Well slip assembly

Details Well slip assembly Well slip assembly

1979-02-14

1981-03-03

Frazier, Roy D.

Buckles, buttons, clasps, etc.

Strap-end-attaching devices

Buckle connected

294102A, E44B 2100, E21B 304

Patent

active

042532191

ABSTRACT:
A well slip assembly including a support structure adapted to be placed on a well drilling rotary table and to turn therewith, a vertically movable slip suspending carrier structure, latch means for releasably retaining the carrier structure and slips in a lower active position relative to the support structure, and yielding means urging the carrier structure upwardly to a retracted position. The support structure is desirably formed separately from a slip bowl structure positionable in the rotary table. The carrier structure may be urged upwardly by fluid pressure type spring means, such as air springs, with an accumulator chamber for the pressure fluid system preferably being contained in or carried by the vertically movable slip carrier structure.

REFERENCES:
patent: 2151208 (1939-03-01), Hiniker
patent: 2189244 (1940-02-01), Gilbert
patent: 2245592 (1941-06-01), Jones, Jr.
patent: 2340597 (1944-02-01), Kelley
patent: 2570039 (1951-10-01), Stone
patent: 2607098 (1952-08-01), Wilson
patent: 2641816 (1953-06-01), Liljestrand
patent: 2662737 (1953-12-01), Eorlberg
patent: 2939683 (1960-06-01), Spiri
patent: 3210821 (1965-10-01), Spiri et al.
patent: 3270389 (1966-09-01), Kingsbury
patent: 3475605 (1969-07-01), Kingsbury et al.
patent: 3742562 (1973-07-01), Haby
patent: 3961399 (1976-06-01), Boyadjieff

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