Patent ID: 6715564
Filing Date: 2004-04-06
Classification: E21B

Abstract:
A drilling rig to be mounted on a vehicle providing hydraulic fluid under pressure, said rig including:a telescopic boom having a first and second end, said first end being adapted to be pivotally attached to said vehicle for movement about a generally horizontal first axis; a first hydraulic ram mounted on the boom to cause telescopic extension and retraction thereof; a leader pivotally mounted on the second end for movement about a generally horizontal second axis, the second axis being generally transverse of said boom, the leader being adapted to support a drilling assembly; a second hydraulic ram, the second ram being pivotally attached to said boom and pivotally attached to said leader and operable to cause linear movement of said leader relative to said boom; an assembly attached said second end to said leader to provide for said linear movement of said leader relative to said second end in a direction generally perpendicular to said second axis; and a third hydraulic ram, the third ram extending between said boom and leader and being pivotally attached to the leader at a location spaced from said second end for pivoting movement about a generally horizontal fourth axis, the third ram being operable to cause pivoting of said leader about said second axis.