CN217897823U

CN217897823U - Oil well plug fast-assembling structure

Info

Publication number: CN217897823U
Application number: CN202120522011.1U
Authority: CN
Inventors: 刘明; 段风海; 梁晓阳; 王信鹏; 白园园; 李振; 王超; 闫盛宇; 段春莲
Original assignee: Shelfoil Petroleum Equipment & Services Co ltd; China Petroleum and Chemical Corp; Sinopec Research Institute of Petroleum Engineering
Current assignee: Shelfoil Petroleum Equipment & Services Co ltd; China Petroleum and Chemical Corp; Sinopec Research Institute of Petroleum Engineering
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2022-11-25
Anticipated expiration: 2031-03-12

Abstract

The utility model provides an oil well plug fast-assembling structure, including connecting the tubulose joint on the drilling string, the free end that connects is formed into and connects public head to and pipy plug nipple joint, the upper end of plug nipple joint is formed into and connects female head. Wherein, be provided with a plurality of first bosss and second boss on the outer wall of joint free end and the inner wall of plug nipple joint upper end respectively uniformly, have first clearance and second clearance respectively between two adjacent first bosss and second boss circumference and axial, the size in first clearance and second clearance is greater than the size of first boss and second boss. The first boss can stretch into the rubber plug short section along a first gap between the second bosses and enters a second gap of the second boss through rotation, so that the first boss and the second boss are clamped.

Description

Oil well plug fast-assembling structure

Technical Field

The utility model relates to an oil field exploitation field, concretely relates to oil well plug fast-assembling structure.

Background

In the process of oil exploitation, the well cementation operation of an oil well is an indispensable operation. Cementing is the process of running a casing of a certain size into a drilled wellbore and injecting cement into the annular space between the casing and the wellbore wall or between the casing and the casing. In the well cementation process, the cement and the underground slurry are separated by using the well cementation rubber plug, so that the injected cement is prevented from being polluted.

The existing well cementation rubber plug consists of an upper rubber plug and a lower rubber plug. In the well cementation construction process, the whole well cementation rubber plug is connected to a drilling tool through a joint and is released through an upper drill rod rubber plug and a lower drill rod rubber plug. The connection between the conventional well cementation rubber plug and the joint adopts a straight thread mode at present. When the well cementation rubber plug is connected, a well wellhead worker is required to use pipe tongs or chain tongs to connect the whole well cementation rubber plug to a drilling tool through multi-circle rotation, the operation mode increases the labor workload of the well wellhead worker, and the operation is inconvenient. Meanwhile, the risk that the well cementation rubber plug is damaged on the drill floor is increased.

SUMMERY OF THE UTILITY MODEL

To the technical problem as above, the utility model aims at providing an oil well plug fast-assembling structure. The utility model discloses an oil well plug fast-assembling structure can realize the high-speed joint between well cementation plug and the drilling string to saved the manpower, can prevent the damage of well cementation plug in the installation simultaneously.

According to the utility model discloses, a with oil well plug fast-assembling structure is provided, include: the plug comprises a tubular joint connected to a drill string, a free end of the joint being formed as a connecting male, and a tubular plug nipple, an upper end of which being formed as a connecting female.

The rubber plug short joint comprises a joint body, a rubber plug short section and a plurality of first bosses and second bosses, wherein the outer wall of the free end of the joint body and the inner wall of the upper end of the rubber plug short section are uniformly and respectively provided with the first bosses and the second bosses, a first gap and a second gap are respectively formed between the circumferential direction and the axial direction of each two adjacent first bosses and second bosses, and the sizes of the first gaps and the second gaps are larger than those of the first bosses and the second bosses. The first boss can stretch into along the first clearance between the second boss the plug nipple joint to through rotatory entering in the second clearance of second boss, make first boss and second boss form the block.

In a preferred embodiment, six rows of first bosses and second bosses are arranged, and the first bosses and the second bosses are uniformly arranged on the outer wall of the free end of the joint and the inner wall of the upper end of the rubber plug short joint along the circumferential direction respectively.

In a preferred embodiment, the first and second bosses are configured in a shuttle shape having an axially central portion with a width greater than a width of the ends.

In a preferred embodiment, a first groove and a second groove are provided on the outer wall of the nipple and plug sub, the first groove and the second groove being configured to communicate when a snap fit is formed between the first boss and the second boss.

In a preferred embodiment, the slider is capable of being simultaneously located in the first and second grooves by sliding when the first and second grooves are in communication.

In a preferred embodiment, the first recess, the second recess and the slider are all configured as trapezoids.

In a preferred embodiment, a screw mounting hole is further provided on the slider.

In a preferred embodiment, the respective top corners of the slider are rounded.

In a preferred embodiment, an upper surface of the slider opposite to the first groove and a lower surface adjacent to the first groove are configured as convex arc surfaces.

In a preferred embodiment, a push block is further provided on the upper surface of the slider.

Drawings

The present invention will be described with reference to the accompanying drawings.

