Well bore enlarger

Patent · Tue May 20 04:00:00 EDT 1986

OSTI ID:5671088

Simpson, N A.A.

A hole enlarger is described for enlarging a well bore consisting of: a tubular housing member having an enlarged section with an outer diameter substantially the same as the diameter of the well bore, the enlarged section having longitudinal cut-out portions along its entire length, the cut-out portions defining blades of the enlarged section therebetween, the cut-out portion's arc of outer circumference being smaller than the blade's arc of outer circumference to ensure strength and stability of the hole enlarger; a longitudinal slot within the blade; a cutting arm mounted to the blade within the slot, the cutting arm having cutting edges and a fluid gallery between the cutting edges, the fluid gallery communicating with the slot and the well bore; synthetic diamond material attached to the cutting arm; and means on the tubular housing member for directing a fluid toward and through the fluid gallery of the cutting arm as the cutting arm enlarges the well bore.

• Assignee: Diamant Boart Societe Anonyme, Brussels
• Patent Number(s): US 4589504
• OSTI ID: 5671088
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CARBON
CUTTING TOOLS
DIAMONDS
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
ELEMENTAL MINERALS
ELEMENTS
EQUIPMENT
FLUIDS
MATERIALS
MINERALS
NATURAL GAS WELLS
NONMETALS
OIL WELLS
SYNTHETIC MATERIALS
TOOLS
WELL DRILLING
WELLS