CN212201982U

CN212201982U - Locking device of rotary blowout preventer

Info

Publication number: CN212201982U
Application number: CN202020728248.0U
Authority: CN
Inventors: 汤麒麟; 曾涛; 熊涛
Original assignee: Sichuan Guoli Petroleum Engineering Co ltd
Current assignee: Sichuan Guoli Petroleum Engineering Co ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2020-12-22
Anticipated expiration: 2030-05-07

Abstract

The utility model discloses a locking device of a rotary blowout preventer, which comprises a boss arranged on the outer wall of a rotary blowout preventer assembly and an annular shell sleeved outside the boss, wherein the inner side cylindrical surface of the shell is provided with an annular groove, the radial section of the annular groove is rectangular, the inner side wall of the shell adjacent to the lower end surface of the annular groove is sequentially connected with a support ring and a claw adjusting ring from bottom to top, the outer side edges of the upper end surface and the lower end surface of the boss are respectively provided with an inclined surface, and the inner side edge of the upper end surface of the support ring is provided with an inclined surface matched with the; the annular groove is internally provided with a fan-shaped claw block, the shaft section of the claw block is in a shape like a Chinese character '7', the lower end face of the convex part of the inner side face of the claw block is an inclined plane, the height of the claw block is matched with that of the annular groove, and the outer side of the claw block is connected with a driving mechanism which extends out of the shell and is used for driving the claw block to move horizontally. The utility model discloses compact structure, occupation space are little, easy operation, and locking is reliable firm, the facilitate promotion.

Description

Locking device of rotary blowout preventer

Technical Field

The utility model relates to a preventer technical field, especially a rotatory preventer locking device.

Background

Known manual locking devices for rotary blowout preventers typically employ a band or bolt connection, and for example, the prior art patents 1254052, 2630481, 300689775 and 300689775 provide typical applications and appearances of several rotary blowout preventers and band and bolt locking connections thereof. When the rotary blowout preventer is used on site, due to the limitation of the height of a well head and the size of a rotary table, a clamp connection mode with a large structural size cannot be adopted frequently, and meanwhile, the connection mode of bolts cannot be used for improving efficiency and reducing the risk of drilling stoppage.

SUMMERY OF THE UTILITY MODEL

The clamp connection structure size that exists is great among the solution prior art, and the complicated problem that can not satisfy the field usage requirement of bolted connection structure dismouting, the utility model provides a rotatory preventer locking device adopts the claw piece of easy dismouting and easy operation's supporting bolt structure, dismantles simple to use simple to operate, has both guaranteed the locking of rotatory preventer assembly and has fixed, reduces connection structure's size again.

The utility model adopts the technical proposal that:

a locking device of a rotary blowout preventer comprises a boss arranged on the outer wall of a rotary blowout preventer assembly and an annular shell sleeved outside the boss, wherein an annular groove is formed in the inner side cylindrical surface of the shell, the radial cross section of the annular groove is rectangular, a support ring and a claw adjusting ring are sequentially connected to the inner side wall of the shell adjacent to the lower end face of the annular groove from bottom to top, inclined planes are respectively arranged at the outer side edges of the upper end face and the lower end face of the boss, and inclined planes matched with the inclined planes at the lower part of the boss are arranged at the inner side edge of the upper end face of the; the annular groove is internally provided with a fan-shaped claw block, the shaft section of the claw block is in a shape like a Chinese character '7', the lower end face of the convex part of the inner side face of the claw block is an inclined plane, the height of the claw block is matched with that of the annular groove, and the outer side of the claw block is connected with a driving mechanism which extends out of the shell and is used for driving the claw block to horizontally move; when the claw piece moves to and contacts with the inner wall cylinder of annular, the inside surface protruding portion of claw piece is located completely within the cylinder of the upper end of annular, when the claw piece moves to rotatory preventer assembly direction and the inclined plane of claw piece contacts with the inclined plane of boss upper end, the claw piece exerts to rotatory preventer assembly along this rotatory preventer assembly axial decurrent component force and makes rotatory preventer move downwards in order to fix rotatory preventer assembly, a part of claw piece is located within the cylinder of the upper end of annular, and another part is located outside this cylinder.

Preferably, the casing is equipped with the flank of screw on the inner wall adjacent with the lower terminal surface of annular, the outer wall of claw piece adjustable ring is equipped with the screw thread with flank of screw complex, the up end of claw piece adjustable ring is higher than the bottom surface of annular.

