Novel packer release joint

Abstract

The invention discloses a novel packer release joint comprising an upper joint body, a bearing cover, a middle sleeve, an outer sleeve, a central spindle, a lower joint body, a back-inserting shear pin, a shearing pin I, an elastic clamping claw, a clamping claw sleeve and a tail sleeve; the lower end of the upper joint body is connected with the upper end of the central spindle through the middlesleeve, the upper end of the middle sleeve makes contact with the lower end of the bearing cover, the exterior of the lower end of the central spindle is sleeved with the tail sleeve, the exterior ofthe upper end of the lower joint body is sleeved with the clamping claw sleeve, the exterior of a stepped shaft of the upper joint body is sleeved with the bearing cover, and a steel ball is arrangedat the junction of the upper joint body and the bearing cover; and the exterior of the central spindle is sleeved with the elastic clamping claw, the exterior of the elastic clamping claw is sleevedwith the clamping claw sleeve, the clamping claw sleeve is connected with the central spindle through the shear pin I, the elastic clamping claw is connected with the central spindle through the back-inserting shear pin, and the exterior of the middle sleeve is sleeved with the outer sleeve. The novel packer release joint has the beneficial effects that the neutralization point does not need to befound, a release can be easily buckled reversely only by downwards pressing a certain tonnage and forwards rotating a pipe column, and the novel packer release joint can be used for a mechanical packer and a hydraulic packer.

Description

technical field [0001] The invention relates to the field of oil production equipment, in particular to a novel packer drop-off joint. Background technique [0002] In the process of oil production, the packer is a device fixed on the pipe string, and the annulus of the oil sleeve is sealed through the setting of the packer to realize stratification. [0003] According to the on-site process requirements, generally a drop joint is required on the upper part of the packer, also known as insertion seal, anchor seal, etc. , the drop-off joint is separated from the packer, and secondly, after the drop-off is successful, the tubing string needs to be replaced and reinserted. The drop-off methods are generally divided into mechanical and hydraulic types. When the mechanical operation is lost, it is often necessary to find the neutral point of the pipe string for undercutting. In some deep wells and highly deviated wells, the requirements for on-site operations are very high, espe...

AI Technical Summary

Problems solved by technology

When the mechanical operation is lost, it is often necessary to find the neutral point of the pipe string for undercutting. In some deep wells and highly deviated wells, the requirements for on-site operations are very high, especially for pipes that have been in the well for a long time, and it is difficult to lose hands ; Hydraulic throws often need to drop the ball to suppress the pressure, but the ball seat will affect the inner diameter of the pipe

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