| 摘要 |
There is provided a wellhead assembly (1) which comprises a production well (2); a first valve (14); process equipment; a transport pipe (4) for transporting fluid away from the wellhead assembly; and piping (3) fluidly connecting the production well to the first valve, process equipment, and the transport pipe. The first valve (14) is located between the production well (2) and the process equipment, and there is a fall in the piping (3) between the first valve and the transport pipe such that when the first valve (14) is closed liquid will drain from the first valve into the transport pipe (4) under the action of gravity. There is also provided a method of draining the wellhead assembly (1), an arrangement for depressurising the wellhead assembly (1) using a service line (46) and a method of depressurising the wellhead assembly(1) |
