Patents for E21B 3 - Rotary drilling (4,061) |
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03/04/2009 | CN201202399Y Main shaft of top drive drilling device |
02/25/2009 | EP1753932B1 Top drive |
02/25/2009 | CN201198735Y Self-power generation walking type pile machine |
02/25/2009 | CN201198734Y Hand-hold emulsifiable solution drill |
02/24/2009 | US7493970 Shock mounted top drive |
02/18/2009 | CN201196023Y Screw pile machine |
02/18/2009 | CN201196022Y Petroleum natural gas mechanical transmission drill rig |
02/18/2009 | CN101371004A Modular top drive |
02/18/2009 | CN100462522C Apparatus and method for pressure-held drilling and grooving of outburst coal bed |
02/11/2009 | CN201193653Y Slewing ring bearing for oil rig |
02/11/2009 | CN201193477Y Power head of electric spiral digging drill |
02/11/2009 | CN201192985Y Multi-function tractor |
02/10/2009 | US7487848 Multi-seal for top drive shaft |
02/05/2009 | WO2009017290A1 Method for constructing arch-type utility pole underbracing for overhead line using extendable excavating unit for auger crane |
02/04/2009 | CN201190533Y Portable drilling rig |
01/28/2009 | CN201187254Y Plastic slide board of drill guide rail |
01/28/2009 | CN201187250Y Power head type drill slide board guide mechanism |
01/28/2009 | CN201187249Y Single speed reducer single motor rotary digging drill power head apparatus |
01/28/2009 | CN201187248Y Rotary digging drill power head apparatus with high speed soil-throwing function |
01/28/2009 | CN201187247Y Oil rig driven by high voltage AC frequency conversion electric power |
01/27/2009 | US7481281 Systems and methods for the drilling and completion of boreholes using a continuously variable transmission to control one or more system components |
01/21/2009 | CN201184127Y Well drilling top drive balancing device |
01/21/2009 | CN201184126Y Mining large-scale inverse well drill |
01/21/2009 | CN201184125Y Pulling type frequency conversion electric power drive 4000m oil rig |
01/21/2009 | CN201184124Y Well drill machine |
01/21/2009 | CN201183744Y Coal mining drill jack supporting device |
01/20/2009 | US7478685 Hydraulic drilling machine for working in a small space |
01/14/2009 | EP2013437A1 Seal assembly for use in a top drive |
01/14/2009 | EP2013436A1 Top drive apparatus |
01/14/2009 | CN100451293C Driller design scheme |
01/07/2009 | CN201176871Y All-hydraulic type rock core boring machine hydraulic control system |
01/07/2009 | CN201176848Y All hydraulic drive rig power head |
01/06/2009 | US7472762 Top drive oil flow path seals |
01/06/2009 | CA2512651C Integrated drilling dynamics system and method of operating same |
01/01/2009 | US20090000825 Power swivel incorporating removable/replaceable bearing core |
12/31/2008 | WO2009001134A2 Top drive apparatus and bails therefor |
12/31/2008 | WO2008125942A8 Soil milling machine |
12/31/2008 | CN201173087Y Deep sea core sampling boring machine drilling power head |
12/30/2008 | US7469755 Method and apparatus for drilling and servicing subterranean wells with rotating coiled tubing |
12/25/2008 | US20080314640 Hydrocarbon recovery drill string apparatus, subterranean hydrocarbon recovery drilling methods, and subterranean hydrocarbon recovery methods |
12/24/2008 | CN101328785A Multi-electric machine power head |
12/24/2008 | CN101328784A Drilling lead synchronous tracking screw thread pile machine with automatic control system |
12/24/2008 | CN100445513C Self-fastening sealed drill sleeve and drill rod driven by drilling machine of anchor rod |
12/15/2008 | CA2634976A1 A guide rail plate for top drive of a drilling system |
12/11/2008 | US20080302551 Electric tool |
12/10/2008 | CN201162488Y Rockbolt drilling machine |
12/10/2008 | CN201162487Y Power water tap of top driving device |
12/10/2008 | CN101319596A Short distance speed-increasing type hard rock deep borehole drilling device |
