Yangtze University

Jingzhou Jiahua Technology Co., Ltd.

Zhejiang Ocean University

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

Cnooc China Limited, Zhanjiang Branch, Guangdong

Mingbiao Xu

Fuchang You

Kai Jiao

Shusheng Zhou

Shanshan Hou

Jiao Wu

Yanjun Li

Zhong Li

Xijin Xing

Shanshan Zhou

Yue Huang

Xingchun Li

Man Shu

Xiaohe Huang

Li Xu

Hexing Liu

Lin Xu

Yingying Guo

Huanzhi Feng

Lang Wang

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

A method and apparatus for determining the sealability of an oil & gas well sealant fluid, whereby a cylindrical cell assembly capable of withstanding high temperature and high pressure with an electromagnetic heater positioned radially outside the cell body while partly filled with the sealant fluid. A leakage assembly in connection to the cylindrical cell assembly allows the sealant fluid to continuously flow through a leakage element at a desired differential pressure, and the residual fluid is drained into said cell by a cycling pipeline system. The real-time pressure may be recorded and transmitted to a control system including data acquisition and control units so as to monitor and measure the sealability of fluid in the downhole leakage.

Apparatus and method for testing dynamic sealability of fluid in the downhole minor leaks

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.

Sulfur- and phosphorus-free extreme pressure lubricant and preparation method and application thereof

Growing community of inventors

Jingzhou, China

Mingbiao Xu