Horseshoe shaped elevator and method for using same

Details Horseshoe shaped elevator and method for using same Horseshoe shaped elevator and method for using same

2006-04-25

2006-04-25

Bagnell, David (Department: 3672)

Wells

Processes

Assembling well part

C166S077520, C294S086310, C294S090000, C294S102200

Reexamination Certificate

active

07032678

ABSTRACT:
A U-shaped elevator having no doors is provided with first and second latching mechanisms which when contacted by the tubular to be entrapped within the elevator move from a closed position to an open position and which then return to a closed position as soon as the tubular is entrapped within the elevator. The latching mechanisms have a safety catch which prevents the tubular from being inadvertently removed from the elevator. The safety latch mechanism can only be activated by a handle which is manipulated by hand by personnel working on the derrick utilizing the elevator. The elevator has an open throat to receive tubulars that have couplers or other features with a lower flange surface for lifting a pipe string. The throat access has blocking members that are movable to allow tubulars to move out of the gap unless the blocking members are locked to prevent such movement. The blocking members have latches biased toward a position to immobilize the members. To allow tubulars to exit the throat, an unlocking mechanism is actuated manually or by motorized means under remote control.

REFERENCES:
patent: 1463648 (1923-07-01), Duley
patent: 4269554 (1981-05-01), Jackson
patent: 6568479 (2003-05-01), Mosing et al.

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