Dual tractor drilling system
AssigneeSchlumberger Technology Corporation
InventorsSpyro Kotsonis, Eric Lavrut
Life of this patent
Estimating the term…
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.
Claims9
A drilling system for use in a borehole through an underground formation, comprising:
- a drilling assembly including a drill bit operable to drill through the formation and a drilling drive having an anchor mechanism for anchoring at least one end of the drilling drive in position in the borehole;
- 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 at a higher rate at which the drilling drive is operable to urge the drill bit into contact with the formation when drilling takes place in the drilling position, the conveyance drive and the drilling drive having both pushing and pulling functions.
Dependencies are inferred from the claim text.