Oil pipe head with lining reinforcement mechanism

Abstract

The present invention relates to the technical field of tubing heads, and specifically to an tubing head with an inner lining reinforcement mechanism, comprising a lower flange arranged at the bottom of the tubing head body, an inner lining plate screwed inside the tubing head body, a placement groove arranged on the side of the inner lining plate, a protective pad arranged in the placement groove, and a screw rod screwed at one end of the tubing head body; the beneficial effects are as follows: first, the inner lining plate is screwed inside the tubing head body by means of the setting of the screw rod, and then the screw rod is rotated to make the vertical plate push the extrusion plate, and then the extrusion plate can be tilted to make one end of the extrusion plate rotate upward, and the upward rotation of the extrusion plate is used to make the rigid spring squeeze the protective pad arranged at one end, and the protective pad after extrusion is used to increase the sealing protection of the gap connecting the tubing head body and the lower flange, and then the inner lining plate can be used to support the tubing head body to improve the strength of the inner lining of the tubing head body, which is beneficial to improving the tolerance of the tubing head body to higher pressure.

Description

Technical Field

[0001] The invention relates to the technical field of tubing heads, in particular to a tubing head with an inner lining reinforcement mechanism. Background Art

[0002] The tubing head is a device component that connects the topmost casing head and the Christmas tree to suspend the tubing and seal the annular space between the tubing and the casing. The tubing head is located above the casing head and includes a casing spool and a tubing hanger. Its function is to suspend the tubing and downhole tools lowered into the well and seal the annular space between the tubing and the casing.

[0003] The authorization publication number CN201024912Y discloses a metal sealed oil pipe head, including a shell, an oil pipe hanger for hanging the oil pipe is installed on the upper part of the vertical hole of the shell, an upper flange is provided on the top of the shell, and a lower flange is provided on the bottom. The top of the shell and the upper flange, and the bottom of the shell and the lower flange are respectively screwed to each other through studs and nuts. A metal upper sealing ring is provided between the top of the oil pipe hanger and the upper flange, and the upper sealing ring is clamped between the upper flange and the oil pipe hanger. The device can maintain a good sealing effect regardless of whether the oil is placed in a high temperature or low temperature environment.

[0004] However, although the sealing between the tubing head body and the lower flange is improved in the above technical solution, a relatively large pressure will be generated inside the tubing head body when it is used. Since the tubing head body lacks an inner lining structure, the buffering effect on the internal pressure and impact force of the tubing is lost, which may cause the sealing device between the tubing head body and the lower flange to shift, thereby reducing the sealing performance. Moreover, when the internal pressure of the tubing head body is too high, the inner wall of the tubing head body may also be damaged. For this reason, we provide a tubing head with an inner lining reinforcement mechanism. Summary of the invention

[0005] The object of the present invention is to provide a tubing head with a liner reinforcement mechanism to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tubing head with a lining reinforcement mechanism, the tubing head with the lining reinforcement mechanism comprising: a tubing head body, a tubing hanger is arranged at one end of the tubing head body, a manual flat valve is arranged on the side of the tubing head body, a pressure gauge is arranged at one end of the manual flat valve, a first groove is arranged at the bottom of the tubing head body, a triangular groove is arranged at the side of the first groove, an arc groove is arranged at the side of the triangular groove, and a sealing block is arranged at the bottom of the tubing head body;

[0007] The lower flange has a sealing groove on its surface, a threaded groove on its side, and a triangular block on its surface;

[0008] An inner lining plate, a placement groove is provided on the outer side of the inner lining plate, a second groove is provided at the bottom of the placement groove, a through hole is provided on the side of the second groove, a connecting rod is provided on the side of the second groove, an extrusion plate is sleeved on the surface of the connecting rod, a protective pad is provided in the placement groove, a rigid spring is provided at the bottom of the protective pad, a fixing plate is provided on the side of the inner lining plate, threaded holes are provided on the fixing plate and the surface of the inner lining plate, a screw is threaded in the threaded hole, a bearing is sleeved on the surface of the screw, a bottom plate is sleeved on the surface of the bearing, and a vertical plate is provided on the side of the bottom plate.

[0009] Preferably, the tubing head body is connected to the lower flange by bolts, and multiple groups of bolts are provided, and the multiple groups of bolts are regularly arranged in a circle about the center point of the surface of the lower flange.

[0010] Preferably, the sealing groove is an annular plate structure, a rubber pad is arranged in the sealing groove, and the sealing block can be inserted into the sealing groove to squeeze the rubber pad.

