Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 10 - Drill bits
Patents for E21B 10 - Drill bits (19,464)
11/2007
11/15/2007US20070261892 Device for a drilling tool
11/15/2007US20070261891 Roller Cone Drill Bit With Enhanced Debris Diverter Grooves
11/15/2007US20070261890 Fixed Cutter Bit With Centrally Positioned Backup Cutter Elements
11/15/2007DE102006000221A1 Hartstoffbohrkopf Hard drill
11/14/2007EP1854572A1 Hard material drill head
11/14/2007EP1558832B1 A reamer assembly
11/14/2007CN200975256Y 液压破碎锤钎杆 Hydraulic hammer drill rod
11/14/2007CN200975220Y Diamond hard alloy complex sheet
11/14/2007CN200975219Y Odd-even teeth herringbone polycrystal drill
11/14/2007CN101072924A Rotary drill bit having cutting insert with a notch
11/13/2007US7293617 Polycrystaline diamond compact insert reaming tool
11/13/2007US7293616 Expandable bit
11/10/2007CA2587287A1 Fixed cutter bit with centrally positioned backup cutter elements
11/09/2007CA2588331A1 Thermally stable ultra-hard material compact constructions
11/08/2007WO2007127899A2 Molds and methods of forming molds associated with manufacture of rotary drill bits and other downhole tools
11/08/2007WO2007127680A1 Modular fixed cutter earth-boring bits, modular fixed cutter earth-boring bit bodies, and related methods
11/08/2007WO2007107181A3 Matrix drill bits with back raked cutting elements
11/08/2007US20070256867 Releasable mill
11/08/2007CA2648181A1 Modular fixed cutter earth-boring bits, modular fixed cutter earth-boring bit bodies, and related methods
11/07/2007EP1852202A1 Drill head for drill and drill
11/07/2007EP1851410A1 Drilling tool equipped with improved cutting element layout to reduce cutter damage through formation changes, methods of design thereof and drilling therewith
11/07/2007EP1649135B1 Earth penetrating rotary drill bit with helical ports
11/07/2007EP1585884B1 Bit assembly
11/07/2007CN200971752Y Drill bit of with ball tooth mounted with diamond
11/07/2007CN100347398C Wellstring assembly
11/07/2007CN100347397C Steerable rotary drill bit assembly with pilot bit
11/06/2007US7292967 Methods for evaluating cutting arrangements for drill bits and their application to roller cone drill bit designs
11/06/2007US7290626 Transmission sleeve
11/06/2007US7290624 Method and device for drilling holes in soil or rock material
11/06/2007CA2343912C Mining machine and mining method
11/06/2007CA2311020C Drill bit having diamond impregnated inserts primary cutting structure
11/01/2007WO2007103245A3 Automated steerable hole enlargement drilling device and methods
11/01/2007US20070251734 Rotary-percussion drill with a four-start helical shaft
11/01/2007US20070251733 Hard material bit
11/01/2007US20070251732 Modular Fixed Cutter Earth-Boring Bits, Modular Fixed Cutter Earth-Boring Bit Bodies, and Related Methods
11/01/2007US20070251730 Collapsible rock head
11/01/2007US20070251727 Reamer bit
11/01/2007CA2649525A1 Mechanical parts having increased wear resistance
10/2007
10/31/2007EP1849955A1 Rotary percussion drill bit with a four-groove drill helix shaft
10/31/2007EP1766179B1 Enlarging and stabilising tool for a borehole
10/31/2007DE102006000201A1 Hartstoffeinsatz Hard material insert
10/31/2007CN200968177Y Rotary digging, jostling and enlarging drill
10/31/2007CN101065554A One trip milling system
10/31/2007CN101063402A Drill bit
10/31/2007CN100346052C Replaceable drill bit assembly
10/30/2007US7287610 Cutting elements and bits incorporating the same
10/30/2007US7287609 Drilling a borehole
10/30/2007US7287604 Steerable bit assembly and methods
10/25/2007WO2007120893A2 Automatic tool-bit holder
10/25/2007WO2007120786A1 Methods for designing and fabricating earth-boring rotary drill bits having predictable walk characteristics and drill bits configured to exhibit predicted walk characteristics
10/25/2007WO2007120494A1 High density row on roller cone bit
