Locking assembly and casing head connection control device

Abstract

The invention relates to the field of casing heads, in particular to a locking assembly and casing head connection control device.The locking assembly and casing head connection control device comprises a casing head, a pressure-bearing assembly and a limiting control assembly, a mounting disc is horizontally arranged at the upper end of the casing head, a hanger is vertically inserted into the center of the casing head, and the pressure-bearing assembly is inserted into the mounting disc through the limiting control assembly; the pressure-bearing abutting rods are connected in an adjustable control mode through the combined movable seats, and when the conical abutting blocks on one sides of the pressure-bearing abutting rods need to be connected with the hanger in an abutting mode, the multiple combined movable seats, the pressure-bearing abutting rods and the conical abutting blocks can be synchronously and movably controlled through the limiting control assembly; operation convenience and self-locking limiting of connection of the multiple pressure-bearing abutting rods and the hanger are achieved, in addition, the pressure-bearing abutting rods and the combined movable base are adjustably connected, when the contact condition of the single pressure-bearing abutting rod and the hanger needs to be adjusted, rapid adjustment can be conducted, and after adjustment is finished, the structure is stable and reliable.

Description

Technical Field

[0001] The invention relates to the field of casing heads, in particular to a locking assembly and a casing head connection control device. Background Art

[0002] Prior art patent CN11264788 guide placement groove 5 discloses a casing head for preventing leakage at an oilfield wellhead, including a casing body, a primary casing, a secondary casing, a connecting rib plate, a connecting transverse plate, a fixing plate, a valve, a casing head, a top screw, a top screw pressure cap, a fixing bolt, a mounting hole, an elastic fixing ring, a sealing gasket, a mounting plate, a sealing cover, a slot, a filling layer, a connecting block and a fixing bolt. A shock-absorbing gasket is provided between the secondary casing and the connecting transverse plate to reduce vibration. A sealing gasket is provided at the connection between the primary casing and the secondary casing to improve the sealing performance. The top screw passes through the casing head radially to facilitate locking the hanger through the top screw. Two sets of annular elastic fixing rings are provided on the inner side of the casing head to improve the sealing performance of the casing head. Rods are provided at both ends of the sealing cover, and the size of the rods matches the slot to improve the fixing efficiency of the sealing cover.

[0003] Depending on the usage scenario and the different downhole environmental values, the casing head will use a high-pressure casing head with multiple top screws to connect the wellhead pipeline. When multiple top screws are used to pressurize the hanger in the casing head, the operation and use of multiple top screws are relatively cumbersome. After the installation and fixation are completed, the threads may become loose as the pipeline vibrates during use, affecting the pressure-bearing effect and safety of the wellhead connection, making it inconvenient to use. Summary of the invention

[0004] The object of the present invention is to provide a locking assembly and a casing head connection control device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a locking assembly, comprising:

[0006] A casing head, wherein a mounting plate is horizontally disposed on the upper end of the casing head, and a hanger is vertically inserted in the center of the casing head;

[0007] A pressure-bearing component, wherein the pressure-bearing component is inserted into the mounting plate by limiting the control component, and the pressure-bearing component includes a plurality of combined movable seats and a plurality of pressure-bearing abutting rods. A plurality of guide placement grooves are horizontally opened on the outer peripheral side of the mounting plate, and the plurality of combined movable seats are respectively horizontally inserted into the plurality of guide placement grooves, and the plurality of pressure-bearing abutting rods are respectively inserted into one side of the plurality of combined movable seats;

[0008] The limiting control component is horizontally arranged at the lower end of the installation plate. The limiting control component includes an annular control plate and a control gear. One side of a plurality of combined movable seats is respectively connected to the annular control plate.

[0009] Preferably, a plurality of mounting holes are vertically penetrated through the mounting plate, and the plurality of mounting holes are staggered with the plurality of guide placement grooves.

