| Patents for E21B 3 - Rotary drilling (4,061) |
|---|
| 07/16/2009 | US20090178854 Mobile soil sampling device with vacuum collector |
| 07/16/2009 | US20090178853 Mobile soil sampling device with vacuum collector |
| 07/15/2009 | CN101481992A Shaft pore-forming equipment and technique |
| 07/14/2009 | US7559359 Spring preloaded bearing assembly and well drilling equipment comprising same |
| 07/14/2009 | CA2540619C Make-up control system for tubulars |
| 07/09/2009 | US20090173543 Slim-hole parasite string |
| 07/08/2009 | CN201269045Y Emergency hoisting and automatic bit feeding apparatus of oil-well rig |
| 07/08/2009 | CN100510308C Well drilling top drive guide rail plate |
| 07/08/2009 | CN100510307C Construction apparatus |
| 07/08/2009 | CN100510306C Airborne anchor rod drilling machine |
| 07/07/2009 | US7557582 Logging while drilling tool for obtaining azimuthally sensitive formation resistivity measurements |
| 07/02/2009 | US20090166091 Drill bit and design method for optimizing distribution of individual cutter forces, torque, work, or power |
| 07/02/2009 | US20090166090 Top Drive Drilling Apparatus |
| 07/02/2009 | CA2709506A1 Top drive apparatus |
| 07/01/2009 | CN201265356Y Transmission shaft of anti-drop screw drill |
| 07/01/2009 | CN201265355Y Rotor screw drill with equal wall thickness |
| 07/01/2009 | CN201265354Y Light full-hydraulic core drilling rig |
| 07/01/2009 | CN201265353Y Full-hydraulic mining rescue drill rig |
| 06/30/2009 | USRE40807 Fluid-operated power tool |
| 06/24/2009 | CN201262040Y Split type speed-changing rock drill |
| 06/24/2009 | CN101466911A Method and apparatus for oscillating a drill string |
| 06/18/2009 | WO2009076648A2 Top drive system |
| 06/18/2009 | WO2009075683A1 Improved pneumatic tool design |
| 06/18/2009 | US20090151955 Big assembly with movable rig floor units |
| 06/18/2009 | US20090151934 Top drive system |
| 06/18/2009 | CA2837581A1 Top drive system |
| 06/18/2009 | CA2707050A1 Top drive system |
| 06/17/2009 | CN201258683Y Oil rig compound with energy-saving generator transmission gear |
| 06/11/2009 | US20090145662 Drilling systems and methods |
| 06/03/2009 | CN101446177A Apparatus and method for excavating vertical hole |
| 06/03/2009 | CN100494614C Submersible reverse circulation engineering drilling rig |
| 05/28/2009 | US20090133933 Method and device for drilling, particularly percussion or rotary percussion drilling, a hole in soil or rock material |
| 05/27/2009 | EP1671010B1 Method and apparatus for controlling the ascent and descent of pipe in a well bore |
| 05/27/2009 | CN201246099Y Hydraulic drive rig power head |
| 05/27/2009 | CN201245305Y Connection structure for top drive apparatus and transportation carrier |
| 05/27/2009 | CN100491688C Chuck and water swivel integrated apparatus for full hydraulic driller for pumping, draining and discharging gas |
| 05/26/2009 | CA2550981C Continuous circulation drilling method |
| 05/20/2009 | CN201241611Y Co- and re-rotating pneumatic drilling machine |
| 05/20/2009 | CN201241610Y Speed limiting mechanism of pneumatic drilling machine |
| 05/13/2009 | CN201236624Y Drilling retraction apparatus of full hydraulic rock core drill rig unit head |
| 05/13/2009 | CN201236623Y Energy-saving generator apparatus |
| 05/13/2009 | CN201236622Y Novel integral transportation high-power belt parallel operation apparatus |
| 05/13/2009 | CN101432498A Top drive apparatus |
| 05/07/2009 | WO2008073612A8 Oilfield operational system and method |
| 05/07/2009 | US20090114403 Method and apparatus for drilling and servicing subterranean wells with rotating coiled tubing |
| 05/06/2009 | CN201232522Y Speed governing hand-held fuel engine rock drill |
| 05/06/2009 | CN101424164A Power swivel for top-drive device |
| 05/06/2009 | CN101424163A Single-rail connecting device and single-rail |
| 05/06/2009 | CN101424162A Back tong for top-drive drilling unit |
| 05/06/2009 | CN100485156C Multiple shaft drilling machine and its construction method |
| 04/30/2009 | US20090107729 Drilling machine |
| 04/30/2009 | US20090107675 Liner Drilling and Cementing System Utilizing a Concentric Inner String |
