A fixed pin assembly and trolley fixed pin fastening structure

Abstract

The application discloses a fixed pin assembly, which comprises a fixed pin, at least two clamping parts are arranged at the first end of the side wall of the fixed pin, the clamping parts are fixedly arranged on the side wall of the fixed pin and extend away from the axis of the fixed pin, and the two clamping parts are arranged at intervals; and an end fastener is detachably connected with the second end of the fixed pin, and the outer diameter of the end fastener is larger than that of the fixed pin. The clamping parts arranged at the first end of the fixed pin can clamp the fixed pin assembly on a trolley, the fixed pin assembly is arranged in wellhead equipment, the horizontal displacement of the wellhead equipment can be limited by the fixed pin, and the end fastener can press the wellhead equipment on the upper surface of the trolley, so that the vertical locking and the horizontal locking of the wellhead equipment are simultaneously realized.

Description

Technical Field

[0001] This invention relates to the field of wellhead connection equipment technology, specifically a fixing pin assembly and a trolley fixing pin fastening structure. Background Technology

[0002] The trolley moves on the wellhead of the drilling vessel. The wellhead equipment used at the wellhead needs to be connected to the trolley. However, ordinary pins can only prevent the wellhead equipment from moving horizontally, but cannot lock the vertical movement. When the working conditions of the wellhead equipment change, it may cause the wellhead equipment to move vertically, which poses a safety hazard.

[0003] Therefore, there is an urgent need to provide a fixing pin assembly and a trolley fixing pin fastening structure that can simultaneously lock the wellhead equipment in both vertical and horizontal directions. Summary of the Invention

[0004] The purpose of this invention is to provide a fixing pin assembly to solve the problems existing in the prior art. By providing a snap-fit ​​part at the first end of the fixing pin and an end fastener at the second end of the fixing pin, the vertical and horizontal locking of the wellhead equipment can be achieved simultaneously.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a fixing pin assembly, comprising:

[0007] A fixing pin, wherein at least two snap-fit ​​portions are provided at the first end of the sidewall of the fixing pin, the snap-fit ​​portions are fixedly disposed on the sidewall of the fixing pin and extend in a direction away from the axis of the fixing pin, and the two snap-fit ​​portions are spaced apart.

[0008] An end fastener is provided, wherein the end fastener is detachably connected to the second end of the fixing pin, and the outer diameter of the end fastener is larger than the outer diameter of the fixing pin.

[0009] Preferably, the snap-fit ​​portion is evenly arranged circumferentially along the fixing pin.

[0010] Preferably, the outer side wall of the second end of the fixing pin is provided with an external thread, the end fastener is threadedly engaged with the fixing pin, and the end fastener has an internal thread hole that matches the second end of the fixing pin.

[0011] Preferably, the end fastener is a hammer nut, and the outer wall of the hammer nut is provided with a protruding block.

[0012] Preferably, it also includes a detachable fixing pin cap, the inner wall of which is provided with an internal thread that matches the external thread, the top of which is provided with a connecting rib, and the connecting rib is provided with a lifting hole.

[0013] Preferably, the portion of the outer wall of the second end with external threads constitutes a connecting segment, the diameter of the connecting segment is smaller than the diameter of the fixing pin, and the sidewall thickness of the fixing pin cap is not greater than the difference between the radius of the fixing pin and the radius of the connecting segment.

[0014] Preferably, the end of the snap-fit ​​portion away from the fixing pin is arc-shaped.

[0015] Preferably, it further includes an auxiliary locking protrusion, which is fixedly disposed on the side wall between the first end and the second end of the fixing pin. The auxiliary locking protrusion and the end fastener constitute an auxiliary locking mechanism, which can press the target part to be locked between the auxiliary locking protrusion and the end fastener.

[0016] Furthermore, the present invention also provides a trolley fixing pin fastening structure, including a trolley, wellhead equipment, and the aforementioned fixing pin assembly, wherein,

[0017] The trolley has a locking hole that is adapted to the shape of the first end of the fixing pin so as to allow the first end of the fixing pin with the locking part to pass through.

[0018] The wellhead equipment is stacked on the trolley, and the wellhead equipment has an installation through hole aligned with the clamping hole;

[0019] The first end of the fixing pin passes through the mounting hole and rotates to achieve a locking connection with the mounting hole. The second end of the fixing pin extends out of the mounting through hole. The end fastener is fixed to the second end of the fixing pin and presses the wellhead equipment onto the trolley.

