Patent ID: 8539723

Claim:
A tripod derrick, said derrick comprising a first leg having an upper end and a lower end, a second leg having an upper end and a lower end, a third leg having an upper end and a lower end, a first runner strip having a first portion and a second portion and a hinge connecting the first portion and the second portion, a second runner strip having a first portion and a second portion and a hinge connecting the first portion and the second portion, a tip-top assembly, and a cross-brace beam, wherein the tip-top assembly is connected to the upper end of each of the first leg, the second leg, and the third leg, the first runner strip and the second runner strip are positioned side by side and parallel to each other; the cross brace beam connects the first portion of the first runner strip and the first portion of the second runner strip at a position adjacent the hinge; the lower end of the first leg is mounted to the cross brace beam substantially at a location midway between the first runner strip and the second runner strip, the lower end of the second leg is mounted to the first portion of the first runner strip, the cross brace being connected between the second leg and the hinge, the lower end of the third leg is mounted to the first portion of the second runner strip, the cross-brace being connected between the third leg and the hinge, said legs being laid out in a triangular pitch inclining inwardly and upwardly toward the tip-top assembly; in combination with a foundation and at least one fastener securing the second portion of each of the runner strips to the foundation, so that the derrick can be tipped into position on a well.