Southwest Petroleum University

Sichuan University

Chengdu Xinrui Taikang Technology Co., Ltd.

Rui Li

Yuquan Wei

Jian Zhang

Gao Li

Yi Feng

Yijian Chen

Yingfeng Meng

Na Wei

Long He

Long Qing

Lin Li

Sha Liu

Jian Chen

Zhiqiang Lei

Shunhui Yang

Zujun Jiang

Di Zhang

Qi Liu

Xiaofeng Gao

Lijun Luo

Peng Yang

A method for detecting a thickness of bonded rubber of a carbon black in a natural rubber based for reinforcement performance is provided. An ultra-thin frozen microtome to prepare a sample, a tapping mode of the atomic force microscope is used, and when characterizes the carbon black and rubber composite material, the difference of imaging characteristics between morphological and phase diagrams is used, the characteristics of bonded rubber of carbon black reinforced composite material can be observed to obtain the thickness of bonded rubber, and then influence of bonded rubber on rubber performance and the reinforcement performance of the carbon black in the rubber are analyzed. The method has advantages of simple operation, no need for excessive sample processing, high detection efficiency, clear detection images and high detection accuracy, thereby having better applicability and providing a new method and idea for studying reinforcements of fillers.

Method for detecting thickness of bonded rubber of carbon black in natural rubber based for reinforcement performance

A multi-slug staged method for plugging a fractured formation includes: determining an average opening of fractures around a well as D, an average particle size of bridging particles for first-stage plugging as Dthat is slightly less than D, and average particle sizes of plugging particles for second to last-stage plugging as D-D, where Dis small enough to form a tight plugging layer; and sequentially injecting a plugging slurry only containing the bridging particles having the average particle size of D, plugging slurries containing the plugging particles having the average particle sizes of D-D, and a plugging slurry containing the plugging particles having the average particle size of Dinto the fractures to achieve the fractured formation plugging.

Multi-slug staged method for plugging fractured formation

A mineshaft-stratum fracture coupled flowing simulation experiment device includes a simulated mineshaft flowing system, a simulated stratum system, a simulated fracture system and a data acquisition system. The simulated mineshaft flowing system includes simulated mineshaft, simulated drilling rod, drilling fluid storage tank, stirring motor, and drilling fluid screw pump. The simulated drilling rod is located in center of the simulated mineshaft. The stirring motor is provided in the drilling fluid storage tank. The drilling fluid screw pump is connected to an inlet end of the simulated drilling rod through the drilling fluid storage tank. The simulated stratum system includes simulated stratum, clean water storage tank, separation tank, gas storage tank, gas air-compressor, and clean water screw pump. The gas storage tank is connected to the gas air-compressor and is connected to the simulated stratum through a gas pressure regulating valve.

Mineshaft-stratum fracture coupled flowing simulation experiment device and method

The present invention relates to the technical field of chemically synthesized drugs, in particular to an anti-HIV drug or prodrug and preparation method and uses thereof. The compound or prodrug compound of the present invention has a structural formula as represented by formula I. The compounds have anti-HIV-1 and anti-HIV-2 virus activity, and have a C8166 therapeutic index as high as 2081.59 and an H9 therapeutic index as high as 303.03. Furthermore, the compounds have high solubility up to 1290-2845.5 &#x3bc;g/ml in an aqueous solution, and can be formulated into an oral formulation.

Anti-HIV compound and preparation method and use thereof

Growing community of inventors

Chengdu, China

Rui Li