| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 03/20/2013 | CN102041965B Coal mine underground over-broken abnormal zone drilling method |
| 03/20/2013 | CN101787856B Reentry method of later-operation pipe column of multi-branch well |
| 03/20/2013 | CN101641491B Distance holder with helical slot |
| 03/19/2013 | US8397833 Construction apparatus with extendable mast and method for operating such a construction apparatus |
| 03/14/2013 | WO2013036133A1 Method and device for producing an opening from a motherbore and into a formation |
| 03/14/2013 | WO2012173395A3 Drilling system having slot for underwater storage of bop assembly |
| 03/14/2013 | WO2012145637A3 Apparatus and method for tool face control using pressure data |
| 03/14/2013 | WO2012142543A3 System and method for coupling an impregnated drill bit to a whipstock |
| 03/14/2013 | WO2012138827A3 Apparatus for controlling drill bit depth of cut using thermally expandable materials |
| 03/14/2013 | WO2011126760A3 Bending of a shaft of a steerable borehole drilling tool |
| 03/14/2013 | US20130062125 Apparatus and Method for Lateral Well Drilling |
| 03/14/2013 | US20130062123 Steering head |
| 03/14/2013 | DE112011101697T5 Zweirohriges Horizontalbohrsystem Zweirohriges Boring |
| 03/13/2013 | EP2566645A1 Undercutting tool |
| 03/13/2013 | CN202788919U Mine drilling and cutting integrated outburst prevention and permeability increasing system |
| 03/13/2013 | CN202788791U Hydropower spin cutting head |
| 03/13/2013 | CN202788631U Hydraulic jet drill |
| 03/13/2013 | CN202788622U Horizontal directional drilling power broaching drilling tool provided with automatic resetting pressure relief device |
| 03/13/2013 | CN202788617U Horizontally oriented reaming device |
| 03/13/2013 | CN202788616U Automatic vertical drilling tool |
| 03/13/2013 | CN202788615U Static-orientation rotary-steering drilling tool |
| 03/13/2013 | CN202788614U Drilling protection device of rotary drilling rig |
| 03/13/2013 | CN202788613U 6*4 flat head diesel wagon drill |
| 03/13/2013 | CN202788612U One-piece drilling machine derrick and base integral movement device |
| 03/13/2013 | CN102966309A High-pressure grinding material jet flow drill carriage device |
| 03/13/2013 | CN102966308A Hydraulic well drilling, cavity drilling and hole drilling technology |
| 03/13/2013 | CN102966307A Crawler-type expanded walking device for all-casing full-circle slewing drilling machine |
| 03/13/2013 | CN102966306A System and operation method for drilling hole on hard rock in one attempt |
| 03/13/2013 | CN101769128B Connecting mechanism for dual shaft drilling machine |
| 03/12/2013 | US8393790 Light metal feed beam for use on a drill rig |
| 03/12/2013 | US8393413 Closed loop control bore hole drilling system |
| 03/12/2013 | US8393410 Millimeter-wave drilling system |
| 03/12/2013 | US8393404 Downhole multiple bore rotary diverter apparatus |
| 03/12/2013 | US8393402 Redundant position reference system for multilateral exit construction and method for use of same |
| 03/12/2013 | US8393399 Blowout preventer with intervention, workover control system functionality and method |
| 03/12/2013 | US8393398 Device for controlling slugging |
| 03/12/2013 | CA2653611C Downhole tool with sensors mounted on extendable hinged pads |
| 03/08/2013 | DE202013001608U1 Vorrichtung zum Erstellen einer Bohrung im Boden Means for creating a hole in the ground |
| 03/08/2013 | CA2752611A1 Geological drill |
| 03/07/2013 | WO2013032652A1 Minimum strain energy waypoint-following controller for directional drilling using optimized geometric hermite curves |
| 03/07/2013 | WO2012014068A3 Flex joint for downhole drilling applications |
| 03/07/2013 | US20130056281 Well bore reamer |
| 03/07/2013 | US20130056280 Sonic latch mechanism |
| 03/07/2013 | US20130056279 Rock drilling rig and method for downhill drive |
| 03/07/2013 | US20130056278 Apparatus and Method for Placement of Downhole Tools Using a Visual Imaging Device |
| 03/07/2013 | US20130056277 Method and Device for Producing an Opening from a Motherbore and into a Formation |
| 03/07/2013 | US20130056274 Underwater stuffing box and method for running a drill string through the stuffing box |
| 03/07/2013 | US20130056273 Method of drilling a subterranean borehole |
| 03/07/2013 | US20130056271 Rock drilling rig, method for controlling the temperature of its drive equipment, and liquid cooling system |
| 03/07/2013 | US20130056270 Subsea noise mitigation systems and methods |
