Boring or penetrating the earth – Boring a submerged formation
Reexamination Certificate
2000-08-30
2001-12-04
Tsay, Frank (Department: 3672)
Boring or penetrating the earth
Boring a submerged formation
C175S010000, C166S338000
Reexamination Certificate
active
06325158
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a method for mounting a seabed installation and to a device for implementing the method.
BACKGROUND OF THE INVENTION
In another application submitted simultaneously with this application by the same applicant, there is described a mooring device of the above-mentioned type, which comprises a suction anchor section, a casing and possibly a pile which is arranged for attachment to a seabed formation, the guide boring being provided in the guide pipe. This mooring device can be employed in bottom installations which are lowered and hereby guided by means of guidelines from a drilling platform to the mooring device, as well as in bottom installations which are lowered without the use of such lines.
Moreover, from the applicant's GB 2 285 274 (corresponding to Norwegian application no. 944545) there is known another similar device for a drilling template which is arranged for mounting by means of guidelines. This drilling template is suitable for use only at relatively shallow depths, i.e. depths of up to 500 m, since the use of guidelines at greater depths is associated with difficulties.
SUMMARY OF THE INVENTION
The object of the invention is to provide a device as indicated initially which is suitable for positioning without the use of guidelines, i.e. for positioning at great depths, e.g. at depths of between 500 m and 2500 m.
The characteristics of the device according to the invention are presented in the characteristic clause of the claims.
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patent: 4154552 (1979-05-01), Van Bilderbeek
patent: 4167215 (1979-09-01), Thorne
patent: 4399872 (1983-08-01), McConaughy et al.
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patent: 4893677 (1990-01-01), Brammer et al.
patent: 5722796 (1998-03-01), Halvorsen et al.
patent: 157747 (1988-02-01), None
patent: 944545 (1994-11-01), None
patent: 180758 (1997-03-01), None
patent: 301555 (1997-11-01), None
patent: WO 9606260 A1 (1996-02-01), None
Aston Pete
Backe Morten
Bjøru Gunnar
Rangnes Atle
Kongsberg Offshore A/S
Tsay Frank
Young & Thompson
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