Patent ID: 9650841
Date: 2017-05-16
CPC Classifications: E21B

Claim:
1. A portable mast assembly comprising; (a) a skid assembly, said skid assembly having a horizontally oriented frame, said frame having at least two longitudinally extending support beams, each having a support beam central longitudinal axis; (b) a mast assembly, said mast assembly having at least two longitudinally extending mast beams, each mast beam having a central longitudinal axis that is parallel to the central longitudinal axes of the support beams, each mast beam supporting a vertically extending column, each said longitudinally extending mast beam positioned and supported upon one of said longitudinally extending support beams of said frame; (c) said mast beams being slidably movable along the top of said support beams of said frame; and (d) wherein each support beam has support beam ends and a support beam length between said support beam ends; (e) wherein each mast beam has mast beam ends and a mast beam length between said mast beam ends that is shorter than said support beam length; (f) wherein said mast assembly is movable upon said skid a maximum distance between first and second spaced apart positions; and (g) wherein said mast beams are positioned between said support beam ends when the mast assembly moves between said first and second positions; and (h) further comprising a lateral support that connects one vertically extending column to the other vertically extending column, the lateral support having a generally U-shaped opening as viewed from above.