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Water-based lubricant for drilling fluid as well as preparation and application of water-base lubricant

A water-based lubricant and drilling fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as unfavorable environmental protection, the lubricating effect of pure water-based lubricants cannot reach the lubricating effect of oil-based lubricants, etc. , to achieve the effect of improving lubricity, reducing wear resistance of drilling tools, and reducing rotation resistance

Active Publication Date: 2012-09-19
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the internal phase of the oil-in-water emulsion type lubricant contains mineral oil, which is not conducive to environmental protection; the lubricating effect of pure water-based lubricants is generally not as good as that of oil-based lubricants

Method used

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  • Water-based lubricant for drilling fluid as well as preparation and application of water-base lubricant
  • Water-based lubricant for drilling fluid as well as preparation and application of water-base lubricant
  • Water-based lubricant for drilling fluid as well as preparation and application of water-base lubricant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 26.5 parts of distilled water

[0051] 26.5 parts of ethylene glycol

[0052] 42.2 parts of methyl oleate

[0053] Emulsifier: 3.2 parts Span 85, 1.6 parts Tween 60 (total 4.8 parts)

[0054] Preparation:

[0055] (1) Take each raw material according to the above-mentioned parts by weight;

[0056] (2) Stir and dissolve the ethylene glycol and distilled water taken by weighing;

[0057] (3) The emulsifier and methyl oleate taken by weighing are stirred and dissolved in another 200mL beaker;

[0058] (4) Mix the raw material liquid prepared in step (2) with the raw material liquid prepared in step (3) with the emulsifying shearing machine turned on at a rotational speed of 10,000 to 15,000 rpm, and then continue shearing and emulsifying for 5 minutes to obtain a milky white solution.

Embodiment 2～9

[0060] The preparation method is the same as in Example 1, and the amounts of each material are shown in the table below.

[0061]

Embodiment 10

[0063] 26.5 parts of glycerol

[0064] 26.5 parts of distilled water

[0065] 42.2 parts of chloromethyl oleate

[0066] Emulsifier: 1.5 parts Span 85, 3.3 parts Tween 80 (total 4.8 parts)

[0067] Preparation:

[0068] (1) Take each raw material according to the above parts by weight and place it in a 200mL beaker;

[0069] (2) Emulsify and shear the raw material solution in step (1) for 240 minutes with an emulsifier at a rotational speed of 8000-9000 rpm to obtain a milky white solution.

[0070] Performance evaluation:

[0071] 1. Stability performance evaluation

[0072] Measure 100mL of sample and place it in a 100mL colorimetric tube, and observe its stability at room temperature. The result is as follows:

[0073]

[0074] 2. Lubrication performance evaluation

[0075] (1) Determination of lubrication coefficient in fresh water bentonite slurry

[0076] Prepare 2 parts of 3% fresh water base slurry: add 9g of sodium bentonite for drilling fluid test to each...

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PUM

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Abstract

The invention discloses a water-base lubricant for drilling fluid. The water-base lubricant comprises the following raw materials by part by weight: 7-80 parts of water, 0-72 parts of polyatomic alcohol, 6-64 parts of vegetable fat and 1-19 parts of emulsifying agent. The invention further discloses a preparation method and application of the water-base lubricant. The water-base lubricant is a biologically-gradable environment-friendly water-based lubricant; and when the water-base lubricant is applied to water-based drilling fluid, the wear resistance and the torque of a drilling tool can be remarkably reduced and the lubricating property of the drilling fluid is improved.

Description

technical field [0001] The invention relates to a lubricant and a preparation method thereof, more specifically, to a water-based lubricant for drilling fluid, a preparation method and application thereof. Background technique [0002] Drilling fluid refers to the general name of various circulating fluids that meet the needs of drilling work with its multi-functionality in the process of oil and gas drilling, commonly known as "mud". The basic functions of drilling fluid are: (1) carrying and suspending cuttings; (2) stabilizing the well wall and balancing formation pressure; (3) cooling and lubricating the drill bit; (4) transmitting hydrodynamic force. [0003] According to the base fluid used to prepare drilling fluid, drilling fluid can be divided into water-based drilling fluid and oil-based drilling fluid. [0004] The lubricating performance of drilling fluid has a great influence on drilling work. Especially in drilling deep wells, directional wells, horizontal we...

Claims

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Application Information

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IPC IPC(8): C09K8/035
Inventor 夏小春胡进军王健段连超孙强耿铁冀腾项涛
Owner CHINA NAT OFFSHORE OIL CORP
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