Invention Grant
US07137453B2 Remote operated actuator system for drill string internal blowout preventer 有权
用于钻柱内部防喷器的远程操作执行器系统

Remote operated actuator system for drill string internal blowout preventer
Abstract:
An air swivel ring includes a non-rotating member having an air inlet, a rotating member having an air outlet, and a split seal having a first sealing surface and coupled to one of the non-rotating member and the rotating member so that the first sealing surface on the seal is disposed proximate a second sealing surface on the other of the non-rotating member and the rotating member.
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