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Method for preparing high-temperature resistant and salt resistant shear strength-improving agent for drilling fluid

A high temperature resistance and drilling fluid technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of rare on-site successful application examples, less research on cutting agents, and stagnation of research work, etc., to achieve good results Environmental protection effect, low cost, low plastic viscosity effect

Active Publication Date: 2013-02-20
北京奥凯立科技发展股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are relatively few studies on cutting agents, especially in recent years, the research work in this area has almost stagnated, and there are even fewer examples of successful field applications, and there is a lack of suitable for special bottom conditions (such as high temperature resistance, salt water resistance, etc.) ) cutting agent

Method used

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  • Method for preparing high-temperature resistant and salt resistant shear strength-improving agent for drilling fluid

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Embodiment Construction

[0006] (1) Preparation of anti-high temperature and anti-salt anti-shearing agent for drilling fluid:

[0007] The preparation method of the anti-high temperature and anti-salt anti-shearing agent for drilling fluid in this embodiment comprises the following steps:

[0008] (1) Raw material preparation: alkali metal, water, starch, organic sodium salt and reduction initiator, calculated with the addition amount of every 100 milliliters of water: alkali metal 18.8 grams, starch 24.7 grams, organic sodium salt 13.3 grams, reduction initiator 0.15 gram;

[0009] (2) Mother liquor preparation: according to the raw material ratio of step (1), alkali metal and water are reacted, and starch is added after completion of the reaction;

[0010] (3) Chelate copolymerization: add organic sodium salt to the mixture obtained in step (2) under stirring, then heat to 80°C, and react for 1h;

[0011] (4) Adding auxiliary materials: adding a reduction initiator to the mixture obtained in step...

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Abstract

The invention relates to a method for preparing a high-temperature resistant and salt resistant shear strength-improving agent for drilling fluid, which comprises the following: (1) a step of preparing raw materials, in which 18.5 to 19.1 grams of alkali metal, 24.5 to 25 grams of starch, 13.0 to 13.5 grams of organic sodium salt and 0.1 to 0.2 grams of reducing initiator are added according to the addition amount in each 100 milliliters of water; (2) a step of preparing mother solution, in which the alkali metal and water are reacted according to the raw material mixing ratio in the step (1), and the starch is added after the reaction is completed; (3) a step of performing chelation and copolymerization, in which an organic sodium salt is added into the mixture obtained by the step (2) under a stirring condition, the mixture is heated to 70 to 80 DEG C, and a reaction is performed for 1 hour; (4) a step of adding auxiliary material, in which the reducing initiator is added into the mixture obtained by the step (3), the mixture is heated to 120 DEG C and the reaction is performed at a constant temperature for 4 hours; and (5) a step of drying and crushing, in which the mixture obtained by the step (4) is dried at 100 DEG C and crushed. The high-temperature resistant and salt resistant shear strength-improving agent for drilling fluid, which is prepared by the method of the invention, has high high-temperature and salt resistance.

Description

technical field [0001] The invention relates to a shear raising agent for drilling fluid used in petroleum exploration drilling, in particular to a shear raising agent with high temperature resistance, salt resistance and no pollution. Background technique [0002] With the increase of world energy demand and the development of drilling technology, the number of deep wells and ultra-deep wells in my country is also increasing. During drilling, the deeper the wellbore, the higher the temperature inside the wellbore. Because all additives in drilling fluid will be oxidized and decomposed to lose their original structure under high temperature conditions, the rheology of drilling fluid is difficult to control, and the problem of high temperature resistance of drilling fluid is becoming more and more prominent. The anti-high temperature cutting agent is one of the indispensable drilling fluid treatment agents in the drilling process. It can adjust the suspended cuttings in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
Inventor 张亮亮田相友顾新波王雷董海军
Owner 北京奥凯立科技发展股份有限公司
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