CN217106879U

CN217106879U - Auxiliary centering mechanism

Info

Publication number: CN217106879U
Application number: CN202220198064.7U
Authority: CN
Inventors: 许波兵; 何云华; 马强维; 缪鑫; 张建; 陈世龙
Original assignee: Jiangsu Rutong Petro Machinery Co ltd
Current assignee: Jiangsu Rutong Petro Machinery Co ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-08-02
Anticipated expiration: 2032-01-25

Abstract

The utility model discloses an auxiliary centering mechanism, including the semicircular ring shape mount pad of bilateral symmetry, with right the jar and right the frame that the mount pad one-to-one set up, the inner peripheral surface of right the frame is fixed with the inboard guide ring that is biarc eccentric structure, right the outer peripheral face left side tip of frame and mount pad articulated mutually, right the outer peripheral face right side of frame and be close to the position in the middle and be connected with the tailpiece of the piston rod portion of right the jar, right the preceding tip of the cylinder body of jar and mount pad articulated mutually, right the cylinder body rear end of jar and be close to the outer peripheral face right side tip activity setting of right the frame. The utility model discloses greatly improved whole operation security, promoted the tubular column centering and right the effect and right stability.

Description

Auxiliary centering mechanism

Technical Field

The utility model relates to an oil drilling operation equipment field, concretely relates to supplementary centering mechanism is applicable to on the power slips equipment.

Background

The power slips are frequently exposed to the problem that tubular columns such as oil pipes, drill rods and the like deviate from the center of a wellhead in the working process, particularly when the power slips are closed; however, such problems not only result in the power slip not being able to clamp the pipe string correctly and reliably, seriously affecting the normal drilling professional, increasing the labor intensity of workers, but also result in the pipe string slipping, even causing damage to the power slip equipment, and causing safety accidents.

In view of the above problems, chinese patent, publication No. CN 212656784U discloses a novel hydraulic chuck, and its specification and fig. 4 disclose that the inner side of the upper cover is provided with a centering block, a rotating arm for rotating the centering block is provided between the upper cover and the centering block, the upper cover is provided with an upper hydraulic cylinder for driving the centering block, the upper hydraulic cylinder is mounted on the upper cover through a hydraulic cylinder mounting plate, and the rotating arm is mounted on the inner side of the upper cover through a pin. The prior art does not disclose a specific transmission mode among the rotating arm, the upper hydraulic cylinder and the centering block and a specific structure after connection, cannot completely ensure the connection stability, connection flexibility and connection pressure-bearing capacity of the rotating arm, the upper hydraulic cylinder and the centering block, has general operation safety and flexibility, does not disclose a specific working structure of the centering block, has limited corresponding centering effect and is low in centering stability.

For this reason, a new technical solution is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an auxiliary centering mechanism to solve the current tubular column righting mechanism that proposes in the above-mentioned background art, its whole operation security is general, and the centering effect is limited, rights the technical problem that stability is low.

In order to achieve the purpose, the utility model adopts the following technical proposal:

an auxiliary centering mechanism comprises a semicircular installing seat which is symmetrical left and right, a centering cylinder and a centering frame which are arranged corresponding to the installing seat one by one, a guide ring with a double-arc eccentric structure on the inner side is fixed on the inner peripheral surface of the righting frame, the guide ring is a semicircular guide ring, an arc reducing surface is formed on the inner side of the guide ring, the arc diameter-changing surface consists of an arc surface I in the middle and arc surfaces II at two ends, the circle center of the arc surface I and the circle center of the arc surface II are both positioned on the central line of the guide ring, the radius of the arc surface II is larger than that of the arc surface I, the left end part of the outer peripheral surface of the righting frame is hinged with the mounting seat, the right side of the outer peripheral surface of the righting frame is connected with the end part of a piston rod of the righting cylinder at a position close to the middle, the front end part of the cylinder body of the righting cylinder is hinged with the mounting seat, and the rear end part of the cylinder body of the righting cylinder is movably arranged close to the right end part of the outer peripheral surface of the righting frame;

