Matches 1 - 3 out of 3


Match Document Document Title
US20110266062 LATCHING CONFIGURATION FOR A MICROTUNNELING APPARATUS  
A drill rod is disclosed. The drill rod includes a casing assembly defining a length that extends axially between a first end and an opposite second end of the drill rod, and a drive shaft...
US20090223719 Dual string orbital drilling system  
A dual string drilling system for drilling a well bore in an earth formation, having a rotatable, tubular outer drill string and an upper rotatable, tubular inner drill string. An elongate tubular...
US20140041942 High-Speed Triple String Drilling System  
A drilling system for boring into ground includes a bottom hole assembly having a rotatable casing shoe, an independently rotatable driveshaft disposed within the casing shoe, and a bearing...
Matches 1 - 3 out of 3