| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 12/21/1993 | CA1325349C Mining/construction tool bit having bit body fabricated from mn-b steel alloy composition |
| 12/15/1993 | CN2149471Y Self-sharpening drill teeth |
| 12/14/1993 | US5269387 Insert for mine roof tool bit |
| 12/09/1993 | DE4232560C1 Earth-drilling auger device - has screw shaft bore provided with check valve |
| 12/08/1993 | EP0573135A1 Abrasive tools |
| 12/08/1993 | EP0572761A1 Diamond cutters having modified cutting edge geometry and drill bit mounting arrangement therefor |
| 12/08/1993 | CN2148817Y Roller core bit |
| 12/08/1993 | CN2148816Y Coreless bit |
| 12/07/1993 | CA1324889C Diamond compact possessing low electrical resistivity |
| 12/01/1993 | EP0571464A1 Improvements relating to drill bits |
| 12/01/1993 | CN2148169Y All-carbide petroleum drilling tool stabilizer |
| 12/01/1993 | CN2148168Y Extension jet tube for roller bit |
| 12/01/1993 | CN1079006A Boron osmotic method for gear wheel drill bit gear claw neck by paste |
| 11/30/1993 | US5265989 Drilling and chiseling bit with a cutting member in a base member |
| 11/30/1993 | US5265964 Lubricant system for a rotary cone rock bit |
| 11/30/1993 | US5265688 Rock drill |
| 11/30/1993 | US5265685 Drill bit with improved insert cutter pattern |
| 11/30/1993 | US5265675 Well conduit cutting and milling apparatus and method |
| 11/28/1993 | CA2089122A1 Abrasive tools |
| 11/24/1993 | CN2147340Y All-position sleeve hole milling cutter |
| 11/24/1993 | CN1078766A Diamond composite bit produced by low temp. electromoulding and petroleum drill head thereof |
| 11/23/1993 | US5264283 Diamond tools for rock drilling, metal cutting and wear part applications |
| 11/23/1993 | CA1324514C Preformed elements for a rotary drill bit |
| 11/18/1993 | EP0570351A1 O-Ring seal for rock bit bearings |
| 11/18/1993 | EP0569985A1 Rotating tool with hardmetal inserts |
| 11/18/1993 | EP0569663A1 Improved anti-whirl drill bit |
| 11/11/1993 | WO1993022510A1 The arrest, correction and prevention of subsidence in buildings |
| 11/10/1993 | CN2145857Y 42 upward guide flow spherical teeth thread bit head |
| 11/09/1993 | USRE34435 Whirl resistant bit |
| 11/09/1993 | US5259469 Drilling tool for percussive and rotary drilling |
| 11/09/1993 | CA1324013C Masonary drill tip with strong and chamfered cutting edges |
| 11/03/1993 | EP0568292A1 Reamer |
| 11/02/1993 | CA2067900A1 Rotary rock bit cooling lubrication system |
| 10/27/1993 | EP0567259A1 Rock bit with improved gage insert |
| 10/27/1993 | CN2144704Y Toothless drill borehole device for mineral deposit |
| 10/27/1993 | CN2144703Y Toothless drill punched hole device for mineral deposit |
| 10/27/1993 | CN1077773A Bit nozzle having end bore varying with drilled depth |
| 10/26/1993 | US5255741 Process and apparatus for completing a well in an unconsolidated formation |
| 10/19/1993 | US5253961 Coupling for drilling machine with dust extractor |
| 10/19/1993 | US5253723 Ring cutter for tunnel drilling in rock |
| 10/19/1993 | US5253714 Well service tool |
| 10/19/1993 | US5253708 Process and apparatus for performing gravel-packed liner completions in unconsolidated formations |
| 10/14/1993 | WO1993020326A1 Dual metal face seal with single recessed energizer |
| 10/14/1993 | WO1993020325A1 Down reaming apparatus |
| 10/14/1993 | WO1993020324A1 A drilling head device for a tunnel boring machine |
| 10/14/1993 | CA2131380A1 Down reaming apparatus |
| 10/13/1993 | EP0564506A1 Insert having a surface of carbide particles |
| 10/13/1993 | CN2143670Y Multiple aperture drill bit |
| 10/13/1993 | CN1022431C Through type in the hole drill reversing circulation core bit |
| 10/12/1993 | US5251914 Sealing assembly for relatively movable members |
| 10/12/1993 | US5251707 Ice auger cutting head |
| 10/12/1993 | CA1323025C Crossflow rotary cone rock bit with extended nozzles |
