A large-diameter, high-pressure oil and gas production wellhead device

Abstract

The present invention relates to the technical field of oil and gas wellhead devices, and specifically to a large-diameter, high-pressure oil and gas wellhead device, comprising a base provided on the surface of an oil production tree, a support provided on the surface of the base, a limit cylinder and a slider provided on the surface of the support, and a carrier provided on the surface of the limit cylinder, a second limit cylinder and a threaded cylinder provided on the upper surface of a carrier plate, a stud provided in the threaded cylinder, and a limit rod and a pillar provided on the lower surface of the carrier plate, a positioning block provided on the surface of the pillar, a fixed support plate and an adjustable support plate provided on the surface of the carrier, and a limit groove and a through hole provided on the surface of the carrier; the beneficial effect is: the two ends of the oil production tree valve are supported by the fixed support plate and the adjustable support plate, which effectively reduces the weight of the bolts on one end of the valve close to the oil production tree, thereby improving the tightness of the bolts for fixing the valve, so as to achieve improved use effect of the oil production tree.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas production wellhead devices, in particular to a large-diameter, high-pressure oil and gas production wellhead device. Background Art

[0002] Oil and gas extraction is the process of extracting oil and natural gas buried in underground oil layers.

[0003] In the existing technology, oil and gas production requires drilling oil and gas wells in the formation according to a certain well layout system, and installing a large-diameter high-pressure oil production tree at the wellhead as the main equipment for controlling and regulating oil and gas production. The tree consists of valves, reducers, nozzles and pipeline accessories.

[0004] However, because the valves installed on the Christmas tree at the oil and gas wellhead are numerous and high, the end of the valve away from the Christmas tree is affected by gravity, which will cause the bolts on the end of the valve close to the Christmas tree to be subjected to greater force, thereby affecting the tightness and stability of the bolts fixing the valves, and having a negative impact on the operation of the Christmas tree. Summary of the Invention

[0005] The present invention aims to provide a large-diameter, high-pressure oil and gas production wellhead assembly to address the problem, as mentioned in the background art, that the valves installed on the Christmas tree at the wellhead are numerous and high in height. Consequently, the valves at the end away from the Christmas tree are affected by gravity, which results in greater stress on the bolts at the end of the valves near the tree. This affects the tightness and stability of the bolts securing the valves, adversely affecting the operation of the Christmas tree.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a large-diameter high-pressure oil and gas production wellhead device, the large-diameter high-pressure oil and gas production wellhead device comprising:

[0007] The Christmas tree; a base is provided on the surface of the Christmas tree, a support is provided on the surface of the base, a limit cylinder and a slider are provided on the surface of the support, and a carrier is provided on the surface of the limit cylinder;

[0008] The upper surface of the carrier plate is provided with a second limiting cylinder and a threaded cylinder, the threaded cylinder is provided with a stud, and the lower surface of the carrier plate is provided with a limiting rod and a pillar, and the surface of the pillar is provided with a positioning block; and

[0009] The surface of the carrier is provided with a fixed support plate and an adjustment support plate, and the surface of the carrier is provided with a limiting groove and a through hole.

[0010] Preferably, a plurality of valves are connected to the top of the Christmas tree, a base is fixed on the outer surface of the base of the Christmas tree, and the base is arranged directly below the valve, a plurality of fixing holes are opened on the side of the surface of the base, the plurality of fixing holes are evenly distributed, and bolts are arranged in the fixing holes.

[0011] Preferably, the surface of the base is provided with two groups of slide grooves, which are symmetrically distributed on both sides of the upper surface of the base, and the slide grooves are trapezoidal. Two groups of sliders are provided, which are symmetrically fixed on both sides of the bottom surface of the support, and the sliders are trapezoidal, and the sliders and the slide grooves correspond to each other. The sliders are arranged in the slide grooves, and the surface of the support is provided with multiple screw holes, which correspond to the fixing holes, and the inner ends of the bolts are screwed into the screw holes.

