Southwest Petroleum University

Chengdu Di'ao Pharmaceutical Group Co., Ltd.

Chengdu Homesafe Technology Co., Ltd.

Qiang Zhang

Tao N Zhang

Gao Li

Jianxin Ji

Hao Yu

Na Guo

Taihe Shi

Liangliang Ding

Bogang Li

Hongtao Liu

Tiejun Lin

Xiaowei Yan

Yi Jin

Ying Zhang

Shijie Xiong

Zhanghua Lian

Yongrongn Yang

Hongbin Liu

Guang Qian

Yong He

Wenkang Chen

Yunxiao Zhao

Yi Kang

Fengtian Du

Disclosed herein is a reservoir isolation valve for secondary completion, which includes a shell assembly, a sleeve assembly arranged in the shell assembly, a reset spring arranged between the shell assembly and the sleeve assembly, a movable tube, an inner limit tube, an outer limit tube, an outer bearing socket, an inner bearing socket, a thrust bearing, a ball valve arranged in the sleeve assembly, a stepped shaft fixed on the ball valve, a transmission mechanism configured for connecting the movable tube to the stepped shaft and allowing the stepped shaft to rotate and a startup part.

Reservoir isolation valve for secondary completion

An active kitchen safety monitoring system includes a fire prevention alarm device, a gas safety valve, a multifunctional gateway, a server and a user terminal. The fire prevention alarm device sends temperature data of multiple locations on the kitchen stove and kitchen stove usage safety alarm information, both of which are monitored in real time, to the multifunctional gateway. The gas safety valve sends internal pressure data of the gas pipeline, working state information of the motor valve and gas usage safety alarm information to the multifunctional gateway. The multifunctional gateway sends all of the received data to the user terminal through the server, receives and executes operation instructions from the user terminal. The server stores various data and transmits the operation instructions. Through the user terminal, the user is able to view data information and control the gas safety valve and the multifunctional gateway.

Active kitchen safety monitoring system and control method thereof

A remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling is provided, including a piston speed control system, a motor assembly, a cardan shaft assembly and a transmission shaft assembly which are connected with each other from up to down in sequence. The motor assembly includes air inlets, a cam, air cylinders, pistons, a connecting rod, air outlets, liquid inlets, hydraulic cylinders, liquid check valves, a liquid storage chamber, liquid outlets, a liquid injecting chamber, a liquid injecting hole, an anti-drop cap, a rotor, a stator, and a motor assembly housing. The present invention utilizes the high-pressure gas injected by the gas drilling to drive the pistons to move back and forth at high-speed, so as to drive the incompressible liquid within the driving screw to achieve the self-circulating motion, and the screw rotor is driven to rotate by the liquid.

Remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling

Disclosed is a synthesis method of a compound of formula 1,5-[[2(R)-[1(R)-[3,5-bis(trifluoromethyl)phenyl]ethoxyl]-3(S)-4-fluorophenyl-4-morpholinyl]methyl]-1,2-dihydro-3H-1,2,4-triazole-3-one (i.e. aprepitant), which comprises cyclizing a compound of formula 4 in a solvent, wherein R is C-Calkyl. The intermediate for preparing aprepitant is also disclosed. The present method is especially suitable for industrial production of aprepitant.

Preparation method of 5-[[2(R)-[1(R)-[3,5-bis(trifluoromethyl) phenyl]ethoxy]-3(S)-4-fluorophenyl-4-morpholinyl]methyl]-1,2-dihydro-3H-1,2,4-triazole-3-one

Growing community of inventors

Sichuan, China

Qiang Zhang