Riser pipe elevator

Details Riser pipe elevator Riser pipe elevator

1985-02-25

1987-09-08

Spar, Robert J.

Material or article handling

Well pipe or rod racking mechanism

With slope change

211 704, 212213, 414745, E21B 1914

Patent

active

046920811

ABSTRACT:
An elevator for storing and retrieving riser pipe in a semi-submersible unit is disclosed. The riser pipe is stored in a annular caisson below the floor of the semi-submersible unit in surrounding relationship to the drill center of the unit. The annular caisson forms a magazine in which the riser pipe is vertically stored. The riser pipe is moved in and out of the magazine in a telescopic elevator which raises the riser pipe and tilts it so that it moves through the floor of the semi-submersible unit at an angle to the vertical.

REFERENCES:
patent: 2999605 (1961-09-01), Jarnett
patent: 3539024 (1970-11-01), Irons et al.
patent: 3937334 (1976-02-01), Bleyl et al.
patent: 3949693 (1976-04-01), Bauer et al.
patent: 3987910 (1976-10-01), Brunato
patent: 4335792 (1982-06-01), Mahan
patent: 4444275 (1984-04-01), Beynet et al.
patent: 4445579 (1984-05-01), Bello
patent: 4502551 (1985-03-01), Rule et al.

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