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Drilling slurry additive

A drilling mud and additive technology, which is applied to drilling compositions, chemical instruments and methods, etc., can solve the problems of viscosity deterioration, inability to obtain performance, and fluidity decline, and achieve high heat resistance and mechanical shear resistance. Low environmental adverse effects and high pseudoplastic fluidity

Active Publication Date: 2016-04-13
DAI ICHI KOGYO SEIYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Existing drilling mud conditioners have the following problems. When the viscosity is increased to enhance water retention, the fluidity is reduced, and the viscosity is deteriorated due to high temperature in the ground and mechanical shear of the excavation blade, and sufficient performance cannot be obtained

Method used

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  • Drilling slurry additive

Examples

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Embodiment

[0073] Next, Examples and Comparative Examples are described. However, the present invention is not limited to these Examples. "%" in the examples means % based on mass unless otherwise specified.

[0074] [production of cellulose fiber]

[0075] [Manufacture of Cellulose Fiber A1 (used in Examples)]

[0076] 50 g of bleached softwood kraft pulp (NBKP) was dispersed in 4950 g of water to prepare a dispersion having a pulp concentration of 1% by mass. The dispersion was treated 30 times with Cerendipiter MKCA6-3 (manufactured by Masuko Sangyo Co., Ltd.) to obtain cellulose fibers A1.

[0077] [Manufacture of Cellulose Fiber A2 (used in Examples)]

[0078] Add 150ml of water, 0.25g of sodium bromide and 0.025g of TEMPO to 2g of softwood pulp, fully stir and disperse, then add 13wt% sodium hypochlorite aqueous solution (co-oxidant) wherein, make the amount of sodium hypochlorite be 5.2mmol with respect to 1.0g pulp / g to initiate the reaction. Since the pH decreased as the ...

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Abstract

The purpose of the present invention is to provide a drilling slurry additive for use in drilling for petroleum or natural gas or in engineering projects or mining, having high heat resistance and mechanical shear resistance such that viscosity is undegraded under conditions of high temperature and high shear; moreover having high pseudoplastic flow properties, thereby affording high fluidity when discharged; and, being naturally derived, also being highly biodegradable, and having low environmental impact. This drilling slurry additive contains cellulose fibers having a number-average fiber diameter of 2-500 nm, a fiber aspect ratio of 50 or above, and a cellulose type I crystal structure.

Description

technical field [0001] The present invention relates to a novel additive for drilling mud used in the drilling of oil, gas, civil engineering, mines and the like. More precisely, the present invention relates to an additive for drilling mud, which has high heat resistance and high mechanical shear resistance, and whose viscosity does not deteriorate even under high temperature and high shear conditions; pseudoplastic flow of the additive high fluidity at the time of discharge; and the additive is of natural origin, so it is highly biodegradable and has little adverse effect on the environment. Background technique [0002] In the drilling of crude oil, natural gas, civil engineering, mines, etc., the drilling mud conditioner is used. Drilling mud conditioners are required to impart proper lubricity to the mud when the excavation blades are in contact with the ground, thereby reducing the load on the excavator, as well as impart high fluidity to the mud so that excavation de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/10C09K8/24
CPCC09K8/035C09K2208/08
Inventor 后居洋介佐飞峯雄神野和人野田广司
Owner DAI ICHI KOGYO SEIYAKU CO LTD
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