| 摘要 |
<p>Apparatus for use with a drilling rig having a derrick mounted over a bore hole including support means (29,89,121) to support an upper section of pipe (49) in a generally upright position offset from the axis of said bore hole; second support means (120) to position a lower section of pipe in a generally upright and end to end relationship with said upper section; and means (33-36) offset from said axis for coupling said sections of pipe to form a pipe stand and for subsequently uncoupling such sections to break down the stand.</p> |
