Development of large diameter drilling equipment (Phase II). Volume II: bit feature test. Final report

Technical Report · Sun Mar 01 00:00:00 EST 1981

OSTI ID:6326361

This Phase II final report (Vol I, II and III) discusses in detail the design of a large diameter drilling system that is capable of rotary drilling 20 foot diameter shafts to 2000 feet and lining the shaft with concrete without using personnel underground. The time and cost of drilling and lining a 20 ft diameter shaft to 1000 ft in severe geological conditions is estimated to be 104 days and about $2300 per foot. The machine is designed to operate in remote locations, is non-permit load, truck transportable, and does not rely on utility companies for electrical power. The report is presented in two volumes. Volume I includes information on drilling machine and lining system, system design parameters and descriptions, economic analysis and operation and maintenance procedures. Volume II contains data, conclusions, and recommendations from tests performed to determine the relative cleaning efficiencies of three bit configurations: CUTTERS ONLY, CUTTER PUMPS, and JET ASSIST. Volume III contains detailed design and testing data for precast segmented lining system.

• Research Organization: Fenix and Scisson, Inc., Tulsa, OK (USA)
• DOE Contract Number: AC22-76ET12482
• OSTI ID: 6326361
• Report Number(s): DOE/ET/12482-1(Vol.1); ON: DE81027840
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
42 ENGINEERING
DRILLING EQUIPMENT
DESIGN
SHAFT EXCAVATIONS
LINING PROCESSES
UNDERGROUND MINING
DRILL BITS
ECONOMIC ANALYSIS
ROTARY DRILLS
DRILLS
ECONOMICS
EQUIPMENT
MINING
012000* - Coal
Lignite
& Peat- Mining
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)