| 摘要 |
A high torque and high capacity rotatable center core and floatable sealed body apparatus with universal ram applications. The apparatus includes a central core assembly, connected between a swivel on its upper end and the work string below, with the central core assembly having a central passageway therethrough. The apparatus further includes a first outer assembly, having a central bore for slidably engagement around a portion of the central core assembly. In one embodiment, a second outer assembly is included, with the second outer assembly having a central bore for slidably engaging around a portion of the central core assembly above the first outer assembly. A pair of opposing transverse bores is contained within both of the first and second outer assemblies, corresponding to a pair of transverse bores in the central core assembly. The apparatus further includes sleeve members for aligning the bores of the central core assembly and the first and second outer assemblies; and rams positional in the transverse bores in the first and second outer assemblies for sealing off the passageway in the central core assembly when moved to the sealing position. A method of sealing a work string on a drill rig is also disclosed.
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