Rapidly degradable bridge plug with degradation-promoting central pipe

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...

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 before putting into production after the conventional bridge plug is sealed, so that the oil and gas well cannot be put into production quickly after fracturing bridge plug

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