furthermore, the centering frame comprises a centering frame body in a semicircular structure, the end part of the left side of the periphery of the centering frame body horizontally extends to form a rotating end, the position of the left side of the periphery of the centering frame body close to the middle horizontally extends to form a guide plate, the position of the right side of the periphery of the centering frame body close to the middle horizontally extends to form a moving end, the mounting seat comprises a mounting plate in a semicircular structure, a centering frame fixing seat, a transition block, a guide block and a centering cylinder fixing seat are sequentially fixed on the upper surface of the mounting plate along the peripheral surface of the centering frame at intervals, the centering frame fixing seat, the transition block and the guide block are respectively in an open structure, a pin shaft I is connected between the rotating end and the centering frame fixing seat, the guide plate horizontally slides in the transition block, the moving end horizontally slides in the guide block, and a pin shaft II is connected between the front end part of the moving end and the end part of the piston rod of the centering cylinder, a rotating shaft penetrates through the front end part of the cylinder body of the centering cylinder, one end of the rotating shaft is fixedly connected with the mounting plate, the other end of the rotating shaft is fixedly connected with a cylinder body pressing plate, the cylinder body pressing plate is horizontally arranged and fixedly connected with a centering cylinder fixing seat, and the centering cylinder fixing seat is arranged on the right side of the cylinder body of the centering cylinder;

furthermore, a guide groove I matched with the guide plate is formed in the middle position, facing one side of the guide plate, of the transition block, a guide groove II matched with the moving end is formed in the middle position, facing one side of the moving end, of the guide block, a connecting groove matched with the centering frame is formed in the middle position, facing one side of the centering frame, of the centering frame fixing seat, a through hole I for the pin shaft I to pass through is formed in the rotating end, a connecting through hole for the pin shaft I to pass through is formed in the centering frame fixing seat, and a through hole II for the pin shaft II to pass through is formed in the moving end.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model is characterized in that the mounting seat, the righting cylinder, the righting frame and the guide ring are arranged into two bilaterally symmetrical parts, the left end part of the outer peripheral surface of the righting frame is hinged with the mounting seat, the position of the right side of the outer peripheral surface of the righting frame near the middle is connected with the end part of the piston rod of the righting cylinder, the front end part of the cylinder body of the righting cylinder is hinged with the mounting seat, the end connection and the middle connection are combined, the integral connection stability and the connection bearing capacity between the righting frame, the mounting seat and the righting frame are greatly improved, the safety of the righting operation process is improved, the rear end part of the cylinder body of the righting cylinder is matched with the right end part of the outer peripheral surface close to the righting frame to be movably arranged, the righting frame rotates by taking the left end part of the outer peripheral surface of the righting cylinder as the center under the driving of the piston rod of the righting cylinder, the righting cylinder can rotate by taking the front end part of the cylinder body as the center, the connection flexibility among the righting frame, the mounting seat and the righting frame is further improved, and the safety of righting operation is ensured; meanwhile, the guide rings in the utility model adopt the arrangement of a double-arc eccentric structure, and the reducing type arrangement of the guide rings relative to the action surface of the tubular column ensures that the two guide rings have excellent functions of correcting, centering and guiding the tubular column when being closed and opened, thereby greatly improving the centering effect of the tubular column and ensuring the righting stability of the tubular column;

2. the circular arc reducing surface in the utility model consists of a middle circular arc surface I and circular arc surfaces II at two ends, the circle center of the circular arc surface I and the circle center of the circular arc surface II are both positioned on the central line of the guide rings, the radius of the circular arc surface II is larger than that of the circular arc surface I, the reducing effect is realized when the two guide rings are closed and opened, the contact length between a pipe column and the guide rings is changed, and the stability of the pipe column during centering is further improved;

3. the utility model discloses well deflector horizontal sliding of righting frame is in the transition piece of mount pad, and the motion end of righting frame is in the tailpiece of the piston rod portion connection with righting the jar, and still the horizontal sliding is in the deflector of mount pad, has further guaranteed to right and has kept the horizontal steady motion throughout at rotatory in-process, has improved holistic operation security.

