| Patents for E21B 3 - Rotary drilling (4,061) |
|---|
| 10/30/2002 | CN1376862A Pneumatic anti-freezing unit and system for drilling machine |
| 10/29/2002 | CA2076409C Rock drilling device |
| 09/26/2002 | US20020134555 Tong for wellbore operations |
| 09/25/2002 | CN2512896Y Insert top driving drilling device of self clamping back tongs reverse torque beam |
| 09/25/2002 | CN2512895Y High efficiency multifunction pneuamtic support leg coal mine drilling machine |
| 09/18/2002 | EP1159508A4 Snubbing unit tong apparatus |
| 09/03/2002 | US6443241 Pipe running tool |
| 08/21/2002 | CN1364973A Hydraulic wet drill |
| 08/01/2002 | US20020100501 BOP operating system with quick dump valve |
| 07/31/2002 | EP1226334A1 Method and device of controlling a rock drilling machine |
| 07/18/2002 | US20020092683 Boring unit for pile foundations |
| 07/17/2002 | EP1222356A1 Method and device for moving a tube in a borehole in the ground |
| 07/17/2002 | EP0760896B1 A well entry tool |
| 07/17/2002 | CN2500788Y Simple wheel type farm well drilling machine |
| 07/16/2002 | US6419031 Method of controlling rock drilling |
| 07/04/2002 | US20020084110 Rock drilling and mounting frame |
| 07/03/2002 | CN1357075A Rock drill and mounting frame |
| 07/03/2002 | CN1356450A Drilling apparatus for drilling well in stratum |
| 07/02/2002 | US6412576 Methods and apparatus for subterranean drilling utilizing a top drive |
| 07/02/2002 | US6412554 Wellbore circulation system |
| 06/26/2002 | EP1216341A2 Torque transmission system for helical drilling tools |
| 06/20/2002 | US20020074132 Pipe running tool |
| 06/18/2002 | US6405812 Drilling tool for the air-lifting process |
| 06/12/2002 | CN2495057Y Electromechanical integrated turntable apparatus |
| 06/11/2002 | US6402524 Data transfer system |
| 06/11/2002 | US6401841 Rotary table |
| 06/11/2002 | US6401835 Drilling tool |
| 05/15/2002 | EP1205628A1 A grease tube |
| 04/18/2002 | US20020043403 Load compensator for a pipe running tool |
| 04/10/2002 | CN2485407Y Electric drive for hoist of dilling rig |
| 03/27/2002 | EP1190155A1 Rock drill and mounting frame |
| 03/27/2002 | CN2483499Y Lower connector of power head |
| 03/27/2002 | CN2483498Y Water tap parts of deep drilling vehicle for petroleum prospection |
| 03/21/2002 | DE10042925A1 Drilling platform chuck, comprises support drum, upper and lower gear rims, coupling plate and adjustment plate, all with missing segment sections |
| 03/13/2002 | EP0909362B1 Boring tool for reverse circulation |
| 03/12/2002 | US6354385 Rotary drilling head assembly |
| 03/07/2002 | WO2001069034A3 Wellbore circulation system, kelly bushing, kelly and tong |
| 02/27/2002 | CN2479180Y Rotary table for deep drilling rig and drill truck |
| 02/27/2002 | CN2479179Y Multi-functional power head |
| 02/27/2002 | CN1079877C Device for drilling bore hole in the ground |
| 02/21/2002 | WO2002014648A1 Combined drilling apparatus and method |
| 02/21/2002 | US20020020563 Two-speed shift on demand auger drive |
| 02/20/2002 | CN2477802Y Multipurpose chain box |
| 02/20/2002 | CN2477801Y Feeding thrust self-fastening sealing drill rod sleeve and drill rod of rockbolt drilling machine |
| 02/20/2002 | CN2477800Y Multipoint drilling machine having double drive and longitudinally arranged rotating disk |
| 02/19/2002 | US6347665 Snubbing unit tong apparatus |
| 02/13/2002 | CN2476634Y Controller for beam-pumping unit |
| 01/16/2002 | EP1171683A2 Pipe running tool |
| 01/16/2002 | CN2471920Y Hand tool for drilling in construction engineering |
| 01/09/2002 | CN2470525Y Disk-type braking device of drilling machine |
| 01/09/2002 | CN1077666C Guided drilling system with shock absorber |
