Boring or penetrating the earth – With tool shaft detail – Shaft carried guide or protector
Reexamination Certificate
2006-06-06
2006-06-06
Pezzuto, Robert E (Department: 3671)
Boring or penetrating the earth
With tool shaft detail
Shaft carried guide or protector
C166S241600
Reexamination Certificate
active
07055631
ABSTRACT:
A drill pipe protector having a tubular sleeve that is attached to a section of drill pipe and resides over the outer diameter of the drill pipe while moving within an associated well casing or well hole. The sleeve has low-friction end pads positioned on the ends of the sleeve to reduce friction between the ends of the sleeve and the end of an adjacent thrust bearing collar used to hold the sleeve in place on the drill pipe.
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Fuller Andrew Dale
Mitchell Brian
Moore Norman Bruce
Christie Parker & Hale LLP
Pezzuto Robert E
Western Well Tool, Inc
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