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Composite lubricant for drilling fluid, preparation method and application thereof

A compound lubricant and drilling fluid technology, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of increased drill pipe wear, limited lubricant application range, and unenvironmental protection of lubricating oil, and achieves temperature resistance It has good thermal stability, is suitable for widespread application, and realizes the effect of resource reuse.

Active Publication Date: 2018-03-23
任丘市力科节能材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the lubricant used in general drilling fluid is to reduce the frictional resistance and the viscosity coefficient of the mud cake, but its own temperature resistance is relatively poor, and the lubrication effect is significantly deteriorated under the conditions of high temperature and high salt, which increases the pressure during deep well drilling construction. Differential pressure sticking, the drill pipe is easy to depressurize, especially in irregular well diameter and deviated wells and directional wells, the wear of the drill pipe increases
[0005] In addition, most of the drilling lubricating oils in the prior art are mineral lubricants, the main components of which are hydrocarbon compounds. This type of lubricating oil itself is not environmentally friendly, and will remain in water and soil during use, causing environmental pollution. When the pollution is serious, it will also cause toxicity to the microorganisms in the soil, which seriously limits the application range of the lubricant itself, which is not conducive to the continued expansion of applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The raw materials of the lubricant are proportioned according to the following quality:

[0050] Fatty alcohol polyoxyethylene ether 60kg, glycerin fatty acid ester 30kg, waste animal fat 40kg, styrene 5kg, water-soluble carbon black 9kg, graphene 5kg, tricresyl phosphate, triphenyl phosphate 3kg, sodium lignin 1kg, silane Antifoaming agent 3kg;

[0051] The preparation method is as follows:

[0052] 1) First add fatty alcohol polyoxyethylene ether, glycerin fatty acid ester, waste animal fat and styrene into the stirring tank, and heat up to 80-90°C while stirring;

[0053] 2) Add water-soluble carbon black, graphene, tricresyl phosphate, triphenyl phosphate, sodium ligninate, and silane defoamer into the stirring tank in sequence, and control the temperature between 50-70°C while stirring. After fully stirring and mixing for 10-20 minutes, the lubricant is obtained, which is packed into a 10kg / bag finished product and stored in a dry place at room temperature.

Embodiment 2

[0055] The raw materials of the lubricant are proportioned according to the following quality:

[0056] Fatty alcohol polyoxyethylene ether 90kg, propylene glycol monooleate 60kg, waste animal fat 20kg, styrene 10kg, water-soluble carbon black 5kg, graphene 2kg, dialkyl dithiocarbamate 1kg, sodium lignate , polyacrylamide 3kg, silane defoamer 1kg;

[0057] The preparation method is as follows:

[0058] 1) After the water-soluble carbon black, biomass graphene and water are miscible, ultrasonic treatment is carried out. The power of the ultrasonic wave is 1000w, and the ultrasonic wave is used for 5 minutes to disperse and form a uniform mixed solution for later use;

[0059] 2) Add fatty alcohol polyoxyethylene ether, propylene glycol monooleate, waste animal fat and styrene into the stirring tank, heat up to 80-90°C while stirring, and stir for 10 hours;

[0060] 3) Add the mixed solution containing water-soluble carbon black, biomass graphene, dialkyl dithiocarbamate, sodi...

Embodiment 3

[0062] The raw materials of the lubricant are proportioned according to the following quality:

[0063] Fatty alcohol polyoxyethylene ether 65kg, triethanolamine oleate 55kg, waste animal fat 25kg, styrene 7kg, water-soluble carbon black 6kg, biomass graphene 3kg, triphenyl phosphate, triethyl phosphate 2kg, ligninic acid Sodium, cellulose derivatives 2kg, silane defoamer 2kg;

[0064] The preparation method is as follows:

[0065] 1) First, water-soluble carbon black, biomass graphene and water are miscible, and then ultrasonic treatment is performed. The power of the ultrasonic wave is 500w, and the ultrasonic wave is used for 30 minutes to disperse and form a uniform mixed solution, which is ready for use;

[0066] 2) Add fatty alcohol polyoxyethylene ether, triethanolamine oleate, waste animal fat and styrene into the stirring tank, heat up to 80-90°C while stirring, and stir for 18 hours;

[0067] 3) Add the mixed solution containing water-soluble carbon black, biomass ...

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PUM

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Abstract

The invention discloses a composite lubricant for drilling fluid. The composite lubricant is mainly prepared from the following raw materials in parts by mass: 60 to 90 parts of fatty alcohol-polyoxyethylene ether, 30 to 60 parts of fatty acid ester, 20 to 40 parts of waste animal fat, 5 to 10 parts of vinyl benzene, 5 to 9 parts of water-soluble carbon black, 2 to 5 parts of graphene substances, 1 to 3 parts of an extreme pressure anti-wear reagent, 1 to 3 parts of a dispersing agent, and 1 to 3 parts of a defoamer. The preparation method comprises the following steps: uniformly mixing and stirring the fatty alcohol-polyoxyethylene ether, the fatty alcohol-polyoxyethylene ether, the waste animal fat and vinyl benzene; adding the water-soluble carbon black, the graphene substances, the extreme pressure anti-wear reagent, the dispersing agent and the defoamer sequentially, performing mixing and stirring, and cooling the raw materials to 50 to 70 DEG C while stirring, so as to form uniform emulsion. The composite lubricant is high in temperature resistance and anti-pressure capacity, and can still keep good lubricating property under high-temperature and high-pressure conditions, biodiesel fuel is taken as a raw material for the main components of the composite lubricant, and no polluted component is contained.

Description

technical field [0001] The invention relates to the field of oilfield drilling preparation, in particular to a composite lubricant for drilling fluid and its preparation method and application. Background technique [0002] With the development of oil exploration and development to the deep and offshore, more and more deep wells, ultra-deep wells and special process wells are drilled, especially the drilling of ultra-high temperature and ultra-high pressure formations, which also put forward higher requirements for drilling fluids. [0003] Due to the high proportion of clay contained in shale formations, it is easy to hydrate, which has a great negative impact on drilling operations. During the drilling process, there are often problems such as wellbore instability, hole diameter expansion, pipe sticking, torque and resistance increase, etc. A series of downhole complex situations have increased the difficulty of drilling. In oil drilling and completion operations, various...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03
CPCC09K8/03C09K2208/34
Inventor 刘俊青
Owner 任丘市力科节能材料有限公司
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