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Self-grouting and changeable floating collar and floating shoe device

A self-grouting and variable technology, which is used in wellbore/well valve devices, wellbore/well components, earth-moving drilling and mining, etc., can solve the problem that floating hoop and floating shoes do not have self-grouting effect.

Pending Publication Date: 2019-07-23
常熟市石油固井工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main technical problem to be solved by the present invention is to provide a safer and more reliable self-grouting variable floating shoe device, which can reduce the difficulty of operation and improve work efficiency , cost saving, clean environment, safe production

Method used

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  • Self-grouting and changeable floating collar and floating shoe device
  • Self-grouting and changeable floating collar and floating shoe device

Examples

Experimental program
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Effect test

Embodiment

[0012] A self-grouting variable floating hoop floating shoe device, including a shell 1, a valve seat 2, a back pressure valve 3, a support sleeve 4, an orifice plate 5, a pressure sleeve 6, a copper ball 7, a spring 8, and a base 9; The housing 1 is cylindrical; the valve seat 2 is arranged in the middle and upper part of the housing 1; the middle part of the valve seat 2 is provided with a through hole; the support sleeve 4 is arranged on the inner wall of the middle part of the housing 1, and is located Below the seat 2; the orifice 5 is arranged below the support sleeve 4; the middle part of the orifice 5 is a cylindrical sleeve structure, and the orifice 5 on both sides of the cylindrical sleeve structure in the middle of the orifice 5 is provided with an orifice through hole. hole; the pressure sleeve 6 is arranged below the orifice plate 5, and the middle part of the pressure sleeve 6 is provided with a pressure sleeve through hole, and the cylindrical sleeve-like struct...

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Abstract

The invention discloses a self-grouting and changeable floating collar and floating shoe device. The floating collar and floating shoe device includes a housing body, a valve base, a back-pressure valve, a stiffener, an orifice plate, a pressing sleeve, copper balls, springs, and a base. According to the self-grouting and changeable floating collar and floating shoe device, during casing running operation, the internal part of a casing communicates in a ring mode, grouting by workers at a wellhead is not needed any more, and grout enters the casing through the bottom of the casing to achieve abalance of internal and external pressure. When cyclic scour operation is conducted, after the grout enters the self-grouting and changeable floating collar and floating shoe device, the grout is continuously increased, pressure is continuously increased, and the pressure finally acts on the pressing sleeve, so that the pressing sleeve is moved, the copper balls roll out of ball holes, so the back-pressure valve moves up to plug through holes of the valve base.

Description

technical field [0001] The invention belongs to the technical field of well cementing equipment, and in particular relates to a self-grouting variable floating hoop floating shoe device. Background technique [0002] The floating hoop shoe is an essential tool in cementing operations. The quality of the floating hoop shoe directly affects the cementing quality. At present, the valves installed in the conventional cementing hoop shoes are mostly one-way valves, which generally have no self-filling effect. Therefore, providing a method that can realize automatic grouting during operation can improve work efficiency and is safer and more reliable. , New product technology with simple operation. After the casing is lowered to the set position, when the circular flushing operation is performed, the mud pushes the pressure sleeve to make the copper ball roll out. After the flushing operation is completed, the back pressure valve automatically hits the valve seat to close the au...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/14E21B34/06
CPCE21B33/14E21B34/06
Inventor 马胜利顾瀛居建江张晖
Owner 常熟市石油固井工具有限公司
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