INFORMATION TRANSMISSION APPARATUS FOR LOGGING WHILE DRILLING

摘要

The invention relates to the field of petroleum and natural gas drilling, and particularly, to an information transmission apparatus for logging while drilling. In order to solve the problems that the information transmission speed is too slow, the external interference is obvious and the transmission reliability is poor, the invention provides an information transmission apparatus for logging while drilling which 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 connecting 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.