Method and apparatus to stablize an offshore platform
This patent describes a column-stabilized floating platform for utilization in deep water, offshore hydrocarbon exploration and production, above a selected portion of a seafloor. It comprises: a floating platform having at least one column which is at least partially hollow to provide positive buoyancy, the column supporting at least one above-surface deck; a stabilizer connected to and suspended a substantial distance beneath the floating platform by a plurality of suspension tendons. The stabilizer has sufficient submerged weight to maintain the suspension tendons in tension and a sufficient added mass, produced by the submerged weight plus resistance to motion of a portion of the water surrounding the stabilizer, to satisfactorily control first order wave-induced heave, pitch, roll, surge and sway motions of the floating platform without the need for anchoring the platform to sid seafloor.
- Assignee:
- Conoco Inc., Ponca City, OK (USA)
- Patent Number(s):
- US 4938630; A
- Application Number:
- PPN: US s 7-235136
- OSTI ID:
- 6557536
- Country of Publication:
- United States
- Language:
- English
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