Portable drilling rig

Claim 1

A portable drilling rig for mounting on a carrier vehicle comprising a turntable rotatably mounted on the vehicle for rotation therein around a vertical axis; slide means pivotally mounted on said turntable for rotation around a horizontal axis; carriage means slidably mounted on said slide means for sliding movement therealong between retracted and extended positions; a drilling derrick mounted on said carriage means for movement with said carriage means between the retracted and extended positions; elevating means for raising and lowering one end of said slide means; means pivotally connecting said derrick to said carriage means; and lifting means for raising the other end of said derrick from said carriage means to orient the derrick with the longitudinal axis thereof in the vertical, whereby actuation of said elevating means raises said one end of said slide means from a transporting position on and in alignment with said carrier vehicle, rotation of said turntable moves said slide means, carriage means and derrick out of alignment with said carrier vehicle to an operating position where said one end of the slide means can be lowered by said elevating means to ground level, sliding of said carriage means along said slide means moves said one end of said carriage means into engagement with the ground, and actuation of said lift means elevates the other end of said derrick to place the derrick in the operating position.