March 1999
Industry At A Glance
99-03_drilling_fig1.html (Mar-1999)
A monthly magazine offering industry news, statistics and technical editorial to the oil and gas drilling, exploration and production industry.
Retractable bit assembly running inside drill pipe (or casing) with bit retracted and drilling position with bit expanded. | |
Copyright © 1999 World Oil
Copyright © 1999 Gulf Publishing Company