CPC E21B 19/02 (2013.01) [B66D 1/58 (2013.01); E21B 19/08 (2013.01)] | 19 Claims |
1. A winch overload protection system, comprising:
an overload detection unit operable to detect when a load on a winch of a workover system exceeds a safety load limit; and
an overload control unit configured to receive an overload signal from the overload detection unit, and in response thereto disengage a brake on the winch, wherein the overload detection unit includes a pivotable frame for supporting the winch, a pre-loaded anti pivot device coupled to the frame, the pre-loaded anti pivot device configured to hold the frame in a substantially fixed position until the winch exceeds the safety load limit, and a movement sensor for detecting movement of the frame when the winch exceeds the safety load limit.
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