[0011] Preferably, the triangular block is inserted into the triangular slot when the tubing head body is connected to the lower flange, a sealing strip is arranged in the arc groove opened on the side of the triangular slot, and there are two groups of arc grooves, which are linearly arranged about the side of the triangular slot.

[0012] Preferably, a second sealing gasket is arranged in the first groove, the second sealing gasket is glued in the first groove, and the second sealing gasket is an annular plate structure.

[0013] Preferably, the inner surface of the lining plate is a stainless steel lining layer, reinforcing ribs are arranged inside the lining plate, the outer ring surface of the lining plate is a stainless steel surface layer, and threads are provided on the outer ring surface of the lining plate.

[0014] Preferably, the surface of the protective pad is a PU polyurethane rubber surface layer, the inner interlayer of the protective pad is a polytetrafluoroethylene interlayer, and the protective pad is fixedly connected to the end of the placement groove.

[0015] Preferably, one end of the rigid spring is fixedly connected to the bottom of the protective pad, and the other end of the rigid spring is provided with a support seat, the bottom of the support seat is in contact with the surface of the extrusion plate, and the extrusion plate can rotate around the connecting rod.

[0016] Preferably, the inner ring surface of the bearing is fixedly connected to the surface of the screw, the inner ring surface of the base plate is fixedly connected to the surface of the bearing, the screw is threaded in the threaded hole, and a vertical plate is provided on the side of the base plate and inserted into the through hole.

[0017] Preferably, the inner side surface of the tubing head body is provided with a second thread, the inner lining plate can be rotated with the aid of the fixing plate, and then is screwed into the tubing head body using the thread provided on the outer annular surface of the inner lining plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the tubing head with the inner lining reinforcement mechanism proposed by the present invention is first connected to the tubing head body and the lower flange by bolts when in use, and then the inner lining plate is screwed to the inside of the tubing head body by means of the setting of the screw rod, and then the screw rod is rotated to make the vertical plate push the extrusion plate, and then the extrusion plate can be rotated upward by means of the inclined setting of one end of the extrusion plate, and the rigid spring is used to squeeze the protective pad set at one end by means of the upward rotation of the extrusion plate, and the protective pad after extrusion is used to increase the sealing of the gap between the tubing head body and the lower flange. Sealing protection, and then the inner lining plate can be used to support the tubing head body to improve the strength of the inner lining of the tubing head body, which is beneficial to improving the tubing head body's tolerance to higher pressures. This avoids the high pressure generated inside the traditional tubing head body when it is used. Because the tubing head body lacks an inner lining structure, it loses the buffering effect on the internal pressure and impact force of the tubing, which may cause the sealing device between the tubing head body and the lower flange to shift, thereby reducing the sealing performance. Moreover, when the internal pressure of the tubing head body is too high, the inner wall of the tubing head body may also be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a cross-sectional view of the tubing head body and the lower flange of the structure of the present invention;

[0021] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0022] Figure 4 for Figure 2 The enlarged structural diagram at B in the middle;

[0023] Figure 5 It is a cross-sectional view of the structural protection pad of the present invention;

[0024] Figure 6 This is a cross-sectional view of the inner lining plate of the structure of the present invention;

[0025] Figure 7 It is a schematic diagram of the structural lining plate of the present invention.

[0026] In the figure: 1, tubing head body; 2, tubing hanger; 3, manual flat valve; 4, pressure gauge; 101, first groove; 102, triangular slot; 103, arc slot; 104, sealing block; 200, lower flange; 201, sealing groove; 202, threaded groove; 203, triangular block; 300, lining plate; 301, placement groove; 302, second groove; 303, through hole; 304, connecting rod; 305, extrusion plate; 306, protective pad; 307 , rigid spring; 308, fixing plate; 309, threaded hole; 310, screw; 311, bearing; 312, bottom plate; 313, vertical plate; 211, rubber pad; 113, sealing strip; 111, second sealing pad; 331, stainless steel lining layer; 332, reinforcing rib; 333, stainless steel surface layer; 334, thread; 361, PU polyurethane rubber surface layer; 362, polytetrafluoroethylene interlayer; 317, support seat; 313, vertical plate; 5, bolt. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the technical solutions in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example 1

