CN214463954U

CN214463954U - Oil well pipe column coarse thread safety joint

Info

Publication number: CN214463954U
Application number: CN202120004628.4U
Authority: CN
Inventors: 刘鹏; 王书忠; 李玉飞; 罗伟
Original assignee: Sichuan Zhonghongrui Petroleum Machinery Engineering Co ltd
Current assignee: Sichuan Zhonghongrui Petroleum Machinery Engineering Co ltd
Priority date: 2021-01-04
Filing date: 2021-01-04
Publication date: 2021-10-22
Anticipated expiration: 2031-01-04

Abstract

The utility model discloses an oil well tubular column coarse thread safety joint, including the top connection, the inside threaded connection of top connection has the lower clutch, the bottom symmetry fixedly connected with fixed block of top connection, and the inside of fixed block is rotated and is connected with the pivot, the outside fixedly connected with pawl of pivot, and the outside symmetry cover of pivot has torque spring, and torque spring's one end is fixed with the pivot, and torque spring's the other end is fixed with the inside of fixed block, the beneficial effects of the utility model are that: set up screw thread and thread groove, be convenient for fixed with top connection and lower clutch, set up pawl, torque spring and sloping block, be convenient for to realizing carrying out corotation between top connection and the lower clutch, can not the reversal to make and be difficult for droing between top connection and the lower clutch, the hardness of pawl is less than the hardness of sloping block, is convenient for twist off the pawl, thereby makes top connection and lower clutch separately.

Description

Oil well pipe column coarse thread safety joint

Technical Field

The utility model relates to a safety joint technical field specifically is an oil well tubular column coarse thread safety joint.

Background

The safety joint is a joint which is connected to the lowest part of a drill rod string and used for protecting an upper drill rod when drilling a special stratum or performing special operation in geological drilling, is connected by a coarse thread and a square thread, is the link which is most easy to detach in the whole drill rod string, can detach a screw thread from the safety joint and lift all drill rods out of the ground when drilling blocking and burying accidents occur, so as to further process the accidents, is connected to a fishing tool when drilling tools in a fishing hole are fished, can be conveniently detached from the safety joint and lift the drill rods after the fishing tool is blocked, is also connected to the upper part of a stratum tester when a stratum tester is put into an oil well for middle test, is conveniently detached from the safety joint when the stratum tester is severely blocked and lifts all drill rods, the existing safety joint usually adopts a bolt mode to fix the safety joint, so that the bolt is easy to be blocked, the string is difficult to turn, making it difficult to disconnect the safety joint.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil well tubular column coarse thread safety joint to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an oil well tubular column thick thread safety joint, includes the top connection, the inside threaded connection of top connection has the lower clutch, the bottom symmetry fixedly connected with fixed block of top connection, the inside of fixed block is rotated and is connected with the pivot, the outside fixedly connected with pawl of pivot, the outside symmetry cover of pivot has torsion spring, torsion spring's one end is fixed with the pivot, torsion spring's the other end is fixed with the inside of fixed block.

Preferably, the inside of the upper joint is provided with threads, and the inside of the lower joint is provided with thread grooves matched with the threads for use.

Preferably, a sliding groove is formed in the lower connector, and the sliding groove is circular.

Preferably, the inside equidistance of spout is equipped with the sloping block that uses with the pawl cooperation.

Preferably, a sealing ring is arranged inside the upper joint.

Preferably, the pawl has a hardness less than that of the swash block.

Compared with the prior art, the beneficial effects of the utility model are that: set up screw thread and thread groove, be convenient for fixed with top connection and lower clutch, set up pawl, torque spring and sloping block, be convenient for to realizing carrying out corotation between top connection and the lower clutch, can not the reversal to make and be difficult for droing between top connection and the lower clutch, the hardness of pawl is less than the hardness of sloping block, is convenient for twist off the pawl, thereby makes top connection and lower clutch separately.

