Patent ID: 8128332

Claim:
A system for resisting upward movement of an arm of a pipe handling apparatus, the system comprising: a derrick having structural members that form a window therein; a pipe handling system having an arm that rises into the window of the derrick to deliver or receive a tubular held in a vertical orientation; a header having an outside surface configured for attachment to the structure of the derrick, and having the outer surface attached to the structure of the derrick; the header having a slot configured to receive the arm of the pipe handling system when the arm is extended into the derrick to deliver or receive the tubular to a location above a well head located beneath the derrick; and, whereas when delivering the tubular to the well head, the arm of the pipe handling system engages the slot of the header as the tubular reaches a position over the well head, such that the header resists further upwardly motion of the arm to pretension the pipe handling system.