Fig. 1 shows a schematic diagram of an oil well plug quick-assembly structure according to an embodiment of the present invention.

Fig. 2 is a schematic view of the joint of the quick assembly structure of the oil well plug shown in fig. 1.

Fig. 3 is a schematic diagram of the rubber plug short section of the oil well rubber plug fast-assembling structure shown in fig. 1.

Fig. 4 is a schematic view of a slide block of the oil well plug quick-assembly structure shown in fig. 1.

In the present application, the drawings are schematic, merely illustrative of the principles of the invention, and are not drawn to scale.

Detailed Description

Fig. 1 shows an oil well plug quick-assembly structure 100 according to an embodiment of the present invention. As shown in fig. 1, the well plug quick-assembly structure 100 includes a tubular coupling 10. The fixed end 12 of the connector 10 is connected to a drill string (not shown) of an oil well and the free end 14 thereof is formed as a connecting male head 18.

As shown in fig. 1, the well plug quick-assembly structure 100 further comprises a tubular plug nipple 20. The upper end 24 of the rubber plug nipple 20 is formed into a female connection head 28 for mating connection with the male connection head 18. Meanwhile, a fixing end 22 of the rubber plug short section 20 is also connected with a well cementation rubber plug (not shown), and the well cementation rubber plug and the rubber plug short section 20 can be connected in a welding or integral forging mode, so that the well cementation rubber plug is fixedly connected to the rubber plug short section 20.

Meanwhile, a first groove 15 and a second groove 25 are respectively arranged on the outer walls of the joint 10 and the rubber plug nipple 20. The first groove 15 and the second groove 25 are respectively arranged at one side of the joint 10 and the rubber plug sub 20 close to the connecting male head 18 and the connecting female head 28, so that when the joint 10 and the rubber plug sub 20 are connected together, the first groove 15 and the second groove 25 can be communicated with each other.

A slider 30 is arranged inside said first groove 15, said slider 30 being able to slide inside said first groove 15. Thus, when the first groove 15 and the second groove 25 can communicate with each other, the slider 30 slides along the first groove 15 to the second groove 25 so that the slider 30 is simultaneously located in the first groove 15 and the second groove 25.

In a preferred embodiment, a push block 38 is further provided on the upper surface 34 of the slider 30 opposite to the first groove 15. The push block 38 is configured as a projection of the upper surface 34. Therefore, the worker can more conveniently apply the pushing force through the pushing block 38 to slide the sliding block 30.

As shown in fig. 1, a screw mounting hole 35 is further provided on the slider 30, and the screw mounting hole 35 is used for mounting a fastening screw (not shown). It will be readily appreciated that the slider 30 can be secured within the first or

second recess

15, 25 by tightening a fastening screw within the screw receiving hole 35 such that the fastening screw abuts against an outer wall of the sub 10 or plug sub 20. And when the both ends of slider 30 were located first recess 15 and second recess 25 respectively, through fixed slider 30, can fix joint 10 and plug nipple 20 prevent to connect 10 internal rotation in plug nipple 20.

Fig. 2 is a schematic view of the coupling 10 of the well plug quick-fit structure 100 shown in fig. 1. As shown in fig. 2, a plurality of first bosses 40 are uniformly provided on the outer wall of the connection male 18. A first gap 42 and a second gap 44 are respectively arranged between two adjacent first bosses 40 in the axial direction and the circumferential direction.

Fig. 3 is a schematic view of the plug sub 20 of the oil well plug quick-assembly structure 100 shown in fig. 1. As shown in fig. 3, a plurality of second bosses 50 are also uniformly provided on the outer wall of the female coupling head 28. The first gap 42 and the second gap 44 are also respectively arranged between two adjacent second bosses 50 in the axial direction and the circumferential direction.

Essentially, the first gap 42 and the second gap 44 are sized slightly larger than the first boss 40 and the second boss 50. Thus, during the connection of the plug sub 10 and plug sub 20, the first boss 40 and the second boss 50 are able to move axially within the second gap 44, whereby the plug sub 10 can be inserted directly into the plug sub 20. Meanwhile, the first boss 40 and the second boss 50 can rotate in the circumferential direction and enter the first gap 42, so that the joint 10 is inserted into the rubber plug short section 20, and then the joint 10 can rotate to enable the first boss 40 to enter the first gap 42 on the inner wall of the rubber plug short section 20. Thereby, the first bosses 40 and the second bosses 50 are staggered in the axial direction, and a clamping connection is formed between the first bosses and the second bosses.

In a preferred embodiment, a plurality of rows of the first bosses 40 and the second bosses 50 are provided on the joint 10 and the plug sub 20, respectively. The utility model discloses in, first boss 40 and second boss 50 set up to six rows, and it is arranged respectively evenly along circumference on the outer wall that connects 10 free ends 14 and the inner wall of plug nipple joint 20 upper end 24. Therefore, after the joint 10 is inserted into the rubber plug nipple 20, the first boss 40 and the second boss 50 can be clamped by only rotating the joint 10 by 30 degrees in any direction.

