Synthetic base drilling fluid

A drilling fluid and synthetic-based technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems that the rheological properties of drilling fluid are affected by temperature and pressure, affect the stability of drilling fluid, and the viscosity of drilling fluid is low. Achieve good ecological safety and compatibility, good oxidation stability and high surface activity

Active Publication Date: 2012-04-25
SHANDONG TIANXIN CHEM
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

At present, the base fluids of synthetic-based drilling fluids can be divided into three types: ester-based, ether-based, and α-olefin. Made of similar components, so the performance is single
Drilling fluids made of ester-based and ether-based base fluids have the following main disadvantages: First, the active carboxyl groups in the base fluid molecules are easily damaged by alkaline or acidic substances to generate alcohols and carboxylic acids. Therefore, during drilling, The intrusion of acid gas will lead to ester hydrolysis, which will affect the stability of drilling fluid. Second, when drilling offshore wells, the drilling fluid may drop to around 4°C due to the cooling

Method used

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  • Synthetic base drilling fluid

Examples

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Example Embodiment

[0016] Example 1

[0017] According to the weight ratio, take 1 part of limonene, 0.5 part of dipentene, 5 parts of ethylene glycol monobutyl ether, 1 part of alkyl glycoside, 1.95 parts of alcohol ether carboxylate, 10 parts of white oil and 1.25 parts of dimethicone , Mix and mix the above-mentioned raw materials to obtain a base fluid; add 1 part of calcium hydroxide, 9.43 parts of barite powder and 2.3 parts of water to the above-mentioned base fluid, and then stir evenly to prepare the emulsion as drilling fluid.

Example Embodiment

[0018] Example 2

[0019] According to the weight ratio, take 1 part of limonene, 0.75 part of dipentene, 3 parts of ethylene glycol monobutyl ether, 5 parts of alkyl glycosides, 1.5 parts of alcohol ether carboxylate, 1 part of white oil and 3 parts of dimethicone , Mix and mix the above-mentioned raw materials to obtain a base fluid; add 0.45 parts of calcium hydroxide, 15.25 parts of barite powder and 3.05 parts of water to the above-mentioned base fluid, and then stir evenly to obtain the emulsion that is the drilling fluid.

Example Embodiment

[0020] Example 3

[0021] According to the weight ratio, take 1 part of limonene, 1 part of dipentene, 2.5 parts of ethylene glycol monobutyl ether, 10 parts of alkyl glycosides, 3 parts of alcohol ether carboxylates, 5 parts of white oil and 1.5 parts of dimethyl silicone oil , The above-mentioned raw materials are mixed and mixed uniformly to prepare a base fluid; 0.24 parts of calcium hydroxide, 39.99 parts of barite powder and 8 parts of water are added to the above-mentioned base fluid, and then the emulsion prepared by stirring is uniformly drilling fluid.

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Abstract

The invention discloses synthetic base drilling fluid, which comprises ingredients: base fluid, alkalinity regulating agents, weighting agent and water, wherein emulsion which has the PH value being 8.5 to 10 and the specific weight being 1.2 to 2.0g/cm<3> and is formed by uniformly mixing the ingredients is the drilling fluid, and the base fluid comprises ingredients: limonene, bipentene, butylcellosolve, alkyl polyglucoside, alcohol ether carboxylate, white oil and simethicone. The drilling fluid has the advantages of both ether base type drilling fluid and alpha-olefin type drilling fluid, the influence on the viscosity of the drilling fluid caused by the temperature change is little, the application range is wide, the adopted raw materials hardly contain dutrex, in addition, the price is low, the production cost is low, the biological degradability is good, the environmental-friendly effect is realized, the drilling fluid can adapt to wide acid-base conditions, and excellent surface activity, lubricating performance and chemical stability are realized.

Description

technical field [0001] The present invention relates to a synthetic base drilling fluid. Background technique [0002] Synthetic-based drilling fluids emerged when water-based drilling fluids could not meet the performance requirements of downhole complex conditions, and oil-based drilling fluids could not meet environmental protection requirements. As soon as the synthetic base drilling fluid appeared, it showed a good development prospect and achieved remarkable environmental and economic benefits. [0003] Base fluid is the main component of drilling fluid, and its performance indicators determine most of the performance indicators of drilling fluid, such as flash point, viscosity and freezing point. At present, the base fluids of synthetic-based drilling fluids can be divided into three types: ester-based, ether-based, and α-olefin. Made of similar components, so the performance is single. Drilling fluids made of ester-based and ether-based base fluids have the follow...

Claims

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Application Information

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IPC IPC(8): C09K8/34
Inventor 赵庭栋刘杰单美青闫晓红魏军波徐文辉王善华李世祥
Owner SHANDONG TIANXIN CHEM
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