Drawings

Fig. 1 is an isometric view of an embodiment of the present invention;

fig. 2 is a schematic structural view of a righting frame according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a guide ring according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a straightening cylinder according to an embodiment of the present invention;

fig. 5 is a schematic view of the working principle of the embodiment of the present invention (closed state);

fig. 6 is a schematic view of the working principle of the embodiment of the present invention (open state);

in the figure: 1. mounting panel, 2, right frame fixing base, 21, the spread groove, 22, connect the through-hole, 3, the transition piece, 31, guide way I, 4, the guide block, 41, guide way II, 5, right the cylinder fixing base, 6, cylinder body clamp plate, 7, right the frame, 71, right the frame body, 72, rotation end, 73, the deflector, 74, the motion end, 75, through-hole I, 76, through-hole II, 8, the guide ring, 81, the circular arc reducing surface, 811, arc surface I, 812, arc surface II, 9, round pin axle I, 10, round pin axle II, 11, the pivot, 12, right the cylinder.

Detailed Description

The technical solution provided by the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 6, an auxiliary centering mechanism is shown, which comprises a mounting plate 1, a centering frame 7 and two guide rings 8, which are sequentially arranged from outside to inside, wherein the mounting plate 1 is in a semicircular structure and is bilaterally symmetrical, the centering frame 7 and the guide rings 8 are correspondingly arranged with the mounting plate 1 one by one, the centering frame 7 is composed of a centering frame body 71 in a semicircular structure, and rotating ends 72, guide plates 73 and moving ends 74 which are sequentially arranged along the outer peripheral surface of the centering frame body 71 at intervals, the rotating ends 72 are horizontally connected with the left end part of the outer periphery of the centering frame body 71, the guide plates 73 are horizontally connected with the left side of the outer periphery of the centering frame body 71 near the middle, the moving ends 74 are horizontally connected with the right side of the outer periphery of the centering frame body 71 near the middle, a centering frame fixing seat 2, a transition block 3, a guide block 4 and a centering cylinder fixing seat 5 are sequentially fixed on the upper surface of the mounting plate 1 at intervals, the righting frame fixing seat 2, the transition block 3 and the guide block 4 are respectively of an open structure, wherein a pin shaft I9 is connected between the righting frame fixing seat 2 and a rotating end 72, the rotating end 72 is hinged with the righting frame fixing seat 2 through the pin shaft I9, a connecting groove 21 for accommodating the rotating end 72 and a connecting through hole 22 for allowing the pin shaft I9 to pass through are formed in the righting frame fixing seat 2, a through hole I75 for allowing the pin shaft I9 to pass through is formed in the rotating end 72, a guide groove I31 for accommodating the guide plate 73 is formed in the middle of one side, facing the guide plate 73, of the transition block 3, the guide plate 73 is in horizontal sliding fit with the transition block 3 through the guide groove I31, a guide groove II 41 for accommodating the moving end 74 is formed in the middle of one side, facing the moving end 74, of the moving end 74 is in horizontal sliding fit with the guide block 4 through the guide groove II 41, a pin shaft II 10 is connected between the front end part of the moving end 74 and the end part of a piston rod of the righting cylinder 12, the moving end 74 is connected with the end part of the piston rod of the righting cylinder 12 through a pin shaft II 10, a through hole II 76 for the pin shaft II to pass through is formed in the moving end 74, a rotating shaft 11 penetrates through the front end part of the cylinder body of the righting cylinder 12, the lower end of the rotating shaft 11 is fixedly connected with the mounting plate 1, the upper end of the rotating shaft 11 is connected with a horizontally arranged cylinder body pressing plate 6 connected with a righting cylinder fixing seat 5 in a penetrating mode, the righting cylinder fixing seat 5 is arranged on the right side of the cylinder body of the righting cylinder 12, and the rear end part of the cylinder body of the righting cylinder 12 is movably arranged close to the right side end part of the outer peripheral surface of the righting frame body 71;

further, guide ring 8 is semicircle loop configuration and fixed connection at the inner peripheral surface of righting frame body 71, and the inboard of guide ring 8 is formed with circular arc reducing surface 81, and circular arc reducing surface 81 includes circular arc surface I811, and respectively an organic whole is connected with circular arc surface II 812 is equallyd divide at the both ends of circular arc surface I811, and the centre of a circle of circular arc surface II 812 and the centre of a circle of circular arc surface I811 all are in on the central line of guide ring 8, and the radius of circular arc surface I811 is less than the radius of circular arc surface II 812.

