Air motor operated rotary earth drilling tool

Patent · Tue Nov 14 00:00:00 EST 1989

OSTI ID:7053613

McDonald, W J; Wasson, M R; Leitko, C E; Pittard, G T; Maurer, W C

This patent describes an air motor operated rotary earth drilling tool, for use with a source of high pressure, high volume compressed air. It comprises: a circulation control housing, a motor housing, a reduction gear housing, and a bearing housing connected longitudinally in series. The circulation control housing having an inlet for connection to a source of high pressure, high volume, compressed air, an outlet opening into the motor housing, and an exhaust opening for discharge of compressed air for flushing cuttings and debris from a bore hole. The motor housing having an inlet connected to receive compressed air from the circulation control housing outlet, a motor chamber, an air motor rotor positioned therein, and outlet opening for discharge of compressed air; a reduction gear train supported in the reduction gear housing;bearing means; a hollow, rotary drill bit sub; and valve means in the circulation control housing controlling the exhaust opening.

• Assignee: Gas Research Institute, Chicago, IL
• Patent Number(s): US 4880065; A
• Application Number: PPN: US 7-258175A
• OSTI ID: 7053613
• Resource Relation: Patent File Date: 14 Oct 1988
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
NATURAL GAS WELLS
ROTARY DRILLING
OIL WELLS
ROTARY DRILLS
PNEUMATICS
AIR FLOW
MOTORS
DRILLING
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
FLUID FLOW
FLUID MECHANICS
GAS FLOW
MECHANICS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing