Styrbart motorsystem med integrert formasjonsevaluerende loggingsmulighet

摘要

Measurement while drilling (MWD) formation evaluation tool mounted on a drill string and disposed between a drill bit and a drill motor, the drill motor for rotating the drill bit comprises housing means having an axial opening therethrough, the housing means having first and second opposed ends with the first end being adapted for connection to the drill bit and the second end being adapted for connection to the drill motor; at least one formation resistivity logging means being supported by the housing means; shaft means disposed within the axial housing of the housing means; the shaft means transmitting rotation from the drill motor to the drill bit, the shaft means having first and second opposed ends with the first end being adapted for connection to the drill bit and the second end being adapted for connection to the drill motor.