are integrally formed in the middle of both side walls of the positioning column (23).

5. The oilfield pipe integral pressure-maintaining equipment according to claim 1, characterized in that: The thrust assembly (4) comprises an anti-retraction ring (41), the inner wall of the anti-retraction ring (41) is provided with a second internal thread (42), the outer wall of the anti-retraction ring (41) is provided with a third clamping groove (43) on the peripheral side, and four third clamping grooves (43) are provided.

6. The oilfield pipe integral pressure-maintaining device according to claim 4, characterized in that In: It also comprises a first disassembly component (3), which is arranged at the top end of the blocking component (2), and the bottom end of the first disassembly component (3) is connected to the top end of the blocking component (2) by snapping, and the first disassembly component (3) is used to disassemble the blocking component (2).

7. The oilfield pipe integral pressure-maintaining equipment according to claim 6, characterized in that: The first disassembly assembly (3) comprises a connecting rod (31), a plug hole is provided at the bottom end of the connecting rod (31), notches (32) are provided on both sides of the bottom end of the connecting rod (31), and the two notches (32) are both conductively connected to the plug hole, and claw grooves (33) for engaging the claws (24) are provided at the top of one side of the two notches (32); A groove (34) is provided in the middle of the top end of the inner cavity of the jack, and a magnet block (35) is provided in the inner cavity of the groove (34).

8. The oilfield pipe integral pressure-maintaining device according to claim 7, characterized in that: The top of both side walls of the connecting rod (31) is provided with a receiving groove (36), the inner cavities of the two receiving grooves (36) are provided with handles (37), and the top ends of the two handles (37) are movably connected to the connecting rod (31) through a shaft (38); Buckle grooves (39) are provided at the lower positions of the side walls of the two receiving grooves (36), and through holes (310) are provided at the side walls of the two handles (37) near the bottom ends.

9. The oilfield pipe integral pressure-maintaining equipment according to claim 2, characterized in that: It also comprises a second disassembly component (5), which is arranged above the limiting component (1), the bottom end of the second disassembly component (5) is engaged and connected with the top end of the limiting component (1), and the second disassembly component (5) is used to disassemble the limiting component (1).

10. The oilfield pipe integral pressure-maintaining equipment according to claim 9, characterized in that: The second disassembly assembly (5) comprises a positioning ring (51) having a plurality of clamping heads (52) arranged around the bottom end of the outer wall thereof, and the clamping heads (52) are clamped and connected to the first clamping groove (14); A positioning groove (53) is provided on the peripheral side of the top surface of the first slot (14). Three slots (53) are provided.

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