86500561
Jan 12, 2015
Mar 22, 2016
Articles, tools, machines and apparatus for use in drilling, completion, intervention, and production strings allowing production from drilling wells and boreholes, namely, hole openers; power-operated downhole tools to facilitate opening of a borehole or wellbore; power-operated downhole tools to facilitate enlarging of a borehole or wellbore; powered hole openers used to enlarge holes in the ground
Machinery