| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 09/04/2013 | CN103282601A Methods for improved active ranging and target well magnetization |
| 09/04/2013 | CN103282596A Bottom preventer for use in a drilling system |
| 09/04/2013 | CN103277368A Independent hydraulic cooling compensation system for crawler-type horizontal directional drilling machine power head |
| 09/04/2013 | CN103277050A Recoverable whipstock and combined fishing tool thereof |
| 09/04/2013 | CN103277049A Slip-type whipstock |
| 09/04/2013 | CN103277048A Automatic sliding well drilling control device |
| 09/04/2013 | CN103277047A Single-shaft stabilized platform device for rotary steering drilling tool and stabilizing method thereof |
| 09/04/2013 | CN103277046A Wheel type truck-mounted drilling rig |
| 09/04/2013 | CN103277045A Column type emulsion drilling machine for coal mines |
| 09/04/2013 | CN103277044A SDL pile work drilling method and pile work drilling machine specially used for implementing same |
| 09/04/2013 | CN103277037A Pipe pile leading-hole construction method under boulder cluster geological condition |
| 09/04/2013 | CN102071875B Automatic control system for winch and control method of automatic control system |
| 09/04/2013 | CN101748970B Ultra-short radius radial well-drilling tool system |
| 09/03/2013 | US8522898 Method for dispersing aqueous based drilling fluid for drilling subterranean boreholes |
| 09/03/2013 | US8522897 Lead the bit rotary steerable tool |
| 09/03/2013 | US8522880 Floating offshore structure for hydrocarbon production |
| 09/03/2013 | CA2621655C Method of drilling a stable borehole |
| 08/29/2013 | WO2013126827A2 Latch assembly |
| 08/29/2013 | WO2013126822A2 Subsea casing drilling system |
| 08/29/2013 | WO2013126555A1 Cementing whipstock apparatus and methods |
| 08/29/2013 | WO2013126070A1 Protection of casing lowside while milling casing exit |
| 08/29/2013 | WO2013123555A1 Apparatus for aligning drilling machines |
| 08/29/2013 | US20130220700 Underwater drilling arrangement and method for making a bore |
| 08/29/2013 | US20130220699 Underwater drilling arrangement and method for making a bore in a bed of a water body |
| 08/29/2013 | US20130220626 Shear laser module and method of retrofitting and use |
| 08/29/2013 | US20130220608 Modified particulate weighting agents and methods of using the same |
| 08/28/2013 | CN203161088U Six-roller reamer |
| 08/28/2013 | CN203161087U Finned steam drilling machine |
| 08/28/2013 | CN203161086U Drilling tool structure suitable for one-trip drilling of inclined shaft section |
| 08/28/2013 | CN203161085U Vehicular drilling workover rig |
| 08/28/2013 | CN203161084U Multifunctional rotary drilling rig |
| 08/28/2013 | CN203161083U Connection device of drill jumbo platform and chassis |
| 08/28/2013 | CN203161082U Mining multi-logic protective loop and multi-linkage-function drilling machine hydraulic system |
| 08/28/2013 | CN203161081U Full-automatic reverse circulation pile driver |
| 08/28/2013 | CN203161080U Agricultural well drilling device |
| 08/28/2013 | CN103270239A Offshore tower for drilling and/or production |
| 08/28/2013 | CN103266913A Gas extraction method |
| 08/28/2013 | CN103266878A Straightening control method and straightening control device for automatic vertical drilling system |
| 08/28/2013 | CN103266853A Drill rod orientation method and device on basis of single-pulse magnetic moment measurement |
| 08/28/2013 | CN103266852A Drilling-type quick pore-forming system and drilling-type quick pore-forming process |
| 08/28/2013 | CN102943620B Pressure-controlled drilling method based on drilling annulus wellbore multi-phase flow computing |
| 08/28/2013 | CN102913130B Full-hydraulic rock-drilling excavator using hydraulic excavator for production |
| 08/28/2013 | CN102162341B Hydraulic drive claw installation tool |
| 08/28/2013 | CN101906936B Hydraulic rock drilling machine of excavator |
| 08/28/2013 | CA2791201A1 Drive device and method for driving a drill rod |
| 08/27/2013 | US8517121 Steerable drilling system |
| 08/27/2013 | US8517111 Systems and methods for circulating out a well bore influx in a dual gradient environment |
| 08/27/2013 | US8517110 Ram tensioner system |
| 08/27/2013 | US8517109 Floating vessel for supporting well head surface equipment |