[0029] See also Figures 1 to 7The present invention provides a technical solution: a tubing head with a lining reinforcement mechanism, the tubing head with the lining reinforcement mechanism comprising: a tubing head body 1, a tubing hanger 2 is arranged at one end of the tubing head body 1, a manual flat valve 3 is arranged on the side of the tubing head body 1, a pressure gauge 4 is arranged at one end of the manual flat valve 3, a first groove 101 is opened at the bottom of the tubing head body 1, a triangular groove 102 is opened on the side of the first groove 101, an arc groove 103 is opened on the side of the triangular groove 102, a sealing block 104 is arranged at the bottom of the tubing head body 1; a lower flange 200, a sealing groove 201 is arranged on the surface of the lower flange 200, a threaded groove 202 is opened on the side of the lower flange 200, and a triangular block 203 is arranged on the surface of the lower flange 200; The inner lining plate 300 has a placement groove 301 formed on the outer side of the inner lining plate 300, a second groove 302 formed at the bottom of the placement groove 301, a through hole 303 formed on the side of the second groove 302, a connecting rod 304 formed on the side of the second groove 302, an extrusion plate 305 sleeved on the surface of the connecting rod 304, a protective pad 306 formed in the placement groove 301, a rigid spring 307 formed at the bottom of the protective pad 306, a fixing plate 308 formed on the side of the inner lining plate 300, a threaded hole 309 formed on the fixing plate 308 and the surface of the inner lining plate 300, a screw 310 threadedly connected in the threaded hole 309, a bearing 311 sleeved on the surface of the screw 310, a bottom plate 312 sleeved on the surface of the bearing 311, and a vertical plate 313 formed on the side of the bottom plate 312;

[0030] When in use, first connect the tubing head body 1 and the lower flange 200 with the bolts 5, then screw the lining plate 300 into the tubing head body 1 with the help of the screw rod 310, then rotate the screw rod 310 to make the vertical plate 313 push the extrusion plate 305, so that one end of the extrusion plate 305 rotates upward, and the upward rotation of the extrusion plate 305 makes the rigid spring 307 squeeze the protective pad 306, and the extruded protective pad 306 is used to increase the sealing protection of the connection gap between the tubing head body 1 and the lower flange 200, and then the inner lining plate 300 can be used to support the tubing head body 1, and the strength of the inner lining of the tubing head body 1 is improved, which is beneficial to improving the tolerance of the tubing head body 1 to higher pressure.

[0031] Embodiment 2

[0032] On the basis of the first embodiment, a sealing groove 201 is provided, and the sealing groove 201 is an annular plate structure. A rubber pad 211 is provided in the sealing groove 201. The sealing block 104 can be inserted into the sealing groove 201 to squeeze the rubber pad 211. The tubing head body 1 and the lower flange 200 are connected by bolts 5. There are multiple groups of bolts 5. The multiple groups of bolts 5 are regularly arranged in a circle about the center point of the surface of the lower flange 200. The triangular block 203 is inserted into the triangular groove 102 when the tubing head body 1 is connected to the lower flange 200. A sealing strip 113 is provided in the arc groove 103 opened on the side of the triangular groove 102. There are two groups of arc grooves 103. The two groups of arc grooves 103 are linearly arranged about the side of the triangular groove 102. A second sealing pad 111 is provided in the first groove 101. The second sealing pad 111 is glued in the first groove 101. The second sealing pad 111 is an annular plate structure.

[0033] When the tubing head body 1 needs to be installed on the lower flange 200 during use, the triangular block 203 is first inserted into the triangular groove 102 so that the triangular block 203 squeezes the sealing strip 113. The sealing block 104 squeezes the rubber gasket 211 in the sealing groove 201 and the second sealing gasket 111 cooperates with the lower flange 200. Then, the bolts 5 are used to connect the tubing head body 1 and the lower flange 200, which can greatly improve the sealing performance and prevent leakage.

[0034] Embodiment 3

[0035] On the basis of the second embodiment, an inner lining plate 300 is provided, the inner surface of the inner lining plate 300 is a stainless steel inner lining layer 331, a reinforcing rib 332 is provided inside the inner lining plate 300, the outer ring surface of the inner lining plate 300 is a stainless steel surface layer 333, a thread 334 is provided on the outer ring surface of the inner lining plate 300, the surface of the protective pad 306 is a PU polyurethane rubber surface layer 361, the inner interlayer of the protective pad 306 is a polytetrafluoroethylene interlayer 362, the protective pad 306 is fixedly connected to the end of the placement groove 301, one end of the rigid spring 307 is fixedly connected to the bottom of the protective pad 306, and the other end of the rigid spring 307 is provided with a support Support seat 317, the bottom of support seat 317 contacts with the surface of extrusion plate 305, extrusion plate 305 can rotate around connecting rod 304, the inner ring surface of bearing 311 is fixedly connected to the surface of screw rod 310, the inner ring surface of bottom plate 312 is fixedly connected to the surface of bearing 311, screw rod 310 is screwed into threaded hole 309, a vertical plate 313 is arranged on the side of bottom plate 312 and inserted into through hole 303, a second thread is provided on the inner side of tubing head body 1, inner lining plate 300 can rotate with the help of fixing plate 308, and then is screwed into tubing head body 1 by thread 334 provided on the outer ring surface of inner lining plate 300;