12/09/2008 | US7461707 Electric horizontal directional drilling machine system |
12/04/2008 | WO2008147210A2 A device for a top drive drilling machine for continuous circulation of drilling mud |
12/04/2008 | CA2690007A1 A device for a top drive drilling machine for continuous circulation of drilling mud |
12/03/2008 | CN201159266Y Special gearbox for thin coal seam mining drill rig |
11/27/2008 | WO2008144329A1 Planetary gear set centering ring |
11/26/2008 | CN201155308Y Hydraulic rotor device |
11/26/2008 | CN201155299Y Tractor boring machine |
11/20/2008 | WO2008138226A1 Screw energy converter |
11/19/2008 | CN101306646A Multi-function tractor |
11/18/2008 | CA2490128C Rotating drilling head drive |
11/18/2008 | CA2405686C Rock drilling machine |
11/12/2008 | EP1990502A2 Device for driving the rotation of a driven tubular element, capable of receiving and carrying a fluid under pressure |
11/12/2008 | CN201148836Y Hydraulic rock core drilling machine power head |
11/12/2008 | CN201148835Y Water sprinkling type project drill |
11/05/2008 | CN201144640Y Hydraulic telescopic door frame type drill |
11/05/2008 | CN201144637Y Power head with shock-absorbing device |
10/29/2008 | EP1984137A2 Modular top drive |
10/29/2008 | EP1588014B1 Mounts for blowout preventer bonnets |
10/29/2008 | CN101295424A Alarming method and device for preventing drilling rod-dropping accident of rotary digging drill rig |
10/23/2008 | WO2008125942A1 Soil milling machine |
10/22/2008 | CN201137460Y Fully-mechanized mining working faces emulsion dashing-proof drilling machine |
10/16/2008 | WO2008122086A1 Extendable member |
10/15/2008 | EP1980709A1 Method for simultaneous handling and loading of drilling rods and casings by means of two independent rotaries |
10/02/2008 | WO2008117083A1 A top drive apparatus |
10/02/2008 | WO2008044158B1 Internal breaker for oilfield fluids |
10/02/2008 | WO2008028075B1 Method and system for managing a drilling operation in a multicomponent particulate system |
10/01/2008 | CN201125672Y Oil-well rig alternating current driving device power units |
10/01/2008 | CN201125671Y Anchor bolt recovering device |
09/25/2008 | US20080230274 Top drive washpipe system |
09/24/2008 | CN101273181A Equipment for retaining down-hole pipe fitting |
09/24/2008 | CN100420822C Drilling machine with supporting frame |
09/17/2008 | EP1970526A2 Top Drive Casing System |
09/12/2008 | WO2008108779A2 Extendable cutter drum for a boring machine |
09/12/2008 | WO2008107717A1 Top drive apparatus |
09/11/2008 | US20080217987 Drilling apparatus and system for drilling wells |
09/11/2008 | US20080217986 Extendable cutter drum for a boring machine |
09/11/2008 | US20080217068 Method of installing large diameter casing and swivel for use therewith |
09/10/2008 | CN100417837C Gear transmission device for power tool |
09/09/2008 | CA2459839C Methods and apparatus for connecting tubulars while drilling |
09/04/2008 | DE202008009050U1 Erdbohrvorrichtung Boring apparatus |
09/03/2008 | CN201110126Y Turntable independent drive device |
09/03/2008 | CN201110125Y Rotary digging drill dynamic head having monitoring system |
09/03/2008 | CN100416039C Method and device for moving tube in borehole in ground |
08/28/2008 | WO2008102175A1 Top drive apparatus |
08/28/2008 | WO2008102166A1 Rig engine control |
08/28/2008 | CA2678686A1 Top drive apparatus |
08/27/2008 | EP1961913A1 Top drive |
08/27/2008 | EP1961912A1 Top drive |
08/27/2008 | EP1960122A1 A vibratory apparatus for a rotary-vibratory drill |
08/27/2008 | CN201106409Y Two-stage propulsion combined oil cylinder of drilling machine |
08/27/2008 | CN201106401Y Top drive drilling machine loop-lifting apparatus with load sensor |
08/27/2008 | CN201106400Y Uniform wall thickness rubber stator for petroleum screw drill |