[0012] Preferably, there are multiple limiting cylinders, and the multiple limiting cylinders are respectively fixed at the four corners of the surface of the support. The carrier is fixed between the multiple limiting cylinders, and the top surface of the carrier is provided with an adjustment groove, and multiple annular grooves are provided. The multiple annular grooves are evenly distributed on the surface of the adjustment groove, and positioning grooves are symmetrically provided on both sides of the surface of the annular groove. Through grooves are symmetrically provided on both sides of the top surface of the carrier, and the through grooves penetrate and connect the multiple annular grooves, and the through grooves and the positioning grooves have the same width.

[0013] Preferably, the second limiting cylinder is provided with two groups, and the two groups of second limiting cylinders are symmetrically fixed on both sides of the upper surface of the carrier plate, the threaded cylinder is fixed in the middle of the upper surface of the carrier plate, the upper end of the stud is arranged above the threaded cylinder, and a turntable is fixed on the surface of the stud, the turntable is arranged above the threaded cylinder, and a top support plate is fixed on the top surface of the stud.

[0014] Preferably, there are multiple limit rods, which are respectively fixed at the four corners of the lower surface of the carrier plate, the top surface of the pillar is supported in the middle of the lower surface of the carrier plate, and a limit ring plate is fixed in the middle of the bottom surface of the carrier plate, the top of the pillar is arranged in the limit ring plate, and two groups of positioning blocks are provided, and the two groups of positioning blocks are symmetrically fixed on both sides of the bottom surface of the pillar.

[0015] Preferably, the carrier plate is arranged above the limiting cylinder, the limiting rod corresponds to the limiting cylinder, the lower part of the limiting rod is arranged in the limiting cylinder, the pillar corresponds to the adjustment slot, the lower part of the pillar is arranged in the adjustment slot, the positioning block is adapted to the positioning slot, and the positioning block is clamped in the positioning slot.

[0016] Preferably, the top surface of the fixed support plate is arc-shaped, and the fixed support plate is fixed on one side of the top surface of the carrier, the end surface of the adjustment support plate is arc-shaped, and the adjustment support plate is arranged on the other side of the top surface of the carrier, and the end surfaces of the adjustment support plate and the fixed support plate are flush.

[0017] Preferably, the limiting groove is T-shaped, and the limiting groove passes through one side wall surface of the carrier. A plurality of through holes are provided, and the plurality of through holes are evenly distributed on both sides of the top surface of the carrier, and the through holes are communicated with the limiting grooves, and bolts are provided in the through holes. The bottom end of the adjusting support plate is T-shaped, and the bottom end of the adjusting support plate is provided in the limiting groove, and second screw holes are provided on both sides of the bottom end surface of the adjusting support plate, and the second screw holes correspond to the through holes, and the bottom end of the bolts is provided in the through holes.

[0018] Preferably, the carrier is arranged above the carrier plate, and second limiting rods are fixed at the corners of the lower surface of the carrier, the second limiting rods correspond to the second limiting cylinder, the lower part of the second limiting rod is arranged in the second limiting cylinder, the top supporting plate is supported on the bottom surface of the carrier, and the fixed supporting plate and the adjustable supporting plate are both supported on the bottom surface of the outer end of the valve connected above the oil production tree.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention proposes a large-diameter, high-pressure oil and gas production wellhead device;

[0021] 1. The fixed and adjustable support plates support both ends of the Christmas tree valve, effectively reducing the weight on the bolts at the valve end close to the tree, thereby improving the tightness of the bolts fixing the valve and improving the use of the Christmas tree.

[0022] 2. The distance between the two support plates is adjusted and fixed by pushing the adjustment support plate to move its bottom end in the limit groove. The adjustment support plate is locked by screwing the bolt into the second screw hole. The adjustment of the adjustment support plate allows it to effectively support valves of different sizes, thereby improving its use effect.

[0023] 3. Move the support upward to a suitable height and then rotate it so that the positioning block rotates in the annular groove to the positioning groove. Loosen the support so that the positioning block is locked in the positioning groove to position the support. When the support holds the carrier plate to move, the limit rod moves in the limit cylinder to ensure the stability of the carrier plate, and the top of the support is limited by the limit ring plate, effectively preventing the support from tilting when supporting the carrier plate. The length of the stud is adjusted by rotating the turntable. The stud holds the carrier seat for height adjustment. When the carrier seat moves, the second limit rod moves in the second limit cylinder to ensure the stability of the carrier seat, so that the fixed support plate and the adjustable support plate support the valve. First, a large height adjustment is made through the support, and then the height of the carrier seat is fine-tuned through the stud. The operation process is relatively simple, and valves of different height specifications of the oil tree can be supported and used, thereby improving its use effect.

