Retractable core bit drilling system.
Larson WC; Svendsen WW; Hoffmeister JF; Cozad RE
Pres At SME/AIME Ann Meeting Las Vegas Nevada, 1980 Feb; :1-16
This paper presents the background, history, and current development of a retractable core bit for a wireline drilling system. Design criteria, concept development, and system of the retractable bit system are discussed, including laboratory test results.
Mining; Mining industry; Mining equipment; Tools; Drilling; Drillers; Equipment design; Laboratory testing
Pres. At SME/AIME Ann. Meeting, Las Vegas, Nevada, February 24-28, 1980, SME Preprint 80-116