| 摘要 |
<p>An apparatus for use in drilling or producing from a well bore, the apparatu s comprising a downhole member such as a drilling device or a production device which is capable of being attached to a tubula r such as a drill string, production string or the like, means for rotating a tubular, control means for controlling the rotation of said tubular in order to transmit information along said tubular and means for monitoring the rotation of said tubular and for decoding said information transmitted along said tubular such that a magnitude of a parameter can be determined by the drilling member from the rotation of said tubular. The invention also relates to a method for communicating with a downhole tool using the apparatus.</p> |