| 04/29/2009 | CN201228520Y Hand-hold internal combustion concrete driller |
| 04/23/2009 | WO2009051620A1 Stripper rubber with integral retracting retention member connection apparatus |
| 04/23/2009 | US20090101345 Liner Drilling System with Retrievable Bottom Hole Assembly |
| 04/23/2009 | US20090101332 Method and apparatus for drilling with casing |
| 04/22/2009 | CN201225371Y Coal mine drill hydraulic clutch |
| 04/22/2009 | CN201225090Y Engineering water drill |
| 04/21/2009 | CA2497190C Wedge clutch assembly |
| 04/16/2009 | US20090095527 Devices and Methods for Power Control in Horizontal Directional Drilling |
| 04/15/2009 | EP2048321A1 Drill and method for operating a drill |
| 04/15/2009 | CN201221314Y Light vehicle-mounted drill |
| 04/15/2009 | CN201221310Y Power transmission device of oil rig |
| 04/08/2009 | CN201218057Y Drilling apparatus |
| 04/08/2009 | CN101405472A Seal assembly for use in a top drive |
| 04/07/2009 | US7513845 Variable speed transmission for a power tool |
| 04/07/2009 | US7513312 Drilling rig apparatus and downhole tool assembly system and method |
| 04/02/2009 | US20090084537 Top Drive Drilling Apparatus |
| 04/01/2009 | CN201214982Y Close distance speed increasing hard rock deep borehole drilling machine |
| 04/01/2009 | CN101397887A Novel combined boring machine sealing structure |
| 04/01/2009 | CN101397886A hand-hold emulsion boring machine for coal mine |
| 03/31/2009 | US7510024 System and method for breaking chips formed by a drilling operation |
| 03/31/2009 | US7509744 Mode selection mechanism for power tool and power tool incorporating such mechanism |
| 03/26/2009 | US20090078461 Drilling subsurface wellbores with cutting structures |
| 03/25/2009 | CN201212357Y Pump suction type reverse circulation drilling machine |
| 03/25/2009 | CN201212356Y Coal drill for coal mine |
| 03/25/2009 | CN201212355Y Civil drilling machine with sewerage recovering box |
| 03/25/2009 | CN101392630A Drill and method for operating a drill |
| 03/25/2009 | CN101392629A Portable all-hydraulic core drilling rig |
| 03/19/2009 | WO2009001134A3 Top drive apparatus and bails therefor |
| 03/18/2009 | CN101387186A Mining hydraulic drilling rig linkage hydraulic system |
| 03/17/2009 | US7503397 Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly |
| 03/11/2009 | CN201206572Y Bidirectional confluence control system for reciprocation of main hoist of rotary drill rig |
| 03/11/2009 | CN201206571Y Complex control system for main hoist and power head of rotary drill rig |
| 03/11/2009 | CN201206424Y Testing device for multifunction boring equipment |
| 03/11/2009 | CN101382041A Dredger type drill |
| 03/11/2009 | CN101382038A Rotary digging drill power head device with high speed earth throwing function |
| 03/10/2009 | US7500531 Low speed AC motor for direct drive applications |
| 03/05/2009 | WO2009029149A1 Tapered surface bearing assembly and well drilling equipment comprising same |
| 03/05/2009 | WO2009029148A1 Spring preloaded bearing assembly and well drilling equipment comprising same |
| 03/05/2009 | WO2009029147A1 Spring load seal assembly and well drilling equipment comprising same |
| 03/05/2009 | US20090057027 Tapered bearing assembly cover plate and well drilling equipment comprising same |
| 03/05/2009 | US20090057026 Spring load seal assembly and well drilling equipment comprising same |
| 03/05/2009 | US20090057025 Tapered surface bearing assembly and well drilling equipment comprising same |
| 03/05/2009 | US20090057024 Stripper rubber pot mounting structure and well drilling equipment comprising same |
| 03/05/2009 | US20090057023 Spring preloaded bearing assembly and well drilling equipment comprising same |
| 03/05/2009 | US20090057022 Bearing assembly system with integral lubricant distribution and well drilling equipment comprising same |
| 03/05/2009 | US20090057021 Bearing assembly inner barrel and well drilling equipment comprising same |
| 03/05/2009 | US20090057020 Bearing assembly retaining apparatus and well drilling equipment comprising same |
| 03/04/2009 | EP1689967B1 Drilling apparatus with anti-vibration inertial body |