[0036] When in use, firstly, the inner lining plate 300 is screwed to the inside of the tubing head body 1 by means of the fixing plate 308 using the thread 334, and then the screw rod 310 is rotated to make the screw rod 310 rotate in the threaded hole 309, and the vertical plate 313 set on the side of the bottom plate 312 moves inward in the through hole 303 by the rotation of the screw rod 310, and then the vertical plate 313 pushes the extrusion plate 305 to make the extrusion plate 305 move upward on the support seat 317, so that the rigid spring 307 can be squeezed, so that the protective pad 306 is squeezed to seal the gap at the connection between the tubing head body 1 and the lower flange 200, and the internal material of the protective pad 306 is PU polyurethane rubber surface layer 3 61 and the polytetrafluoroethylene interlayer 362 can improve the reliability of the gap sealing at the connection between the tubing head body 1 and the lower flange 200 by utilizing their sealing, corrosion resistance and impact resistance, and also prevent the flow and impact of the liquid inside the tubing head body 1 from damaging the sealing device arranged between the tubing head body 1 and the lower flange 200 and affecting the service life. The inner lining plate 300 is provided with a stainless steel lining layer 331, a reinforcing rib 332, and a stainless steel surface layer 333 to increase the overall performance of the inner lining plate 300, improve the tolerance to the internal pressure of the tubing head body 1, and reduce the problem of damage to the inner wall of the tubing head body 1 caused by the internal impact of the tubing head body 1 and the high pressure.

[0037] In actual use, firstly, the tubing head body 1 and the lower flange 200 are connected by bolts 5, and then the lining plate 300 is screwed into the tubing head body 1 by means of the setting of the screw rod 310, and then the screw rod 310 is rotated to make the vertical plate 313 push the extrusion plate 305, and then the extrusion plate 305 can be rotated upward by means of the inclined setting of one end of the extrusion plate 305, and the upward rotation of the extrusion plate 305 is used to squeeze the protective pad 306 set at one end, and the protective pad 306 after squeezing is used to increase the sealing protection of the gap between the tubing head body 1 and the lower flange 200, and then the inner lining plate 300 can be used to support the tubing head body 1, and the strength of the inner lining of the tubing head body 1 is improved, which is conducive to improving the tolerance of the tubing head body 1 to higher pressure, and the triangle block 203 is inserted into the The triangular block 203 is inserted into the triangular groove 102 to squeeze the sealing strip 113. The sealing block 104 squeezes the rubber gasket 211 in the sealing groove 201 and the second sealing gasket 111 cooperates with the lower flange 200. Then, the bolts 5 are used to connect the tubing head body 1 and the lower flange 200, which can greatly improve the sealing performance and prevent leakage. This avoids the problem that a large pressure is generated inside the traditional tubing head body 1 when it is used. Because the tubing head body 1 lacks an inner lining structure, it loses the buffering effect on the internal pressure and impact force of the oil pipe, which may cause the sealing device between the tubing head body 1 and the lower flange 200 to deviate, thereby reducing the sealing performance. Moreover, when the internal pressure of the tubing head body 1 is too high, the inner wall of the tubing head body 1 may also be damaged.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tubing head with a lining reinforcement mechanism, characterized in that: The tubing head with a lining reinforcement mechanism comprises: a tubing head body (1), a tubing hanger (2) being arranged at one end of the tubing head body (1), a manual flat valve (3) being arranged on the side of the tubing head body (1), a pressure gauge (4) being arranged at one end of the manual flat valve (3), a first groove (101) being provided at the bottom of the tubing head body (1), a triangular groove (102) being provided on the side of the first groove (101), an arc groove (103) being provided on the side of the triangular groove (102), and a sealing block (104) being provided at the bottom of the tubing head body (1); A lower flange (200), a sealing groove (201) is provided on the surface of the lower flange (200), a threaded groove (202) is provided on the side surface of the lower flange (200), and a triangular block (203) is provided on the surface of the lower flange (200); An inner lining plate (300), wherein a placement groove (301) is provided on the outer side surface of the inner lining plate (300), a second groove (302) is provided at the bottom of the placement groove (301), a through hole (303) is provided on the side surface of the second groove (302), a connecting rod (304) is provided on the side surface of the second groove (302), an extrusion plate (305) is sleeved on the surface of the connecting rod (304), a protective pad (306) is provided in the placement groove (301), a rigid spring (307) is provided at the bottom of the protective pad (306), a fixing plate (308) is provided on the side surface of the inner lining plate (300), and a threaded hole (303) is provided on the fixing plate (308) and the surface of the inner lining plate (300). 9), a screw rod (310) is threadedly connected in the threaded hole (309), a bearing (311) is sleeved on the surface of the screw rod (310), a bottom plate (312) is sleeved on the surface of the bearing (311), and a vertical plate (313) is arranged on the side of the bottom plate (312). The screw rod (310) is rotated to make the vertical plate (313) push the extrusion plate (305), so that one end of the extrusion plate (305) rotates upward, and the rigid spring (307) is squeezed by the upward rotation of the extrusion plate (305) to squeeze the protective pad (306), and the extruded protective pad (306) is used to increase the sealing protection of the connection gap between the tubing head body (1) and the lower flange (200); One end of the rigid spring (307) is fixedly connected to the bottom of the protective pad (306), and the other end of the rigid spring (307) is provided with a support seat (317). The bottom of the support seat (317) contacts the surface of the extrusion plate (305), and the extrusion plate (305) can rotate around the connecting rod (304).

