| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 12/19/2013 | US20130333947 Magnetostrictive motor for a borehole assembly |
| 12/19/2013 | CA2876375A1 Modular rotary steerable actuators, steering tools, and rotary steerable drilling systems with modular actuators |
| 12/18/2013 | EP2674566A1 Method and system for directional drilling and coupling sub |
| 12/18/2013 | CN203348228U Independent hydraulic cooling compensation system used for crawler-type horizontal directional drilling machine power head |
| 12/18/2013 | CN203347689U Variable-diameter barrel drill and rotary drilling rig |
| 12/18/2013 | CN203347688U Deviation-control way-type drilling unit |
| 12/18/2013 | CN203347687U Water-well drilling rig alignment device |
| 12/18/2013 | CN203347686U Drilling machine for roadways |
| 12/18/2013 | CN203347685U Double-rotation and double-lifting airborne drilling machine |
| 12/18/2013 | CN203347684U Rock drill silencer |
| 12/18/2013 | CN203347683U Cross-shaped drill machine power head |
| 12/18/2013 | CN203347682U Coal mine trestle-column-type emulsion drilling machine |
| 12/18/2013 | CN203346873U Low-headroom pile frame |
| 12/18/2013 | CN103459749A Apparatus for controlling drill bit depth of cut using thermally expandable materials |
| 12/18/2013 | CN103452531A Method for underbalanced tubing descending, non-well-killing gas lifting, rotary pumping, pump maintaining and tubing maintaining |
| 12/18/2013 | CN103452488A Moving device used for coal mine drilling machine |
| 12/18/2013 | CN103452482A Bevel gear set reversing underground pulse jet supercharging device |
| 12/18/2013 | CN103452481A Downhole booster |
| 12/18/2013 | CN103452480A Gravity pushing type vertical-drilling deviation control device |
| 12/18/2013 | CN103452479A Angle-adjustable engineering geological drilling rig |
| 12/18/2013 | CN103452478A Unbalanced stabilized platform of rotary steerable drilling system |
| 12/18/2013 | CN103452477A Environment-friendly type towed-type horizontally-oriented drilling machine |
| 12/18/2013 | CN103452476A A rock drilling rig and method of driving compressor |
| 12/18/2013 | CN103452475A Hole forming method for underground soft fractured formation casting protection holes of coal mine |
| 12/18/2013 | CN103452474A Method for perforating underground mined-out area of open-pit mining |
| 12/18/2013 | CN103452473A Method for performing small-diameter deep well construction by using full-face high-counterweight drill bit device |
| 12/18/2013 | CN103452472A Slurry pumping type well drilling device and well drilling method |
| 12/18/2013 | CN102587829B Drilling tool and piling machine |
| 12/18/2013 | CN102536121B Pulse type underground pressurization jet flow drilling method and device |
| 12/18/2013 | CN102383793B Dual function machine for drilling and loading in tunnel |
| 12/18/2013 | CN102162336B Locating device for rotary steering drilling tool of motor pump |
| 12/17/2013 | US8607895 Drilling fluid additive for reducing lost circulation in a drilling operation |
| 12/17/2013 | US8607894 Offshore thermal treatment of drill cuttings fed from a bulk transfer system |
| 12/17/2013 | US8607859 Method of drilling and running casing in large diameter wellbore |
| 12/17/2013 | CA2715451C Data aggregation for drilling operations |
| 12/17/2013 | CA2582258C Drilling unit |
| 12/15/2013 | CA2818355A1 Closed loop well twinning methods |
| 12/12/2013 | WO2013184791A1 Subsea overpressure relief device |
| 12/12/2013 | WO2013184435A1 Lateral wellbore completion apparatus and method |
| 12/12/2013 | WO2013184280A1 Systems and methods for vertical depth control during extended-reach drilling operations |
| 12/12/2013 | WO2013077905A3 Systems and methods for continuous and near continuous drilling |
| 12/12/2013 | US20130330132 Tension frame |
| 12/12/2013 | US20130327573 Method and System for Laterally Drilling Through a Subterranean Formation |
| 12/12/2013 | US20130327572 Lateral wellbore completion apparatus and method |
| 12/11/2013 | EP2672057A1 Dynamic working area |
| 12/11/2013 | EP2670936A2 Method for strengthening a wellbore |
| 12/11/2013 | CN203335072U Multifunctional comprehensive hydraulic drill loader |
| 12/11/2013 | CN203334963U Laser drill bit and matched well drilling device |
| 12/11/2013 | CN203334960U Novel drilling plug reaming tool |
| 12/11/2013 | CN203334959U Hole forming device for supporting slope of composite soil-nailed wall |
| 12/11/2013 | CN203334958U Novel coal bed hydraulic broaching safety protection device |