Preferably, the inner wall of the shell adjacent to the lower end face of the annular groove is provided with a sealing face below the threaded face, the inner diameter of the sealing face is smaller than that of the threaded face to form a step, and the lower end of the outer wall of the support ring is provided with a step matched with the step at the sealing face.

Preferably, the driving mechanism comprises a supporting bolt and a connecting screw, a threaded hole is radially formed in the middle of the outer wall of the claw block along the radial direction, a through hole corresponding to the threaded hole of the claw block is radially formed in the cylindrical surface of the inner wall of the annular groove along the radial direction, one end, close to the outer wall of the shell, of the through hole is a threaded hole with a diameter larger than that of the other end of the through hole, the supporting bolt is arranged in the threaded hole of the shell, a threaded cylindrical surface with a length larger than that of the threaded hole of the shell and matched with the threaded hole is arranged in the middle of the supporting bolt, the nut end of the supporting bolt is exposed out of the threaded hole, the end face, far away from the nut, of the supporting bolt is in contact with the outer wall of the claw block, a counter bore penetrating through the end faces of the two ends of the supporting bolt is arranged at, the nut of the connecting screw is positioned at the countersunk head of the countersunk hole, and the screw end of the connecting screw passes through the supporting bolt to be connected with the threaded hole of the claw block; the countersunk head of the countersunk head hole is polygonal, and the shape of the nut of the connecting screw is matched with that of the countersunk head hole.

Preferably, a bolt locking ring is arranged between the nut end of the supporting bolt and the outer wall of the shell.

Preferably, a plurality of claw blocks are arranged in the annular groove in a circumferential array by taking the axis of the annular groove as the center of circle.

Preferably, a support ring sealing ring is arranged between the support ring and the shell, a rotary blowout preventer assembly sealing ring is arranged between the lower end inclined plane of the boss and the inclined plane of the support ring, and a support bolt sealing ring is arranged between a non-threaded part at one end of the support bolt, which is far away from the nut, and a through hole in the inner wall of the annular groove.

Preferably, the up end of support ring uses the axle center of support ring as the centre of a circle to be the circumference array and is provided with a plurality of screw holes, the up end of claw piece adjustable ring uses the axle center of claw piece adjustable ring as the centre of a circle to be the circumference array and is provided with a plurality of screw holes, the middle part of the up end of claw piece is equipped with the screw hole.

Preferably, a mud guard plate is arranged between the upper end of the housing and the outer wall of the rotary blowout preventer assembly.

The utility model has the advantages that:

through the plurality of uniformly arranged claw blocks, the claw blocks and the supporting bolt are relatively fixed together by means of the connecting screws, and the raised inclined surfaces on the inner sides of the claw blocks are in contact with the inclined surfaces of the outer bosses of the rotary blowout preventer assembly and are pressed tightly by means of thread rotating torque, so that the rotary blowout preventer assembly is locked and sealed by means of threads, and the supporting bolt is locked by means of the bolt locking ring after the supporting bolt is in place, so that the claw blocks are not easy to loosen compared with other locking mechanisms, and the rotary blowout preventer assembly is safer and more stable; by applying the claw block adjusting ring, when the claw block locks the rotary blowout preventer assembly, the bottom of the claw block is supported, and the claw block cannot incline and loosen due to the axial component force; the utility model discloses compact structure, occupation space are little, easy operation, and locking is reliable firm, the facilitate promotion.

Drawings

Fig. 1 is a schematic view of an installation structure of a locking device in an embodiment of the present invention;

FIG. 2 is a schematic view of the locking device shown in FIG. 1 at detail A in a locked state;

FIG. 3 is a schematic view of the locking device shown in FIG. 1 at detail A in an unlocked state;

reference numerals: 1. the rotary blowout preventer comprises a shell, 2, a rotary blowout preventer assembly, 3, a support ring, 4, a claw block adjusting ring, 5, claw blocks, 6, a mud guard plate, 7, a bolt locking ring, 8, support bolts, 9, connecting screws, 10, support bolt sealing rings, 11, rotary blowout preventer assembly sealing rings, 12 and support ring sealing rings.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Examples

