Axial flow turbine drill for earth boring

Patent · Tue Jun 08 04:00:00 EDT 1971

OSTI ID:5707162

Henderson, H I

A downhole axial flow turbine to rotate the drilling bit in earth boring is described. The turbine is actuated by drilling fluid flow. The turbine operates in conjunction with dual-tube drill pipe. The drilling fluid flows downward in the annulus of the dual-tube drill pipe, through the annulus of the turbine, actuating the turbine, through the bit, ascending through the hollow spindle of the turbine, and through the core tube of the dual-tube drill pipe to the surface carrying bit cuttings and core segments. The turbine blades are smoothly curved to minimize fluid turbulence, and maximize power generation. The drill-pipe weight imposed on the bit is independent of the turbine spindle, being imposed by the drill pipe onto the turbine barrel, through a thrust bearing, to the bit. The bit's shank, and/or structure above the bit, is preferably made full-hole size to form a barrier to prevent drilling fluid flowing upward in the borehole annulus. (4 claims)

• Assignee: TUL; EDB-82-054314
• Patent Number(s): US 3583502
• OSTI ID: 5707162
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
BOREHOLES
CAVITIES
CORING EQUIPMENT
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
DRILLS
EQUIPMENT
FLUID FLOW
FLUIDS
HYDRAULIC TURBINES
MACHINERY
NATURAL GAS WELLS
OIL WELLS
PIPES
ROTARY DRILLS
TURBINES
TURBOMACHINERY
TURBULENT FLOW
WEIGHT
WELLS