Jacking mechanism supported by a wellhead

Details Jacking mechanism supported by a wellhead Jacking mechanism supported by a wellhead

1983-09-15

1984-10-16

Novosad, Stephen J.

Wells

Processes

Placing or shifting well part

166 77, 175171, 254 29R, E21B 1906

Patent

active

044769369

ABSTRACT:
Jacking mechanism for moving a string of casing or other well pipe vertically within a well and including two units operable to releasably engage and support the pipe, power actuated mechanism for moving one of the units upwardly and downwardly relative to the other to jack the pipe vertically through a wellhead structure, and apparatus for supporting the power actuated mechanism and units at least in part from that wellhead structure.

REFERENCES:
patent: 1121718 (1914-12-01), Derby et al.
patent: 1586923 (1926-06-01), Townsend
patent: 1879929 (1932-09-01), Fortune
patent: 1895132 (1933-01-01), Minor
patent: 1904256 (1933-04-01), Sheldon
patent: 2188589 (1940-01-01), Armentrout
patent: 2638324 (1953-05-01), Ball et al.
patent: 3257099 (1966-06-01), Merritt, Jr.
patent: 3282357 (1966-11-01), Bunn
patent: 3722603 (1973-03-01), Brown
patent: 3797570 (1974-03-01), Leutwyler
patent: 3888318 (1975-06-01), Brown
patent: 3949883 (1976-04-01), Crooke et al.
"New Easing Tools may Eliminate Need for Super Rigo", by Abbott et al., Oil & Gas Journal--Jul. 21, 1980.
World Oil, Oct. 1980, pp. 80 and 81.
Article entitle "Look, They're Snubbing When They Aren't Even in Trouble", Drilling--DCW, Apr. 20, 1977.

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