As shown in fig. 1 and 2, a locking device of a rotary blowout preventer comprises a boss arranged on the outer wall of a rotary blowout preventer assembly 2 and an annular shell 1 sleeved outside the boss, wherein an annular groove is arranged on the inner cylindrical surface of the shell 1, the radial cross section of the annular groove is rectangular, a support ring 3 and a claw adjusting ring 4 are sequentially connected to the inner side wall of the shell 1 adjacent to the lower end surface of the annular groove from bottom to top, inclined surfaces are respectively arranged at the outer side edges of the upper end surface and the lower end surface of the boss, and an inclined surface matched with the inclined surface at the lower part of the boss is arranged at the inner side edge of the upper end surface of the; a fan-shaped claw block 5 is arranged in the annular groove, the shaft section of the claw block 5 is in a shape like a Chinese character '7', the lower end face of the convex part of the inner side face of the claw block 5 is an inclined plane, the height of the claw block 5 is matched with that of the annular groove, and the outer side of the claw block 5 is connected with a driving mechanism which extends to the shell 1 and is used for driving the claw block 5 to horizontally move; when the claw block 5 moves to and contacts with the inner wall cylindrical surface of the annular groove, the convex part of the inner side surface of the claw block 5 is completely positioned in the cylindrical surface of the upper end of the annular groove, when the claw block 5 moves towards the direction of the rotary blowout preventer assembly 2 and the inclined surface of the claw block 5 contacts with the inclined surface of the upper end of the boss, the claw block 5 applies a component force which is downward along the axial direction of the rotary blowout preventer assembly 2 to the rotary blowout preventer assembly 2 so that the rotary blowout preventer moves downward to fix the rotary blowout preventer assembly 2, one part of the claw block 5 is positioned in the cylindrical surface of the upper end of the annular groove, and the other part of the.

The inclined plane of the claw block 5 and the inclined plane of the upper end of the boss have slightly smaller inclined angles than the inclined plane of the lower end of the boss, when in use, the driving mechanism drives the claw block 5 to move towards the direction of the rotary blowout preventer assembly 2, in the moving process, the inclined plane of the claw block 5 can be contacted with the inclined plane of the upper end of the boss, a force along the axial downward direction is applied to the rotary blowout preventer assembly 2 at the contact surface, the rotary blowout preventer assembly 2 moves downwards until the rotary blowout preventer assembly 2 cannot move, and finally the inclined planes of the upper end and the lower end of the boss are respectively in close contact with the inclined plane of the claw block 5 and the inclined plane of the support ring 3, so that the rotary blowout preventer assembly 2 is locked and fixed, at the moment, one part of the claw block 5 is positioned; as shown in fig. 3, when the rotary blowout preventer assembly 2 needs to be unlocked, the driving mechanism drives the claw block 5 to move towards the direction away from the rotary blowout preventer assembly 2, in the moving process, the claw block 5 releases the pressure on the inclined plane at the upper end of the boss, when the claw block 5 moves to be in contact with the cylindrical surface of the inner wall of the annular groove, at this time, the convex part at the inner side of the claw block 5 is completely positioned within the cylindrical surface at the upper end of the annular groove, and the rotary blowout preventer assembly 2 can be freely taken out upwards.

In one embodiment, the inner wall of the shell 1 adjacent to the lower end face of the ring groove is provided with a threaded surface, the outer wall of the claw adjusting ring 4 is provided with threads matched with the threaded surface, and the upper end face of the claw adjusting ring 4 is higher than the bottom face of the ring groove.

The claw piece adjusting ring 4 is connected with the inner wall of the shell 1 through threads, the claw piece adjusting ring 4 can slide upwards and downwards along the axial direction through rotating the threads of the claw piece adjusting ring 4, the upper end face of the claw piece adjusting ring 4 is slightly higher than the bottom face of the rectangular annular groove of the shell 1, and when the claw piece 5 is locked to the rotary blowout preventer assembly 2, the claw piece 5 is clamped by the annular groove and the claw piece adjusting ring 4, and is prevented from loosening.

In one embodiment, a sealing surface is further arranged on the inner wall of the shell 1 adjacent to the lower end face of the annular groove and below the threaded surface, the inner diameter of the sealing surface is smaller than that of the threaded surface to form a step, and the lower end of the outer wall of the support ring 3 is provided with a step matched with the step at the sealing surface.

The support ring 3 is arranged at the step of the shell 1, and can support the support ring 3 to prevent the support ring 3 from sliding downwards. The support ring 3 and the claw adjusting ring 4 can be separate independent parts or can be integrally combined into one part.

