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A degradable drill-free bridge plug

A bridge plug and cone technology, applied to degradable drill-free bridge plugs. It can solve the problems of large time consumption, increased cost and difficulty, and achieve the effect of large diameter

Active Publication Date: 2018-09-25
四机赛瓦石油钻采设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the current technology, drilling and milling bridge plugs after fracturing requires another trip. As the depth of the well increases, the cost and difficulty are increasing, and it takes a lot of time.

Method used

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  • A degradable drill-free bridge plug
  • A degradable drill-free bridge plug
  • A degradable drill-free bridge plug

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] This embodiment provides a degradable drill-free bridge plug, such as figure 1 and figure 2 As shown, it includes central tube 2, guide shoe 12, slip assembly, lower cone 10, inner and outer backing ring assembly 6, end rubber cylinder 7, middle rubber cylinder 9, upper cone 5, slip stop ring 3 and The fracturing ball 1, the lower end of the central tube 2 is provided with a trapezoidal thread, which is connected with the guide shoe 12 through a trapezoidal thread and bonded with thread glue. The middle rubber cylinder 9 has two symmetrical end rubber cylinders 7 and inner and outer backing rings. The assembly 6 protects, the inner and outer back ring assembly 6 is in contact with the upper cone 5 and the lower cone 10, and the tapered side of the upper cone 5 and the lower cone 10 is placed in the middle of the tapered surface formed by the sl...

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Abstract

The invention belongs to the field of oil and gas field equipment, and in particular discloses a degradable drilling-free bridge plug which is made of a special degradable material, so that the degradable drilling-free bridge plug can be dissolved in a specific electrolyte solution; when the bridge plug needs to be removed to unseal a casing, a casing cluster does not need to be drilled, but a certain amount of the electrolyte solution is directly filled into a well, then all bridge plug components can be gradually degraded, and bridge plug residues can be ejected to the ground, so that a large drift diameter can be ensured for the casing.

Description

technical field [0001] The invention belongs to the field of oil and gas field equipment, in particular to a degradable drill-free bridge plug. Background technique [0002] Along with the needs of development, oil and gas resources are gradually replacing coal resources. Now automobiles, industries, national defense, households, etc. have a huge demand for oil and gas resources, which leads to the overexploitation of conventional oil and gas resources, and the exhaustion of conventional oil and gas resources. Unconventional oil and gas resources have gradually come into people's field of vision under the leadership of the American shale gas revolution. It has been proven that unconventional oil and gas resources have huge reserves, mainly some tight shale gas and coalbed methane, all of which are feasible to develop. However, unconventional oil and gas reservoirs are all characterized by low permeability. According to the existing technology, most of the oil and gas reserv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/134
CPCE21B33/134
Inventor 邹刚周歆杨小城蒋韦
Owner 四机赛瓦石油钻采设备有限公司
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