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Casing lowering tools and methods

A tool and casing technology, which is applied in the field of casing lowering tools, can solve problems such as difficulty in lowering casing, achieve the effects of simple structure, improved utilization rate, and solution of necking

Active Publication Date: 2017-01-04
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a casing running tool and method to solve the defect in the prior art that the casing running is difficult due to borehole sand bridge and necking problems.

Method used

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  • Casing lowering tools and methods
  • Casing lowering tools and methods

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Embodiment Construction

[0029] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0030] Such as figure 1 As shown, the present invention provides a casing running tool, including an impeller mechanism rotated by circulating fluid, and a casing shoe 2 with a cutting edge connected to the impeller mechanism. The casing shoe 2 rotates under the drive of the impeller mechanism, Wherein, the impeller mechanism includes the impeller 12 and the liquid inlet hole 112 positioned at the side of the impeller 12, the liquid inlet hole 112 communicates with the impeller 12, that is, the liquid inlet hole 112 is located on the outside of the impeller 12, and the liquid inlet hole 112 is connected to the upper side of the impeller 12. The space between two adjacent impeller blades is connected. When circulating the fluid, t...

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Abstract

The invention provides a casing running tool and method. The casing running tool includes an impeller mechanism rotated by a circulating fluid, and a casing shoe with a cutting edge connected to the impeller mechanism. The impeller mechanism includes an impeller and a The liquid inlet hole is connected with the impeller. When lowering the casing, after connecting the upper joint with the casing, lower the casing and the casing lowering tool. When the lowering of the casing is blocked, lower the tool to the casing. Circulating fluid, the fluid enters the inner cavity of the impeller sleeve from the liquid inlet hole, and then impacts the impeller blades of the impeller from the side, and pushes the impeller to rotate, and then drives the casing shoe to rotate until it is unblocked. The casing running tool of the present invention can effectively solve the difficult problem of casing running caused by borehole sand bridges and necking, and has high fluid energy utilization rate, simple structure, simple operation and low cost.

Description

technical field [0001] The invention relates to the field of oil and gas drilling, in particular to a casing running tool and method for running a casing into a complex wellbore, which can effectively solve the difficulty in running the casing due to sand bridges and necking problems in the wellbore. Background technique [0002] The necking and sand bridge problems of complex boreholes have seriously affected the lowering of the casing. After the conventional drilling, there are still problems with the lowering of the casing. , On the one hand, this greatly increases the operation risk and cost, on the other hand, theoretically speaking, the casing is not allowed to be repeatedly screwed on and off. [0003] Although the existing casing lowering tools can solve the sand bridge problem encountered when the pipe string is lowered to a certain extent, they still have problems such as low efficiency, no reaming function, and inability to solve the necking problem. Contents of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/00E21B23/10E21B7/20
Inventor 韩飞王力李雪辉任荣权王宏伟郑万江阳文发纪友哲郭慧娟耿莉朱英杰杨磊范应璞于永亮张士彬刘洋
Owner BC P INC CHINA NAT PETROLEUM CORP
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