| 摘要 |
<p>An inductive data coupler (10) for use with an MWD downhole tool which extends internally and lengthwise of outer drilling tubulars, said coupler (10) being intended to join together an upstream tool portion (A) to a downstream tool portion (B) and in the region of a connection (15) between two outer drilling tubular portions (11, 12), in which the coupler comprises: a first tubular member (13) for connection to the upstream tool portion (A) and a second tubular member (14) for connection to the downstream tool portion (B), said tubular members being movable lengthwise and rotationally one within the other; and, a first coil (16) provided on one of the tubular members (13, 14), said coils (16, 17) axially overlapping each other in order to transmit data inductively from one coil to the other coil whereby to transmit drilling data to surface.</p> |
