Full-bore pressure transmission ball seat capable of being sheared

A full-bore, ball-seat technology, which is applied in wellbore/well components, earthwork drilling, sealing/package, etc., can solve problems such as insufficient reliability, achieve convenient operation, prevent liquid flow erosion, and increase reliability. The effect of the number of repetitions

Active Publication Date: 2022-04-12
CNOOC ENERGY TECH & SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Full-bore pressure transmission ball seat capable of being sheared
  • Full-bore pressure transmission ball seat capable of being sheared
  • Full-bore pressure transmission ball seat capable of being sheared

Examples

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Effect test

Embodiment

[0032] Such as figure 1 As shown, this embodiment provides a shearable rear full-bore pressure transmission ball seat, including an upper joint 1, a ball seat cover 2, a first sealing ring 3, a split ball seat 4, a second sealing ring 5, Fixing screw 6, shrapnel 7, ball seat outer cylinder 8, shear pin 9, shear mandrel 10, third sealing ring 11, fourth sealing ring 12, fifth sealing ring 13, lower joint 14; the ball seat device Connected in the completion service pipe string, the full diameter of the pipe string can be realized after the pressure transmission ball seat is sheared.

[0033] The upper inner surface of the upper joint 1 has threads for connecting with other pipe strings, and the lower outer surface is threadedly connected with the ball seat cover 2, and the seal is realized through the first sealing ring 3; the lower outer surface of the ball seat cover 2 is connected with the setting and hand-off tool assembly The inner surface of the lower part is threadedly c...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/06
Inventor 张斌包陈义李宏伟吴尚林吴雪涛李宝龙齐海涛段威
Owner CNOOC ENERGY TECH & SERVICES
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