CN211115822U

CN211115822U - Novel multifunctional connecting-tripping device

Info

Publication number: CN211115822U
Application number: CN201921920567.5U
Authority: CN
Inventors: 董世民; 董子龙; 刘雪营; 贾贺通
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-07-28
Anticipated expiration: 2029-11-08

Abstract

The utility model discloses a novel multi-functional disconnected ware belongs to a downhole tool of oil recovery system. The device comprises upper and lower joint, including the body of rod, strengthening rib, base and buckle. The body of rod of during operation upper and lower joint passes through the coupling and is connected with the post, and the lower clutch is close to screw pump end and goes into the oil well along with screw pump and oil pipe in advance down, then the upper joint follows the post and enters into oil pipe, carries out clockwise rotation after the terminal surface of upper joint buckle and the terminal surface contact of lower joint buckle, makes the buckle terminal surface and the contact of lower joint base of upper joint, again clockwise rotation 90 with the upper joint this moment, then upwards mentions the post gently and just can make two pairs of buckle cooperations bite tightly. The device is simple in structure and easy to disassemble and assemble, and simultaneously, the capacity of bearing torque and large axial force of the device is greatly improved by providing the buckle with the reinforcing ribs.

Description

Novel multifunctional connecting-tripping device

Technical Field

The utility model relates to an oil pumping system, in particular to installation and dismantlement of ground drive screw pump oil recovery system's sucker-rod string in pit.

Background

The ground driving screw pump oil production system has the advantages of simple structure, less initial equipment investment, good energy-saving effect, wide application range and the like, thereby being widely applied to oil fields at home and abroad. Compared with a pumping unit lifting system, the pump detection period of the ground driving screw pump oil extraction system is relatively short, the main reason is failure of a sucker rod string, and the breakage of the sucker rod string caused by eccentric wear of a rod pipe is a main failure mode. Sometimes the rod string needs to be separately overhauled, at which time the rod string needs to be installed and removed downhole. And some well conditions require that the disconnect be able to withstand large torque and axial forces under normal operating conditions.

SUMMERY OF THE UTILITY MODEL

In order to solve the existing problems, the utility model provides a novel multifunctional connecting-tripping device.

The utility model discloses a following technical scheme realizes:

the utility model provides a novel multi-functional uncoupling device which characterized in that: the disconnecting and connecting device comprises an upper connector A and a lower connector B, wherein the upper connector A consists of an upper rod body (4), an upper reinforcing rib (5), an upper base (10) and an upper connector buckle (6), and the upper rod body (4) of the upper connector A is connected with a sucker rod string (1) through a coupling (3); the lower joint B is composed of a lower rod body (9), a lower reinforcing rib (8), a lower base (11) and a lower joint buckle (7), the lower rod body (9) of the lower joint B is connected with the sucker rod string (1) through the coupling (3), when the sucker rod string needs to be butted in a well, the lower joint B and the sucker rod string (1) are installed close to the screw pump end and are lowered into the oil well along with the screw pump and the oil pipe (2) in advance, then the upper joint A enters the oil pipe (2) along with the sucker rod string, when the end face (adopting circular arc cutting) of the upper joint buckle (6) of the upper joint A is contacted with the end face (adopting circular arc cutting) of the lower joint buckle (7) of the lower joint B, the upper joint A rotates clockwise, the end face of the upper joint buckle (6) of the upper joint A is lowered to be contacted with the lower base (11) of the lower joint B, at the moment, the upper joint A rotates clockwise by 90 degrees, then the sucker rod string is slightly lifted upwards to enable the two pairs of buckles to form the interlocking fit with staggered positions. Meanwhile, the upper joint A and the lower joint B are symmetrically distributed around the central axes of the upper rod body (4) and the lower rod body (9), so that two pairs of buckles with the same shape and assembly relation exist after normal matching.

The bearing capacity of the upper joint buckle (6) and the lower joint buckle (7) is stronger under the reinforcing action of the upper reinforcing rib (5) and the lower reinforcing rib (8).

The utility model has the advantages that: the upper base (10) of the upper joint and the lower base (11) of the lower joint are both cut by circular arcs, so that the flow area of the produced liquid at the positions can be increased.

The upper joint buckle (6) and the lower joint buckle (7) of the upper joint of the disconnecting and connecting device are in hook-shaped and meshed connection in staggered positions, the structure is simple, the axial length is short, and the whole device is not provided with elastic elements such as springs and the like, so that the connection of the section is more stable in structure compared with other types of disconnecting and connecting devices, the integral rigidity is higher, and the vibration of a rod body is weakened. At the same time, the device can be used to transmit torque and large axial force.

Drawings

Fig. 1 shows a state of connection of the coupling/decoupling device according to the present invention in a screw pump pumping system.

Fig. 2 is a sectional view of the coupling-uncoupling device according to the present invention in a normal coupling state in a screw pump pumping system.

Fig. 3 is an axial schematic view of the disconnect assembly of the present invention.

Fig. 4 is an axial view of the upper joint a of the coupling/uncoupling device of the present invention.

Fig. 5 is an axial view of the lower joint B of the present invention.