[0024] 4. The use position of the support is adjusted by pushing it to move on the base. When the support moves, the slider moves in the slide groove to ensure its stability. After the support moves to the appropriate position, the support is fixed by screwing the bolts into the screw holes. The adjustment of the support enables the carrier to effectively support the oil production tree valves of different lengths, thereby improving its use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0026] Figure 2This is a schematic diagram of the support assembly of the present invention;

[0027] Figure 3 This is a bottom view schematic diagram of the support assembly of the present invention;

[0028] Figure 4 This is a schematic diagram of the support structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the pillar structure of the present invention;

[0030] Figure 6 Schematic diagram of the carrier structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the jacking structure of the present invention;

[0032] Figure 8 This is a schematic diagram of the support plate structure adjustment of the present invention.

[0033] In the figure: 1 Christmas tree, 2 carrier plate, 3 limiting rod, 4 limiting cylinder, 5 base, 6 fixing hole, 7 support, 8 slide, 9 carrier, 10 second limiting cylinder, 11 second limiting rod, 12 slider, 13 screw hole, 14 carrier, 15 fixed support plate, 16 threaded cylinder, 17 limiting groove, 18 through hole, 19 adjustment support plate, 20 stud, 21 pillar, 22 turntable, 23 top support plate, 24 limiting ring plate, 25 adjustment groove, 26 annular groove,

[0034] 27 through-slot, 28 positioning slot, 29 positioning block, 30 second screw hole. DETAILED DESCRIPTION

[0035] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Example 1

[0037] See also Figures 1-8 , the present invention provides a technical solution: a large-diameter high-pressure oil and gas production wellhead device;

[0038] To improve the performance of the valve on Christmas tree 1, a fixed support plate 15 and an adjustable support plate 19 are provided below the valve. These support plates 15 and 19 support both ends of the valve, effectively reducing the weight on the bolts at the valve end closest to the tree, thereby increasing the tightness of the bolts securing the valve and improving the performance of Christmas tree 1.

[0039] Example 2

[0040] On the basis of embodiment 1, in order to improve the use effect of the fixed support plate 15 and the adjustment support plate 19, the top surface of the fixed support plate 15 is arc-shaped, and the fixed support plate 15 is fixed to one side of the top surface of the carrier 14, the end surface of the adjustment support plate 19 is arc-shaped, and the adjustment support plate 19 is provided on the other side of the top surface of the carrier 14, and the end surfaces of the adjustment support plate 19 and the fixed support plate 15 are flush with each other, the limiting groove 17 is T-shaped, and the limiting groove 17 passes through one side wall surface of the carrier 14, and a plurality of through holes 18 are provided, and the plurality of through holes 18 are evenly distributed on both sides of the top surface of the carrier 14, and the through holes 18 are communicated with the limiting groove 17. A bolt is provided in the through hole 18, the bottom end of the adjusting support plate 19 is in a 'T' shape, and the bottom end of the adjusting support plate 19 is provided in the limiting groove 17, and second screw holes 30 are provided on both sides of the bottom surface of the adjusting support plate 19, the second screw holes 30 correspond to the through hole 18, and the bottom end of the bolt is provided in the through hole 18. By pushing the adjusting support plate 19 to move its bottom end in the limiting groove 17, the distance between the two support plates 15 can be adjusted and fixed, and the adjusting support plate 19 is locked by screwing the bolt into the second screw hole 30. The adjustment of the adjusting support plate 19 enables it to effectively support valves of different sizes, so as to improve its use effect.

