Patent ID: 9415819
Filing Date: 2016-08-16
CPC Classification: B62D,E21B

Claim Text:
1. A rig movement and rotation assembly which comprises: a first pair of vertical lifting jacks, comprising a first vertical lifting jack and a second vertical lifting jack; a second pair of vertical lifting jacks, comprising a third vertical lifting jack and a fourth vertical lifting jack; each of said vertical lifting jacks having an upper end connected to a rig substructure and a lower end; a first roller assembly connected to said lower end of each of said first pair vertical lifting jacks, and a second roller assembly connected to said lower end of each of said second pair of vertical lifting jacks, each said roller assembly rotatable on an axis; a steering cam arm bracket extending from each said roller assembly; a first connecting link comprising an outer tube and an inner tube, the inner tube fits and telescopes within the outer tube, wherein said first connecting link joining said steering cam arm brackets from said first roller assemblies of said first pair of vertical lifting jacks together; a second connecting link comprising an outer tube and an inner tube, the inner tube fits and telescopes within the outer tube, wherein said second connecting link joining said steering cam arm brackets from said second roller assemblies of said second pair of vertical lifting jacks together; a first actuator within the outer tube extends or retracts a length of said first connecting link, where the first actuator is located between the first vertical lifting jack and the second vertical lifting jack; a second actuator within the outer tube extends or retracts a length of said second connecting link, where the second actuator is located between the third vertical lifting jack and fourth vertical lifting jack; and a skid pad for each of said vertical lifting jacks, each said skid pad engaging said roller assembly via a plurality of openings in an annular pattern on each said roller assembly and a plurality of openings in an annular pattern on each said skid pad, wherein locking pins are received through said roller assembly openings and in said skid pad openings to lock each said roller assembly to each said skid pad in any of a plurality of orientations.