Microemulsion friction and resistance reducing agent for water-based drilling fluid

A water-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, wear, etc., to reduce wear and compatibility. Good, prevent dragging effect

Active Publication Date: 2021-10-12
SINOPEC NANJING RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the existing water-based drilling fluid in the long horizontal well drilling process of large friction, drag pressure, sticking and wear of drilling tools Serious, corrosion problems, provide a water-based drilling fluid microemulsion type friction reducing agent to solve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Taking the percentage by weight as 100%, add 20% triethanolamine monoester oleate, 5% isopropanol, 1% oil-soluble extreme pressure antiwear agent, 2% zinc dialkyldithiophosphate, Add 1% 2,5-bis(alkyldithio)3,4-thiadiazole into water, stir evenly, and it will be a microemulsion type anti-friction and friction reducing agent for water-based drilling fluid.

Embodiment 2

[0028] Taking the percentage by weight as 100%, add 40% triethanolamine monoester oleate, 15% isopropanol, 8% oil-soluble extreme pressure antiwear agent, 10% zinc dialkyl dithiophosphate, Add 3% 2,5-bis(alkyldithio)3,4-thiadiazole into water and stir evenly to get the microemulsion type friction reducing agent for water-based drilling fluid.

Embodiment 3

[0030] Taking the percentage by weight as 100%, add 30% triethanolamine oleic acid soap, 15% n-butanol, 5% oil-soluble extreme pressure antiwear agent, 8% zinc dialkyldithiocarbamate to the reactor , 3% 2,5-bis(alkyl dithio) 3,4-thiadiazole is added into water, and stirred evenly, it is a microemulsion friction reducing agent for water-based drilling fluid.

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Abstract

The invention relates to a microemulsion friction and resistance reducing agent for a water-based drilling fluid. The microemulsion friction and resistance reducing agent for the water-based drilling fluid comprises the following components in percentage by weight: 20%-40% of a main surfactant, 5%-15% of a cosurfactant, 1%-8% of an oil-soluble extreme pressure anti-wear agent, 2%-10% of an oil-soluble corrosion inhibitor, 1%-3% of a metal deactivator and the balance of water. The friction and resistance reducing agent disclosed by the invention has good lubricating, friction reducing and wear resisting effects, and can be applied to drilling operation of large-displacement horizontal wells, directional wells and complex structural wells.

Description

technical field [0001] The invention relates to a microemulsion friction reducing agent for water-based drilling fluid. The microemulsion friction reducing agent 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 develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/22
CPCC09K8/22C09K2208/02C09K2208/34C09K2208/32
Inventor 封心领王康袁俊秀徐冬梅
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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