Tapered cutting tool for reaming tubular members in well bore

Patent · Tue Feb 11 04:00:00 EST 1992

OSTI ID:5291683

Cassel, T E; Lynde, G D

This patent describes a in cutting tool adapted to be positioned within a tubular metal member downhole in a well bore for reaming the inner peripheral surface of the tubular member to a uniform inner diameter and adapted for attachment at its upper end to a drill string for receiving drilling fluid therefrom. It comprises: a tool body having a generally cylindrical intermediate body portion and an integral frusto-conical lower end portion defining the lower end of the too, the tool body having a central bore therethrough for the discharge of drilling fluid receive from the drill string from the lower end; a plurality of planar mounting surfaces spaced about the outer periphery of the tool body and extending along the generally cylindrical tool body portion and the frusto-conical lower end portion, each mounting surface having on the leading side thereof a channel to permit the upward flow of drilling fluid and entrained metal scrap material; and a single continuous column of cutting elements of a similar shape and size on each of the mounting surface arranged generally in an end to end relation, each of the cutting elements having an exposed front cutting face forming a cutting surface, a rear face secured to the associated mounting surface, a peripheral surface extending between the faces, and a relatively sharp edge formed at the juncture of the front face and peripheral surface.

• Assignee: Baker Hughes Inc., Bossier City, LA (United States)
• Patent Number(s): A; US 5086838
• Application Number: PPN: US 7-673186
• OSTI ID: 5291683
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
CUTTING TOOLS
DESIGN
DRILLING FLUIDS
FLUIDS
OIL WELLS
POSITIONING
TOOLS
TUBES
WELLS