| 摘要 |
Subsea well arrangement for offshore production of oil or gas, comprising a wellhead (5-8), a christmas tree (10-19) mounted on the wellhead and at least one riser (31-32) for connection with a production vessel at the sea surface. At the top of the christmas tree (10-19) there is provided a swivel device (20) communicating (21, 22) with the christmas tree, and the swivel device is provided with preferably laterally directed connecting members (31A, 32A, 33A) for risers or hoses (31, 32) and for an umbilical or control cable (33).
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