In one embodiment, the driving mechanism includes a supporting bolt 8 and a connecting screw 9, a threaded hole is radially formed in the middle of the outer wall of the claw block 5, a through hole corresponding to the threaded hole of the claw block 5 is radially formed in the cylindrical surface of the inner wall of the annular groove, one end of the through hole close to the outer wall of the shell 1 is a threaded hole with a diameter larger than the diameter of the other end of the through hole, the supporting bolt 8 is arranged in the threaded hole of the shell 1, a threaded cylindrical surface which is longer than the threaded hole of the shell 1 and is matched with the threaded hole is arranged in the middle of the supporting bolt 8, the nut end of the supporting bolt 8 is exposed out of the threaded hole, the end surface of the end part of the supporting bolt 8, far away from the nut, is in contact with the outer wall of the claw block 5, a countersunk hole penetrating through the end surfaces of the two ends of the supporting bolt 8 is arranged at, the connecting screw 9 is arranged in the countersunk head hole, the nut of the connecting screw 9 is positioned at the countersunk head of the countersunk head hole, and the screw end of the connecting screw 9 passes through the supporting bolt 8 to be connected with the threaded hole of the claw block 5; the countersunk head of the countersunk hole is polygonal, and the shape of the nut of the connecting screw 9 is matched with that of the countersunk head of the countersunk hole.

Specifically, the nut and the countersunk head of the connecting screw 9 and the nut of the connecting screw 9 are all regular hexagons, and due to the limiting effect of the countersunk head hole of the supporting bolt 8 on the nut end of the connecting screw 9, the claw block 5 and the supporting bolt 8 are equivalently rotatably connected together, and the claw block 5 can move back and forth relative to the central shaft of the rotary blowout preventer assembly 2 by rotating the supporting bolt 8 forwards or reversely. The pitch of the thread of the threaded cylindrical surface of the stay bolt 8 is set to be small, and the position of the claw piece 5 does not move even by an external force because the pitch of the thread of the stay bolt 8 is small.

In one embodiment, a bolt locking ring 7 is arranged between the nut end of the supporting bolt 8 and the outer wall of the shell 1.

The bolt locking ring 7 is of a regular hexagon nut structure and is arranged between the nut end of the supporting bolt 8 and the outer wall of the shell 1, when the supporting bolt 8 is rotated inwards to clamp the claw block 5 and lock the rotary blowout preventer assembly 2, the bolt locking ring 7 is rotated to be in contact with the outer wall of the shell 1, and the supporting bolt 8 cannot be buckled or loosened due to vibration due to thread pretightening force.

In one embodiment, a plurality of claw blocks 5 are arranged in the ring groove in a circumferential array with the axis of the ring groove as the center.

A plurality of claw blocks 5 through the equipartition lock rotatory preventer assembly 2, make rotatory preventer assembly 2 atress more balanced, avoid producing the skew, lock more reliably.

In one embodiment, a support ring sealing ring 12 is arranged between the support ring 3 and the shell 1, a rotary blowout preventer assembly sealing ring 11 is arranged between the inclined plane of the lower end of the boss and the inclined plane of the support ring 3, and a support bolt sealing ring 10 is arranged between a non-threaded part at one end of the support bolt 8, which is far away from the nut, and a through hole in the inner wall of the annular groove.

The key connections within the device and between the device and the rotary blowout preventer assembly 2 are sealed by the respective sealing rings to prevent the ingress of other media.

In one embodiment, the upper end surface of the support ring 3 is provided with a plurality of threaded holes in a circumferential array around the axis of the support ring 3, the upper end surface of the claw adjusting ring 4 is provided with a plurality of threaded holes in a circumferential array around the axis of the claw adjusting ring 4, and the middle part of the upper end surface of the claw 5 is provided with a threaded hole.

When taking out or installing support ring 3, claw piece adjustable ring 4, claw piece 5, the screw hole on it is connected to the accessible screw rod, conveniently takes to snatch support ring 3, claw piece adjustable ring 4, claw piece 5.

In one embodiment, a fender 6 is provided between the upper end of the housing 1 and the outer wall of the rotary blowout preventer assembly 2.

