High-elasticity waterproof plugging agent

Abstract

The invention relates to the technical field of plugging agents, particularly a high-elasticity waterproof plugging agent. The high-elasticity waterproof plugging agent is prepared from the following raw materials in parts by weight: 30-50 parts of silicon rubber, 20-30 parts of sulfoaluminate cement, 10-20 parts of lithium chloride, 15-25 parts of talcum powder, 6-12 parts of coconut root-barks, 6-10 parts of shells, 2-6 parts of polytetrafluoroethylene, 7-15 parts of sodium tripolyphosphate and 5-10 parts of hydroxypropyl methyl cellulose. The high-elasticity waterproof plugging agent provided by the invention has high compression elasticity, and is remarkable and efficient in plugging effect and strong in leakage layer lingering property, and a plugging layer is high in loading capacity within a short time, good in flowability and elastic and variable in shaped under pressure.

Description

technical field [0001] The invention relates to the technical field of leak-stopping agents, in particular to a highly elastic waterproof leak-stopping agent. Background technique [0002] Conventional plugging agents are used in oil drilling, such as walnut shells, shell powder, mica flakes, rice husks, etc. These bridging agents have made contributions to oil drilling, but at the same time there are the following shortcomings or deficiencies: ① Poor effect; ②The consumption of plugging materials is large, and the plugging time is long; ③The pump parts are seriously damaged, causing complex accidents downhole; ④The compound application can deal with permeability loss, and has a certain plugging effect in the construction of medium and small fractures and porous formations , can not be solved when large-scale leakage is encountered; ⑤The walnut shell is rigid and hard, not elastic, and is easy to seal at the entrance of the leakage channel, so that the plugging material with...

AI Technical Summary

Problems solved by technology

[0002] Conventional plugging agents are used in oil drilling, such as walnut shells, shell powder, mica flakes, rice husks, etc. These bridging agents have made contributions to oil drilling, but at the same time there are the following shortcomings or deficiencies: ① Poor effect; ②The consumption of plugging materials is large, and the plugging time is long; ③The pump parts are seriously damaged, causing complex accidents downhole; ④The compound application can deal with permeability loss, and has a certain plugging effect in the construction of medium and small fractures and porous formations , can not be solved when large-scale leakage is encountered; ⑤The walnut shell is rigid and hard, not elastic, and is easy to seal at the entrance of the leakage channel, so that the plugging material with large particle size cannot enter the depth of the leakage channel, causing temporary blockage The false appearance of leaking, resulting in repeated leaks, resulting in great economic losses, directly affecting the plugging effect and drilling engineering

The above-mentioned substances are added to natural rubber in sequence according to their components and contents under normal temperature and pressure by conventional preparation methods, mixed and stirred evenly, and dried and crushed into granules of 0.05mm-50mm. It has a wide range of raw material sources and a process It is simple in science, safe in construction, high in plugging rate, strong in compressibility, and high in plugging success rate, but it is not strong enough to withstand pressure

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