Before a power slip (not shown) is closed, a righting cylinder 12 is started, a righting frame 7 swings around a rotating end 71 under the telescopic pushing of a piston rod of the righting cylinder 12, meanwhile, the righting cylinder 12 rotates around a rotating shaft 11, finally two guide rings 8 are driven to flexibly rotate to complete the action of integral closing, and a pipe column (not shown) is guided and centered and righted quickly and accurately when the two guide rings 8 are closed through an arc-shaped reducing surface 81 of the guide rings 8; in addition, in the swinging process of the centering frame 7, the guide plate 73 is horizontally matched with the transition block 3 in a sliding manner, and the moving end 74 is horizontally matched with the guide block 4 in a sliding manner, so that the centering frame 7 always keeps horizontal movement.

Claims

1. The auxiliary centering mechanism comprises a semicircular mounting seat, a centering cylinder and a centering frame, wherein the semicircular mounting seat is bilaterally symmetrical, the centering cylinder and the centering frame are arranged in one-to-one correspondence to the mounting seat, and the auxiliary centering mechanism is characterized in that a guide ring with an inner side in a double-arc eccentric structure is fixed on the inner peripheral surface of the centering frame, the left end of the outer peripheral surface of the centering frame is hinged to the mounting seat, the right side of the outer peripheral surface of the centering frame, which is close to the middle, is connected with the end of a piston rod of the centering cylinder, the front end of a cylinder body of the centering cylinder is hinged to the mounting seat, and the rear end of the cylinder body of the centering cylinder, which is close to the right end of the outer peripheral surface of the centering frame, is movably arranged.

2. The auxiliary centering mechanism as claimed in claim 1, wherein the guide ring is of a semi-circular structure and has an arc-shaped variable diameter surface formed on the inner side thereof, the arc-shaped variable diameter surface comprises a middle arc surface I and two end arc surfaces II, the center of the arc surface I and the center of the arc surface II are both located on the central line of the guide ring, and the radius of the arc surface II is greater than that of the arc surface I.

3. The auxiliary centering mechanism as claimed in claim 2, wherein the mounting seat comprises a mounting plate having a semicircular structure, the upper surface of the mounting plate is sequentially fixed with a centering frame fixing seat, a transition block, a guide block and a centering cylinder fixing seat at intervals along the outer circumferential surface of the centering frame, and the centering frame fixing seat, the transition block and the guide block are all respectively of an open structure.

4. The auxiliary centering mechanism as claimed in claim 3, wherein the centering frame comprises a centering frame body in a semicircular annular structure, the end portion of the left side of the periphery of the centering frame body extends horizontally to form a rotating end, the left side of the periphery of the centering frame body extends horizontally to form a guide plate near the middle, and the right side of the periphery of the centering frame body extends horizontally to form a moving end near the middle.

5. An auxiliary centering mechanism as claimed in claim 4, wherein a pin shaft I is connected between the rotating end and the centering frame fixing seat, the guide plate horizontally slides in the transition block, the moving end horizontally slides in the guide block, and a pin shaft II is connected between the front end of the moving end and the end of the piston rod of the centering cylinder.

6. The auxiliary centering mechanism as claimed in claim 5, wherein a guide slot I adapted to the guide plate is formed in the middle of one side of the transition block facing the guide plate, a guide slot II adapted to the moving end is formed in the middle of one side of the guide block facing the moving end, and a connecting slot adapted to the centering frame is formed in the middle of one side of the centering frame fixing seat facing the centering frame.

7. An auxiliary centering mechanism as claimed in claim 6, wherein said rotating end is provided with a through hole I for passing the pin I, said centering frame fixing seat is provided with a connecting through hole for passing the pin I, and said moving end is provided with a through hole II for passing the pin II.

8. The auxiliary centering mechanism as claimed in claim 5, wherein a rotating shaft is inserted into the front end of the cylinder body of the centering cylinder, one end of the rotating shaft is fixedly connected to the mounting plate, the other end of the rotating shaft is fixedly connected to a cylinder pressing plate, the cylinder pressing plate is horizontally arranged and fixedly connected to a centering cylinder fixing seat, and the centering cylinder fixing seat is arranged on the right side of the cylinder body of the centering cylinder.