| 摘要 |
<p>The invention provides a reduced downtime maintenance apparatus and method for replacing and/or repairing a subassembly in sealing equipment. It allows the removal of rotating portions (136, 138) of a rotary drilling head (114) without removal of non-rotating portions (132, 134). The reduction in size allows an efficient repair and/or replacement of a principal wear component such as packers. The packer (138) in a rotary drilling head can be removed independent of bearings and other portions of the rotary drilling head. Because of the relatively small size and light weight, the packer can be removed without having to use a crane to lift a rotary BOP and without disassembling portions of the drilling platform. The packer can be removed with the drill pipe without additional equipment. The packer can be removed remotely without necessitating manual disengagement needed below the platform. The invention provides a fluid actuated system to maintain a pre-load system on the bearing.</p> |
