Patent ID: 8793960

Claim:
A portable mast assembly comprising: (a) a skid assembly, said skid assembly having a horizontally oriented frame, said frame having longitudinally extending support beams, said support beams having a top surface; (b) a mast assembly, said mast assembly having at least two vertically extendable and retractable columns, each of said vertically extendable and retractable columns supported on a corresponding longitudinally extending mast beam, each said longitudinally extending mast beam positioned upon and supported by said top surface of one of said longitudinally extending support beams of said frame; (c) at least one horizontally oriented actuator, said actuator having an extendible and retractable rod, said horizontally oriented actuator mounted between said skid assembly and said mast assembly whereby extension and retraction of said rod of horizontally oriented actuator will slide said mast beams of said mast assembly directly upon and along said top surface of said longitudinally extending support beams of said frame; (d) a decking surface supported on said frame of said skid assembly wherein said deck surface has an opening providing access below said deck surface of said skid assembly and whereby extension and retraction of said rod of said horizontally oriented actuator will slide said mast beams directly upon and along said top surface of said support beams of said frame of said skid assembly for alignment with said deck surface opening; and (e) a guide comprised of overlapping stacked plates mounted to said top surface of support beams of said frame of said skid assembly whereby said overlapping stacked plates are positioned to slidably retain said mast beams upon said top surface of support beams.