| 摘要 |
A welding apparatus for installing a welded barrier element in a tubular conduit, the welding apparatus comprising a longitudinal housing, a welding head at a first end of the housing, the welding head being oriented away from the first end, a rotary drive system for causing relative rotation of the welding head and the housing, a centraliser mechanism extending transversely out of the housing for centralising the welding apparatus within a tubular conduit, and a releasable holder at the first end for selectively holding or releasing a shaft of a barrier element to be welded in the tubular conduit. A method of installing a welded barrier element in a tubular conduit, such as an oil or gas well, or borehole casing, or borehole heat exchanger, for sealing the conduit, is also disclosed. |