The fender 6 provides water and mud protection to the interior of the device.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. The locking device of the rotary blowout preventer is characterized by comprising a boss arranged on the outer wall of a rotary blowout preventer assembly (2) and an annular shell (1) sleeved outside the boss, wherein an annular groove is formed in the inner side cylindrical surface of the shell (1), the radial cross section of the annular groove is rectangular, a support ring (3) and a claw block adjusting ring (4) are sequentially connected to the inner side wall, adjacent to the lower end face of the annular groove, of the shell (1) from bottom to top, inclined planes are respectively arranged at the outer side edges of the upper end face and the lower end face of the boss, and inclined planes matched with the inclined planes at the lower part of the boss are arranged at the inner side edge of the upper end face of the support ring; a fan-shaped claw block (5) is arranged in the annular groove, the shaft section of the claw block (5) is in a shape like a Chinese character '7', the lower end face of the convex part of the inner side face of the claw block (5) is an inclined plane, the height of the claw block (5) is matched with that of the annular groove, and the outer side of the claw block (5) is connected with a driving mechanism which extends to the shell (1) and is used for driving the claw block (5) to horizontally move; when dog piece (5) move to contact with the inner wall cylinder of annular, the protruding part of the medial surface of dog piece (5) is located completely within the cylinder of the upper end of annular, when dog piece (5) move and the inclined plane of dog piece (5) contacts with the inclined plane of boss upper end to rotatory preventer assembly (2) direction, dog piece (5) exert along this rotatory preventer assembly (2) axial decurrent component force to rotatory preventer assembly (2) and make rotatory preventer move down with fixed rotatory preventer assembly (2), dog piece (5) partly are located within the cylinder of the upper end of annular, and another part is located outside this cylinder.

2. The locking device of a rotary blowout preventer according to claim 1, characterized in that the inner wall of the housing (1) adjacent to the lower end face of the annular groove is provided with a threaded surface, the outer wall of the dog adjustment ring (4) is provided with a thread cooperating with the threaded surface, and the upper end face of the dog adjustment ring (4) is higher than the bottom face of the annular groove.

3. A locking arrangement of a rotary blow out preventer according to claim 2, characterized in that the inner wall of the housing (1) adjacent to the lower end face of the annular groove is also provided with a sealing surface below the threaded surface, the sealing surface having an inner diameter which is smaller than the inner diameter of the threaded surface forming a step, the lower end of the outer wall of the support ring (3) having a step matching the step at the sealing surface.

4. The locking device of the rotary blowout preventer according to claim 1, wherein the driving mechanism comprises a supporting bolt (8) and a connecting screw (9), a threaded hole is formed in the middle of the outer wall of the claw block (5) along the radial direction of the supporting bolt, a through hole corresponding to the threaded hole of the claw block (5) is formed in the cylindrical surface of the inner wall of the annular groove along the radial direction of the annular groove, one end of the through hole close to the outer wall of the housing (1) is a threaded hole with a diameter larger than that of the other end of the through hole, the supporting bolt (8) is arranged in the threaded hole of the housing (1), a threaded cylindrical surface with a length larger than that of the threaded hole of the housing (1) and matched with the threaded hole is arranged in the middle of the supporting bolt (8), the nut end of the supporting bolt (8) is exposed out of the threaded hole, and the end surface of the end of the, the axis of the supporting bolt (8) is provided with a countersunk hole penetrating through the end faces of the two ends of the supporting bolt, the countersunk end of the countersunk hole is positioned in the nut of the supporting bolt (8), the connecting screw (9) is arranged in the countersunk hole, the nut of the connecting screw (9) is positioned at the countersunk position of the countersunk hole, and the screw end of the connecting screw (9) penetrates through the supporting bolt (8) and is connected with the threaded hole of the claw block (5); the countersunk head of the countersunk hole is polygonal, and the shape of the nut of the connecting screw (9) is matched with that of the countersunk head of the countersunk hole.

5. A locking arrangement of a rotary blowout preventer according to claim 4, characterized in that a bolt locking ring (7) is provided between the nut end of the support bolt (8) and the outer wall of the housing (1).

6. Locking device of the rotary blowout preventer according to claim 5, characterized in that a plurality of dogs (5) are arranged in the ring groove in a circumferential array around the axis of the ring groove.

7. Locking device of the rotating blowout preventer according to claim 6, characterized in that a support ring sealing ring (12) is arranged between the support ring (3) and the housing (1), a rotating blowout preventer assembly sealing ring (11) is arranged between the lower end inclined plane of the boss and the inclined plane of the support ring (3), and a support bolt sealing ring (10) is arranged between the non-threaded portion of the end of the support bolt (8) remote from its nut and the through hole of the inner wall of the annular groove.

8. The locking device of the rotary blowout preventer according to claim 7, characterized in that the upper end surface of the support ring (3) is provided with a plurality of threaded holes in a circumferential array around the axis of the support ring (3), the upper end surface of the dog adjustment ring (4) is provided with a plurality of threaded holes in a circumferential array around the axis of the dog adjustment ring (4), and the middle of the upper end surface of the dog (5) is provided with a threaded hole.

9. Locking device of the rotary blowout preventer according to claim 8, characterized in that a fender (6) is provided between the upper end of the housing (1) and the outer wall of the rotary blowout preventer assembly (2).