[0020] Preferably, the bottom of the mounting hole has a mounting groove with a circular cross-section and a diameter larger than the maximum rotation diameter of the first end of the fixing pin; the top of the mounting hole has a countersunk hole I extending from the upper surface of the trolley to the mounting groove, and countersunk holes II adapted to the locking part are provided on both sides of the countersunk hole I to allow the locking part to enter the mounting groove. The diameter of the countersunk hole I is larger than the diameter of the fixing pin and smaller than the maximum rotation diameter of the first end of the fixing pin.

[0021] The present invention achieves the following technical effects compared to the prior art:

[0022] The fixing pin assembly provided by the present invention can be snapped onto the trolley by a snap-fit ​​part provided at the first end of the fixing pin. The fixing pin assembly is inserted into the wellhead equipment. The fixing pin can restrict the horizontal displacement of the wellhead equipment. An end fastener is provided at the second end of the fixing pin. The end fastener can press the wellhead equipment against the upper surface of the trolley, thereby restricting the vertical displacement of the wellhead equipment. This achieves simultaneous vertical and horizontal locking of the wellhead equipment. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the application of the fixing pin assembly in this invention;

[0025] Figure 2 This is a schematic diagram of the fixing pin assembly of the present invention;

[0026] Figure 3 This is a schematic diagram of tightening the nut in this invention;

[0027] Figure 4 This is a front view of one embodiment of the present invention;

[0028] Figure 5 for Figure 4 A side sectional view;

[0029] Figure 6 for Figure 4 Top view;

[0030] Figure 7 This is a schematic diagram of the trolley in this invention;

[0031] Among them, 1. fixing pin; 2. snap-fit ​​part; 3. end fastener; 4. protruding block; 5. fixing pin cap; 6. connecting rib; 7. lifting hole; 8. connecting section; 9. auxiliary locking protrusion; 10. trolley; 11. wellhead equipment; 12. installation through hole; 13. snap-fit ​​groove; 14. countersunk hole one; 15. countersunk hole two; 16. receiving groove. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] The purpose of this invention is to provide a fixing pin assembly to solve the problems existing in the prior art, thereby resolving the issue of vertical displacement in wellhead equipment in the prior art.

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1-7 As shown, the fixing pin assembly provided in this embodiment of the invention includes a fixing pin 1 and an end fastener 3. This fixing pin assembly can be used to fix the trolley 10 and the wellhead equipment 11. The first end of the sidewall of the fixing pin 1 is provided with at least two engaging portions 2. The engaging portions 2 are fixedly disposed on the sidewall of the fixing pin 1 and extend away from the axis of the fixing pin 1. The two engaging portions 2 are spaced apart. The fixing pin assembly can be engaged onto the trolley 10 through the engaging portions 2. The fixing pin 1 passes through the wellhead equipment 11 to be fastened, thereby restricting the horizontal movement of the wellhead equipment 11. The end fastener 3 is detachably connected to the second end of the fixing pin 1, and the outer diameter of the end fastener 3 is larger than the outer diameter of the fixing pin 1. After the end fastener 3 is installed on the second end of the fixing pin 1, the wellhead equipment 11 can be pressed tightly above the trolley 10, thereby restricting the vertical displacement of the wellhead equipment 11. This ensures that the tightened wellhead equipment 11 will not undergo horizontal or vertical displacement due to changes in working conditions, thus improving the safety of the wellhead equipment 11 during use.

[0036] Furthermore, the locking part 2 is evenly arranged around the fixing pin 1, ensuring that the fixing pin 1 is subjected to balanced force in all directions after locking.

[0037] Even better, the end of the snap-fit ​​part 2 away from the fixing pin 1 is arc-shaped.

[0038] As a preferred embodiment, the outer wall of the second end of the fixing pin 1 is provided with external threads, and the end fastener 3 is threadedly engaged with the fixing pin 1. The end fastener 3 has an internal threaded hole that matches the second end of the fixing pin 1. The threaded engagement provides strong stability. Connecting the end fastener 3 and the fixing pin 1 with a threaded engagement improves the stability of the fixing pin 1 assembly after locking. At the same time, by adjusting the depth of the external thread of the end fastener 3, the distance between the end fastener 3 and the upper surface of the trolley 10 can be changed, thereby enabling the fixing pin assembly to adapt to trolley equipment of different specifications and improving the adaptability of the fixing pin assembly.

[0039] Those skilled in the art will understand that the connection between the end fixing member and the fixing pin 1 in this application can also be a known connection method such as snap-fit ​​or welding. Any connection method that allows the end fixing member to be detachably connected to the second end of the fixing pin 1 is within the protection scope of this application.

