Anti-pollution high efficiency isolation liquid and preparing method

A spacer fluid and anti-pollution technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of complex on-site preparation and construction procedures of spacer fluid, poor rheological adjustment and control ability, narrow range of spacer fluid density, etc. , to achieve the effect of improving displacement efficiency, strong anti-pollution ability and good chemical compatibility
CN1858146AInactive Publication Date: 2006-11-08SOUTHWEST PETROLEUM UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHWEST PETROLEUM UNIV
Publication Date
2006-11-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to anti-pollution high efficiency isolating liquid for shaft wall cementing operation and its preparation process. The isolating liquid is compounded through adding suspension stabilizer, water reducing agent, tackifier, diluent, viscosity and shearing force increasing agent, weight additive and pH regulator in certain weight proportion into water. One compounding process is a water base process through throwing the said components successively into water in a slurry tank apparatus. One other compounding process is one dry mixture process in a cementing tank apparatus. The isolating liquid has flexible compounding process, high anti-pollution capacity and effective eliminating effect on well wall interface pollutant.
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Description

Technical field

[0001] The invention relates to an anti-pollution high-efficiency isolation fluid used in the technical field of oil drilling engineering cementing technology and a preparation method. Background technique

[0002] For a well (especially a development well), ensuring the quality of cementing is of great significance for extending the life of oil and gas wells, acidizing in the later stage of production, fracturing stimulation, and improving the recovery rate of oil and gas wells.

[0003] There are many measures to improve cementing quality. It is generally believed that wellbore preparation after well completion is one of the key factors affecting cementing displacement efficiency and interface cementation quality. Wellbore preparation includes: good drilling with original drilling tools before running casing; drilling fluid circulation and flushing for at least 2-3 weeks before cementing; performance adjustment during drilling fluid circulation and flushing (vis...

Claims

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