In the figure: 1. a sucker rod string; 2. an oil pipe; 3. a coupling; 4. a rod body is arranged; 5. arranging a reinforcing rib; 6. an upper connector buckle; 7. a lower connector is buckled; 8. a lower reinforcing rib; 9. a lower rod body; 10. an upper base; 11. a lower base;

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 2, a novel multifunctional coupling-uncoupling device comprises an upper joint a and a lower joint B: the upper joint A consists of an upper rod body (4), an upper reinforcing rib (5), an upper base (10) and an upper joint buckle (6), and the upper rod body (4) of the upper joint A is connected with the sucker rod string (1) through a coupling (3); the lower joint B is also composed of a lower rod body (9), a lower reinforcing rib (8), a lower base (11) and a lower joint buckle (7), the lower rod body (9) of the lower joint B is connected with the sucker rod string (1) through the coupling (3), and meanwhile, the upper joint and the lower joint are symmetrically distributed at 180 degrees around the central axis of the upper rod body (4) or the lower rod body (9) (as shown in figure 3), so the shapes and the assembly relations of the other parts are the same as those of the upper joint and the lower joint.

The method comprises the following specific operations: for the screw pump oil pumping system which needs to regularly and separately maintain the rod piece, a disconnecting device (like the utility model) is needed to be installed on the oil pumping rod string. During specific operation, the lower joint B connected through the coupling (3) and the sucker rod string (1) at the lower part are lowered into the well together with the screw pump (generally, the disconnecting device is relatively close to the screw pump), and the upper joint A and the upper sucker rod string connected through the coupling (3) are slowly lowered into the well along with the whole sucker rod string and are ready to be butted with the lower joint B of the disconnecting device. When the upper joint A is butted (as shown in figure 3), the end face of the upper joint buckle (6) of the upper joint A is downwards contacted with the end face of the lower joint buckle (7) of the underground joint B and the lower joint B, and then clockwise rotation is carried out, when the upper joint buckle (6) is rotated to be vertical to the position shown in the figure, the end face of the upper joint buckle just can continuously descend to the position overlapped with the end face of the lower base (11) of the lower joint B, then the upper joint A is rotated by 90 degrees clockwise, and finally the upper sucker rod string is slightly lifted upwards so that the two pairs of buckles can be engaged in a snap fit mode. When the upper sucker rod string needs to be taken out, the sucker rod string is slowly lowered at a well mouth, and when the end surface of the upper connector buckle (6) of the upper connector A is superposed with the end surface of the lower base (11) of the lower connector B, the sucker rod string is rotated 90 degrees anticlockwise and then is slowly lifted upwards, so that the upper sucker rod string of the disjointing device can be separated from the lower sucker rod string of the disjointing device.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a novel multi-functional uncoupling device which characterized in that: the disconnecting and connecting device comprises an upper connector (A) and a lower connector (B), wherein the upper connector (A) consists of an upper rod body (4), an upper reinforcing rib (5), an upper base (10) and an upper connector buckle (6), and the upper rod body (4) of the upper connector (A) is connected with a sucker rod string (1) through a coupling (3); the lower joint is also composed of a lower rod body (9), a lower reinforcing rib (8), a lower base (11) and a lower joint buckle (7), the lower rod body (9) of the lower joint is connected with the sucker rod string (1) through a coupling (3), when the sucker rod string needs to be butted in a well, the lower joint and the sucker rod string (1) are installed close to the end of a screw pump and are put into an oil well along with the screw pump and an oil pipe (2) in advance, then the upper joint enters the oil pipe (2) along with the sucker rod string, when the end surface of the upper joint buckle (6) of the upper joint is contacted with the end surface of the lower joint buckle (7), the upper joint buckle (6) of the upper joint is rotated clockwise to be contacted with the lower base (11), at the moment, the upper joint (A) is rotated 90 degrees clockwise, then the sucker rod string is lifted slightly upwards, so that two pairs of buckles can form the interlocking fit, when the upper sucker rod string needs to be taken out, the sucker rod string is slowly lowered at the wellhead, when the end surface of the upper connector buckle (6) of the upper connector (A) is superposed with the end surface of the lower base (11) of the lower connector (B), the sucker rod string is rotated by 90 degrees anticlockwise, and then the sucker rod string is slowly lifted upwards, so that the upper sucker rod string of the disjointing device can be separated from the lower sucker rod string of the disjointing device; meanwhile, the upper joint and the lower joint are symmetrically distributed at 180 degrees around the central axes of the upper rod body (4) and the lower rod body (9), so that two pairs of buckles with the same shape and assembly relation exist after normal matching.

2. The novel multifunctional disconnector according to claim 1, wherein: the bearing capacity of the upper joint buckle (6) and the lower joint buckle (7) is stronger through the strengthening action of the upper reinforcing rib (5) and the lower reinforcing rib (8).

3. The novel multifunctional disconnector according to claim 1, wherein: the upper base (10) of the upper joint buckle and the lower base (11) of the lower joint buckle are both cut by arcs, so that the flow area of the produced liquid at the positions can be increased.

4. The novel multifunctional disconnector according to claim 1, wherein: the upper joint buckle (6) and the lower joint buckle (7) of the disconnecting and connecting device are in hook-shaped and in staggered snap fit.