Disconnectable riser columns for under water oil wells

Details Disconnectable riser columns for under water oil wells Disconnectable riser columns for under water oil wells

1978-07-03

1980-03-25

Leppink, James A.

Wells

Submerged well

Connection or disconnection of submerged members remotely...

285 18, 175 7, 166359, 166367, E21B 712

Patent

active

041945689

ABSTRACT:
A riser column particularly for use in deep water comprises a central tube connectable by its lower end to a submerged installation, for example a well, and including means permitting the central tube to oscillate relative to the installation, and connected at its upper end to a suspension table associated with a surface support, for example a platform, and bearing support means intermediate its ends at a level below that at which waves are effective, and a plurality of satellite tubes arranged around the central tube, each satellite tube having a bottom part extending from the intermediate support means to the submerged installation and a removable top part extending from the support means to suspension table and releasably connected to the bottom part thereof for withdrawal from the column following disconnection of the column from the installation, for example, in the event of a storm.

REFERENCES:
patent: 3189098 (1965-06-01), Haeber
patent: 3280908 (1966-10-01), Todd
patent: 3324943 (1967-06-01), Price
patent: 3332484 (1967-07-01), Watkins
patent: 3373826 (1968-03-01), Ingram
patent: 3380520 (1968-04-01), Pease
patent: 3901538 (1975-08-01), Blakely
patent: 3918379 (1975-11-01), McNary et al.
patent: 3999617 (1976-12-01), Ilfrey et al.
patent: 4098333 (1978-07-01), Wells et al.
patent: 4119145 (1978-10-01), Tuson
patent: 4127005 (1978-11-01), Osborne

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