Object falling prevention device of shaft

A technology for preventing falling objects and wellbore, which is applied in drilling equipment, wellbore/well components, earth-moving drilling, etc., can solve the problem of downhole tools falling into the horizontal section, etc., so as to avoid downhole accidents, improve application value, and control costs. Effect

Inactive Publication Date: 2014-07-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of tubing and various downhole tools falling into the horizontal section in the prior art, the embodiment of the present invention provides a wellbore anti-falling object device

Method used

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  • Object falling prevention device of shaft

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Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0016] Such as figure 1 As shown, a wellbore anti-falling object device is arranged in the casing in the wellbore, and the wellbore anti-falling object device includes: a hand-off joint 1, a short pipe joint 2, at least one set of sealant rubber cylinders 4 and clamping Sleeve 5, the drop-off joint 1, the short pipe joint 2, the at least one set of sealing rubber cartridges 4 and the slips 5 are sequentially connected from top to bottom. Connected to the joint 1, the lowering tool lowers the wellbore falling object prevention device downhole, and the at least one set of sealant rubber cylinder 4 and the slips 5 are all anchored to the casing by pressing, and the The hands-free joint 1 is separated from the short pipe joint 2 .

[001...

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Abstract

The invention discloses an object falling prevention device of a shaft. The object falling prevention device is arranged in a sleeve pipe in the shaft and comprises a back off sub, a short pipe joint, at least one set of sealing rubber barrel and slips. The back off sub, the short pipe joint, the at least one set of sealing rubber barrel and the slips are sequentially connected from top to bottom, in work, a putting-down tool is connected with the back off sub and is used for putting the object falling prevention device of the shaft into a well, the at least one set of sealing rubber barrel and the slips are fixed with the sleeve pipe in an anchoring mode through hitting and pressing, and the back off sub and the short pipe joint are separated. According to the object falling prevention device of the shaft, the slips and the sealing rubber barrel are fixed with the sleeve pipe in the anchoring mode, the object falling prevention device and the sleeve pipe are firmly fixed together, the object falling prevention device can bear large impact force, oil pipes and various underground tools which fall from the upper portion are prevented from falling into an underground horizontal section, underground accidents are avoided, production operation cost is controlled, and the object falling prevention device is simple in structure and convenient to operate.

Description

technical field [0001] The invention relates to the field of oil exploitation, in particular to a wellbore anti-falling object device. Background technique [0002] With the continuous development of oilfields, the use of horizontal wells to efficiently develop thin oil layers has gradually been widely used. In the production process of oilfields, tubing breaks and various downhole tools in Such downhole tools fall into the horizontal section of the downhole, or even fall to the bottom of the artificial well, which will inevitably cause downhole accidents, and the process of salvaging the fallen tubing and downhole tools is complicated and difficult, which delays the production process and increases operating costs. The development effect of horizontal wells is greatly affected. [0003] At present, the length of the horizontal section of a horizontal well is generally 200-1000m. Preventing some tubing and various downhole tools from falling into the horizontal section and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/127E21B17/00E21B19/10
Inventor 常彦荣陆梅令永刚王尚卫唐凡罗聪英程颢冯建设姬振宁苑慧莹周杨帆姚洋
Owner PETROCHINA CO LTD
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