In a preferred embodiment, the first boss 40 and the second boss 50 are configured to be tapered. Specifically, the first boss 40 and the second boss 50 have a smaller width at both axial ends and a larger width at the middle. Through the arrangement, the first boss 40 and the second boss 50 can be rotated into the first gap 42 more conveniently and more conveniently in a labor-saving manner, so that the first boss 40 and the second boss 50 are clamped.

Fig. 4 is a schematic view of the slide block 30 of the well plug quick-assembly structure 100 shown in fig. 1. In a preferred embodiment, each top corner 32 of the slider 30 is configured as a rounded corner, such that the top corner 32 has a curvature, as shown in fig. 4. Meanwhile, both the upper surface 34 of the slider 30 and the lower surface 36 adjacent to the first groove 15 are configured as convex arc surfaces. By this arrangement, the resistance to sliding of the slider 30 can be effectively reduced, and sliding of the slider 30 in the first groove 15 and the second groove 25 can be facilitated.

In a preferred embodiment, the first recess 15, the second recess 25 and the slide 30 are each trapezoidal in configuration. Specifically, the size of the upper surface 34 of the slider is smaller than that of the lower surface 36, and the size of the end of the first groove 15 and the second groove 25 close to the upper surface 34 is smaller than that of the end close to the lower surface 36. By this arrangement, the slider 30 can be effectively fixed, and the slider 30 is prevented from coming out of the first recess 15 or the second recess 25.

The working process of the oil well plug quick-assembly structure 100 according to the present invention is briefly described as follows.

The utility model discloses an oil well plug fast-assembling structure 100 is used for connecting the plug fast on the drilling string (not shown) of oil well. When connecting, the sub 10 is first connected to the drill string of the well and then the upper end 24 of the plug sub 20 is connected to the free end 14 of the sub 10. I.e. the free end 14 of the sub 10 is inserted into the plug sub 20. And then the rubber plug end section is rotated 30 degrees in any direction, so that the first boss 40 and the second boss 50 are clamped. The joint 10 and the plug sub 20 are axially fixed at this time.

After the joint 10 and the rubber plug nipple 20 complete axial fixation, the sliding block 30 can be pushed until the two ends of the sliding block 30 are respectively located in the first groove 15 and the second groove 25. Then, a fastening screw is attached through the screw attachment hole 35 to fix the slider 30. After the sliding block 30 is fixed, the joint 10 can no longer rotate relative to the plug sub 20. And the whole rubber plug is mounted.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and should not be construed as limiting the present invention in any way. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil well plug quick-assembly structure (100), comprising:

a tubular joint (10) to be connected to a drill string, the free end (14) of the joint being formed as a connecting male (18), and

a tubular rubber plug short section (20), the upper end (24) of the rubber plug short section is formed into a connecting female head (28),

wherein, a plurality of first bosses (40) and second bosses (50) are uniformly and respectively arranged on the outer wall of the free end of the joint and the inner wall of the upper end of the rubber plug short section, a first gap (42) and a second gap (44) are respectively arranged between the two adjacent first bosses and the adjacent second bosses in the circumferential direction and the axial direction, and the sizes of the first gap and the second gap are larger than the sizes of the first bosses and the second bosses,

the first boss can stretch into along the first clearance between the second boss the plug nipple joint to through rotatory entering in the second clearance of second boss, make first boss and second boss form the block.

2. The oil well plug quick-assembly structure (100) according to claim 1, wherein six rows of first bosses and six rows of second bosses are provided, and each row of the first bosses and the second bosses are respectively and uniformly arranged on the outer wall of the free end of the joint and the inner wall of the upper end of the plug nipple along the circumferential direction.

3. The well plug quick-assembly structure (100) according to claim 2, wherein the first and second projections are configured as a shuttle having an axial middle portion with a width greater than a width of the two ends.

4. The oil well plug quick-fit structure (100) according to any one of claims 1-3, wherein a first groove (15) and a second groove (25) are provided on the outer wall of the nipple and plug sub, said first and second grooves being configured to communicate when a snap fit is formed between the first and second bosses.

5. Oil well plug quick-fit structure (100) according to claim 4, characterized in that a slider (30) is provided in said first groove, said slider being able to slide while being in communication with said first and second grooves, while being in said first and second grooves.

6. The well plug quick-fit arrangement (100) according to claim 5, wherein the first groove, the second groove and the slider are all configured as trapezoids.

7. The oil well plug quick-assembly structure (100) according to claim 5, wherein screw mounting holes (35) are further provided on the sliding blocks.

8. The well plug quick-install structure (100) according to claim 5, wherein each top corner (32) of the slider is configured as a rounded corner.

9. The oil well plug quick-fit structure (100) as claimed in claim 5, wherein an upper surface (34) of the slider opposite the first groove and a lower surface (36) adjacent the first groove are configured as convexly curved surfaces.

10. The oil well plug quick-assembly structure (100) according to claim 8, further comprising a push block (38) disposed on an upper surface of the slide block.