Well cementing high-temperature inhibiting agent for oil gas well and preparation method

A retarder and technology for oil and gas wells, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as relatively large stability restrictions, and achieve the effect of wide operating temperature range
CN101402849AInactive Publication Date: 2009-04-08CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (EAST CHINA)
Publication Date
2009-04-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a novel cement high temperature retarder used for cementing an oil (gas) well as well as a preparing method thereof. The invention relates to a macromolecular polymer which has high temperature resistance and is prepared by using an acetone liquid to deposit and wash an itaconic acid, 2-acrylamide-2-methyl propane sulfonic acid (AMPS), benzoperoxide and the like which are taken as materials. The novel cement high temperature retarder added into a cement pulp has the characteristics of good retardation effect, good fluidity as well as salt and calcium resistance under high temperature and the like. The invention can meet the demands of safe construction on cementing depth wells and ultra-deep wells.
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Description

technical field

[0001] The invention relates to a high-temperature retarder for prolonging the thickening time of oil well cement slurry, and is especially suitable for the high-temperature environment existing in deep and ultra-deep well cementing. Background technique

[0002] From 2004 to 2005, the Chinese government conducted a comprehensive evaluation study on my country's oil and gas resources, and the evaluation results showed that 73% of the remaining reserves of my country's oil and gas resources are buried in deep layers. With the increase of well depth, the role of high-temperature coagulants in the drilling and development of deep and ultra-deep wells is becoming more and more important. At present, the development of cement slurry retarder has made remarkable achievements.

[0003] The first generation of cement retarders were lignosulfonates, which were natural resources that provided a cost-effective solution to some problems, but had some drawbacks. As a na...

Claims

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