Full-bore pressure transmission ball seat capable of being sheared

Abstract

The invention discloses a ball seat capable of achieving full-bore pressure transmission after shearing. The ball seat comprises an upper connector, a ball seat outer sleeve, a first sealing ring, a sectioning ball seat, a second sealing ring, a fixing screw, an elastic piece, a ball seat outer cylinder, a shearing pin, a shearing mandrel, a third sealing ring, a fourth sealing ring, a fifth sealing ring and a lower connector. The pressure transmission ball seat is connected to a setting and releasing tool assembly of a sand prevention service pipe column, a pressure transmission hole is opened through ball injection pressurization, the interior of the pipe column is full-bore after the ball seat is sheared, and smooth passing of a follow-up setting ball is guaranteed; the bearing parts of the sectioning ball seats are rigid parts, so that the ball seats are stressed more reasonably, the sectioning ball seats are not connected with the shearing mandrel, and the sectioning ball seats can be smoothly separated by adopting the elastic sheets to restore and expand; a sealing ring is installed on the lower portion of the shearing mandrel, the outer wall of the shearing mandrel is prevented from being eroded by liquid flow after shearing, and the number of times of repeated use is increased.

Description

technical field [0001] The invention belongs to the technical field of oilfield development and production, and in particular relates to a full-diameter pressure-transmitting ball seat capable of shearing. Background technique [0002] Because hydraulically driven downhole tools have the advantages of wide adaptability to well types, reliable operation, and convenient operation, they are widely used in oil and gas well completion operations, especially in open hole gravel-packed sand control completion operations. The pipe string is generally divided into inner layers The service pipe string and the outer sand control pipe string have a two-layer structure. The two are connected to the service pipe string through the setting and release tool assembly at the wellhead to become one and run in. Only after the pipe string is run in place can the pipe string be added. High pressure, through hydraulic drive to complete the operations such as packer setting, inner service string an...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the technical problem of insufficient reliability of the setting and release tool assembly pressure transmission ball seat of the service tool in the sand control of well completion in the prior art, and provide a full-bore pressure transmission that can be sheared Ball seat, to achieve accurate cutting of the ball seat, to meet the requirements of repeated use

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