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25. 发明专利

JPH05239984A 失效
公开(公告)号：JPH05239984A
公开(公告)日：1993-09-17
申请号：JP4134792
申请日：1992-02-27
申请人： ISHIKAWAJIMA HARIMA HEAVY IND
发明人： INOUE KENICHI
IPC分类号： E21B43/01 , E21B15/02
摘要： PURPOSE:To enhance the stability by providing a working deck with an opening for carrying in and out large-size apparatus, furnishing a lid on the opening, and locating the deck in a low position. CONSTITUTION:A marine structure 1 is provided with a lower opening 2 which opens to the sea surface, and a working deck 3 is installed in such a way as enclosing the opening 2. The deck 3 is provided with an opening 6 for carrying in and out large-sized apparatus 5. On one side of the deck 3, a lid 7 enclosing the opening 6 is furnished in such a way as rotatable round a hinge 8, and a dolly for opening and shutting the lid 7 is installed on each side in longitudinal direction of the lid 7. When the apparatus 5 is sunk to the sea ground, the dolly is moved and the lid 7 is rotated downward to open the opening 6, and then the apparatus 5 is transported to the opening 6 and connected with the tip of a riser pipe.

27. 发明专利

JPH05106387A METHOD OF INSTALLING CHUTE CONDUCTOR 失效
公开(公告)号：JPH05106387A
公开(公告)日：1993-04-27
申请号：JP27634291
申请日：1991-09-30
申请人： MCDERMOTT INT INC
发明人： DANIERU MEIJIYA HAUZA
IPC分类号： E21B15/02 , E21B33/12 , E21B43/01
摘要： PURPOSE: To make a lighter structure constructible by sinking a winze conductor into the sea by adjusting the buoyancy while the conductor is sealed with a watertight plug and, after the Conductor reaches the sea bottom, boring a hole in the conductor. CONSTITUTION: A watertight plug is inserted into a conductor pipe 16 and the end section of the pipe 16 is sealed. Then a linked conductor pipe 20 is formed by connecting the pipe 16 with another pipe on a derrick barge 10. Thereafter, a plurality of pipes 20 is connected to the linked conductor pipe 20 by hanging the pipes 20 with a derrick crane 14 and, at the same time, built in the guide of a platform 12 and sunk into the sea while the buoyancy is adjusted. After the pipes 20 reach the sea bottom, a hole is bored in the plug.

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