| 08/27/2013 | CA2611067C Fluid characterization from acoustic logging data |
| 08/22/2013 | WO2013123488A1 Method and system for heating a bed of hydrocarbon- containing rocks |
| 08/22/2013 | WO2013123141A2 Systems and methods for managing pressure in a wellbore |
| 08/22/2013 | WO2013122603A1 Directional drilling systems |
| 08/22/2013 | WO2013122589A1 Swelling debris barrier and methods |
| 08/22/2013 | WO2013122480A1 Method for establishment of a new well path from an existing well |
| 08/22/2013 | WO2013068570A3 Orienting and supporting a casing of a coaxial geothermal borehole |
| 08/22/2013 | WO2012126898A3 Test apparatus |
| 08/22/2013 | WO2012112926A3 Method for strengthening a wellbore |
| 08/22/2013 | US20130216312 Method, System And Rock Drilling Apparatus For Installing A Pipe In Drilled Holes In Rock Drilling |
| 08/22/2013 | US20130214928 Rock drilling rig, method for transfer drive of the same, and speed controller |
| 08/22/2013 | US20130213716 Apparatus and method for lateral well drilling |
| 08/22/2013 | US20130213713 Directional drilling systems |
| 08/22/2013 | US20130213656 Aqueous-Based Insulating Fluids and Related Methods |
| 08/22/2013 | US20130213654 Cementing whipstock apparatus and methods |
| 08/22/2013 | DE102013000512A1 Vorrichtung zum Trockenbohren mit Bohrkleinabsaugung Apparatus for dry drilling with Bohrkleinabsaugung |
| 08/22/2013 | DE102012003120A1 Method for hauling pipeline into borehole, involves generating feeding force for bore process from feeder device outside bore hole, where feeding force is transferred to drilling shaft |
| 08/21/2013 | EP2628891A1 Assembled drilling tool |
| 08/21/2013 | EP2627863A1 Guide post |
| 08/21/2013 | EP2627851A1 Drill assembly |
| 08/21/2013 | CN203145856U Wedge-shaped tooth device for water-proof duct pipe shoe |
| 08/21/2013 | CN203145855U Pipe shoe for offshore drilling riser |
| 08/21/2013 | CN203145832U Deviation prevention control system for rock drilling tool |
| 08/21/2013 | CN203145831U Automatic numerical control drill carriage |
| 08/21/2013 | CN203145830U Double-control device of circulating drill rig |
| 08/21/2013 | CN203145829U Small-bore piercing and hydraulic slotting integrated device based on anchor cable drilling machine |
| 08/21/2013 | CN103261580A Underground drilling apparatus |
| 08/21/2013 | CN103261574A Remotely controlled apparatus for downhole applications and related methods |
| 08/21/2013 | CN103261560A Tools for use in subterranean boreholes having expandable members and related methods |
| 08/21/2013 | CN103261558A Drill assembly |
| 08/21/2013 | CN103256010A Method of assembling drilling rigs |
| 08/21/2013 | CN103256007A Underground dynamic pressurizing drilling rig |
| 08/21/2013 | CN103256006A Driving-type drill bit guiding device |
| 08/21/2013 | CN103256005A Kilometer drilling machine |
| 08/21/2013 | CN103256004A Downward driving slurry-free bed rock mechanical drilling construction method |
| 08/21/2013 | CN102322219B Submarine jet drilling vehicle |
| 08/21/2013 | CN102305022B Salvage-type casing pipe drilling tool for drilling |
| 08/20/2013 | US8511402 Subsea solids processing apparatuses and methods |
| 08/20/2013 | US8511401 Method and apparatus for delivering high power laser energy over long distances |
| 08/20/2013 | US8511388 Devices and methods for transmitting EDS back-up signals to subsea pods |
| 08/20/2013 | US8511385 Well apparatus |
| 08/20/2013 | US8511372 Method and system for accessing subterranean deposits from the surface |
| 08/20/2013 | CA2749316C Adjustable eccentric bushing assembly for a wireline-operated directional core barrel drill |
| 08/20/2013 | CA2572779C System and method for drilling wellbores |
| 08/20/2013 | CA2559140C A method and device for establishing an underground well |
| 08/20/2013 | CA2553002C Automated drill string position survey |
| 08/15/2013 | WO2008134650A3 Method and apparatus for connecting drilling riser strings and compositions thereof |
| 08/15/2013 | US20130206480 Human-Powered Borehole Drill |
| 08/15/2013 | US20130206476 Remotely operable underwater drilling system and drilling method |
| 08/15/2013 | US20130206423 Systems and methods for managing pressure in a wellbore |
| 08/15/2013 | US20130206414 System and method for pre-conditioning a hydrate reservoir |