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Biodegradable lubricant for drilling fluid and preparation method thereof

A technology of biodegradation and drilling fluid, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problem that mineral lubricants and biodegradable lubricants cannot meet the requirements of high-inclination, extended-reach directional wells and offshore directional well drilling Technical development requirements and other issues to achieve the effects of reducing drilling production costs, enhancing lubrication performance, and stable performance

Active Publication Date: 2015-01-14
CNPC XIBU DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a biodegradable lubricant for drilling fluid and a preparation method thereof, which overcomes the deficiencies of the prior art and can effectively solve the problem that the existing mineral lubricants and biodegradable lubricants cannot meet the requirements of large inclination and large displacement. Development Requirements of Downhole and Offshore Directional Drilling Technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, the biodegradable lubricant for drilling fluid contains 70 to 90 parts of raw material oil, 8 to 15 parts of low carbon alcohol, 0.5 to 3 parts of catalyst, and 3 to 15 parts of surfactant in parts by weight.

Embodiment 2

[0020] Example 2, the biodegradable lubricant for drilling fluid contains 70 parts by weight of raw oil, 8 parts of low-carbon alcohol, 0.5 parts of catalyst, and 3 parts of surfactant.

Embodiment 3

[0021] Example 3, the biodegradable lubricant for drilling fluid contains 90 parts by weight of raw oil, 15 parts of low-carbon alcohol, 3 parts of catalyst, and 15 parts of surfactant.

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PUM

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Abstract

The invention relates to the technical field of a lubricant for petroleum drilling fluid, in particular to a biodegradable lubricant for the drilling fluid and a preparation method thereof. The biodegradable lubricant for the drilling fluid comprises the following components in part by weight: 70 parts to 90 parts of raw oil, 8 parts to 15 parts of lower alcohol, 0.5 part to 3 parts of catalyst and 3 parts to 15 parts of surfactant. The preparation method of the biodegradable lubricant for the drilling fluid is carried out according to the following step of: 1, adding the raw oil, the lower alcohol and the catalyst into a reactor to perform transesterification and reflux reaction for 2 hours to 5 hours at temperature of 40 DEG C to 90 DEG C. According to the invention, by the coordinative use of the raw oil, the lower alcohol, the catalyst and the surfactant, the aim of strengthening the lubricating performance of the drilling fluid is fulfilled; and the biodegradable lubricant has the advantages of stable performance, good low temperature fluidity, no toxicity, easiness for biodegradation and low pollution to the environment; the drill-jamming accident is reduced; and the drilling production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of lubricants for petroleum drilling fluids, and relates to a biodegradable lubricant for drilling fluids and a preparation method thereof. Background technique [0002] Drilling fluid is a working fluid that can carry cuttings, cool and lubricate drill bits, balance formation pressure, protect wellbore stability and protect oil layers from damage during drilling. Its performance directly affects drilling efficiency and downhole safety. And cost control is an important part of drilling engineering technology. [0003] Drilling fluid lubricant is an important chemical treatment agent for drilling fluid. Its function is to improve the lubricity of drilling fluid, reduce the friction between the well wall and drilling tools, reduce the rotation torque of the drill string and the resistance to tripping, thereby reducing sticking. drilling accidents. In recent years, due to the development of drilling technolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03C09K8/035
Inventor 黄治中魏云郑义平王凤军乔东宇
Owner CNPC XIBU DRILLING ENG