| 摘要 |
<p>A downhole apparatus (10) comprises a substantially tubular body (12) having a throughbore (14) and connection means (16, 18) for coupling the apparatus (10) to adjacent downhole tools. A central portion of the body (12) defines a radially upset portion (20) comprising a number of circumferentially spaced slots or bays (22), each bay (22) communicating with the throughbore (14) and configured to receive a stabiliser blade (24), the stabiliser blades (24) configured in use to move from a first, retracted, configuration to a second, expanded, configuration for engaging a bore wall (B).</p> |