2. The tubing head with a lining reinforcement mechanism according to claim 1, characterized in that: The tubing head body (1) and the lower flange (200) are connected by bolts (5), and a plurality of groups of bolts (5) are provided. The plurality of groups of bolts (5) are regularly arranged in a circle about a center point of a surface of the lower flange (200).

3. The tubing head with a lining reinforcement mechanism according to claim 2, characterized in that: The sealing groove (201) is an annular plate-shaped structure, a rubber pad (211) is arranged in the sealing groove (201), and the sealing block (104) can be inserted into the sealing groove (201) to squeeze the rubber pad (211).

4. The tubing head with a lining reinforcement mechanism according to claim 3, characterized in that: The triangular block (203) is inserted into the triangular groove (102) when the tubing head body (1) is connected to the lower flange (200). A sealing strip (113) is provided in the arc groove (103) opened on the side of the triangular groove (102). Two groups of arc grooves (103) are provided. The two groups of arc grooves (103) are linearly arranged with respect to the side of the triangular groove (102).

5. The tubing head with a lining reinforcement mechanism according to claim 4, characterized in that: A second sealing gasket (111) is arranged in the first groove (101); the second sealing gasket (111) is glued in the first groove (101); the second sealing gasket (111) is in the form of an annular plate.

6. The tubing head with a lining reinforcement mechanism according to claim 5, characterized in that: The inner surface of the inner lining plate (300) is a stainless steel inner lining layer (331), a reinforcing rib (332) is arranged inside the inner lining plate (300), the outer ring surface of the inner lining plate (300) is a stainless steel surface layer (333), and a thread (334) is provided on the outer ring surface of the inner lining plate (300).

7. The tubing head with a lining reinforcement mechanism according to claim 6, characterized in that: The surface of the protective pad (306) is a PU polyurethane rubber surface layer (361), the inner interlayer of the protective pad (306) is a polytetrafluoroethylene interlayer (362), and the protective pad (306) is fixedly connected to the end of the placement groove (301).

8. The tubing head with a liner reinforcement mechanism according to claim 1, characterized in that: The inner ring surface of the bearing (311) is fixedly connected to the surface of the screw rod (310), the inner ring surface of the bottom plate (312) is fixedly connected to the surface of the bearing (311), the screw rod (310) is threaded into the threaded hole (309), and a vertical plate (313) is provided on the side of the bottom plate (312) and inserted into the through hole (303).

9. The tubing head with a liner reinforcement mechanism according to claim 8, characterized in that: The inner side surface of the tubing head body (1) is provided with a second thread, and the inner lining plate (300) can be rotated with the aid of the fixing plate (308), and then screwed into the tubing head body (1) using the thread (334) provided on the outer annular surface of the inner lining plate (300).

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