Retractable Core Bit Drilling System.
Larson-WC; Svendsen-WW; Hoffmeister-JF; Cozad-RE
Pres At SME/AIME Ann Meeting Las Vegas Nevada, 1980 Feb; :16 pages
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.
Pres. At SME/AIME Ann. Meeting, Las Vegas, Nevada, February 24-28, 1980, SME Preprint 80-116, 16 Pp