Wells – Submerged well – Connection or disconnection of submerged members remotely...
Patent
1996-07-29
1998-07-14
Schoeppel, Roger J.
Wells
Submerged well
Connection or disconnection of submerged members remotely...
166350, 166367, 166 772, 4052243, 405205, E21B 7132
Patent
active
057789819
ABSTRACT:
The invention relates to a guide arrangement 1 for a riser assembly 10 including a length of a second riser tube 6 running from a well head 2 to a surface vessel 6. First buoys 8 are provided which permit the evacuation and refilling of water to adjust the buoyancy effect and comprise a system to admit a controlled amount air or water and which are connected to the lower end of the riser assembly 10 by a first line 14 via a pulley 16 such that as the first buoys are raised the riser assembly 10 is pulled downwards towards the well head. Second buoys are provided to form a rigid frame work for the guide arrangement 1 when air has replaced the water contained therein. Support buoys 22 are connected to the first and second riser tubes 4, 8 by air line tubes 13 which enable air to be removed from and added to the support buoys 22 to adjust the amount of buoyancy they provide.
REFERENCES:
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patent: 4240506 (1980-12-01), Dareing
patent: 4735267 (1988-04-01), Stevens
patent: 4799827 (1989-01-01), Jaqua
patent: 4906139 (1990-03-01), Chiu et al.
patent: 4995762 (1991-02-01), Goldman
patent: 5069580 (1991-12-01), Herwig et al.
patent: 5671811 (1997-09-01), Head
Dubno Herbert
Kateshov Yuri
Schoeppel Roger J.
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