[0041] Example 3

[0042] On the basis of the second embodiment, in order to further improve the use effect of the fixed support plate 15 and the adjustable support plate 19, a second limiting rod 11 is fixed at the corners of the lower surface of the carrier 14, the carrier 14 is arranged above the carrier 2, the upper surface of the carrier 2 is provided with a second limiting cylinder 10 and a threaded cylinder 16, a stud 20 is provided in the threaded cylinder 16, and a limiting rod 3 and a pillar 21 are provided on the lower surface of the carrier 2, a positioning block 29 is provided on the surface of the pillar 21, and a turntable 22 is fixed on the surface of the stud 20, and the turntable 2 2 is arranged above the threaded cylinder 16, and a top supporting plate 23 is fixed to the top surface of the stud 20, the carrier plate 2 is arranged above the limiting cylinder 4, the surface of the limiting cylinder 4 is provided with a carrier 9, and the top surface of the carrier 9 is provided with an adjustment groove 25, a plurality of annular grooves 26 are provided, and the plurality of annular grooves 26 are evenly distributed on the surface of the adjustment groove 25, and positioning grooves 28 are symmetrically provided on both sides of the surface of the annular groove 26, and through grooves 27 are symmetrically provided on both sides of the top surface of the carrier 9, and the through grooves 27 penetrate and connect the plurality of annular grooves 26, and

[0043] The through groove 27 and the positioning groove 28 have the same width. The top surface of the pillar 21 is held in the middle of the lower surface of the carrier plate 2, and the middle of the bottom surface of the carrier plate 2 is fixed with a limiting ring plate 24. The top of the pillar 21 is arranged in the limiting ring plate 24, the limiting rod 3 corresponds to the limiting cylinder 4, and the lower part of the limiting rod 3 is arranged in the limiting cylinder 4. The pillar 21 corresponds to the adjustment groove 25, and the lower part of the pillar 21 is arranged in the adjustment groove 25. The positioning block 29 is adapted to the positioning groove 28, and the positioning block 29 is clamped in the positioning groove 28. By moving the pillar 21 upward to a suitable height and then rotating it, the positioning block 29 is rotated in the annular groove 26 to the positioning groove 28.

[0044] The support 21 is loosened so that the positioning block 29 is locked into the positioning groove 28 to position the support 21. When the support 21 supports the carrier plate 2 and moves, the limit rod 3 moves in the limit cylinder 4 to ensure the stability of the carrier plate 2, and the top of the support 21 is limited by the limit ring plate 24, effectively preventing the support 21 from tilting when supporting the carrier plate 2. By rotating the turntable 22, the length of the stud 20 is adjusted, and the stud 20 supports the carrier 14 for height adjustment. When the carrier 14 is displaced, the second limit rod 11 moves in the second limit cylinder 10 to ensure the stability of the carrier 14, so that the fixed support plate 15 and the adjusting support plate 19 support the valve. The height is first adjusted significantly by the support 21, and then the height of the carrier 14 is fine-tuned by the stud 20. The operation process is relatively simple, and valves of different height specifications of the oil tree 1 can be supported and used to improve its use effect.

[0045] Example 4

[0046] On the basis of the second embodiment, in order to further improve the use effect of the fixed support plate 15 and the adjustable support plate 19, a base 5 is provided on the surface of the oil tree 1, a support 7 is provided on the surface of the base 5, a plurality of limit cylinders 4 are provided, and the plurality of limit cylinders 4 are respectively fixed at the four corners of the surface of the support 7, and two groups of slide grooves 8 are opened on the surface of the base 5. The two groups of slide grooves 8 are symmetrically distributed on both sides of the upper surface of the base 5, and the slide grooves 8 are trapezoidal. There are two groups of sliders 12, and the two groups of sliders 12 are symmetrically fixed on both sides of the bottom end surface of the support 7. The sliders 12 are trapezoidal, and the sliders 12 and the slide grooves are arranged in a rectangular shape. 8 corresponds to the slider 12 is provided in the slide 8, a plurality of screw holes 13 are opened on the surface of the support 7, the screw holes 13 correspond to the fixing holes 6, the inner ends of the bolts are screwed in the screw holes 13, and the use position of the support 7 is adjusted by pushing it to move on the base 5. When the support 7 moves, the slider 12 moves in the slide 8 to ensure its stability. After the support 7 moves to the appropriate position, the bolts are screwed into the screw holes 13 to fix the support 7. The adjustment of the support 7 enables the carrier 14 to effectively support the valves of the oil production tree 1 of different lengths, so as to improve its use effect.

