Abstract: 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, R1 is selected from the group consisting of —H, —COOH, and —CH2—COOH; R2 is selected from the group consisting of —NH—CH2—CH2—OH, —NH—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —NH—CH2—CH2—CH2—OH; R3 is selected from the group consisting of —OH, —NH—CH2—CH2—OH, —NH—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —NH—CH2—CH2—CH2—OH; R4 is selected from the group consisting of —NH—CH2—CH2—OH, —NH—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —NH—CH2—CH2—CH2—OH; and n is 370 to 400.

Abstract: 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, R1 is selected from the group consisting of —H, —COOH, and —CH2—COOH; R2 is selected from the group consisting of —NH—CH2—CH2—OH, —NH—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —NH—CH2—CH2—CH2—OH; R3 is selected from the group consisting of —OH, —NH—CH2—CH2—OH, —NH—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —NH—CH2—CH2—CH2—OH; R4 is selected from the group consisting of —NH—CH2—CH2—OH, —NH—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —NH—CH2—CH2—CH2—OH; and n is 370 to 400.

Abstract: 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, R1 is selected from the group consisting of —H and —COOH; R2 is selected from the group consisting of —H and —CH2—COOH; R3 is selected from the group consisting of —NH—CH2—CH2—CH2—NH2, —NH—CH2—CH2—NH2, —NH—CH2—CH2—OH, —O—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —O—CH2—CH2—NH—CH2—CH2—OH; and n and m are independently 10 to 15.

Abstract: 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, R1 is selected from the group consisting of —CH2—CH2—CH2—, —CH2—CH2—CH2—CH2—, and —CH2—CH2—CH2—CH2—CH2—CH2—; R2 is selected from the group consisting of —OH, —N—(CH2—CH2—OH)2, —O—CH2—CH2—NH—CH2—CH2—OH, —NH—CH2—CH2—OH, and —O—CH2—CH2—NH2; and n and m are independently 8 to 17.

Abstract: 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.

Abstract: 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 said sealant fluid. A minor-leak assembly in connection to said cylindrical cell assembly allows said sealant fluid to continuously flow through a leak sample 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 to transmitted to a control system comprised of data acquisition and control units so as to monitor and measure the sealability of fluid in the downhole minor leaks.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The present invention 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. The present invention uses vegetable oil, nanometer calcium borate, an ether compound and an amine compound as raw materials and may prepare the drilling fluid lubricant with excellent abrasion resistance by reasonably controlling dosages of the raw materials. The results of the examples show that the lubricant provided by the present invention can improve the wear resistance, the lubricating property and the high temperature resistance of the bentonite slurry and the water-based drilling fluid.

Abstract: The present invention belongs to the field of lubricant technologies, and specifically, to a sulfur-and phosphorus-free extreme pressure lubricant and a preparation method thereof. In the present invention, the lubricant prepared by using Turkey red oil, a cyclic anhydride compound, triethanolamine, nano polytetrafluoroethylene powder, an alcohol compound, and water as raw materials 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.

Abstract: The present application relates to petroleum drilling engineering, and specifically to a water-based drilling fluid for deepwater drilling and uses thereof. The drilling fluid 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. The water-based drilling fluid for deepwater drilling has constant rheological property and protects the reservoir.