Method and apparatus for running, operating, and retrieving subs

Details Method and apparatus for running, operating, and retrieving subs Method and apparatus for running, operating, and retrieving subs

1975-07-25

1977-01-18

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

166 5, 166120, 166136, 166212, 285141, E21B 2300, E21B 2304

Patent

active

040034348

ABSTRACT:
A method and apparatus for running, operating, and retrieving packoffs, bowl protectors, casing heads, casing hangers, and other well tools employed in drilling and completing subsea wells. Broadly considered, the method involves running the well tool and a special running and retrieving tool to which it is releasably connected into the well by means of a drill or other pipe string and then pressurizing the wellhead through the choke and kill lines to actuate the running and retrieving tool and release it from the well tool for subsequent retrieval and re-use. Various embodiments of the running and retrieving tool are described.

REFERENCES:
patent: 2695064 (1954-11-01), Ragan et al.
patent: 3002561 (1961-10-01), Baker et al.
patent: 3086590 (1963-04-01), Jackson et al.
patent: 3098525 (1963-07-01), Haeber
patent: 3098525 (1963-07-01), Haeber
patent: 3177703 (1965-04-01), Waters et al.
patent: 3223169 (1965-12-01), Roark
patent: 3321217 (1967-05-01), Ahlstone
patent: 3412801 (1968-11-01), Young
patent: 3924678 (1975-12-01), Ahlstone

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