| 01/02/2002 | EP1165932A1 Drilling rig with pipe handling means |
| 01/02/2002 | CN2469166Y Parallel arranged rotary table type electric driving mechanism |
| 01/02/2002 | CN2469165Y Powerfull and deep hole electric dill used for coal mine |
| 12/26/2001 | CN2467782Y Hydraulic bolt drilling machine |
| 12/26/2001 | CN2467781Y Drilling machine |
| 12/12/2001 | CN2464921Y Vehicle carried clutch axle gearing electric drill |
| 12/06/2001 | CA2310831A1 Pulley less hydraulic wellhead drive (phwd) |
| 12/05/2001 | EP1159508A1 Snubbing unit tong apparatus |
| 12/05/2001 | CN2463531Y Full-automatic hole drill for erecting rod |
| 12/04/2001 | CA2009733C Device in impact machines |
| 11/28/2001 | EP0812377B1 Hydraulic tubing machine as an attachment for a mobile rotary boring installation |
| 11/28/2001 | CN2462064Y Multi-drilling rod engineering drilling machine with variable drilling rod interval |
| 11/27/2001 | CA2199475C Portable top drive |
| 11/21/2001 | CN2460718Y Hydraulic mill-type drilling machine |
| 11/21/2001 | CN2460717Y Rock drilling electric drill with coaxial core wire |
| 11/20/2001 | CA2038721C Apparatus for supporting a direct drive drilling unit in a position offset from the centerline of a well |
| 11/15/2001 | WO2001086107A1 Rock drilling machine |
| 11/13/2001 | US6315051 Continuous circulation drilling method |
| 11/07/2001 | CN2458194Y On-vehicle water well drilling machine |
| 11/07/2001 | CN1074499C Very high pressure-resistant drilling rig |
| 10/25/2001 | WO2001079652A1 Top drive for casing connection |
| 10/25/2001 | CA2850900A1 Top drive for casing connection |
| 10/25/2001 | CA2756624A1 Top drive for casing connection |
| 10/10/2001 | CN2453104Y Hydraulic apparatus of drilling machine |
| 10/10/2001 | CN2452657Y Light weight drilling machine |
| 10/03/2001 | CN2451713Y Drilling ground machine |
| 09/27/2001 | WO2001071154A1 Method and apparatus for handling tubular goods |
| 09/27/2001 | DE10023467C1 Boring device, to form bores using borer tubes, has holder unit with rotation plate for borer tube having radial locking opening and has locking unit on plate with locking bolt to lock borer tube |
| 09/20/2001 | WO2001069034A2 Wellbore circulation system, kelly bushing, kelly and tong |
| 08/30/2001 | WO2001025652A3 Torque transmission system for helical drilling tools |
| 08/21/2001 | US6276450 Apparatus and method for rapid replacement of upper blowout preventers |
| 08/16/2001 | EP1124037A1 Drilling device |
| 08/09/2001 | US20010012703 Data transfer system |
| 08/09/2001 | DE10005475A1 Drilling device; has inner rod, hollow outer rod and rotation device to rotate both rods, which drives drive wheel of outer rod and drive wheel of inner rod |
| 08/08/2001 | EP1121508A1 Drilling method |
| 07/04/2001 | CN2437838Y Power head for hydraulic screw drill |
| 06/14/2001 | US20010003317 Hydraulic drilling-machine drive |
| 06/07/2001 | DE19957791A1 Hydraulischer Bohrantrieb Hydraulic auger drive |
| 05/15/2001 | CA2009734C Device in impact machines |
| 05/10/2001 | WO2001033043A1 Method and device of controlling a rock drilling machine |
| 05/09/2001 | CN2429618Y Drilling rigs with power unit at middle position and integrated pump for counter-cycle |
| 05/03/2001 | DE19615307C2 Hydraulischer Bohrhammer A drill |
| 04/12/2001 | WO2001025652A2 Torque transmission system for helical drilling tools |
| 04/10/2001 | US6213216 Snubbing unit tong apparatus |
| 04/05/2001 | US20010000099 Snubbing unit tong apparatus |
| 03/29/2001 | WO2001021929A1 Method and device for moving a tube in a borehole in the ground |
| 03/28/2001 | CN2425194Y Integrated drill unit driving gear-box |
| 03/28/2001 | CN2425193Y Rotary head of top-drive drilling unit |
| 02/28/2001 | CN2421402Y Air pick |