[0010] Preferably, one side of the guide placement groove is provided with an extension groove passing through the center of the casing head, an internal thread groove is provided passing through the center of the combined movable seat, one side of the pressure-bearing abutment rod is threadedly inserted into the internal thread groove of the combined movable seat, and the side of the pressure-bearing abutment rod away from the combined movable seat is inserted into the extension groove and provided with a conical abutment block, and a plurality of conical abutment blocks are arranged corresponding to the hanger.

[0011] Preferably, a receiving groove is provided in the inner thread groove on one side away from the conical abutment block, a fine-tuning screw head is provided on one side of the pressure-bearing abutment rod disposed in the receiving groove, and a fine-tuning area is provided between the fine-tuning screw head and the side wall in the receiving groove.

[0012] Preferably, the upper and lower ends of the storage groove are respectively penetrated with limit strip grooves, a pin groove is vertically opened on one side of the fine-tuning screw head, a limit pin is vertically inserted in the pin groove, and the limit pin penetrates the two sides of the pin groove and moves through the two limit strip grooves respectively.

[0013] Preferably, a rotation groove is horizontally opened in the installation plate below the guide placement groove, the spiral gear ring is horizontally movably inserted in the rotation groove, and the rotation groove is staggered with the plurality of installation holes.

[0014] Preferably, a first annular groove is provided at the upper end of the rotation groove, which is connected to the lower end of several guide placement grooves. The annular control disk is located at the upper end of the first annular groove and is horizontally provided with a spiral gear ring. The spiral teeth at the upper end of the spiral gear ring are inserted into several guide placement grooves. A number of meshing tooth grooves are provided at the lower end of the combined movable seat, and the several combined movable seats are respectively meshed and connected with the upper end of the spiral gear ring through the meshing tooth grooves.

[0015] Preferably, a second annular groove is opened on one side of the lower end of the rotation groove, an annular control disk is provided with a control gear ring at the lower end of the second annular groove, a mounting disk is vertically opened with a gear groove at the lower end of the second annular groove, a control gear is vertically provided in the gear groove, and the upper end of the control gear is meshed and connected with the lower end of the control gear ring.

[0016] Preferably, a damping rotating groove is horizontally opened on one side of the mounting plate close to the gear groove, a control joint is rotatably plugged in the damping rotating groove, a gear shaft is horizontally provided at the center of one side of the control gear close to the control joint, the gear shaft horizontally penetrates the plug-in damping rotating groove through a bearing and is connected to the center of one side of the control joint.

[0017] A casing head connection control device comprises the locking assembly.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The pressure-bearing abutment rod is adjustably controlled and connected through the combined movable seat. When the conical abutment block on one side of the pressure-bearing abutment rod needs to be abutted and connected with the hanger, a plurality of combined movable seats together with the pressure-bearing abutment rod and the conical abutment block can be synchronously controlled through the limited control component, so as to realize the operational convenience of connecting multiple pressure-bearing abutment rods with the hanger and the self-locking limit. In addition, the adjustable connection between the pressure-bearing abutment rod and the combined movable seat can be quickly adjusted when the contact condition between a single pressure-bearing abutment rod and the hanger needs to be adjusted, and the structure is stable and reliable after the adjustment is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 Schematic diagram of part A;

[0022] Figure 3 It is a schematic side cut diagram of the structure of the present invention;

[0023] Figure 4 For the present invention Figure 3 Schematic diagram of part B;

[0024] Figure 5 For the present invention Figure 4 Schematic diagram of the C part;

[0025] Figure 6 This is a schematic diagram of the matching structure of the combined movable seat and the annular control disk of the present invention;

[0026] Figure 7 It is a schematic diagram of the matching structure of the combined movable seat 7 and the pressure-bearing abutment rod 9 of the present invention.

[0027] In the figure: casing head 1, mounting plate 2, mounting hole 3, hanger 4, guide placement groove 5, extension groove 6, combined movable seat 7, internal thread groove 8, pressure-bearing abutment rod 9, tapered abutment block 10, fine-tuning screw head 11, storage groove 12, limit strip groove 13, pin groove 14, limit pin 15, rotation groove 16, annular control plate 17, spiral gear ring 18, control gear ring 19, meshing tooth groove 20, gear shaft 21, gear groove 22, control gear 23, damping rotation groove 24, control joint 25. DETAILED DESCRIPTION

[0028] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail 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, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of 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.