10/25/2007WO2007120059A1 Cutting, drilling or grinding apparatus and method
10/25/2007WO2006063136A3 Methods of maximizing retention of superabrasive particles in a metal matrix
10/25/2007US20070246266 Drill Bit
10/25/2007CA2648192A1 Methods for designing and fabricating earth-boring rotary drill bits having predictable walk characteristics and drill bits configured to exhibit predicted walk characteristics
10/24/2007CN200964797Y PDC drill bit suitable for large pitch borehole drilling
10/24/2007CN200964796Y PDC drill bit suitable for drilling soft stratum
10/24/2007CN101061290A 岩石钻头 Rock drill
10/24/2007CN101061289A Cast flapper with hot isostatic pressing treatment
10/23/2007US7286959 Drill bit performance analysis tool
10/18/2007WO2007118110A2 Drilling systems and methods
10/18/2007WO2007117242A1 Drill bit lubrication apparatus and method
10/18/2007US20070243099 Components of earth-boring tools including sintered composite materials and methods of forming such components
10/18/2007US20070240910 High-strength, high-toughness matrix bit bodies
10/18/2007US20070240906 Tapered reamer bit
10/18/2007US20070240905 Drill bit with multiple cutter geometries
10/18/2007US20070240904 Methods for designing and fabricating earth-boring rotary drill bits having predictable walk characteristics and drill bits configured to exhibit predicted walk characteristics
10/17/2007CN200961448Y Diamond composite sheet drill bit with combined strut
10/17/2007CN200961447Y Taper connection drill rod
10/17/2007CN200961446Y High speed pure-rolling roller bit bearing
10/17/2007CN101054887A Drilling bit installed with self-inspired pulse resonance jet nozzle
10/17/2007CN100343472C Near drill local low pressure drilling tool
10/17/2007CN100343471C Well reamer
10/17/2007CN100343470C Device for advancing drillings in the ground
10/16/2007US7281594 Rock drill bit
10/16/2007US7281592 Injecting a fluid into a borehole ahead of the bit
10/11/2007WO2007115264A2 Tapered reamer bit
10/11/2007WO2007114749A1 Down-the-hole hammer, percussion bit assembly and method of enlarging a hole
10/11/2007US20070235230 PDC cutter for high compressive strength and highly abrasive formations
10/11/2007US20070235228 Drill, wall protector and drilling method
10/11/2007DE102007016821A1 Actuator, e.g. lifting pad, actuation, for use during e.g. earth drilling process, involves pressurizing actuator with medium, e.g. drilling fluid medium and washing medium, and adjusting actuator by potential energy of medium
10/11/2007CA2645897A1 Down-the-hole hammer, percussion bit assembly and method of enlarging a hole
10/11/2007CA2549782A1 Method for recovering hydrocarbons from subterranean formations
10/10/2007EP1841944A1 Bit for drilling a hole
10/10/2007EP1841943A1 Roller reamer
10/10/2007EP1676015A4 Make-up control system for tubulars
10/10/2007EP1485570B1 Thrust control apparatus
10/10/2007CN200958367Y Composite drilling bit
10/10/2007CN101052779A Device for a drilling tool
10/10/2007CN101050690A Hard alloy crumbed drilling bit
10/10/2007CN101050511A Vacuum heat treatment method for brazing sheet of hard alloy in low cobalt
10/10/2007CN100342113C Bit assembly
10/10/2007CN100341673C Pointed tap-hole rod
10/09/2007US7278500 Roller cutter
10/09/2007US7278499 Rotary drag bit including a central region having a plurality of cutting structures
10/09/2007CA2391359C A method for the manufacturing of a drill bit for percussive rock drilling and a rock drill bit and buttons therefor
10/04/2007WO2007098159A3 Backup cutting element insert for rotary drill bits
10/04/2007US20070227782 Hard composite cutting insert and method of making the same
10/04/2007US20070227781 High Density Row on Roller Cone Bit
10/04/2007US20070227777 Down-the-hole hammer with pilot and method of enlarging a hole
1 ... 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 ... 195