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A kind of biodiesel lubricant for water-based drilling fluid and its preparation method and application

A technology of water-based drilling fluid and biodiesel, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problem of not meeting the requirements of lubricant temperature resistance, affecting the biodegradability of lubricants, and affecting the function of lubricants Effect and other issues, to achieve the effect of good compatibility, good synergy, and reduce friction coefficient

Active Publication Date: 2016-05-04
DAQING BEIHUA CHEM PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The lubricant mainly uses biodiesel instead of white oil and diesel oil to develop biodiesel drilling fluid lubricants suitable for water-based drilling fluids. The effect of the lubricant; (2) From the formula and performance of the lubrication system, it is not conducive to use under high-temperature drilling conditions; (3) The formed lubricating film is single and lubricated during the severe collision between the drill string and the well wall less effective
The lubricant has the advantages of stable performance at a high temperature of 120°C, but has the following disadvantages: (1) The base oil is added with mineral oil, which makes the lubricant have a higher fluorescence level and affects the biodegradability of the lubricant; (2) ) Although the lubricant can withstand 120°C, it still cannot meet the requirements of deep well and ultra-deep well drilling for lubricant temperature resistance

Method used

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  • A kind of biodiesel lubricant for water-based drilling fluid and its preparation method and application
  • A kind of biodiesel lubricant for water-based drilling fluid and its preparation method and application
  • A kind of biodiesel lubricant for water-based drilling fluid and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The formula of the lubricant of the present embodiment:

[0051] 80 parts by weight of biodiesel;

[0052] 20 parts by weight of water;

[0053] Based on the total weight of biodiesel and water as 100%:

[0054]

[0055] The preparation method of the lubricant of the present embodiment is as follows:

[0056] Add 3g of phosphate ester extreme pressure lubricant (the phosphate ester was purchased from KNAO Trading (Shanghai) Co., Ltd., product model S-830), 2g of Span80 lipophilic emulsifier, and 2g of graphite solid lubricant into 80g of fatty acid methyl ester In biodiesel, stir for 1 hour at room temperature and at a speed of 400 r / min to obtain an oil phase;

[0057] Add 2g of Tween80 hydrophilic emulsifier into 20g of water, stir evenly to form a solution, then add 0.1g of sodium carboxymethylcellulose dispersant, stir until completely dissolved, and obtain an aqueous phase;

[0058] Add the prepared water phase to the stirred oil phase, stir for 6 hours at a...

Embodiment 2

[0075] The formula of the lubricant of the present embodiment:

[0076] 75 parts by weight of biodiesel;

[0077] 25 parts by weight of water;

[0078] Based on the total weight of biodiesel and water as 100%:

[0079]

[0080] The preparation method of the lubricant of the present embodiment is as follows:

[0081] Add 5g of phosphate ester extreme pressure lubricant (the phosphate ester was purchased from KNAO Trading (Shanghai) Co., Ltd., product model S-830), 3g of Span80 lipophilic emulsifier, and 3g of graphite solid lubricant into 75g of fatty acid methyl ester In biodiesel, stir for 1.5h at room temperature and at a speed of 800r / min to obtain an oil phase;

[0082] Add 4g of Tween80 hydrophilic emulsifier into 25g of water, stir evenly to form a solution, then add 0.2g of sodium carboxymethylcellulose dispersant, stir until completely dissolved, and obtain an aqueous phase;

[0083] The prepared water phase was added to the stirred oil phase, stirred for 5 hour...

Embodiment 3

[0091] The formula of the lubricant of the present embodiment:

[0092] 70 parts by weight of biodiesel;

[0093] 30 parts by weight of water;

[0094] Based on the total weight of biodiesel and water as 100%:

[0095]

[0096] The preparation method of the lubricant of the present embodiment is as follows:

[0097] Add 1g of oil-soluble boron nitride (purchased from Ningxia Dongke Petrochemical Co., Ltd., product model T391), 1g of Span80 lipophilic emulsifier, and 1g of graphite solid lubricant to 70g of fatty acid methyl ester biodiesel, at room temperature and at a speed of 600r / Stir for 1 h under the condition of min to obtain the oil phase;

[0098] Add 2g of Tween80 hydrophilic emulsifier into 30g of water, stir evenly to form a solution, then add 0.3g of sodium carboxymethylcellulose dispersant, stir until completely dissolved, and obtain an aqueous phase;

[0099] The prepared water phase was added to the stirred oil phase, stirred for 3 hours at a temperature...

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Abstract

The invention discloses a biodiesel lubricant for a water-based drilling fluid and a preparation method and application thereof. The biodiesel lubricant for the water-based drilling fluid comprises the following raw components in part by weight: 70-90 parts of biodiesel and 10-30 parts of water, with a total weight of 100%; and the biodiesel lubricant for the water-based drilling fluid further comprises 1-6% of lipophilic emulsifier, 1-8% of hydrophilic emulsifier, 1-10% of extreme pressure lubricant, 1-5% of solid lubricant and 0.05-0.3% of dispersing agent. The biodiesel lubricant for the water-based drilling fluid has the advantages of no fluorescence, low biotoxicity, easy biodegration, good compatibility with the drilling fluid, high salt resistance, especially good lubricating property at high temperature, relatively low cost, wide source of raw materials and wide applicability.

Description

technical field [0001] The invention relates to a lubricant and its preparation method and application, in particular to a biodiesel lubricant for water-based drilling fluid and its preparation method and application. Background technique [0002] In recent years, with the increasing difficulty and complexity of oil exploration and development, the number of deep wells, ultra-deep wells, horizontal wells, and extended-reach wells has gradually increased. And the resulting drill tool wear and failure accidents are also on the rise. The usual practice is to add a certain amount of lubricant to the drilling fluid to reduce the frictional resistance between the drill bit and the bottom hole rock, the drill string and the well wall rock, the drill string and the surface layer or technical casing, reduce stuck pipe, and reduce energy loss. consumption. [0003] At present, the commonly used drilling fluid lubricants mainly use mineral oil or vegetable oil as the base oil of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03C09K8/10
Inventor 赵雄虎张奎董文涛
Owner DAQING BEIHUA CHEM PLANT
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