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High-temperature-resistant and saturated salt-resistant lubricant for drilling fluid and preparation method thereof

A technology of high temperature resistance and drilling fluid, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as poor stability, and achieve good stability, good compatibility, and fast drilling effects

Inactive Publication Date: 2017-01-11
成都西油华巍科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a high-temperature and saturated-salt-resistant lubricant for drilling fluids, which solves the problems of poor high-temperature and high-pressure stability of existing drilling fluids and well completion fluids, and has the properties of high temperature resistance, saturated salt resistance, calcium resistance, and a certain extreme pressure film. Strength, environmental protection and non-toxicity, easy biodegradation, moderate price and other characteristics

Method used

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  • High-temperature-resistant and saturated salt-resistant lubricant for drilling fluid and preparation method thereof
  • High-temperature-resistant and saturated salt-resistant lubricant for drilling fluid and preparation method thereof
  • High-temperature-resistant and saturated salt-resistant lubricant for drilling fluid and preparation method thereof

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Effect test

Embodiment 1

[0034] Prepare raw materials according to weight percentage: vegetable oil 65.00%, molybdenum phosphate 1.00%, octylphenol polyoxyethylene ether-100.20%, propylene glycol monostearate 0.50%, concentrated sulfuric acid 0.20% of 70.00% concentration. Add concentrated sulfuric acid to vegetable oil and mix, and stir evenly at 120°C; after the product is cooled at 60°C, add propylene glycol monostearate, octylphenol polyoxyethylene ether-10 to the system, and heat at 120°C Stir evenly at high temperature; after the product is cooled at 60°C, add molybdenum phosphate at the end, stir evenly at 120°C at high temperature, and cool to room temperature to prepare the high temperature and saturated salt lubricant RH-220 for drilling fluid of the present invention.

Embodiment 2

[0036] Prepare materials according to weight percentage: 0# diesel oil 80.00%, molybdenum thiophosphate 2.00%, polydimethylsiloxane 0.60%, sorbic anhydride fatty acid ester 4.00%, concentrated sulfuric acid 0.80% of 75.00% concentration. Add concentrated sulfuric acid to 0# diesel oil and mix, and stir at a high temperature of 120°C; after the product is cooled at 60°C, add sorbic anhydride fatty acid ester and polydimethylsiloxane into the system, and stir at a high temperature of 130°C uniform; after cooling the product at 80°C, add molybdenum thiophosphate at the end, stir evenly at a high temperature of 130°C, and cool to room temperature to obtain the high temperature and saturated salt lubricant RH-220 for drilling fluid of the present invention.

Embodiment 3

[0038] Prepare materials according to weight percentage: 90.00% of -20# diesel oil, 5.00% of molybdenum dithiocarbamate, 1.00% of propylene oxide, 10.00% of polyoxyethylene sorbitan monooleate, and 1.50% of concentrated sulfuric acid with a concentration of 80.00%. Add concentrated sulfuric acid to 20# diesel oil and mix, and stir at a high temperature of 140°C until the product is cooled at 80°C, then add polyoxyethylene sorbitan monooleate and propylene oxide to the system, and carry out Stir evenly at a high temperature of 140°C; after the product is cooled at 80°C, finally add molybdenum dithiocarbamate, stir evenly at a high temperature of 140°C, and cool to room temperature to obtain the high temperature and saturated salt lubrication for drilling fluid of the present invention agent RH-220.

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Abstract

The invention discloses a high-temperature-resistant and saturated salt-resistant lubricant for drilling fluid. The high-temperature-resistant and saturated salt-resistant lubricant comprises 65.00-90.00% of base oil, 1.00-5.00% of an antiwear agent, 0.20-1.00% of a defoamer, 0.50-10.00% of an emulsifier and 0.20-1.50% of a pH regulator, wherein the base oil is one or two of vegetable oil and mineral oil; the antiwear agent is one or more of molybdenum phosphate, molybdenum thiophosphate, molybdenum dithiocarbamate and molybdenum disulfide; the defoamer is one or more of octylphenol polyoxyethylene ether-10, polydimethylsiloxane, propylene oxide and polyoxyethylene polyoxypropylene pentaerythritol ether; the emulsifier is one or more of propylene glycol monostearate, sorbic acid anhydride fatty acid ester and polyoxyethylene sorbitan monooleate; the pH regulator is concentrated sulfuric acid. The high-temperature-resistant and saturated salt-resistant lubricant has characteristics of high temperature resistance, saturation salt resistance and calcium resistance, has a certain extreme film strength, environmental protection, no toxicity, and easy biodegradation, is especially suitable for oil and gas wells with deeply buried reservoirs, high temperature and high pressure, and is applicable to special drilling operations of large-displacement wells, displacement wells, inclined wells, horizontal wells and the like.

Description

technical field [0001] The invention relates to the field of oil and gas well exploitation, in particular to a high-temperature and saturated salt-resistant lubricant for drilling fluid and a preparation method thereof. Background technique [0002] At present, with the expansion and deepening of the field of oil exploration and development, the intensity of drilling and development is increasing, the difficulty of drilling is increasing, and the complexity of drilling is more prominent: deep wells, ultra-deep wells, directional wells, highly deviated wells, horizontal wells, multi-bottom wells, There are more and more wells with special conditions such as slim hole wells, high temperature and high pressure wells, and high-density long open hole wells, and the drilling speed needs to be greatly increased. The use of drilling fluid lubricants is one way to address these complex issues. [0003] In recent years, with the increase of drilling depth, more high temperature, high...

Claims

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Application Information

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IPC IPC(8): C09K8/03C09K8/035
CPCC09K8/03C09K8/035C09K2208/34
Inventor 宋芳
Owner 成都西油华巍科技有限公司
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