Dual tractor drilling system

Details Dual tractor drilling system Dual tractor drilling system

2005-09-15

2010-06-29

Thompson, Kenneth (Department: 3672)

Boring or penetrating the earth

With self-acting cyclic advance and retraction of tool or...

C175S095000, C175S097000

Reexamination Certificate

active

07743849

ABSTRACT:
The invention provides a drilling system for use in a borehole through an underground formation, comprising:a drilling assembly including a drill bit for drilling through the formation and a drilling drive;conveyance means including a conveyance drive connected to the drilling assembly and operable to move the drilling assembly through the borehole,wherein the conveyance drive is operable to move the drilling assembly along the borehole into a drilling position and the drilling drive is operable to urge the drill bit into contact with the formation when drilling takes place in the drilling position.

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