Rapidly degradable bridge plug with degradation-promoting central pipe

A fast-degradable, center-pipe technology, applied in wellbore/well components, earthwork drilling, sealing/isolation, etc., can solve the problems that oil and gas wells cannot be put into production quickly, and achieve the effect of improving operation efficiency and reasonable structure

Active Publication Date: 2015-11-18
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

[0003] The purpose of the present invention is to provide a rapid degradation-promoting central tube that solves the difficulty of drilling or fishing the bridge plug bef

Method used

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  • Rapidly degradable bridge plug with degradation-promoting central pipe
  • Rapidly degradable bridge plug with degradation-promoting central pipe
  • Rapidly degradable bridge plug with degradation-promoting central pipe

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Embodiment Construction

[0024] The above content of the invention of the present invention will be further described in detail below in conjunction with specific embodiments. However, it should not be construed that the scope of the above-mentioned subject matter of the present invention is limited to the following examples. Without departing from the above-mentioned technical idea of ​​the present invention, various replacements and changes made according to common technical knowledge and customary means in this field shall be included in the scope of the present invention.

[0025] Such as Figure 1~2 As shown, the degradable bridge plug includes a central tube 1, a first slip seat 2, a first slip 3, a first cone 4, a rubber cartridge 5, a second cone 6, and a second slip 7 , the second slip seat 8, the guide sealing head 9, the push sleeve 11, the pull rod 13 and the pressing block 12, wherein:

[0026] The central pipe 1 includes a central pipe body 104, a catalyst cartridge 106 containing a ca...

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Abstract

The invention discloses a rapidly degradable bridge plug with a degradation-promoting central pipe, comprising the central pipe, a first slip base, a first slip, a first cone, a rubber cylinder, a second cone, a second slip, a second slip base, a guide seal, a push cylinder sleeve, a pull rod and a presser block. The central pipe comprises a body, a catalyst cylinder and a plug; all of the central pipe, the first slip base, the first cone, the second cone, the second slip base and the guide seal are made of degradable materials; a catalyst in the catalyst cylinder accelerates decomposition of the degradable materials; by using the bridge plug made of the degradable materials, degradation of the bridge plug is accelerated under the decomposition acceleration action of the catalyst; the bridge plug is reasonable in structure; the degrading speed in oil, low-temperature or low-salinity water environments is satisfied; before production, no plug drilling or fishing is required, and operating efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of downhole tools for oil and gas field development and application, in particular to a degradable bridge plug. Background technique [0002] In the process of oil test seal, stuck layer or fracturing, it is often necessary to use bridge plugs to seal off the perforated or fractured well section. Most of the bridge plugs currently used are drillable or fishable. After fracturing, it is necessary to use tubing with downhole tools to drill or fish the bridge plugs to release the blocked oil layers. Drilling and grinding or salvage failure due to deformation of the pipe. For this reason, it is necessary to study a degradable bridge plug. However, the current degradable metal materials have the problems of high strength, slow dissolution, and fast dissolution, low strength, especially high strength. Degradable metal materials, in the environment of oil, low temperature or low salinity water, the degradation spe...

Claims

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Application Information

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IPC IPC(8): E21B33/134
Inventor 王林张世林邹鹏尹光伟熊芸李楠黄其高鹏越
Owner BC P INC CHINA NAT PETROLEUM CORP
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