[0029] See also Figure 1-Figure 7 , the present invention provides the following technical solutions:

[0030] Embodiment 1: A locking assembly comprises a casing head 1 and a pressure-bearing assembly, a mounting plate 2 is horizontally provided at the upper end of the casing head 1, a hanger 4 is vertically inserted in the center of the casing head 1, the pressure-bearing assembly is inserted into the mounting plate 2 by limiting the control assembly, the pressure-bearing assembly comprises a plurality of combined movable seats 7 and a plurality of pressure-bearing abutting rods 9, a plurality of guide placement grooves 5 are horizontally provided on the outer peripheral side of the mounting plate 2, a plurality of combined movable seats 7 are respectively horizontally inserted into the plurality of guide placement grooves 5, a plurality of pressure-bearing abutting rods 9 are respectively inserted into one side of the plurality of combined movable seats 7, a plurality of mounting holes 3 are vertically penetrated through the mounting plate 2, a plurality of mounting holes 3 are staggered with a plurality of guide placement grooves 5, and the staggered setting of the mounting holes 3 and the guide placement grooves 5 facilitates the bolt connection between the casing head 1 and the upper wellhead device, and after the connection, the horizontal movement of the combined movable seats 7 of the guide placement grooves 5 is not affected.

[0031] One side of the guide placement groove 5 passes through the center of the casing head 1 and is provided with an extension groove 6. The center of the combined movable seat 7 passes through an internal thread groove 8. One side of the pressure-bearing abutment rod 9 is threadedly inserted into the internal thread groove 8 of the combined movable seat 7. The side of the pressure-bearing abutment rod 9 away from the combined movable seat 7 is inserted into the extension groove 6 and is provided with a conical abutment block 10, and several conical abutment blocks 10 are arranged corresponding to the hanger 4. When the combined movable seat 7 and the pressure-bearing abutment rod 9 move toward the side of the hanger 4, the conical abutment blocks 10 of the pressure-bearing abutment rods 9 respectively abut against the upper end side of the hanger 4, thereby improving the pressure-bearing capacity of the hanger 4 when the pipeline is connected.

[0032] A limiting control component is provided to control and self-lock the horizontal movement of the combined movable seat 7. The limiting control component is horizontally arranged at the lower end of the mounting plate 2. The limiting control component includes an annular control plate 17 and a control gear 23. One side of several combined movable seats 7 are respectively connected to the annular control plate 17. A self-rotation groove 16 is horizontally opened below the guide placement groove 5 in the mounting plate 2. The spiral gear ring 18 is horizontally movably inserted in the self-rotation groove 16, and the self-rotation groove 16 is staggered with several mounting holes 3, which is similar to the position principle of the mounting holes 3. During use, it does not affect the normal movement of the combined movable seat 7 in the guide placement groove 5.

[0033] A first annular groove is provided at the upper end of the rotation groove 16, which is connected to the lower end of several guide placement grooves 5. The annular control disk 17 is located at the upper end of the first annular groove and is horizontally provided with a spiral gear ring 18. The spiral teeth at the upper end of the spiral gear ring 18 are inserted into several guide placement grooves 5. A plurality of meshing tooth grooves 20 are provided at the lower end of the combined movable seat 7, and several combined movable seats 7 are respectively meshed and connected with the upper end of the spiral gear ring 18 through the meshing tooth grooves 20. When the annular control disk 17 rotates horizontally, the annular control disk 17 controls the spiral gear ring 18 to rotate synchronously. At this time, the spiral gear ring 18 drives several combined movable seats 7 simultaneously through the spiral teeth, so that several combined movable seats 7 drive the pressure-bearing abutment rod 9 and the conical abutment block 10 to move the position of the hanger 4, thereby improving the operating convenience of multiple combined movable seats 7.

