Reverse torque drive system
Reverse-circulation cementing of surface casing
Reversible bit bearing
Reversible casing for a down-the-hole percussive apparatus
Reversible gel plugging of underground formations
Reversible impact-operated boring tool
Reversible percussion piston drill apparatus
Reversible pneumatic underground piercing tool
Reversing mechanism for the direction of rotation in a...
Revised cure cycle for annular packing units
Revolving cutters for rock bits
Rf in situ heating of heavy oil in combination with steam...
Rheology controlled heterogeneous particle placement in...
Rheology test system
Rheology-controlled flowable and pumpable aqueous...
Ribbed sealing element and method of use
Ribless bit with diamond impregnated cutter elements
Rig control system architecture and method
Rig engine control
Rig for round trip operations at a well