Back pressured hydraulic pump for sucker rod

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.