Automatic clutch sucker rod anti-detachment device

Abstract

The invention discloses an automatic clutch sucker rod detachment prevention device in the field of sucker rod connecting devices. The main body is provided with an axial through hole, and the lower opening of the through hole is connected with the lower joint through an internal thread. There is a connecting rod inside, and the middle part of the connecting rod is provided with a round table matching the inner diameter of the through hole. There are arc-shaped ring grooves and a number of steel balls between the round table and the inner wall of the through hole; The joint is threadedly connected, a floating body is arranged in the through hole, a guide groove is provided on the side of the floating body, and a positioning screw is provided on the body to radially insert into the guide groove; there is a set between the lower end of the floating body and the upper end of the lower joint for torque transmission and can A coupling part that is separated and combined in the axial direction; the threads on the upper end of the connecting rod are in the same direction as the threads on the upper end of the lower joint; the threads on the upper end of the connecting rod are opposite to the threads on the lower end of the connecting rod. , The accident caused by the sucker rod falling into the well.

Description

technical field [0001] The invention relates to a rod pump oil production equipment in an oil field, in particular to a sucker rod connecting device. Background technique [0002] In the prior art, there is a rotary anti-loosening sucker rod coupling, its application number: 201320727064.2; application date: 2013-11-18; publication number: CN 203570217U; publication date: 2014-04-30; the device includes The upper joint and the lower joint, the lower end of the upper joint is threadedly connected with the coupling body, and there is a stepped hole in the coupling body, the diameter of the upper end of the stepped hole is larger than the diameter of the lower end, and an intermediate rotating body is arranged in the stepped hole, and the lower end of the intermediate rotating body extends out of the ladder The outside of the hole is threaded with the lower joint, and a number of supporting steel balls are arranged between the upper end of the intermediate rotating body and the...

AI Technical Summary

Problems solved by technology

Its shortcoming is that the device cannot be used for torque transmission. In the oil field screw pump oil recovery system, the depth of the oil well reaches hundreds of meters or even thousands of meters, and the sucker rod string is connected by several sucker rods and couplings. When the screw rod is used for oil production, the surface equipment drives the sucker rod string to rotate forward and transmits torque to drive the screw pump. At this time, the forward rotation torque of the downhole sucker rod string is very large, which will make When the screw pump system fails or needs to be shut down, the positive rotational torque acting on the sucker rod string will inevitably release the energy accumulated in the sucker rod string to rotate at a high speed in the reverse direction. In this case, it is very easy The threads at the connection between the sucker rod and the coupling are tripped, and even the sucker rod is broken, leading to downhole accidents, and the oil well is forced to stop production for maintenance

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