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 enviro

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

Example Embodiment

[0049] Example 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 of Span 85, 1.6 parts of Tween 60 (total 4.8 parts)

[0054] Preparation:

[0055] (1) Weigh each raw material according to the above weight parts;

[0056] (2) Stir and dissolve the weighed ethylene glycol and distilled water;

[0057] (3) Stir and dissolve the weighed emulsifier and methyl oleate in another 200 mL beaker;

[0058] (4) Mix the raw material liquid prepared in step (2) with the raw material liquid prepared in step (3) under the condition of turning on the emulsifying shearing machine and rotating speed at 10000-15000 rpm, and then continue to shear and emulsify for 5 minutes to obtain a milky white solution.

Example

[0059] Examples 2-9

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

[0061]

Example Embodiment

[0062] Example 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 of Span 85, 3.3 parts of Tween 80 (total 4.8 parts)

[0067] Preparation:

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

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

[0070] Performance evaluation:

[0071] 1. Stability evaluation

[0072] Measure 100mL sample and place it in a 100mL colorimetric tube, and let it stand at room temperature to observe its stability. The results are as follows:

[0073]

[0074] 2. Lubrication performance evaluation

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

[0076] Prepare 2 portions of 3% fresh water base slurry: add 9g of sodium bentonite for drilling fluid te...

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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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