| 03/07/2013 | DE102012017384A1 Plasmabehandlung bei der Herstellung von Richtbohranordnung Plasma treatment in the production of Richtbohranordnung |
| 03/06/2013 | CN202767885U Hot melting drill pit of ice layer directional drilling |
| 03/06/2013 | CN202767881U Propelling plant capable of rotating 180 degrees in horizontal direction used for deep drill rig |
| 03/06/2013 | CN202767880U Sliding tower mechanism of trenchless pipe laying driller |
| 03/06/2013 | CN202767879U Large-scale earth-rock boring machine |
| 03/06/2013 | CN202767878U Multifunctional all-hydraulic drill |
| 03/06/2013 | CN202767877U Hydraulic walking type percussion reverse circulation slot repairing machine |
| 03/06/2013 | CN202767876U Drilling machine arrow-shaped seamless thick wall steel tube intersection type welded traction rod |
| 03/06/2013 | CN202767141U Multifunctional excavator |
| 03/06/2013 | CN202765120U Chassis stabilizing device of rotary drilling machine |
| 03/06/2013 | CN102953683A Pipe pulling construction method through horizontal directional drilling |
| 03/06/2013 | CN102953682A Tilting tray plunger type rotary guide well drilling tool |
| 03/06/2013 | CN102953681A Omni-directional stepping type moving device of drill |
| 03/06/2013 | CN102953680A Construction device |
| 03/06/2013 | CN102953679A Borehole design method |
| 03/06/2013 | CN101688432B Method and apparatus for drilling hole into bedrock |
| 03/05/2013 | US8387706 Negative accumulator for BOP shear rams |
| 03/05/2013 | US8387705 Systems and methods for running casing into wells drilled with dual-gradient mud systems |
| 03/02/2013 | CA2773106A1 Well bore reamer |
| 02/28/2013 | WO2013028558A2 All electric powered mobile jumbo drill machine |
| 02/28/2013 | WO2013028490A1 Rotary steerable assembly inhibiting counterclockwisewhirl during directional drilling |
| 02/28/2013 | WO2013028310A2 Subterranean vibrator with lateral vibration feature |
| 02/28/2013 | WO2013028075A1 Adjustable eccentric bushing assembly for wireline-operated directional core barrel drill |
| 02/28/2013 | WO2012138912A3 Offshore top tensioned riser buoyancy can system and methods of field development |
| 02/28/2013 | US20130048384 Apparatus and method for controlling or limiting rotor orbit in moving cavity motors and pumps |
| 02/28/2013 | US20130048383 Minimum strain energy waypoint-following controller for directional drilling using optimized geometric hermite curves |
| 02/28/2013 | US20130048382 All Electric Powered Mobile Jumbo Drill Machine |
| 02/28/2013 | CA2845097A1 Rotary steerable assembly inhibiting counterclockwise whirl during directional drilling |
| 02/28/2013 | CA2844104A1 All electric powered mobile jumbo drill machine |
| 02/28/2013 | CA2751181A1 Bent bearing assembly for downhole mud motor |
| 02/27/2013 | EP2562348A1 Underwater drilling assembly and method for producing a borehole |
| 02/27/2013 | EP2562347A1 Underwater work assembly and method for anchoring it |
| 02/27/2013 | EP2562346A1 Underwater drilling assembly and method for producing a borehole |
| 02/27/2013 | EP2562310A1 Submarine drilling assembly and method for producing a borehole in a sea floor |
| 02/27/2013 | EP2561184A2 Apparatus and methods for estimating tool inclination using bit-based gamma ray sensors |
| 02/27/2013 | CN202758202U Rotary drilling rig and remote locking / unlocking system thereof |
| 02/27/2013 | CN202755892U Drilling tool assembly for rapid drilling |
| 02/27/2013 | CN202755891U Diving rock inserting drill rig |
| 02/27/2013 | CN202755890U Walking type double circling downhole drill |
| 02/27/2013 | CN202755889U Multi-angle roadway light-duty drilling machine |
| 02/27/2013 | CN202755887U Low-gravitational-center turnplate triaxial mixing drill |
| 02/27/2013 | CN102947534A Subsea completions and well interventions using a vessel of opportunity |
| 02/27/2013 | CN102947533A High load universal joint for downhole rotary steerable drilling tool |
| 02/27/2013 | CN102947114A Rock drilling rig and method for downhill drive |
| 02/27/2013 | CN102947032A Undercutting tool |
| 02/27/2013 | CN102944728A Drilling electric shock alarm system for trenchless drilling machine |
| 02/27/2013 | CN102943681A Method and device for supporting weak adhesion bond soft rock roadway |
| 02/27/2013 | CN102943660A Method for estimating efficiency of bore-cleaning operation of drilling |
| 02/27/2013 | CN102943623A Methods and systems for drilling |
| 02/27/2013 | CN102943622A Support with fixable front end for horizontal directional drilling machine |