| 摘要 |
Embodiments of the invention relate to apparatus and methods for a secondary safety device for use on elevators utilized to move casing, tubing, sucker rods, or other circular tools or members in the oil and gas industry. In one embodiment, a secondary latch lock mechanism for an elevator having a primary safety latch is provided. The secondary latch lock mechanism comprises a base portion that is fixed to a body of the elevator, and a handle movably fixed to the base portion and a first gear device by a biasing member, wherein the handle is movable to a first position proximate to the primary safety latch and a second position that is spaced away from the primary safety latch. |