Drawings

Fig. 1 is a schematic sectional structure of the present invention;

fig. 2 is a schematic view of a cross-sectional structure of the lower joint in a top view;

FIG. 3 is a schematic side view of the fixing block according to the present invention;

FIG. 4 is an enlarged view of the point A of the present invention;

FIG. 5 is an enlarged view of the point B of the present invention;

fig. 6 is a schematic view of the main sectional structure of the fixing block of the present invention.

In the figure: 1. an upper joint; 2. a thread; 3. a lower joint; 4. a thread groove; 5. a fixed block; 6. a rotating shaft; 7. a pawl; 8. A torsion spring; 9. a chute; 10. a sloping block; 11. and (5) sealing rings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution:

the utility model provides an oil well tubular column thick thread safety joint, includes top connection 1, and the inside threaded connection of top connection 1 has lower clutch 3, and the bottom symmetry fixedly connected with fixed block 5 of top connection 1, the inside rotation of fixed block 5 are connected with pivot 6, and the outside fixedly connected with pawl 7 of pivot 6, the outside symmetry cover of pivot 6 have torsion spring 8, and torsion spring 8's one end is fixed with pivot 6, and torsion spring 8's the other end is fixed with the inside of fixed block 5.

Further, the inside of the upper joint 1 is provided with a thread 2, and the inside of the lower joint 3 is provided with a thread groove 4 matched with the thread 2.

Further, the lower connector 3 is internally provided with a chute 9, and the chute 9 is annular.

Further, the inside of the sliding groove 9 is equidistantly provided with inclined blocks 10 which are matched with the pawls 7 for use.

Further, a seal ring 11 is provided inside the upper joint 1.

Further, the hardness of the pawl 7 is less than that of the swash block 10.

Specifically, when the utility model is used, the lower joint 3 is rotated forward, the lower joint 3 is screwed into the upper joint 1, the pawl 7 contacts the sloping block 10, the pawl 7 is extruded by the sloping block 10 and moves upward to drive the rotating shaft 6 to move upward, the torsion spring 8 is compressed, after passing through the sloping block 10, the torsion spring 8 stretches to drive the rotating shaft 6 to rotate, the rotating shaft 6 drives the pawl 7 to descend, the operation is repeated, the sloping block 10 can only transmit forward, the reverse pawl 7 is supported and can not rotate until the upper joint 1 and the lower joint 3 are screwed up, when in construction, the lower tubular column connected with the lower joint 3 is clamped or blocked with the lower joint 3, when the upper tubular column connected with the upper joint 1 can not be taken out, the hardness of the pawl 7 is smaller than that of the sloping block, when rotating vigorously, the pawl 7 can break, the upper tubular column continues to rotate, so that the upper joint 1 is separated from the lower joint 3, the upper joint 1 is taken out.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an oil well tubular column coarse thread safety joint, includes top connection (1), its characterized in that, the inside threaded connection of top connection (1) has lower clutch (3), the bottom symmetry fixedly connected with fixed block (5) of top connection (1), the inside rotation of fixed block (5) is connected with pivot (6), the outside fixedly connected with pawl (7) of pivot (6), the outside symmetry cover of pivot (6) has torque spring (8), the one end and the pivot (6) of torque spring (8) are fixed, the other end of torque spring (8) is fixed with the inside of fixed block (5).

2. An oil well string coarse thread safety joint as defined in claim 1, wherein: the inner part of the upper joint (1) is provided with a thread (2), and the inner part of the lower joint (3) is provided with a thread groove (4) matched with the thread (2).

3. An oil well string coarse thread safety joint as defined in claim 1, wherein: a sliding groove (9) is formed in the lower connector (3), and the sliding groove (9) is annular.

4. An oil well string coarse thread safety joint as claimed in claim 3, wherein: the inside equidistance of spout (9) is equipped with sloping block (10) that use with pawl (7) cooperation.

5. An oil well string coarse thread safety joint as defined in claim 1, wherein: and a sealing ring (11) is arranged in the upper joint (1).

6. An oil well string coarse thread safety joint as claimed in claim 4, wherein: the hardness of the pawl (7) is smaller than that of the inclined block (10).