Drilling rig elevator safety system

Details Drilling rig elevator safety system Drilling rig elevator safety system

2005-11-29

2005-11-29

Bagnell, David (Department: 3672)

Wells

Above ground apparatus

With means facilitating connecting or disconnecting...

C166S066000

Reexamination Certificate

active

06968895

ABSTRACT:
The apparatus is connected to a member on the elevator that moves if and when the slips move between the open and closed positions. The member is locked in a preselected position that attends the position of the slips when the elevator is considered safe. When the member is in that safe position a wireless signal is generated by the apparatus part on the elevator and received by a receiving part of the apparatus in a convenient remote location such as the drillers position. In response to the received signal, the receiving part produces a visible signal to indicate that the slips are in the preselected position.

REFERENCES:
patent: 4511168 (1985-04-01), Haynes
patent: 4579379 (1986-04-01), Berg
patent: 4878705 (1989-11-01), Arnquist
patent: 5791410 (1998-08-01), Castille et al.
patent: 5909768 (1999-06-01), Castille et al.
patent: 6386282 (2002-05-01), Jansch
patent: 6742596 (2004-06-01), Haugen

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