| Patents for E21B 3 - Rotary drilling (4,061) |
|---|
| 12/10/2009 | WO2009085985A3 System and methods for actuating reversibly expandable structures |
| 12/10/2009 | US20090301783 Microtunnelling system and apparatus |
| 12/09/2009 | CN201358710Y Clockwise and anticlockwise rotation soil throwing control device of rotary drilling rig |
| 12/09/2009 | CN201358709Y Slurry umbrella |
| 12/09/2009 | CN201358708Y Motor load and propelling force self-adaptive hydraulic drilling machine |
| 12/09/2009 | CN101598002A Door frame type drilling machine |
| 12/08/2009 | US7629766 Adapter system for battery-powered tools |
| 12/03/2009 | WO2009098473A3 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 12/02/2009 | EP2126270A1 A top drive apparatus |
| 12/02/2009 | EP2126269A1 Top drive apparatus |
| 12/02/2009 | EP2126268A1 Rig engine control |
| 12/02/2009 | CN201354600Y Fixing device for swing cylinder seat of top drive hanging ring |
| 12/02/2009 | CN201354587Y Self-propelled bicirculation drill |
| 12/02/2009 | CN201354586Y Common S pipe assembly for top drive device of drilling machine |
| 12/02/2009 | CN201354585Y Drill pipe automatic setting upright post driving device |
| 12/02/2009 | CN201354584Y Screw drill tool |
| 11/26/2009 | WO2009142666A1 Pneumatic drifter with replaceable foot pieces |
| 11/26/2009 | WO2009098478A3 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 11/26/2009 | US20090288883 Swivel for use in installing large diameter casing |
| 11/25/2009 | CN201351465Y Fixing device of floating oil cylinder base on top drive lifting ring |
| 11/25/2009 | CN201351453Y Jumbolter with temporary shoring |
| 11/25/2009 | CN101586440A Oriented rotational guide drilling tool |
| 11/25/2009 | CN101586439A Hydraulic power head of full screw earth auger |
| 11/25/2009 | CN100562641C Constant power variable speed variable twisting moment pneumatic boring device |
| 11/19/2009 | US20090283325 Polycrystalline Diamond Compact Drill Bit Blade Design and Nozzle Placement |
| 11/18/2009 | EP2118428A1 Top drive apparatus |
| 11/18/2009 | CN201347720Y Wet dust removal device for rotary drilling machine |
| 11/18/2009 | CN101580212A Counterweight self-handling device for engineering machinery and rotary drilling rig comprising same |
| 11/18/2009 | CN100560929C Well drilling top drive sliding fastening-change head assembly |
| 11/17/2009 | US7617887 Method for casing drilling, drilling unit and adapter device |
| 11/11/2009 | CN201343992Y Electromechanical integration oil drilling rig rotating disc |
| 11/11/2009 | CN101575940A Drilling operation method by utilizing dual drill drilling system |
| 11/11/2009 | CN100559013C Tunneling, anchoring and drilling composite machine |
| 11/05/2009 | CA2821684A1 Methods and apparatus for gripping a wellbore tubular |
| 10/28/2009 | CN101566045A Structure design method for guiding type rotary steering drilling tool |
| 10/28/2009 | CN101566043A Cast-in-situ cylinder pile rotary drilling rig and piling method thereof |
| 10/22/2009 | WO2009128807A1 Breech lock stripper rubber pot mounting structure and well drilling equipment comprising same |
| 10/22/2009 | US20090260887 Spring preloaded bearing assembly and well drilling equipment comprising same |
| 10/22/2009 | US20090260882 Braking devices and methods for use in drilling operations |
| 10/21/2009 | CN201330558Y Jog opening hydraulic drilling rig |
| 10/14/2009 | EP1931851B1 Apparatus for gripping a downhole tubular |
| 10/14/2009 | CN201326393Y Oil pipe winch mechanism of hydraulic rotary-digging drilling machine |
| 10/14/2009 | CN201326376Y Multi-functional hydraulic rotary-digging drilling machine |
| 10/14/2009 | CN201326375Y Combined rock drill |
| 10/14/2009 | CN201326374Y Improved convenient hole drill |
| 10/14/2009 | CN100549357C Multifunction rotary disc speed reducing box |
| 10/08/2009 | WO2009123462A1 A device for registration of rotational parameters during assembly of a pipe string |
| 10/08/2009 | CA2719323A1 A device for registration of rotational parameters during assembly of a pipe string |