| 10/06/1993 | EP0563950A1 Apparatus and method for directional drilling |
| 10/06/1993 | EP0563561A1 Superimposing drilling bit |
| 10/06/1993 | EP0457791B1 Device for taking soil samples |
| 09/30/1993 | WO1993019281A1 Well conduit cutting and milling apparatus and method |
| 09/30/1993 | DE4307680A1 Masonry drill producing holes for anchor points - incorporates bit with asymmetrically arranged cutting faces to produce wave-profiled opening. |
| 09/30/1993 | CA2132858A1 Well conduit cutting and milling apparatus and method |
| 09/29/1993 | EP0561957A1 Cold headed center vacuum drill bit |
| 09/29/1993 | CN1076756A Reversible bit bearing |
| 09/28/1993 | US5248006 Rotary rock bit with improved diamond-filled compacts |
| 09/28/1993 | US5247923 Method of forming a diamond drill bit element using laser trimming |
| 09/16/1993 | WO1993018275A1 Roller cutter assembly having adjustable ring cutter spacing |
| 09/16/1993 | DE4307553A1 Two fluted twist drill - has thick-webbed spiral fluted section at front end which runs out into thin-webbed straight-fluted section with wider flutes at rear end |
| 09/14/1993 | US5244050 Rock bit with offset tool port |
| 09/14/1993 | US5244039 Rotary drill bits |
| 09/14/1993 | CA1322194C Combustion operated drilling apparatus |
| 09/08/1993 | CN2141835Y Mixed multi-drag type bit |
| 09/07/1993 | US5242026 Method of and apparatus for drilling a horizontal controlled borehole in the earth |
| 09/07/1993 | US5242017 Cutter blades for rotary tubing tools |
| 09/03/1993 | WO1993018272A1 Reversible bit bearing for percussion drill |
| 09/03/1993 | CA2109302A1 Reversible bit bearing |
| 09/02/1993 | WO1993017216A1 Insert for mine roof tool bit |
| 09/02/1993 | WO1993017215A1 Method for overburden drilling, casing shoe and casing tube for the method, and coupling element for the casing tubes |
| 09/02/1993 | WO1993017142A1 High strength tungsten carbide material for use in earth boring bits |
| 09/02/1993 | WO1993016833A1 Broaching tool for tubing |
| 09/01/1993 | EP0557485A1 Rock-drilling bit |
| 08/31/1993 | US5240353 Anchor with deoperable screw |
| 08/31/1993 | US5240082 Rotary boring machine |
| 08/25/1993 | EP0556648A1 Drill bit having combined positive and negative rake cutters |
| 08/25/1993 | CN2140952Y Lengthening nozzle for drill bits |
| 08/25/1993 | CN1075530A Drill bit with improved insert cutter pattern |
| 08/24/1993 | US5238075 Drill bit with improved cutter sizing pattern |
| 08/24/1993 | US5238074 Mosaic diamond drag bit cutter having a nonuniform wear pattern |
| 08/19/1993 | WO1993016291A1 Masonry anchors |
| 08/18/1993 | EP0383861B1 Diamond compact possessing low electrical resistivity |
| 08/11/1993 | EP0554568A2 Mosaic diamond drag bit cutter having a nonuniform wear pattern |
| 08/10/1993 | US5234064 Roller cutter assembly having adjustable ring cutter spacing |
| 08/10/1993 | CA1321189C Activated earth drill |
| 08/05/1993 | WO1993015299A1 Down-the-hole rock drill |
| 08/04/1993 | CN2139621Y Drilling bit nozzle intermittence plugging device |
| 08/03/1993 | US5232320 Cutting insert for a rotary cutting tool |
| 07/29/1993 | DE4302063A1 Drill bit for hammer drill - has passageway for cooling medium formed by grooves in drill bit shank and outer tube |
| 07/28/1993 | CN1021708C Diamond composition material and drill bit made of it |
| 07/28/1993 | CA2088028A1 A device for rotary-percussion with inverted fluid flow |
| 07/27/1993 | US5230520 Hydrodynamically lubricated rotary shaft seal having twist resistant geometry |
| 07/27/1993 | US5230389 Fluidic oscillator drill bit |
| 07/27/1993 | CA1320644C Abrasive compacts |
| 07/21/1993 | EP0198060B1 Method and apparatus for combined jet and mechanical drilling |
| 07/21/1993 | CN1021658C Quick thermal treatment process of tooth palm of drill toothed wheel |