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)
03/2005
03/29/2005US6873947 Method for simulating drilling of roller cone bits and its application to roller cone bit design and performance
03/29/2005US6872356 Selectively varying material constituents of carbide substrate by subjecting cutter to annealing process during sintering, by subjecting formed cutter to post-process stress relief anneal, or a combination of those means
03/29/2005CA2281976C Combination mill and drill bit
03/29/2005CA2123646C Spherical reaming bit
03/24/2005WO2004048744A3 Apparatus and method for drilling and reaming a borehole
03/24/2005US20050061552 Rotary drill bit
03/24/2005US20050061551 Releasable mill
03/23/2005EP1515837A1 Self sharpening polycrystalline diamond compact with high impact resistance
03/23/2005CN2687304Y Core hydraulic drilling machine
03/23/2005CN1599832A Earth drilling device
03/23/2005CN1598237A Deep hole drift tool
03/23/2005CN1598236A Deep hole drift tool and deep hole on construction member for assembling and fixing
03/22/2005US6870356 Method and apparatus for vertical voltage potential mapping
03/22/2005US6868924 Rock drill
03/22/2005US6868848 Cutting tool and method of using same
03/17/2005WO2005024173A1 Drilling arrangement
03/17/2005US20050056463 Steerable bit assembly and methods
03/17/2005US20050056462 Lip seal for roller cone drill bit
03/16/2005EP1514657A1 Drill bit
03/16/2005EP1404941B1 Well drilling bit
03/16/2005CN2685531Y Drilling tool
03/16/2005CN2685530Y Drill bits for enlarging the borehole
03/16/2005CN1594825A Cone single roller bit
03/15/2005US6866106 Fluid drilling system with flexible drill string and retro jets
03/10/2005WO2005021924A1 Rotary roller reamer
03/10/2005WO2005021923A1 Bearing assembly for a drill bit
03/10/2005US20050051366 Self sharpening polycrystalline diamond compact with high impact resistance
03/10/2005US20050051365 Drill head
03/10/2005US20050051361 Method of designing a drill bit, and bits made using said method
03/09/2005CN2683824Y Swirl nozzle
03/09/2005CN2683823Y Drill rod and head for drilling frozen clay bore hole
03/09/2005CN2683822Y Super-high pressure double flow passage PDC drill head
03/08/2005US6863213 Method and system for providing a decision support for users for selecting drilling and cutting elements for use in a construction material region
03/08/2005US6863138 High offset bits with super-abrasive cutters
03/08/2005CA2169365C A cutter for a boring head, a device for accommodating thermally expanding grease, and a method of greasing bearings in a cutter
03/03/2005WO2005019597A1 Window mill and drill bit
03/03/2005WO2005019594A1 Releasable mill
03/03/2005WO2005019593A2 Helical drag bit and method of using the same
03/03/2005WO2004106693A3 Method and appartus for cutting earthen formations
03/03/2005WO2004099550A3 Drilling aparatus
03/03/2005WO2004094734A3 Drill bit
03/03/2005US20050045387 Lubricant pump and cone movement dampener
03/03/2005US20050045380 Drilling apparatus
03/03/2005US20050044755 Releasable auger tooth
03/03/2005DE10334610A1 Bohrkopf Wellhead
03/03/2005CA2536237A1 Drilling apparatus, method, and system
03/02/2005CN1587632A Torque slot reamer and anchor hole on building piece
03/01/2005US6861137 High volume density polycrystalline diamond with working surfaces depleted of catalyzing material
03/01/2005US6861098 Polycrystalline diamond partially depleted of catalyzing material
03/01/2005US6860344 Monolithic roof cutting bit insert
02/2005
02/28/2005CA2479554A1 Coated diamonds for use in impregnated diamond bits
02/28/2005CA2479337A1 Cutting element structure for roller cone bit
02/24/2005WO2004095036A3 Method and apparatus for vertical voltage potential mapping
02/24/2005US20050039954 Method of producing downhole drill bits with integral carbide studs
02/24/2005US20050039953 Blockless reamer
02/24/2005US20050039952 Drilling apparatus, method, and system
02/24/2005US20050039905 Window mill and drill bit
02/23/2005EP1507954A1 A downhole tool for use in a wellbore
02/23/2005CN2680844Y Square aiguille
02/23/2005CN2680730Y Drilling bit for concrete pile pumped inside pipe
02/22/2005CA2478191A1 Lubricant pump and cone movement dampener
02/22/2005CA2192580C Drilling tool with internal cavities for chip removal
02/21/2005CA2478707A1 Multiple diameter cutting elements and bits incorporating the same
02/17/2005WO2005014968A1 Roller cutter
02/17/2005WO2004111284A3 Composite material for drilling applications
02/17/2005US20050038631 Drill bit performance analysis tool
02/17/2005US20050034901 Fluid drilling head
02/17/2005US20050034897 Reamer apparatus for ground boring machine
02/17/2005US20050034896 Pipe burying method
02/17/2005DE10334150A1 Hand tool to roughen the inner surface of a drilled hole has an off-centre plug with cutting projections
02/17/2005DE10308538B4 Verfahren zum Herstellen einer Schlitzwand im Boden, Schlitzwandfräse und Schlitzwandfräsvorrichtung A method for making a trench wall in the ground, a trench wall cutter and trench wall
02/16/2005EP1507061A1 Improvements in and relating to a releasable auger tooth
02/16/2005EP1506830A1 A cutting plate for a drill bit
02/16/2005CN2679344Y Bit with combined connection hole
02/16/2005CN2679343Y Shaft assembly of screw drill
02/16/2005CN2679342Y Pallet double-core broaching tool
02/16/2005CN2679341Y Pore forming appts. for winged reinforced concrete poured support water-seal pile
02/16/2005CN2679340Y Single action core bit having internal advance double tubes
02/16/2005CN1579686A A cutting plate for a drill bit
02/16/2005CN1189300C Rock drill
02/15/2005US6856949 Wear compensated roller cone drill bits
02/15/2005US6854536 Pile reamer with spoil container
02/13/2005CA2478443A1 Releasable auger tooth with shock-absorbing retaining means
02/10/2005WO2005012688A1 Method and system for accessing subterranean deposits from the surface and tools therefor
02/10/2005US20050029017 Well string assembly
02/10/2005US20050028982 Specialised petroleum services group limited
02/09/2005EP1505251A2 Drilling method
02/09/2005EP1232320B1 A method for the manufacturing of a drill bit for percussive rock drilling and a rock drill bit and buttons therefor
02/09/2005CN2677582Y Convex wedge cutting teeth for roller bit
02/09/2005CN2677579Y Low-noise wall bit
02/09/2005CN2677577Y Large pneumatic drill hammer
02/09/2005CN1576512A Drilling head
02/09/2005CN1576511A Method for drilling a borehole and wet boring tool
02/08/2005US6852414 Self sharpening polycrystalline diamond compact with high impact resistance
02/08/2005US6851758 Rotatable bit having a resilient retainer sleeve with clearance
02/08/2005US6851491 Internal pressure indicator and locking mechanism for a downhole tool
02/03/2005WO2005010317A1 Downhole hammer drill
02/03/2005US20050023043 Wedge tooth cutter element for drill bit
02/03/2005US20050023042 Dynamic seal with soft interface
02/03/2005US20050023039 Method for sinking a borehole in the ground and wet boring tool
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