摘要:
A telemetry system and method for communicating information axially along a drill string (20) comprised of a drive train (78) supported within a housing (80). The system includes an axial conducting loop (22) formed by the drill string (20) for conducting an axial electrical signal embodying the information between a first axial position (48) and a second axial position (50) in the drill string (20), which axial conducting loop (22) extends between the first (48) and second (50) axial positions. A transmitter (170) transmits information to the axial conducting loop (22). The drive train includes a downhole end (24) which extends from and is located below the housing (80). At least one of the first (48) and second (50) axial positions is located in the downhole end (24). The method includes the step of conducting the axial electrical signal between the first (48) and second (50) axial positions through the axial conducting loop (22) which extends between the first (48) and second (50) axial positions.
摘要:
A telemetry system for communicating information axially along a drill string (24). The system includes an axial conducting loop (22) formed by the drill string for conducting an axial electrical signal embodying the information between a first axial position and a second axial position in the drill string, which axial conducting loop extends between the first and second axial positions. A transmitter (170) transmits information to the axial conducting loop. Further, at least a portion of the drill string between the first and second axial positions comprises an outer axial conductor (54) and an inner axial conductor (52) fixedly connected within the outer axial conductor such that an annular space is defined therebetween and such that the longitudinal axes thereof are substantially coincidental, and wherein at least a portion of the axial conducting loop is comprised of the inner and outer axial conductors. An electrical insulator is disposed within the annular space.
摘要:
A telemetry system for communicating information axially along a drill string (24). The system includes an axial conducting loop (22) formed by the drill string for conducting an axial electrical signal embodying the information between a first axial position and a second axial position in the drill string, which axial conducting loop extends between the first and second axial positions. A transmitter (170) transmits information to the axial conducting loop. Further, at least a portion of the drill string between the first and second axial positions comprises an outer axial conductor (54) and an inner axial conductor (52) fixedly connected within the outer axial conductor such that an annular space is defined therebetween and such that the longitudinal axes thereof are substantially coincidental, and wherein at least a portion of the axial conducting loop is comprised of the inner and outer axial conductors. An electrical insulator is disposed within the annular space.