[0040] Furthermore, the end fastener 3 is a hammer nut, and the outer wall of the hammer nut is provided with a protruding block 4. By striking the protruding block 4, the hammer nut can be fully tightened, thereby completely locking the trolley equipment.

[0041] Please refer to Figure 4-6 The fixing pin assembly also includes a detachable fixing pin cap 5. The inner wall of the fixing pin cap 5 is provided with an internal thread that matches the external thread. The top of the fixing pin cap 5 is provided with a connecting rib 6, and the connecting rib 6 has a lifting hole 7. In use, the fixing pin cap 5 is screwed into the second end of the fixing pin 1, thereby connecting the fixing pin cap 5 and the fixing pin 1 into a whole. The crane can lift the fixing pin 1 to the target position through the lifting hole 7. After the fixing pin 1 reaches the target position, the fixing pin cap 5 is removed so that the end fastener 3 can be connected to the fixing pin 1.

[0042] Furthermore, the portion with external threads on the outer wall of the second end constitutes the connecting section 8. The diameter of the connecting section 8 is smaller than the diameter of the fixing pin 1, and the sidewall thickness of the fixing pin cap 5 is not greater than the difference between the radius of the fixing pin 1 and the radius of the connecting section 8. In other words, the outer diameter of the fixing pin cap 5 is smaller than the outer diameter of the fixing pin 1. When the fixing pin cap 5 is screwed into the second end of the fixing pin 1, the outer edge of the fixing pin cap 5 does not exceed the outer edge of the fixing pin 1, ensuring that the fixing pin cap 5 and the fixing pin 1 can be sent to any position that can accommodate the maximum diameter of the fixing pin 1 by means of hoisting.

[0043] More specifically, it also includes an auxiliary locking protrusion 9, which is fixedly disposed on the side wall between the first and second ends of the fixing pin 1. The auxiliary locking protrusion 9 and the end fastener 3 constitute an auxiliary locking mechanism. In use, the auxiliary locking mechanism can press the target part to be locked between the auxiliary locking protrusion 9 and the end fastener 3.

[0044] Preferably, the auxiliary locking protrusion 9 is annular.

[0045] This application also discloses a trolley fixing pin fastening structure, including the aforementioned fixing pin assembly, trolley 10, and wellhead equipment 11. The trolley 10 has a locking hole that is adapted to the shape of the first end of the fixing pin 1 to allow the first end of the fixing pin 1 with the locking part 2 to pass through. The wellhead equipment 11 is stacked on the trolley 10, and the wellhead equipment 11 has a mounting through hole 12 aligned with the locking hole. The first end of the fixing pin 1 passes through the locking hole and rotates to achieve a locking connection with the locking hole. The second end of the fixing pin 1 extends out of the mounting through hole 12, and the end fastener 3 is fixed to the second end of the fixing pin 1 and presses the wellhead equipment 11 onto the trolley 10.

[0046] As a preferred embodiment, the bottom of the mounting hole has a mounting groove 13, the cross-section of the mounting groove 13 is circular, and the diameter of the mounting groove 13 is greater than the maximum rotation diameter of the first end of the fixing pin 1; the top of the mounting hole has a countersunk hole 14 extending from the upper surface of the trolley 10 to the mounting groove 13, and countersunk holes 15 adapted to the locking part 2 are provided on both sides of the countersunk hole 14 so that the first end of the locking part 2 can enter the mounting groove 13. The diameter of the countersunk hole 14 is greater than the diameter of the fixing pin 1, and the diameter of the countersunk hole 14 is less than the maximum rotation diameter of the first end of the fixing pin 1.

[0047] In use, connect the fixing pin cap 5 to the second end of the fixing pin 1. The crane lifts the fixing pin 1 onto the trolley 10 through the lifting hole 7 of the fixing pin cap 5. The fixing pin 1 passes through the first countersunk hole 14 and the second countersunk hole 15, so that the locking part 2 extends into the locking groove 13 of the locking hole. Then rotate the fixing pin 1 by 90°, and the fixing pin 1 can be locked onto the trolley 10 through the locking part 2. After the fixing pin 1 is locked and secured to the trolley 10, remove the fixing pin cap 5, and then lift the wellhead equipment 11 onto the trolley 10. The fixing pin 1 extends out from the installation through hole 12. Finally, screw the locking nut into the connecting section 8 of the pin shaft. When the locking nut begins to be under pressure, strike the protruding block 4 of the locking nut with a hammer to completely lock the locking nut, thereby completing the locking of the wellhead equipment 11. During the process of hammering and tightening the nut protrusion 4, the tightening of the nut will generate a huge downward thrust to squeeze the wellhead equipment 11, while the auxiliary locking protrusion 9 can provide an upward support force for the wellhead equipment 11, preventing deformation of the part of the trolley 10 with the clamping groove 13.

