Dual string elevators

Details Dual string elevators Dual string elevators

1980-06-02

1982-10-19

Cherry, Johnny D.

Handling: hand and hoist-line implements

Grapple

Socket and slip wedge

24263CA, 294 90, E21B 1907

Patent

active

043547060

ABSTRACT:
A dual string elevator having a body with a pair of tapered bowls extending vertically therethrough, lifting projections extending outward from the body in positions aligned with the bowls to prevent bending of a string supported in one of the bowls, a set of gripping slips for each bowl, an actuator for each set of gripping slips, each actuator being mounted in a recess in the body aligned with and spaced outward from the bowls and pivotal links for connecting the actuators to their set of gripping slips whereby the slips are moved out of the bowls and lowered into the bowls into pipe gripping position responsive to the movement of the actuators.

REFERENCES:
patent: 1762037 (1930-06-01), Taylor
patent: 2298507 (1942-10-01), Penick et al.
patent: 3149391 (1964-09-01), Boster
patent: 3154146 (1964-10-01), Brown
patent: 3188708 (1965-06-01), O'Haver
patent: 3197835 (1965-08-01), Brown
patent: 3287776 (1966-11-01), Brown
patent: 3330354 (1967-07-01), Chamblee
patent: 3976132 (1976-08-01), Harper

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