Multifunctional connecting bridging agent
A connecting bridge and multi-functional technology, applied in the field of drilling plugging bridge plugging agent, can solve the problems of long plugging time, loss of plugging agent, and reduction of plugging effect, etc. The effect of reducing the leakage space
Active Publication Date: 2012-05-30
DONGYING TAIER GASOLINE TECH
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Problems solved by technology
[0002] In oil drilling, large-scale vicious lost circulation such as: large fractures, large karst caves, stratum venting, underground rivers, serious formation deficits and other complex formations, currently generally use walnut shells, peanut shells, sawdust, cottonseed husks, mica sheets, rubber granules, High-expansion polymers and other materials can be used for plugging. The above-mentioned materials can play a role in plugging in general, but they have the following shortcomings and shortcomings: ①No effect, and consume a large amount of plugging materials; ②Long plugging time, extremely It is easy to cause complicated downhole conditions; ③ large fractures, large karst cave formations, and seriously deficient formations are difficult to solve for plugging; ④ When the hardness and particle size of the plugging agent material are not suitable, they cannot be pumped into the leakage channel, let alone enter the leakage channel. The bridge cannot be formed into a network structure, and the lost space of the lost channel cannot be reduced, and stagnation and accumulation cannot occur in the lost channel, resulting in the rapid loss of the plugging agent in the lost channel, resulting in repeated plugging. Occurs, reducing the plugging effect and affecting the drilling speed
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[0013] A multi-functional connecting bridging agent, its composition and content, the content is in parts by weight: cotton flap 30-40; furfural 10-20; corn orange core 10-20; special sawdust 5-10; cotton husk 5-10;
[0014] Preparation method: the above-mentioned substances are stirred and mixed uniformly by conventional preparation methods under normal temperature and pressure according to their components and contents. When in use, add 2%-15% of the multifunctional connection bridging agent of the present invention in the lost circulation drilling fluid of the total amount of the lost circulation drilling fluid. Provide specific embodiment below:
[0015] Case 1
[0016] Cotton flap 30 furfural 10 corn core 10 special sawdust 5 cotton husk 5. The above-mentioned substances are stirred and mixed evenly according to their components and contents under normal temperature and pressure by conventional preparation methods. Add the multifunctional bridging agent of the present ...
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The invention discloses a multifunctional connecting bridging agent comprising the following materials in parts by weight: 30-40 parts of cotton petals, 10-20 parts of furfural, 10-20 parts of corn stalk cores, 5-10 parts of purpose-made wooden meals and 5-10 parts of cotton barks. The multifunctional connecting bridging agent is prepared by uniformly stirring and mixing the materials in parts byweight by a conventional preparation method. The invention has the advantages of extensive material sources, no toxin or pollution, simple and convenient construction technology, good connection property in a large crack, a large karst cave, a subterranean river and a serious voided leaking layer of a stratum, large net forming area, high bridging capability, and the like and is widely used in oil and geological exploration technologies and especially suitable for the plugging construction of the large crack, the large karst cave, the subterranean river and the serious voided stratum.
Description
1. Technical field [0001] The invention relates to a bridging agent for drilling leakage plugging, in particular to a multifunctional connection bridging agent. 2. Background technology [0002] In oil drilling, large-scale vicious lost circulation such as: large fractures, large karst caves, stratum venting, underground rivers, serious formation deficits and other complex formations, currently generally use walnut shells, peanut shells, sawdust, cottonseed husks, mica sheets, rubber granules, High-expansion polymers and other materials can be used for plugging. The above-mentioned materials can play a role in plugging in general, but they have the following shortcomings and shortcomings: ①No effect, and consume a large amount of plugging materials; ②Long plugging time, extremely It is easy to cause complicated downhole conditions; ③ large fractures, large karst cave formations, and seriously deficient formations are difficult to solve for plugging; ④ When the hardness and p...
Claims
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IPC IPC(8): C09K8/42
Inventor隋跃华关芳张建阔隋永泉崔元强张涛崔亘宇崔国欣苏振宝刘密密张庆波
OwnerDONGYING TAIER GASOLINE TECH