| 10/07/2009 | CN201321818Y Brake for operating rod of rotating disc |
| 10/06/2009 | CA2456338C A method and system for connecting pipe to a top drive motor |
| 10/01/2009 | US20090242227 Electric power tool |
| 09/30/2009 | CN201318122Y Well drill rotary table driving mechanism |
| 09/30/2009 | CN100545411C Full hydraulic rock core drilling machine unit head |
| 09/29/2009 | US7594540 Methods and apparatus for applying torque and rotation to connections |
| 09/23/2009 | CN201314194Y Hydraulic-pressure anchor head outputting tension by rotary motion |
| 09/22/2009 | US7591328 Drilling and anchor setting tool |
| 09/16/2009 | CN201310299Y Guide rail guiding device of power faucet |
| 09/16/2009 | CN201310298Y Ice driller |
| 09/16/2009 | CN201310297Y Oil drilling rig automation system |
| 09/16/2009 | CN100540190C Ejection mechanism of battery set and electric tool |
| 09/15/2009 | CA2404752C Top drive for casing connection |
| 09/10/2009 | US20090223719 Dual string orbital drilling system |
| 09/09/2009 | EP2013437B1 Seal assembly for use in a top drive |
| 09/09/2009 | CN101525978A Automatic hydraulic drilling mechanism |
| 09/02/2009 | CN201301663Y Well-digging and hole-drilling device of oil-field underground pneumatic-hydraulic motor |
| 09/01/2009 | US7581460 Drive assembly |
| 08/27/2009 | US20090211813 Drilling rig and method for introducing one or more drilling pipes into an underbalanced well using same |
| 08/26/2009 | CN201297128Y Portable emulsion liquid drilling machine |
| 08/26/2009 | CN201297127Y Handheld emulsion liquid drilling machine used in coal mine |
| 08/20/2009 | US20090206122 Tool assembly having telescoping fastener support |
| 08/19/2009 | CN101512099A A top drive apparatus for drilling a bore hole |
| 08/19/2009 | CN101509355A Double drilling rod drive apparatus and double drill rod mash gas outburst prevention drill |
| 08/13/2009 | WO2009098482A1 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/13/2009 | WO2009098478A2 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/13/2009 | WO2009098474A1 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/13/2009 | WO2009098473A2 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/13/2009 | US20090200747 Breech lock stripper rubber pot mounting structure and well drilling equipment comprising same |
| 08/13/2009 | US20090200084 Injection System and Method |
| 08/13/2009 | CA2715073A1 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/12/2009 | CN201288504Y Digging machine type drill |
| 08/12/2009 | CN201288503Y Multifunctional drill |
| 08/12/2009 | CN201288502Y Pit digging apparatus for small-sized loading machine |
| 08/12/2009 | CN201288500Y Rotary drilling hydraulic power head with vibrator |
| 08/12/2009 | CN101503953A Hydraulic rotor device |
| 08/12/2009 | CN101503946A Carriage apparatus capable of enabling damped oscillation of unit head |
| 08/05/2009 | EP2085566A2 Drilling assembly |
| 08/05/2009 | CN201284618Y Hydraulic rig linked system |
| 08/05/2009 | CN101498198A Electromechanical integrated oil-well rig turntable |
| 08/05/2009 | CN101498197A Force reinforcing driving device for rotating guide drilling tool |
| 08/04/2009 | US7568531 Gear transmission device for power tool |
| 07/30/2009 | US20090188688 Control mechanism for a power tool |
| 07/29/2009 | CN101492996A Rotate speed method for controlling rotate speed and torquemoment of top driving device of oil rig |
| 07/23/2009 | WO2009090421A2 Method and apparatus for drilling auxiliary holes |
| 07/23/2009 | US20090183923 Top drive drilling system and other applications using a low speed direct drive AC motor |
| 07/23/2009 | CA2824963A1 Method and apparatus for drilling auxiliary holes |
| 07/23/2009 | CA2708520A1 Method and apparatus for drilling auxiliary holes |
| 07/22/2009 | CN101487375A Performance test method and system for top-driving drilling apparatus |
| 07/22/2009 | CN100515690C Mode selection mechanism for power tool, and power tool incorporating such mechanism |
| 07/21/2009 | US7564210 Driver for an inflatable rotating exhibit |
| 07/21/2009 | CA2507583C Casing running head |