Leaking stoppage reinforcing agent

Abstract

The invention discloses a leaking stoppage reinforcing agent comprising the following components in parts by weight: 20-30 parts of sodium silicate, 20-30 parts of phenolic resin, 30-50 parts of calcium carbonate, 1-5 parts of potassium silicate, 1-5 parts of sodium sulfite, 0.5-3 parts of polyacrylamide (PAM), 0.5-3 parts of sodium carboxymethylcellulose CMC-LV and 0.5-3 parts of hydroxyethyl cellulose (HEC). According to a conventional preparation method, the materials are added into a kneading machine in sequence in parts by weight at normal temperature and under normal pressure and then are uniformly mixed and stirred, and then the mixture is crushed into granular products, of which the particle size is 0.01mm-0.3mm, after being dried. The leaking stoppage reinforcing agent disclosed by the invention has the characteristics of easily available raw materials, scientific and simple process, safe construction, capability of reinforcing the wall of a leakage stratum well, capability of being added into different types of leaking stoppage slurry when being used together with other materials for reinforcement, capability of improving the reinforcing performance of leaking stoppage slurry and the like, and is widely applied to petroleum and geological drilling engineering.

Description

technical field [0001] The invention relates to a plugging substance for petroleum drilling engineering, in particular to a plugging and strengthening agent. Background technique [0002] The plugging materials in oil drilling engineering often use hard walnut shells, hard shell powder, granite, large particle size calcium carbonate, cement, etc. as plugging reinforcement agents. The following shortcomings or deficiencies: ①The above-mentioned plugging materials are hard and easy to cause damage to the pump parts; ②There is no cementing performance, the plugging effect is poor, and the plugging failure is likely to occur after the pump cycle pressure is excited; ③The reinforcement plugging material consumes a lot , the plugging time is long, the repeated leakage is serious, and the cost is high; ④ In order to improve the reinforcement capacity, the only way to increase the amount of cement is to increase the amount of cement added. When the amount of cement added is too larg...

AI Technical Summary

Problems solved by technology

[0002] The plugging materials in oil drilling engineering often use hard walnut shells, hard shell powder, granite, large particle size calcium carbonate, cement, etc. as plugging reinforcement agents. The following shortcomings or deficiencies: ①The above-mentioned plugging materials are hard and easy to cause damage to the pump parts; ②There is no cementing performance, the plugging effect is poor, and the plugging failure is likely to occur after the pump cycle pressure is excited; ③The reinforcement plugging material consumes a lot , the plugging time is long, the repeated leakage is serious, and the cost is high; ④ In order to improve the reinforcement capacity, the only way to increase the amount of cement is to increase the amount of cement added. When the amount of cement added is too large, it will increase the density of the plugging slurry It is very easy to press leakage in the formation, and it is easy to release free water after adding cement; ⑤When the cement is added in a large amount, it is easy to solidify quickly, resulting in complicated downhole conditions, resulting in repeated leakage, causing great economic losses, and directly affecting the plugging effect and drilling engineering