Lubricant for well drilling liquid and preparation process thereof

A drilling fluid and lubricant technology, applied in the field of oil drilling, can solve the problems of polluted environment operators, poor lubricating performance, low active ingredients, etc., achieve good water solubility, good lubricating performance, and increase the effect of water loss

Inactive Publication Date: 2011-06-15
CNPC GREATWALL DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the deficiencies of existing lubricants, such as low active ingredients, poor l

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0008] The preparation process of the lubricant for drilling fluids: take the mixture of synthetic fatty acid and polyolamine according to the above mass fraction, mix them together, and then continuously stir the mixture at a temperature of 100℃~120℃, and stir 0.5~ After 2.5 hours, it is divided into a lubricant for drilling fluid. The indexes of lubricants for drilling fluids are shown in the following table:

[0009] project

[0010] The function of the invention is to lubricate the drill bit and the drilling tool, can reduce the friction coefficient between the tool and the well wall, can effectively improve the quality of the mud cake of the water-based drilling fluid, and has the performances of preventing seizure and fluid loss. It is suitable for the preparation of various water-based drilling fluids, especially suitable for various drilling fluid systems and high-density drilling fluid systems constructed at low temperatures.

Example Embodiment

[0011] Example 1:

[0012] Take 80% synthetic fatty acid and 20% alcohol amine mixture, mix them together, stir, the temperature during stirring is 100 ℃, after stirring for 2.5 hours, divide into this product. When the amount of drilling fluid is 1%, the reduction rate of lubrication coefficient is 59%.

Example Embodiment

[0013] Example 2:

[0014] Take a mixture of 85% synthetic fatty acid and 15% alcohol amine, mix them together and stir. The temperature during stirring is 120°C. After stirring for 1.0 hour, the product is divided into batches. When the addition amount in the drilling fluid is 1%, the reduction rate of the lubrication coefficient is 61%.

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PUM

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Abstract

The invention relates to the technical field of oil well drilling, in particular to a lubricant for well drilling liquid and a preparation process thereof. The lubricant for the well drilling liquid comprises synthetic fatty acid and polyhydric alcohol amine mixture, wherein the polyhydric alcohol amine mixture comprises anhydride alcohol and alcohol amine, the weight ratio of the anhydride alcohol to the alcohol amine is 1: 1, the weight percent of the synthetic fatty acid is 80-90%, and the weight percent of the polyhydric alcohol amine mixture is 20-10%. The process for preparing the lubricant for the well drilling liquid comprises the following steps: taking the synthetic fatty acid and the polyhydric alcohol amine mixture by weight percent, mixing the synthetic fatty acid and the polyhydric alcohol amine mixture together, continuously stirring the mixture at the temperature of 100 DEG C-120 DEG C for 0.5-2.5 hours, sub-packaging and preparing the lubricant for the well drilling liquid. The prepared lubricant has no toxicity, no pollution, no corrosion, no fluorescence, good lubrication performance, high-temperature resistance, good compatibility with various polymer processing agents and good water solubility.

Description

Technical field: [0001] The invention relates to the technical field of petroleum drilling, in particular to a lubricant for drilling fluid and a preparation process thereof. Background technique: [0002] The existing lubricants used in oil drilling mostly use chemical synthetic preparations or substitutes (such as white oil, diesel oil, etc.), which have low active ingredients, poor lubricating performance, high cost, pollute the environment and harm operators. There are disadvantages such as toxicity. Invention content: [0003] The technical problem to be solved by the present invention is to provide a lubricant for drilling fluid and its preparation process. The treatment agent has good compatibility and good water solubility. The invention overcomes the disadvantages of low active ingredient, poor lubricating performance, high cost, environmental pollution and toxicity to operators in existing lubricants. [0004] The technical solution adopted by the present inve...

Claims

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Application Information

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IPC IPC(8): C09K8/035
Inventor 刘绪全李燕尹志亮刘芳
Owner CNPC GREATWALL DRILLING ENG
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