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Friction-reducing agent for oil-based drilling fluid

An oil-based drilling fluid, a technology for reducing friction and drag, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of stuck drilling tools, large friction resistance, dragging pressure, etc. Simple method and low cost effect

Active Publication Date: 2021-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of the existing oil-based drilling fluid in the process of drilling long horizontal wells, such as large friction, dragging, sticking, and serious wear of drilling tools, and to provide an oil-based drilling fluid with anti-friction Resist to solve the above problems

Method used

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  • Friction-reducing agent for oil-based drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 40g of Group II base oil, 50g of sulfonated castor oil, and 5g of tricresyl phosphate into the reaction kettle in turn, raise the temperature to 35°C, add 5g of monosuccinimide, and stir evenly to obtain a friction reducing agent for oil-based drilling fluid .

Embodiment 2

[0016] Add 50g of Group II base oil, 40g of sulfonated tall oil, and 5g of di-n-butyl phosphite to the reaction kettle in sequence, raise the temperature to 40°C, add 5g of bis-succinimide, and stir evenly to obtain a friction-reducing oil-based drilling fluid. Drag reducer.

Embodiment 3

[0018] Add 60g of Group II base oil, 30g of sulfurized triglycerides, and 5g of tricresyl phosphate into the reaction kettle in sequence, raise the temperature to 45°C, add 5g of polysuccinimide, and stir evenly to obtain friction and drag reduction for oil-based drilling fluids agent.

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Abstract

The invention relates to a friction reducing agent for oil-based drilling fluid, which is composed of: by mass percentage, base oil: 40-70%; performance accelerator: 20-50%; solubilizer: 5-15%; agent 1‑5%. The preparation method is as follows: add base oil to the reactor in sequence: 40-70%; Stir evenly to obtain the friction reducing agent for oil-based drilling fluid. The anti-friction and anti-friction agent of the invention has simple preparation method, convenient operation, and excellent lubricating performance and anti-wear and anti-friction performance.

Description

technical field [0001] The invention relates to a friction reducing agent for oil-based drilling fluid. The friction reducing agent for oil-based drilling fluid prepared by the invention is suitable for the technical field of oil field drilling engineering. Background technique [0002] In recent years, with the increasingly severe energy situation and the rapid growth of energy prices, shale gas resources have received extensive attention. Compared with conventional natural gas, although the production capacity of shale oil and gas is low and the development is difficult, it has a long development life and huge reserves. Shale oil and gas reservoirs are very different from conventional sandstone and carbonate reservoirs, with high adsorption, extremely low permeability, well-developed and easily broken fractures, high clay mineral content, strong water sensitivity, etc. characteristic. At present, the long horizontal well drilling technology is mainly used in the developm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/34
Inventor 封心领王康袁俊秀徐冬梅靳志超
Owner CHINA PETROLEUM & CHEM CORP
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