[0034] A second annular groove is provided on one side of the lower end of the rotation groove 16, and a control gear ring 19 is provided on the annular control disk 17 located at the lower end of the second annular groove. A gear groove 22 is vertically provided on the lower end of the mounting disk 2 located at the second annular groove, and a control gear 23 is vertically provided in the gear groove 22, and the upper end of the control gear 23 is meshed and connected with the lower end of the control gear ring 19. A damping rotation groove 24 is horizontally provided on one side of the mounting disk 2 close to the gear groove 22, and a control joint 25 is rotatably plugged in the damping rotation groove 24. A gear shaft 21 is horizontally provided at the center of one side of the control gear 23 close to the control joint 25, and the gear shaft 21 horizontally penetrates the damping rotation groove 24 through a bearing and is connected to the center of one side of the control joint 25. Through the rotation of the control joint 25, the control gear 23 controls the rotation of the annular control disk 17 connected to the control gear ring 19, thereby completing the activity control of several combined movable seats 7.

[0035] In this embodiment, when it is necessary to drive several combined movable seats 7 at the same time, the control joint 25 is rotated to make the control joint 25 control the control gear 23 to rotate. At this time, the control gear 23 drives the annular control disk 17 connected to the control gear ring 19 to rotate horizontally, and then the spiral gear ring 18 controls the several combined movable seats 7, the pressure-bearing abutment rod 9 and the conical abutment block 10 to move toward the hanger 4. When the several conical abutment blocks 10 are respectively overlapped with the upper end of the hanger 4, the use state of the casing head 1 is maintained at a high pressure. At this time, since the combined movable seat 7 and the spiral gear ring 18 are connected by spiral teeth, when the annular control disk 17 does not rotate, the combined movable seat 7 is self-locking and fixed, thereby improving the stability of high pressure.

[0036] Embodiment 2: On the basis of embodiment 1, when it is necessary to independently rotate and adjust a single combined movable seat 7, quick operation control can be performed, a receiving groove 12 is provided on the side of the internal thread groove 8 away from the conical abutment block 10, a pressure-bearing abutment rod 9 is placed in the receiving groove 12 and a fine-tuning screw head 11 is provided on one side, and a fine-tuning area is provided on the side wall of the fine-tuning screw head 11 and the receiving groove 12, and a limited position strip groove 13 is respectively penetrated at the upper and lower ends of the receiving groove 12, a pin groove 14 is vertically provided on one side of the fine-tuning screw head 11, a limit pin 15 is vertically inserted in the pin groove 14, and the limit pin 15 penetrates the two sides of the pin groove 14 and movably penetrates the two limit strip grooves 13, when several combined movable seats 7 respectively control the abutment of the conical abutment block 10 with the hanger 4. When the abutment effect of the conical abutment block 10 with the hanger 4 in some places is not ideal, remove the limit pin 15, rotate the fine-tuning screw head 11 and the pressure-bearing abutment rod 9, so that the pressure-bearing abutment rod 9 rotates in the internal thread groove 8 of the combined movable seat 7 through the thread, and fine-tunes the abutment state of the conical abutment block 10 with the hanger 4. After the adjustment, keep the pin groove 14 vertical, and fix the limit pin 15 through the limit strip groove 13 and the pin groove 14. At this time, the pressure-bearing abutment rod 9 is rotated and limited under the action of the limit pin 15 and the limit strip groove 13, and the position of the pressure-bearing abutment rod 9 and the conical abutment block 10 is locked and limited.

[0037] A casing head connection control device, the control device comprising the above locking assembly. Although the embodiments of the present invention have been shown and described, it is understood 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 present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A locking assembly, characterized in that: include: A casing head (1), wherein a mounting plate (2) is horizontally provided at the upper end of the casing head (1), and a hanger (4) is vertically inserted in the center of the casing head (1); A pressure-bearing component, wherein the pressure-bearing component is inserted into the mounting plate (2) by limiting the control component, the pressure-bearing component comprises a plurality of combined movable seats (7) and a plurality of pressure-bearing abutting rods (9), a plurality of guide placement grooves (5) are horizontally opened on the outer peripheral side of the mounting plate (2), the plurality of combined movable seats (7) are respectively inserted horizontally into the plurality of guide placement grooves (5), and the plurality of pressure-bearing abutting rods (9) are respectively inserted into one side of the plurality of combined movable seats (7); The limiting control assembly is horizontally arranged at the lower end of the mounting plate (2), and comprises an annular control plate (17) and a control gear (23). One side of a plurality of combined movable seats (7) is respectively connected to the annular control plate (17).

