Buckles – buttons – clasps – etc. – Strap-end-attaching devices – Buckle connected
Patent
1980-02-19
1982-06-01
Frazier, Roy D.
Buckles, buttons, clasps, etc.
Strap-end-attaching devices
Buckle connected
F16I 700
Patent
active
043320627
ABSTRACT:
A well bowl has an opening extending through the bowl, at least a portion of which is formed in the shape of a pyramidal frustum. A plurality of slips are movable along the pyramidal surfaces and together define an inner opening, the slip surfaces which define the inner opening being adapted to engage and hold the outer surface of a length of drill pipe when the slips are moved toward the smaller end of the bowl opening. The slips are disengaged from the drill pipe when they are moved away from the smaller end of the bowl opening and have outer surfaces shaped to engage at least a portion of the surfaces which define the bowl opening when the slips move between their engaging and disengaging positions. The slips are guided along the surfaces which define the bowl for maintaining the slip surfaces which engage the pipe oriented in their pipe engaging positions when they move along the bowl surfaces.
REFERENCES:
patent: 1400701 (1921-12-01), Vreeland
patent: 1810106 (1931-06-01), Johansen
patent: 2071637 (1937-02-01), Laurent
patent: 2127108 (1938-08-01), Driscoll
patent: 2153770 (1939-04-01), Nixon
patent: 2217072 (1940-10-01), Nixon
patent: 2347922 (1944-05-01), Nelson
patent: 2527954 (1950-10-01), Nixon
patent: 3579752 (1971-05-01), Brown
Cavins Company Publication, "Spider for Casing-Tubing and Drill Pipe".
Joy Oil Tools Publication.
B. J. Company Publication.
Hydarig 225 Bowl Print.
Aschenbrenner Peter A.
Bowen Tools, Inc.
Frazier Roy D.
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