| 摘要 |
A tool (100) circulates drilling fluid through and rotates a pipe string (157) while making up or breaking out a stand of pipe (171). The tool (100) includes a tubular member defining a central bore (101) having an axis (102), wherein the tubular member comprises an upper tubular member (109) and a lower tubular member (111), and wherein the upper tubular member (109) and the lower tubular member (111) are configured to alternately rotate independently and in unison. The tool (100) also includes a central bore valve (131) coupled to the upper member (109), and at least one radial valve (133) coupled to the upper tubular member (109) axially below the central bore valve (131). |