2. A locking assembly according to claim 1, characterized in that: The installation plate (2) is provided with a plurality of installation holes (3) vertically penetrating therethrough, and the plurality of installation holes (3) and the plurality of guide placement grooves (5) are arranged in a staggered manner.

3. A locking assembly according to claim 2, characterized in that: One side of the guide placement groove (5) is provided with a protruding groove (6) penetrating through the center of the casing head (1), and an internal thread groove (8) is penetrating through the center of the combined movable seat (7). One side of the pressure-bearing abutment rod (9) is inserted into the internal thread groove (8) of the combined movable seat (7) through a thread. The side of the pressure-bearing abutment rod (9) away from the combined movable seat (7) is inserted into the protruding groove (6) and is provided with a conical abutment block (10), and a plurality of conical abutment blocks (10) are arranged corresponding to the hanger (4).

4. A locking assembly according to claim 3, characterized in that: A receiving groove (12) is provided on the side of the internal thread groove (8) away from the conical abutment block (10), a fine-tuning screw head (11) is provided on the side of the pressure-bearing abutment rod (9) disposed in the receiving groove (12), and a fine-tuning area is provided between the fine-tuning screw head (11) and the side wall in the receiving groove (12).

5. A locking assembly according to claim 4, characterized in that: The storage groove (12) has limit strip grooves (13) respectively formed at the upper and lower ends thereof, a pin groove (14) is vertically formed on one side of the fine-tuning screw head (11), a limit pin (15) is vertically inserted in the pin groove (14), and the limit pin (15) passes through both sides of the pin groove (14) and movably passes through the two limit strip grooves (13).

6. A locking assembly according to claim 5, characterized in that: A self-rotation groove (16) is horizontally provided in the installation plate (2) below the guide placement groove (5), and a spiral gear ring (18) is horizontally movably inserted in the self-rotation groove (16), and the self-rotation groove (16) is staggered with a plurality of installation holes (3).

7. A locking assembly according to claim 6, characterized in that: The upper end of the self-rotating groove (16) is connected to the lower end of the plurality of guide placement grooves (5) and is provided with a first annular groove. The annular control disk (17) is located at the upper end of the first annular groove and is horizontally provided with a spiral gear ring (18). The spiral teeth at the upper end of the spiral gear ring (18) are inserted into the plurality of guide placement grooves (5). The lower end of the combined movable seat (7) is provided with a plurality of meshing tooth grooves (20), and the plurality of combined movable seats (7) are respectively meshed and connected with the upper end of the spiral gear ring (18) through the meshing tooth grooves (20).

8. A locking assembly according to claim 7, characterized in that: A second annular groove is provided on one side of the lower end of the rotation groove (16); a control gear ring (19) is provided on the annular control disk (17) located at the lower end of the second annular groove; a gear groove (22) is vertically provided on the mounting disk (2) located at the lower end of the second annular groove; a control gear (23) is vertically provided in the gear groove (22); and the upper end of the control gear (23) is meshed and connected with the lower end of the control gear ring (19).

9. A locking assembly according to claim 8, characterized in that: A damping rotating groove (24) is horizontally provided on one side of the mounting plate (2) close to the gear groove (22), a control joint (25) is rotatably plugged in the damping rotating groove (24), a gear shaft (21) is horizontally provided at the center of one side of the control gear (23) close to the control joint (25), the gear shaft (21) horizontally penetrates the plug-in damping rotating groove (24) through a bearing and is connected to the center of one side of the control joint (25).

10. A casing head connection control device, characterized in that: The control device comprises the locking assembly as described in any one of claims 1 to 9.

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