公开(公告)号：EP2773840A4

公开(公告)日：2016-01-27

申请号：EP12844775

申请日：2012-10-24

申请人： FORUM US INC

发明人： CHILDRESS II LAWRENCE ,  GRANGER JEREMY S

IPC分类号： E21B19/06

CPC分类号： E21B19/06 ,  E21B41/0021 ,  Y10T29/49826 ,  Y10T403/595

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.

摘要翻译： 本发明的实施例涉及用于在用于在油气工业中移动套管，油管，抽油杆或其它循环工具或构件的电梯上的二级安全装置的装置和方法。 在一个实施例中，提供了一种具有主要安全闩锁的用于电梯的次锁闩机构。 辅助闩锁机构包括固定到电梯主体的基部和可移动地固定到基部的手柄和通过偏置构件的第一齿轮装置，其中手柄可移动到接近于第一位置的第一位置 主安全闩锁和与主安全闩锁间隔开的第二位置。