[0047] In actual use, the two ends of the valve of the Christmas tree 1 are supported by the fixed support plate 15 and the adjustable support plate 19, which effectively reduces the weight of the bolts at one end of the valve close to the Christmas tree 1, thereby improving the tightness of the bolts in fixing the valve, so as to improve the use effect of the Christmas tree 1; the distance between the two is adjusted and fixed by pushing the adjustable support plate 19 to move its bottom end in the limit groove 17, and the adjustable support plate 19 is locked by screwing the bolt into the second screw hole 30, so that the adjustment of the adjustable support plate 19 can be effectively adjusted. The support 21 is moved upward to a suitable height and then rotated, so that the positioning block 29 is rotated in the annular groove 26 to the positioning groove 28, and the support 21 is loosened so that the positioning block 29 is clamped in the positioning groove 28 to position the support 21. When the support 21 moves while holding the carrier plate 2, the limiting rod 3 moves in the limiting cylinder 4 to ensure the stability of the carrier plate 2, and the top of the support 21 is limited by the limiting ring plate 24. The support plate 21 is positioned to effectively prevent the support plate 2 from tilting when supporting the carrier plate 2. The length of the stud 20 is adjusted by rotating the turntable 22. The stud 20 supports the carrier 14 for height adjustment. When the carrier 14 moves, the second limiting rod 11 moves in the second limiting cylinder 10 to ensure the stability of the carrier 14, so that the fixed support plate 15 and the adjustable support plate 19 support the valve. First, a large-scale height adjustment is made through the support plate 21, and then the height of the carrier 14 is fine-tuned through the stud 20. The operation process is relatively simple. The support 7 is pushed to move on the base 5 to adjust its use position. When the support 7 moves, the slider 12 moves in the slide groove 8 to ensure its stability. After the support 7 moves to a suitable position, the bolt is screwed into the screw hole 13 to fix the support 7. The adjustment of the support 7 enables the carrier 14 to effectively support the valves of the Christmas tree 1 of different lengths, thereby improving its use effect.

[0048] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A large-diameter, high-pressure oil and gas production wellhead device, characterized by: The large-diameter high-pressure oil and gas production wellhead device comprises: A Christmas tree (1); a base (5) is provided on the surface of the Christmas tree (1); a support (7) is provided on the surface of the base (5); a limiting cylinder (4) and a slider (12) are provided on the surface of the support (7); and a carrier (9) is provided on the surface of the limiting cylinder (4); A carrier plate (2); a second limiting cylinder (10) and a threaded cylinder (16) are provided on the upper surface of the carrier plate (2), a stud (20) is provided in the threaded cylinder (16), and a limiting rod (3) and a support (21) are provided on the lower surface of the carrier plate (2), and a positioning block (29) is provided on the surface of the support (21); and The carrier (14) is provided with a fixed support plate (15) and an adjustment support plate (19) on the surface of the carrier (14), and a limiting groove (17) and a through hole (18) are provided on the surface of the carrier (14). The second limiting cylinder (10) is provided with two groups, and the two groups of second limiting cylinders (10) are symmetrically fixed on both sides of the upper surface of the carrier (2). The threaded cylinder (16) is fixed on the middle part of the upper surface of the carrier (2). The upper end of the stud (20) is provided above the threaded cylinder (16), and the surface of the stud (20) is fixed. There is a turntable (22), the turntable (22) is arranged above the threaded cylinder (16), and a top supporting plate (23) is fixed to the top surface of the stud (20), the carrier plate (2) is arranged above the limiting cylinder (4), the limiting rod (3) corresponds to the limiting cylinder (4), the lower part of the limiting rod (3) is arranged in the limiting cylinder (4), the support (21) corresponds to the adjustment groove (25), the lower part of the support (21) is arranged in the adjustment groove (25), the positioning block (29) is adapted to the positioning groove (28), and the positioning block ( 29) is clamped in the positioning groove (28), the top surface of the fixed support plate (15) is arc-shaped, and the fixed support plate (15) is fixed to one side of the top surface of the carrier (14), the end surface of the adjustment support plate (19) is arc-shaped, the adjustment support plate (19) is arranged on the other side of the top surface of the carrier (14), and the end surfaces of the adjustment support plate (19) and the fixed support plate (15) are flush with each other, the limiting groove (17) is T-shaped, the limiting groove (17) passes through the side wall surface of the carrier (14), and the through hole (18) is opened. A plurality of through holes (18) are evenly distributed on both sides of the top surface of the carrier (14), and the through holes (18) are connected to the limiting groove (17), and a bolt is provided in the through hole (18), the bottom end of the adjusting support plate (19) is T-shaped, and the bottom end of the adjusting support plate (19) is arranged in the limiting groove (17), and second screw holes (30) are opened on both sides of the bottom end surface of the adjusting support plate (19), the second screw hole (30) corresponds to the through hole (18), and the bottom end of the bolt is arranged in the through hole (18).

