Universal joint connection device for sucker rod in inclined well section of surface-driven oil production screw pump well

A connecting device and universal joint technology, which is applied in the direction of drill pipe, drilling equipment, earthwork drilling and mining, etc., can solve the problems of not being able to bear tension but only being able to bear pressure

Inactive Publication Date: 2017-09-15
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a sucker rod universal joint type connecting device in the inclined well section of the surface-driven oil production screw pump well that can transmit torque and withstand axial tension or pressure. The deflection shaft is axially fixed in the universal joint joint through the end spherical pressure cap and the pressure bearing ball seat to solve the problem that the ball contact universal joint can only bear pressure but not tension while transmitting torque problems, to make up for the deficiencies in the existing technology

Method used

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  • Universal joint connection device for sucker rod in inclined well section of surface-driven oil production screw pump well
  • Universal joint connection device for sucker rod in inclined well section of surface-driven oil production screw pump well
  • Universal joint connection device for sucker rod in inclined well section of surface-driven oil production screw pump well

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0016] The present invention as figure 1 , figure 2 , image 3 , Figure 4 As shown, the two ends of the universal joint 2 are equipped with pressure bearing ball seats 6, the end of the deflection shaft 8 is connected with the box joint 1 through threads, and the spherical surface of the other end is passed through the pressure bearing ball seat 6 and the spherical pressure cap 7 axis. fixed on the universal joint 2, the steel ball 3 is installed in the semicircular arc groove on the inner circular surface of the end of the universal joint 2 and the ball socket on the spherical surface at the end of the deflection shaft 8, the steel ball 3 can be Axial movement in the semi-arc groove on the inner circular surface of the end of the joint joint 2, the deflecting shaft 8 transmits torque through the steel ball 3, and at the same time the deflecting...

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Abstract

The invention relates to a universal joint type connection device in the inclined well section of a ground-driven oil production screw pump well, and its structure mainly includes: a universal joint joint, a flexible shaft, a spherical pressure cap, a steel ball, a pressure bearing ball seat, a filter screen, The filter screen plug and the box joint; the two ends of the universal joint are symmetrically installed with the pressure bearing ball seat; one end of the flexible shaft is connected with the box joint through a thread, and the other end is connected with the pressure bearing ball seat and the bearing ball seat through a spherical surface. The spherical pressure cap is connected to each other, and the spherical pressure cap is fixed on the universal joint joint by threads; the spherical surface of the end of the flexible shaft is axially fixed inside the universal joint joint through the pressure bearing spherical surface and the spherical pressure cap .

Description

technical field [0001] The invention relates to a downhole tool for oil production, in particular to a sucker rod universal joint connection device in the inclined well section of a surface-driven oil production screw pump well. technical background [0002] At present, in oil fields, surface-driven oil production screw pumps are widely used in vertical wells, but less used in horizontal wells and inclined wells, mainly because there is a lack of universal joint connection devices for inclined well sections in surface-driven oil production screw pump wells. The sucker rod universal joint connection device in the inclined well section of the ground-driven oil production screw pump well connects two sucker rods at a certain angle to each other, and transmits the torque provided by the upper sucker rod to the lower sucker rod, and at the same time, the lower sucker rod The pulling force borne by the rod along the direction of the rod body is transmitted to the upper sucker rod....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/02
CPCE21B17/04E21B17/042
Inventor 李增亮孙召成李超张琦盛文慧侯华敬
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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