| 12/11/2013 | CN203334957U Waterpower expansion recyclable whipstock for underground coal mine directional drilling |
| 12/11/2013 | CN203334956U Multi-branch horizontal well system suitable for coalbed methane of uniclinal structure |
| 12/11/2013 | CN203334955U Drilling device for horizontal directional drilling penetration |
| 12/11/2013 | CN203334954U Drilling device with laser drill bit |
| 12/11/2013 | CN203334953U Long rod type hole leading pile machine |
| 12/11/2013 | CN203334952U Horizontal well thruster |
| 12/11/2013 | CN103443387A Fluid drilling head with sliding gauging ring |
| 12/11/2013 | CN103437711A Reamer |
| 12/11/2013 | CN103437710A Continuous circulation device and method for operation of assembling casing pipe |
| 12/11/2013 | CN103437709A Method for casing pipe downward running operation through casing pipe driving head |
| 12/11/2013 | CN103437708A Casing pipe driving head suitable for casing pipe well drilling |
| 12/11/2013 | CN103437707A Guiding and locking mechanism suitable for casing pipe driving head |
| 12/11/2013 | CN103437706A Power head structure for horizontal directional drilling machine |
| 12/11/2013 | CN103437705A Directional and quick hole-forming device for mining-coal bed gas extraction multi-branch holes |
| 12/11/2013 | CN103437704A Backup directional rotary steering drilling device |
| 12/11/2013 | CN103437703A Oil-water well oil layer ground control downhole horizontal drilling device |
| 12/11/2013 | CN102619469B Device for hole drilling, seam cutting and pressure relief of coal seam |
| 12/11/2013 | CN102606070B Combined drilling technique of vegetable gum diamond coring and downhole hammer casing drilling |
| 12/11/2013 | CN102134978B Drill hole wall protecting and leakage plugging method or slope guide deviation drilling method and used device thereof |
| 12/11/2013 | CN101910554B Method of drilling a wellbore |
| 12/11/2013 | CN101600852B Automated mse-based drilling apparatus and methods |
| 12/11/2013 | CN101395338B System and method for producing fluids from a subterranean formation |
| 12/10/2013 | US8602689 Retractable nose cone system and method for forming reinforced concrete pilings and/or an electrical grounding system |
| 12/10/2013 | US8602126 Directional drilling control apparatus and methods |
| 12/10/2013 | US8602109 Subsea force generating device and method |
| 12/10/2013 | US8602097 Well assembly with a composite fiber sleeve for an opening |
| 12/10/2013 | CA2749221C Thrust bearing assembly for a wireline-operated directional core barrel drill |
| 12/05/2013 | WO2013181308A1 Assembly and technique for completing a multilateral well |
| 12/05/2013 | WO2013180822A2 Drilling system, biasing mechanism and method for directionally drilling a borehole |
| 12/05/2013 | WO2013180713A1 Systems and methods for optimal positioning of drilling pads |
| 12/05/2013 | US20130324443 Salt-tolerant, thermally-stable rheology modifiers |
| 12/05/2013 | US20130319769 Wellbore reaming tool having locking clutch for drill out after running wellbore tubulars |
| 12/05/2013 | US20130319766 Devices and Methods for Horizontal Directional Drilling with a Boring Tool Library |
| 12/05/2013 | US20130319765 Rock drilling rig and method of driving compressor |
| 12/05/2013 | US20130319764 Drilling system, biasing mechanism and method for directionally drilling a borehole |
| 12/05/2013 | US20130319693 Assembly and technique for completing a multilateral well |
| 12/05/2013 | US20130319653 Wedge deflecting device for sidetracking |
| 12/05/2013 | US20130318909 Portable drilling rig apparatus and assembly method |
| 12/05/2013 | CA2779182A1 Geothermal flexible conduit loop single pass installation system for dense soils and rock |
| 12/04/2013 | EP2669464A1 A clean-out tool for cleaning out a well bore and a method for cleaning out a well bore using such a clean-out tool |
| 12/04/2013 | EP2669463A1 A rock drilling rig and method of driving compressor |
| 12/04/2013 | EP2519707B1 Downhole guiding tool |
| 12/04/2013 | CN203321460U Horizontal well subsection gravel packing tool |
| 12/04/2013 | CN203321361U Near-bit stabilizer |
| 12/04/2013 | CN203321346U Truck-mounted drilling rig |
| 12/04/2013 | CN203321343U Pull type chassis of all-hydraulic drilling rig |
| 12/04/2013 | CN203321325U Power reaming down-hole motor for horizontal directional drilling |
| 12/04/2013 | CN203321324U Underground coal mine seam drilling and cavitating device |
| 12/04/2013 | CN203321323U Downhole borehole expanding and reaming tool for petroleum drilling |