Yangtze University

Jingzhou Jiahua Technology Co., Ltd.

Cnpc Research Institute of Safety and Environmental Technology Co., Ltd.

Cnooc China Limited, Zhanjiang Branch, Guangdong

Fuchang You

Mingbiao Xu

Shusheng Zhou

Kai Jiao

Shanshan Hou

Jiao Wu

Yanjun Li

Zhong Li

Hexing Liu

Shanshan Zhou

Xingchun Li

Man Shu

Provided are a polymer viscosity reducer for a water-based drilling fluid and a preparation method thereof. The polymer viscosity reducer for the water-based drilling fluid is prepared from raw materials including, in parts by mass: 100 parts to 150 parts of water, 30 parts to 50 parts of acrylic acid, 10 parts to 20 parts of maleic anhydride, 40 parts to 60 parts of allyl polyethylene glycol, 3 parts to 6 parts of an initiator, 1 part to 3 parts of a pH regulator, 10 parts to 20 parts of a diamine, and 5 parts to 10 parts of a saturated organic acid.

Polymer viscosity reducer for water-based drilling fluid and preparation method thereof

Provided are an asphalt-like material and a method and use thereof as a plugging agent, and a water-based drilling fluid. The asphalt-like material has a structure shown in formula I, wherein, in the formula I, Ris selected from the group consisting of —H, —COOH, and —CH—COOH; Ris selected from the group consisting of —NH—CH—CH—OH, —NH—CH—CH—NH, —N—(CH—CH—OH), and —NH—CH—CH—CH—OH; Ris selected from the group consisting of —OH, —NH—CH—CH—OH, —NH—CH—CH—NH, —N—(CH—CH—OH), and —NH—CH—CH—CH—OH; Ris selected from the group consisting of —NH—CH—CH—OH, —NH—CH—CH—NH, —N—(CH—CH—OH), and —NH—CH—CH—CH—OH; and n is 370 to 400.

Asphalt-like material and preparation method and use thereof as plugging agent, and water-based drilling fluid

Provided are a quaternary ammonium salt and a preparation method and use thereof as an inhibitor, and a water-based drilling fluid and use thereof. The quaternary ammonium salt has a structure shown in formula I, wherein, in the formula I, Ris selected from the group consisting of &#x2014;H and &#x2014;COOH; Ris selected from the group consisting of &#x2014;H and &#x2014;CH&#x2014;COOH; Ris selected from the group consisting of &#x2014;NH&#x2014;CH&#x2014;CH&#x2014;CH&#x2014;NH, &#x2014;NH&#x2014;CH&#x2014;CH&#x2014;NH, &#x2014;NH&#x2014;CH&#x2014;CH&#x2014;OH, &#x2014;O&#x2014;CH&#x2014;CH&#x2014;NH, &#x2014;N&#x2014;(CH&#x2014;CH&#x2014;OH), and &#x2014;O&#x2014;CH&#x2014;CH&#x2014;NH&#x2014;CH&#x2014;CH&#x2014;OH; and n and m are independently 10 to 15.

Quaternary ammonium salt and preparation method and use thereof as inhibitor, and water-based drilling fluid and use thereof

Provided are a polyaspartic acid derivative and a preparation method and use thereof as a lubricant, and a water-based drilling fluid and use thereof. The polyaspartic acid derivative has a structure shown in formula I, wherein, in the formula I, Ris selected from the group consisting of &#x2014;CH&#x2014;CH&#x2014;CH&#x2014;, &#x2014;CH&#x2014;CH&#x2014;CH&#x2014;CH&#x2014;, and &#x2014;CH&#x2014;CH&#x2014;CH&#x2014;CH&#x2014;CH&#x2014;CH&#x2014;; Ris selected from the group consisting of &#x2014;OH, &#x2014;N&#x2014;(CH&#x2014;CH&#x2014;OH), &#x2014;O&#x2014;CH&#x2014;CH&#x2014;NH&#x2014;CH&#x2014;CH&#x2014;OH, &#x2014;NH&#x2014;CH&#x2014;CH&#x2014;OH, and &#x2014;O&#x2014;CH&#x2014;CH&#x2014;NH; and n and m are independently 8 to 17.

Polyaspartic acid derivative and preparation method and use thereof as lubricant, and water-based drilling fluid and use thereof

This pertains to the technical field of lubricants, and particularly relates to a composition for preparing a wear-resistant drilling fluid lubricant, a preparation method of the wear-resistant drilling fluid lubricant and a drilling fluid. Vegetable oil, nanometer calcium borate, an ether compound and an amine compound may be used as raw materials to prepare drilling fluid lubricant with excellent abrasion resistance by reasonably controlling dosages of the raw materials. The lubricant provided can improve wear resistance, lubricating property, and high temperature resistance of bentonite slurry and water-based drilling fluid.

Composition for preparing anti-wear lubricant for drilling fluid and preparation method of anti-wear lubricant for drilling fluid and drilling fluid

A water-based drilling fluid for deepwater drilling includes 0.1%-1.0% by weight of a viscosifier, 0.1%-1.0% by weight of an acidity regulator, 0.5%-3.5% by weight of a filtrate loss reducer, 0.5%-1.5% by weight of a low-temperature yield point enhancer, 1.0%-5.0% by weight of a shale inhibitor, 15%-25% by weight of a hydrate inhibitor, 1.0%-3.0% by weight of a lubricant, 5.0%-10.0% by weight of a temporary plugging agent and seawater.

Water-based drilling fluids for deepwater drilling and use thereof

A sulfur- and phosphorus-free extreme pressure lubricant and a preparation method thereof is disclosed. The lubricant is prepared by using Turkey red oil, a cyclic anhydride compound, triethanolamine, nano polytetrafluoroethylene powder, an alcohol compound, and water as raw materials. The lubricant does not contain hazardous substances such as sulfur and phosphorus. This reduces the harm to the environment, equipment, and human body, and conforms to the development trend of modern industrial production. Moreover, the lubricant has excellent extreme pressure performance, and can effectively reduce the downhole friction and torque, thereby meeting the construction requirements of extended reach wells and horizontal wells.

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Jingzhou, China

Fuchang You