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An easy-to-drill bridge plug for open-hole wells

An open-hole well and bridge plug technology, which is used in wellbore/well components, earth-moving drilling, sealing/packing, etc., can solve the problems of high jamming risk and poor pipe string safety in open-hole wells, and achieve strong drillability. , Simple structure, high strength effect

Active Publication Date: 2015-12-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of high sealing risk and poor safety of the pipe string in the prior art, the present invention provides an open-hole easy-drilling bridge plug, which adopts the open-hole easy-drilling bridge plug body and Lost tool, realize drillable bridge plug plugging in open hole, used for mechanical plugging or chemical plugging string in open hole, can seal in two directions and drill out safely and quickly

Method used

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  • An easy-to-drill bridge plug for open-hole wells
  • An easy-to-drill bridge plug for open-hole wells

Examples

Experimental program
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Effect test

Embodiment

[0027] An open hole easy-drill bridge plug.

[0028] Including: open hole easy-drilling bridge plug body and throw away tools,

[0029] The hands-free tool includes: an upper joint, a connecting pipe, a central pipe, a piston, a lower piston, a cylinder liner and a spring claw,

[0030] The upper joint is tubular, sleeved on the upper end of the central pipe, and threadedly connected with the central pipe; the outer wall of the lower end of the upper joint is covered with a connecting pipe, and the upper joint and the connecting pipe are connected by pins;

[0031] The piston is stepped, and the outer wall of the lower end of the connecting pipe is fixedly connected with the inner wall of the upper end of the piston; the cylinder liner is arranged outside the piston, and is fixedly connected with the outer wall of the piston, and the piston is stuck in the space formed by the cylinder liner and the central tube. A pressure transmission hole is provided, the outer wall of the ...

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Abstract

The invention discloses an open hole easy-drilled bridge plug which comprises an open hole easy-drilled bridge plug body and a releasing tool. The releasing tool comprises an upper connector, a connection pipe, a center pipe, a piston, a lower piston, a cylinder sleeve and a spring claw. The open hole easy-drilled bridge plug body comprises a body center pipe, a rubber sleeve capable of expanding when meeting hydrocarbon and water and a lower connector. By means of the open hole easy-drilled bridge plug body adopting the rubber capable of expanding when meeting hydrocarbon and water and the releasing tool, drillable bridge plug blocking of an open hole is achieved. The plug is used for mechanical blocking of the open hole or blocking removing tubular columns, is capable of conducting two-way sealing and can be removed in a drilling mode safely and quickly.

Description

technical field [0001] The invention relates to the field of drilling, and more particularly relates to an open-hole easy-drilling bridge plug. Background technique [0002] When the open hole packer is used in open hole wells, especially open hole horizontal wells, it is difficult to remove due to reasons such as irregular diameter and wall collapse, especially in the construction of sand production wells and chemical plugging wells, the risk is extremely high. The drillable bridge plug can be safely drilled out after construction, and has high safety, but there is no drillable bridge plug for open hole at present. [0003] Ordinary lost-hand bridge plugs use compression-type rubber cartridges with small expansion ratios and are not suitable for open-hole wells. Moreover, the current drillable bridge plugs are usually made of ductile iron, brass and other materials. Although they can be drilled out after construction, the drilling and milling cycle is long. [0004] The o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/134
Inventor 岳慧何祖清丁士东付道明彭汉修吴俊霞庞伟赵旭
Owner CHINA PETROLEUM & CHEM CORP
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