发明名称 |
OFFSHORE EXPLORATION OR PRODUCTION OPERATION |
摘要 |
Apparatus for providing an offshore drilling operation in a sea, the apparat us comprising a drilling derrick support structure (2) having a base (4) to res t on the sea-floor (5) and a deck (7) to support a drilling derrick (1), the structure being in the form of a concrete block (2) having a hollow cavity t o enable the block (2) to be floated to the site where drilling is to take pla ce and being adapted to receive ballast into the cavity in such a way and in a sufficient quantity as to cause the block (2) to sink base-first and rest up on the sea-bed with the deck (7) clear of the surface of the sea, a drilling derrick (1) for mounting on the deck (7) of the block (2) and a tender assis t barge (3) for transport to the site in down to 2m of water to provide services, supplies and equipement to the drilling derrick (1).________________________________________________________________________ ___ _______
|
申请公布号 |
CA2208976(C) |
申请公布日期 |
2001.09.04 |
申请号 |
CA19962208976 |
申请日期 |
1996.11.05 |
申请人 |
BONE, DAVID;BRITISH GAS PLC;HEYWOOD, CHRISTOPHER |
发明人 |
BONE, DAVID;HEYWOOD, CHRISTOPHER;HOLLIS, ANDREW PATRICK |
分类号 |
B63B35/44;B63B9/06;E02B17/00;E02B17/02;(IPC1-7):E21B43/01 |
主分类号 |
B63B35/44 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|