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Composite resin anti-high temperature anti-collapse fluid loss agent for drilling fluid

A technology of composite resin and fluid loss reducer, which is applied in the field of drilling fluid additives and can solve the problems of not being able to meet the practical requirements of drilling at high temperature and poor effect

Active Publication Date: 2016-01-13
MENGZHOU CITY DEGE WATER PURIFICATION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing anti-slump fluid loss agents have poor effects at high temperatures and cannot meet the actual practical needs of drilling at high temperatures

Method used

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  • Composite resin anti-high temperature anti-collapse fluid loss agent for drilling fluid

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Embodiment Construction

[0013] The composite resin anti-high temperature anti-slump anti-slump fluid loss agent for drilling fluid of the present invention is calculated by the following weight percentages: 5% phenol, 20% formaldehyde, 10% anhydrous sodium sulfite, 8% sodium pyrosulfite, sodium hydroxide 18%, humic acid 30% and water 9%. During preparation, add water, humic acid, and sodium hydroxide to the reactor (in proportion) and heat up to 80°C, react for 2.5 hours, remove slag, and obtain mother liquor. Add phenol, formaldehyde, anhydrous sodium sulfite, and sodium metabisulfite (in proportion) to the mother liquor, raise the temperature to 130°C, and react for 3 hours to obtain the reaction material, which is dried and packaged as a finished product.

[0014] The composite resin anti-high temperature anti-slump anti-slump fluid loss agent for drilling fluid of the present invention is calculated by the following weight percentages: 15% phenol, 30% formaldehyde, 5% anhydrous sodium sulfite, 3% ...

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Abstract

The invention relates to a compound resin high-temperature-resistant anti-collapse water-loss reducing agent for a drilling fluid, belonging to drilling fluid assistants. The water-loss reducing agent is prepared from the following components in percentage by weight: 5-15% of phenol, 20-30% of formaldehyde, 5-10% of anhydrous sodium sulfite, 3-8% of nano pyrosulfite, 10-18% of sodium hydroxide, 30-55% of humic acid and the balance of water. The water-loss reducing agent can ensure the stable dispersed state of clay, prevent the dispersed clay from aggregation and growth and ensure sufficient clay particles in the drilling fluid, thereby being beneficial to forming a compact sludge cake; due to the deformability of the resin, the formed sludge cake is thin and compact, and has the advantages of favorable compressibility and lower water loss; the water-loss reducing agent can enhance the lubricating property of the sludge cake, and has certain salt resistance; and the protecting wall performs the anti-collapse function on the compact sludge cake at high temperature.

Description

technical field [0001] The invention relates to a drilling fluid additive, in particular to a composite resin anti-high temperature and anti-slump fluid loss agent for drilling fluid. Background technique [0002] Wellbore instability is one of the main technical problems in drilling engineering, and drilling fluid is one of the key factors affecting the stability of wellbore. Therefore, developing an anti-slump drilling fluid system with excellent performance to solve the problem of wellbore collapse and instability during drilling and keep the wellbore stable is an important technology to ensure wellbore quality and increase drilling speed. [0003] Under the circumstance that the recoverable and easy-to-recover reserves of oil are constantly decreasing, the exploration and development of oilfields have developed into marine, complex strata, medium-deep wells, deep wells and ultra-deep wells. many questions. The existing anti-slump fluid loss agents have poor effects at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C08G8/34C08G8/10
Inventor 周瑜葛周庆丰
Owner MENGZHOU CITY DEGE WATER PURIFICATION MATERIAL