Self-supported drilling riser
Patent
·
OSTI ID:7311798
Apparatus and methods are described for drilling a well into a submerged bottom from a floating drilling vessel while employing a riser pipe having positive buoyancy is disclosed. The riser pipe extends between the vessel and the well and is comprised of an upper and a lower section. Means are connected to the lower section for imparting a buoyant force to it of sufficient magnitude to render it positively buoyant. Means are provided extending between the submerged bottom and the upper end of the positively buoyant riser section for restraining the lower section against upward movement. The upper section of the riser pipe may be disconnected from the lower section so that the vessel may abandon the well site. The lower riser section is left self-standing, connected to the wellhead. 14 claims, 6 figures.
- Assignee:
- Exxon Production Research Co.
- Patent Number(s):
- US 3999617
- OSTI ID:
- 7311798
- Country of Publication:
- United States
- Language:
- English
Similar Records
Drilling riser braking apparatus and method
Drilling riser locking apparatus and method
Drilling riser locking apparatus and method
Patent
·
Tue Oct 21 00:00:00 EDT 1986
·
OSTI ID:7148540
Drilling riser locking apparatus and method
Patent
·
Tue Oct 08 00:00:00 EDT 1985
·
OSTI ID:5961067
Drilling riser locking apparatus and method
Patent
·
Mon Dec 09 23:00:00 EST 1985
·
OSTI ID:5911271