2. The large-diameter, high-pressure oil and gas production wellhead device according to claim 1, characterized in that: A plurality of valves are connected to the top of the Christmas tree (1), a base (5) is fixed on the outer surface of the base of the Christmas tree (1), and the base (5) is arranged directly below the valves. A plurality of fixing holes (6) are opened on the side of the surface of the base (5), and the plurality of fixing holes (6) are evenly distributed, and bolts are arranged in the fixing holes (6).

3. The large-diameter, high-pressure oil and gas production wellhead device according to claim 1, characterized in that: The surface of the base (5) is provided with two groups of slide grooves (8), which are symmetrically distributed on both sides of the upper surface of the base (5), and the slide grooves (8) are trapezoidal. Two groups of sliders (12) are provided, and the two groups of sliders (12) are symmetrically fixed on both sides of the bottom surface of the support (7). The sliders (12) are trapezoidal, and the sliders (12) and the slide grooves (8) correspond to each other. The sliders (12) are arranged in the slide grooves (8). The surface of the support (7) is provided with a plurality of screw holes (13), and the screw holes (13) correspond to the fixing holes (6). The inner ends of the bolts are screwed into the screw holes (13).

4. The large-diameter, high-pressure oil and gas production wellhead device according to claim 1, characterized in that: The limiting cylinders (4) are provided in plurality, and the plurality of limiting cylinders (4) are respectively fixed at the four corners of the surface of the support (7). The carrier (9) is fixed between the plurality of limiting cylinders (4), and the top surface of the carrier (9) is provided with an adjustment groove (25), and a plurality of annular grooves (26) are provided. The plurality of annular grooves (26) are evenly distributed on the surface of the adjustment groove (25), and positioning grooves (28) are symmetrically provided on both sides of the surface of the annular groove (26). The top surface of the carrier (9) is provided with through grooves (27) symmetrically on both sides, and the through grooves (27) penetrate and connect the plurality of annular grooves (26), and the through grooves (27) and the positioning grooves (28) have the same width.

5. The large-diameter, high-pressure oil and gas production wellhead device according to claim 1, characterized in that: The limiting rods (3) are provided in plurality, and the limiting rods (3) are respectively fixed at the four corners of the lower surface of the carrier plate (2). The top surface of the pillar (21) is supported on the middle of the lower surface of the carrier plate (2), and a limiting ring plate (24) is fixed on the middle of the bottom surface of the carrier plate (2). The top of the pillar (21) is arranged in the limiting ring plate (24). Two groups of positioning blocks (29) are provided, and the two groups of positioning blocks (29) are symmetrically fixed on both sides of the bottom surface of the pillar (21).

6. The large-diameter, high-pressure oil and gas production wellhead device according to claim 1, characterized in that: The carrier (14) is arranged above the carrier plate (2), and second limiting rods (11) are fixed at the corners of the lower surface of the carrier (14), the second limiting rod (11) corresponds to the second limiting cylinder (10), and the lower part of the second limiting rod (11) is arranged in the second limiting cylinder (10), the top supporting plate (23) is supported on the bottom surface of the carrier (14), and the fixed supporting plate (15) and the adjusting supporting plate (19) are both supported on the bottom surface of the outer end of the valve connected to the top of the oil production tree (1).

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