Mast leg pulley

摘要

A mast system includes a first leg of a mast pivotally connected to a pivot support and a second leg of the mast pivotally connected to a leg support. The leg support has a first support end with a surface connector to attach to a rig surface and a second support end with a leg connector to connect to the second leg to form a joint. A cable with a first cable end is attached to the leg support, and a force is exerted on the leg support through the cable that causes the leg support to rotate about the joint when the mast is lowered.

主权项

1. A mast system, comprising:
a first leg of a mast pivotally connected to a pivot support at a pivot connector; a second leg of the mast pivotally connected to a leg support; the leg support having a first support end with a surface connector to attach to a rig surface and a second support end with a leg connector to connect to the second leg to form a joint; and a cable with a first cable end attached to the leg support; the first leg is a back leg of the mast and the second leg is a front leg of the mast; a first pulley connected to the back leg, the first pulley positioned to angle a first portion of the cable with respect to another portion of the cable; wherein the first leg rotates about the pivot connector when the mast is raised to an upright position.