Biomass lubricant for drilling fluid and preparation method thereof

A biomass and lubricant technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of difficult dispersion, drilling fluid foaming, non-environmental protection, etc., and achieve good environmental protection, fast drilling, good interaction effect

Active Publication Date: 2021-06-01
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some are mixed with crude oil, white oil and other mineral oils in the drilling fluid, which is not environmentally friendly; some decompose and fail when the pH of the drilling fluid is higher than 10; some make the drilling fluid foam; some are difficult to disperse in salt water, etc.

Method used

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  • Biomass lubricant for drilling fluid and preparation method thereof
  • Biomass lubricant for drilling fluid and preparation method thereof
  • Biomass lubricant for drilling fluid and preparation method thereof

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preparation example Construction

[0048] The present invention also provides a preparation method of the biomass lubricant for drilling fluid described in the above technical scheme, comprising the following steps:

[0049] a) reacting the front fraction of natural fatty alcohol, organic acid and lipase catalyst to obtain biomass base oil;

[0050] b) mixing the biomass base oil obtained in step a) with an ionic liquid anti-wear agent, an emulsifier, a defoamer, a viscosity raising agent and water to obtain a biomass lubricant for drilling fluid.

[0051] In the present invention, firstly, the first part of natural fatty alcohol, organic acid and lipase catalyst are reacted to obtain biomass base oil. In the present invention, the front fraction of the natural fatty alcohol preferably includes one of the front fraction of palm oil natural fatty alcohol, the front fraction of soybean oil natural fatty alcohol and the front fraction of rapeseed oil natural fatty alcohol or more, more preferably the front fracti...

Embodiment 1

[0065] (1) Preparation of biomass base oil:

[0066] In an airtight container equipped with a condensation tube, add successively the front fraction of palm oil natural fatty alcohol, acetic acid and Candida rugosa lipase with a molar ratio of 1: 1: 0.02n (n is the content of palm oil natural fatty alcohol) The molar weight of hydroxyl groups in the previous fraction), under the stirring speed of 100r / min, heated to 30°C for 6h, cooled to room temperature, and took out to obtain biomass base oil.

[0067] According to the method of "The mensuration of nonionic surfactant hydroxyl value" (GB / T 7383-1997), the hydroxyl group (-OH) in the front fraction of palm oil natural fatty alcohol is titrated, thereby determine the numerical value of n, After determination, the molar weight n of hydroxyl groups in the fore fraction of palm oil natural fatty alcohol is 0.31 (the same below).

[0068] (2) Preparation of biomass lubricant:

[0069] According to the percentage by weight of ra...

Embodiment 2

[0071] (1) Preparation of biomass base oil:

[0072] In an airtight container equipped with a condensing tube, sequentially add the front fraction of soybean oil natural fatty alcohol, butyric acid and Candida antarctica lipase (n is the content of soybean oil natural fatty alcohol) in a molar ratio of 1:1:0.05n The molar weight of the hydroxyl groups in the previous fraction), under the stirring speed of 300r / min, heated to 50°C for 12h, cooled to room temperature and taken out to obtain biomass base oil.

[0073] It was determined that the molar amount n of hydroxyl groups in the front fraction of soybean oil natural fatty alcohol was 0.27.

[0074] (2) Preparation of biomass lubricant:

[0075]Prepare raw materials according to percentage by weight, successively with the biomass base oil that 30% step (1) obtains, 5% [EEM][EP] ionic liquid anti-wear agent, 5% diacetyl tartrate monoglyceride emulsifier, 1% Add simethicone-500 defoamer, 0.1% CMC-HV viscosifier and 58.9% dei...

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Abstract

The invention provides a biomass lubricant for drilling fluid, which is prepared from raw materials comprising the following components: 15 to 30 parts by weight of biomass base oil; 3 to 5 parts by weight of ionic liquid antiwear agent; 2 to 5 parts by weight of an emulsifier; 0.5 to 1 part by weight of an antifoaming agent; 0.05 to 0.1 parts by weight of a tackifier; 58 to 80 parts by weight of water; the biomass base oil is made of natural fat It is prepared from the front fraction of alcohol, organic acid and lipase catalyst; the viscosity raising agent is high viscosity sodium carboxymethyl cellulose. Compared with the prior art, the biomass lubricant for drilling fluid provided by the present invention adopts specific content of components to achieve better interaction, and the product has strong lubrication, high temperature resistance, environmental protection and non-toxic characteristics, and good compatibility ; Suitable for special drilling operations such as extended reach wells, deviated wells and horizontal wells, especially for oil and gas wells with deep buried reservoirs and high temperature and high pressure.

Description

technical field [0001] The invention relates to the technical field of oil and gas well exploitation, and more specifically relates to a biomass lubricant for drilling fluid and a preparation method thereof. Background technique [0002] Nowadays, with the expanding field of petroleum exploration and development, the drilling strata are deepening, the drilling methods are constantly being renovated, and the difficulty of drilling is also increasing year by year. Deep wells, ultra-deep wells, directional wells, horizontal wells, extended There are more and more wells with special conditions such as long open hole wells, and the drilling speed needs to be greatly increased. The drilling fluid lubricant can reduce the friction between the well wall and the drilling tool, the drilling tool and the casing, reduce the downhole complex situation, and increase the drilling speed. Therefore, the use of the drilling fluid lubricant is a method to solve these complex problems. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/34
Inventor 单海霞王中华徐勤周亚贤张鑫李彬
Owner 中石化石油工程技术服务有限公司
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