Mobile land drilling apparatus and method

A mobile land rig, for the erection, transport, and disassembly of oil drilling equipment along the ground, said mobile land rig comprising:

• a mobile telescoping substructure box for supporting said mobile land rig;
• said mobile telescoping substructure box having at least one axle coupled thereto with each axle having at least one set of wheels for supporting said mobile telescoping substructure box in rolling relation to a ground surface;
• and
• a mobile drill mast attachable to said mobile telescoping substructure box for supporting said mobile land rig and said mobile drill mast;
• wherein said mobile telescoping substructure box further comprises a stop pin controlled by a stop pin activator responsive to a stop signal upon telescopic extension of the substructure box for supporting said telescoping frame member in maximum telescopic extension.

A method for erecting, transporting, and disassembling a drilling rig on the ground, said method comprising:

• rolling said drill rig components into proximity with said drilling site on ground engaging wheels, said drill rig components including a mobile telescoping substructure box and a drill mast raising said substructure box relative to said ground engaging wheels, disengaging said wheels from said substructure box lowering said substructure box toward the ground,
• connecting said drill mast to said mobile telescoping substructure box,
• raising said drill mast to an upright position, and
• telescoping said mobile telescoping substructure box into an extended position.

A method for erecting, transporting, and disassembling a drilling rig, said method comprising:

• transporting drill rig components to a drilling site using trailer means coupled to said drill rig components,
• positioning said drill rig components into proximity with said drilling site, said drill rig components including a mobile telescoping substructure box and a drill mast;
• connecting said drill mast to said mobile telescoping substructure box;
• raising said drill mast to an upright position;
• telescoping said mobile telescoping substructure box unit toward an extended position;
• monitoring a limit value of said mobile telescoping substructure box rise to an extended limit position,
• sensing the substructure box rise to said limit value, and generating a stop signal indicative of reaching said limit value and said substructure box being in a desired extended position.

A substructure box for supporting a drill mast of a mobile land rig comprising:

• mobile means;
• a first support structure mountable on said mobile means, displaceable between a first position supported on said mobile means and a second position resting on the ground;
• means for selectively displacing said first support structure between said first and second positions thereof;
• a second support structure mounted on said first support structure, displaceable between retracted and extended positions and having means for detachably, pivotally connecting a mast thereon angularly displaceable between a lower, transportable position and an erect, operative position, supported on said second support structure, when connected thereto;
• and
• means for selectively displacing said second support structure between said retracted and extended positions.

A mobile land rig, for the erection, transport, and disassembly of oil drilling equipment along the ground, said mobile land rig comprising:

• a mobile telescoping substructure box for supporting said mobile land rig;
• said mobile telescoping substructure box having at least one axle coupled thereto with each axle having at least one set of wheels for supporting said mobile telescoping substructure box in rolling relation to a ground surface;
• and
• a mobile drill mast attachable to said mobile telescoping substructure box for supporting said mobile land rig and said mobile drill mast;
• wherein said mobile telescoping substructure box further comprises a ground engageable lifting means coupled thereto for selectively supporting said mobile telescoping substructure box unit in raised relation to said ground surface and for selectively lowering said mobile telescoping substructure box into contact with said ground surface.

A mobile land rig, for the erection, transport, and disassembly of oil drilling equipment along the ground, said mobile land rig comprising:

• a mobile telescoping substructure box for supporting said mobile land rig;
• said mobile telescoping substructure box having at least one axle coupled thereto with each axle having at least one set of wheels for supporting said mobile telescoping substructure box in rolling relation to a ground surface;
• and
• a mobile drill mast attachable to said mobile telescoping substructure box for supporting said mobile land rig and said mobile drill mast;
• wherein said mobile telescoping substructure box further includes a support means for locking each axle and each set of wheels to said substructure box when said substructure box is in rolling relation to the ground and for releasing said locking when said substructure box is supported by the ground.