[0048] Furthermore, the upper surface of the trolley 10 is provided with a receiving groove 16 for accommodating the auxiliary locking protrusion 9, the depth of which is no greater than the thickness of the auxiliary locking protrusion 9.

[0049] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A trolley fixing pin fastening structure, characterized in that, include: trolley (10), fixing pin assembly; The retaining pin assembly includes: A fixing pin (1) has at least two snap-fit ​​parts (2) at the first end of its side wall. The snap-fit ​​parts (2) are fixedly disposed on the side wall of the fixing pin (1) and extend away from the axis of the fixing pin (1). The two snap-fit ​​parts (2) are spaced apart. An end fastener (3) is detachably connected to the second end of the fixing pin (1), and the outer diameter of the end fastener (3) is larger than the outer diameter of the fixing pin (1). It also includes an auxiliary locking protrusion (9), which is fixedly disposed on the side wall between the first end and the second end of the fixing pin (1). The auxiliary locking protrusion (9) and the end fastener (3) constitute an auxiliary locking mechanism. The auxiliary locking mechanism can press the target part to be locked between the auxiliary locking protrusion (9) and the end fastener (3). The outer side wall of the second end of the fixing pin (1) is provided with an external thread. The end fastener (3) is threadedly engaged with the fixing pin (1). The end fastener (3) is provided with an internal thread hole that matches the second end of the fixing pin (1). The trolley (10) has a snap-fit ​​hole that is adapted to the shape of the first end of the fixing pin (1) so as to allow the first end of the fixing pin (1) with the snap-fit ​​part (2) to pass through. The bottom of the mounting hole has a mounting groove (13), the cross-section of the mounting groove (13) is circular, and the diameter of the mounting groove (13) is greater than the maximum rotation diameter of the first end of the fixing pin (1).

2. The trolley fixing pin fastening structure according to claim 1, characterized in that: The snap-fit ​​portion (2) is evenly arranged around the fixed pin (1).

3. The trolley fixing pin fastening structure according to claim 1, characterized in that: The end fastener (3) is a hammer nut, and the outer wall of the hammer nut is provided with a protruding block (4).

4. The trolley fixing pin fastening structure according to claim 1, characterized in that: It also includes a detachable fixing pin cap (5), the inner wall of which is provided with an internal thread that matches the external thread, and the top of the fixing pin cap (5) is provided with a connecting rib (6), and the connecting rib (6) is provided with a lifting hole (7).

5. The trolley fixing pin fastening structure according to claim 4, characterized in that: The portion of the outer wall of the second end with external threads constitutes a connecting section (8). The diameter of the connecting section (8) is smaller than the diameter of the fixing pin (1), and the side wall thickness of the fixing pin cap (5) is not greater than the difference between the radius of the fixing pin (1) and the radius of the connecting section (8).

6. The trolley fixing pin fastening structure according to claim 1, characterized in that: The end of the snap-fit ​​part (2) away from the fixing pin (1) is arc-shaped.

7. The trolley fixing pin fastening structure according to claim 1, characterized in that, It also includes a wellhead device (11), which is stacked on the trolley (10) and has an installation through hole (12) aligned with the mounting hole. The first end of the fixing pin (1) passes through the mounting hole and rotates to achieve a mounting connection with the mounting hole. The second end of the fixing pin (1) extends out of the mounting through hole (12). The end fastener (3) is fixed to the second end of the fixing pin (1) and presses the wellhead equipment (11) onto the trolley (10).

8. The trolley fixing pin fastening structure according to claim 7, characterized in that: The top of the mounting hole has a countersunk hole one (14) extending from the upper surface of the trolley (10) to the mounting groove (13). On both sides of the countersunk hole one (14) are countersunk holes two (15) that are adapted to the locking part (2) so that the locking part (2) can enter the mounting groove (13). The diameter of the countersunk hole one (14) is larger than the diameter of the fixing pin (1), and the diameter of the countersunk hole one (14) is smaller than the maximum rotation diameter of the first end of the fixing pin (1).

Images