135262 ⎘
Drill bits characterised by conduits or nozzles for drilling fluids the bit being a core-bit
Continuous Sampling Drill Bit
#2RAPID ASSEMBLY AND AUTOMATIC SAMPLING DRILLING TOOL FOR FROZEN SOIL LAYER EXPLORATION
#3SIDEWALL CORING TOOL SYSTEMS AND METHODS
#4Continuous Sampling Drill Bit
#5CONTINUOUS SAMPLING DRILL BIT
#6Sidewall coring tool systems and methods
#7Continuous sampling drill bit
#8Coring device
#9Drilling fluid channel structure of core drilling rig
#10Fidelity retaining type coring device for rock sample
#11System for in-situ retained coring of rock sample
#12Continuous sampling drill bit
#13Core catchers for coring tools and related coring tools and methods
#14Coring apparatus
#15Coring tools including a core catcher
#16Single Waterway Drill Bits And Systems And Methods For Using Same
#17Fixed cutter drill bit having core receptacle with concave core cutter
#18DRILL BIT
#19Coring tools for managing hydraulic properties of drilling fluid and related methods
#20FIXED-CUTTER DRILL BITS GENERATING CORES
#21Coring tools and related methods
#22Drill bits with axially-tapered waterways
#23TOP MOUNT DUAL BIT WELL DRILLING SYSTEM
#24Single-waterway drill bits and systems for using same
#25Drill bits with axially-tapered waterways
#26Drill bits with axially-tapered waterways
#27CORE DRILL ASSEMBLY WITH ADJUSTABLE TOTAL FLOW AREA AND RESTRICTED FLOW BETWEEN OUTER AND INNER BARREL ASSEMBLIES
#28Drill bit
#29Self cleaning coring bit
#30Fixing arrangement
#31Continuous sampling drill bit