Other

China National Petroleum Corporation

Cnpc Drilling Research Institute

Beijing Petroleum Machinery Factory

Guanghua Liu

Chen Wang

Chunhua Zhang

Yanfu Huang

Yilong Xue

Tiejun Li

Zhangjian Li

Lianyang Zou

Hongjiang Shi

Qian Shi

Xinli Liu

Chengqin Sun

Guoxing Yan

Shikai Tao

Zhiyong Zhou

Xingming Pan

Wenjing Yang

Qingkui Wu

An information transmission apparatus for logging while drilling comprises a hollow drilling rod and at least one cable. The drilling rod comprises at least one first drilling rod member and at least one second drilling rod member spliced to each other alternately. The first drilling rod member comprises a through hole, and the second drilling rod member comprises a stepped hole. The cable comprises a fixed end, a connected end, and a folded portion connect the fixed end to the connected end. Each of the cables is fixed in the stepped hole through a fixed end or is connected to a connected end of an adjacent cable. The connected end may be stretched along the stepped hole, and stretched through the through hole to be electrically connected to a logging instrument or a fixed end of the adjacent cable. The apparatus provides protection for a cable through a hollow drilling rod, thereby improving the transmission reliability.

Information transmission apparatus for logging while drilling

The present invention relates to new use of medulliadrenal chromaffin cells or opioid-peptidergic cells, in particular to their use for treating and/or relieving withdrawal syndrome resulting from drug addiction or drug abuse.

Use of medulliadrenal chromaffin cells or peptide functional cells

Growing community of inventors

Beijing, China

Guanghua Liu