135229 ⎘
Drill bits; Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools of roller-cutter type
Sub-classes:DOWNHOLE EARTH-BORING ROTARY DRILL BITS COMPRISING CENTER CUTTING MODULES AND RELATED METHODS
#2Earth-boring tools including rotatable cutting elements, rotatable cutting elements, and associated components and methods
#3ADDITIVE MANUFACTURE OF BARRIER SLEEVE INSERTS FOR SINTERED BITS
#4Deploying material to limit losses of drilling fluid in a wellbore
#5Methods for supporting wellbore formations with expandable structures
#6Underreamer
#7Multi shot activation system
#8Fluid pressure pulse generator and method of using same
#9Fluid pressure pulse generator and method of using same
#10Hole opener bearing arrangement
#11Herbicidal compositions comprising 4-amino-3-chloro-5-fluoro-6-(4-chloro-2-fluoro-3-methoxyphenyl) pyridine-2-carboxylic acid or a derivative thereof and VLCFA and lipid synthesis inhibiting herbicides
#12DRILLING TOOL, APPARATUS AND METHOD FOR UNDERREAMING AND SIMULTANEOUSLY MONITORING AND CONTROLLING WELLBORE DIAMETER
#13EXPANDABLE ROLLER REAMER
#14Self actuating underreamer