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Inclined shaft section sucker rod universal joint type connecting device in ground driven oil recovery screw pump well

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

Inactive Publication Date: 2015-03-04
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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  • Inclined shaft section sucker rod universal joint type connecting device in ground driven oil recovery screw pump well
  • Inclined shaft section sucker rod universal joint type connecting device in ground driven oil recovery screw pump well
  • Inclined shaft section sucker rod universal joint type connecting device in ground driven oil recovery 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 an inclined shaft section sucker rod universal joint type connecting device in a ground driven oil recovery screw pump well. The device mainly comprises a universal joint, flexible shafts, spherical surface pressing caps, steel balls, pressure bearing ball seats, filter screens, filter screen plugs and female buckle joints, wherein the pressure bearing ball seats are symmetrically mounted at the two ends of the universal joint; one ends of the flexible shafts are connected with the female buckle joints through threads, and the other ends are connected with the pressure bearing ball seats and the spherical surface pressing caps through spherical surfaces; the spherical surface pressing caps are fixed on the universal joint through threads; and the spherical surfaces at the ends of the flexible shafts are axially fixed in the universal joint through the pressure bearing spherical surfaces and the spherical surface pressing caps.

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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IPC IPC(8): E21B17/02
CPCE21B17/04E21B17/042
Inventor 李增亮禹超盛文慧吴海燕侯华敬田文羽
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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