Other

Petrochina Company Limited

Sichuan Shengnuo Oil. and Gas Engineering Technology Service Co., Ltd

Chenggang Yu

Jian Yang

Xiaodong Liu

Xue Kang Li

Xin Wen

Kui Li

Huiyun Ma

Jun Xie

Yuan Jiang

Kunsheng Wang

Tiemei Shao

Yukun Fu

Dezheng Yi

Yanyan Liu

Pei Liu

Haifeng Zhong

Qiang Yin

Zhan Jiao

Haigang Lu

Shengjun An

Yunyu Chen

Liangyuan Hu

Xiqing Chai

Haimin Xu

A downhole throttling device based on wireless control includes an inlet nozzle, a throttling assembly, an electrical sealing cylinder, a gas guide cylinder, a lower adapter sleeve, an end socket, a female sleeve, and electrical components. The inlet nozzle is connected to the throttling assembly, the throttling assembly is connected to the electrical sealing cylinder and the gas guide cylinder, the electrical sealing cylinder and the gas guide cylinder are both connected to the lower adapter sleeve, the lower adapter sleeve is respectively connected to the end socket and the female sleeve, and the electrical components are arranged in the electrical sealing cylinder. A throttling effect is achieved by detecting the temperature and pressure in a tube by a temperature/pressure sensor in the electrical components and controlling a motor to rotate a movable valve in the throttling assembly by a circuit control assembly, thereby achieving wireless control over downhole throttling.

Downhole throttling device based on wireless control

A seed-specific expression vector and its construction methods and applications are disclosed. A fusion protein expression cassette consisting ofoleosin gene-apolipopoprotein A-I(A-IM) gene driven byoleosin gene promoter is inserted between the HindIII and SacI sites of a plant binary expression vector pBI121, obtaining the plant expression vector pBINOA of the invention. In addition, a method for producing apolipoprotein A-Iis provided, in which the expression vector is used to transform oil sunflower which is used as a plant bioreactor. The method can not only improve the yield of apolipoprotein A-I, but also greatly reduce production costs, and is suitable for industrial production.

Seed-specific expression vector and its construction methods and applications

Growing community of inventors

Beijing, China

Chenggang Yu