| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 11/13/2013 | CN203285335U Expansion device for underground branch device |
| 11/13/2013 | CN203285334U Radial horizontal well steering device |
| 11/13/2013 | CN203285333U Full hydraulic rotation lifting type vehicle-mounted drilling and workover rig |
| 11/13/2013 | CN203285332U Pit digging tool for electric pole |
| 11/13/2013 | CN103388453A Double rotation speed method and device for controlling reaming-while-drilling bit pressure distribution relation |
| 11/13/2013 | CN103388452A Construction method for ground-source side heat-exchange well of ground-source heat pump system under complex geological condition |
| 11/13/2013 | CN102213094B Construction system and construction method for mine rock drivage |
| 11/13/2013 | CN102003137B Drilling equipment and method |
| 11/13/2013 | CN101796260B Apparatus and method of loading a rod box for a horizontal directional drill |
| 11/12/2013 | US8579044 Bending of a shaft of a steerable borehole drilling tool |
| 11/12/2013 | US8579033 Rotating and reciprocating swivel apparatus and method with threaded end caps |
| 11/12/2013 | CA2679561C Reservoir stimulation while running casing related applications |
| 11/07/2013 | WO2013165679A1 Heat treatment for removal of bauschinger effect or to accelerate cement curing |
| 11/07/2013 | WO2013165612A1 Steerable gas turbodrill |
| 11/07/2013 | WO2013165434A1 Explosive device booster assembly and method of use |
| 11/07/2013 | WO2013165342A1 Wellbore casing section with moveable portion for providing a casing exit |
| 11/07/2013 | WO2013023755A3 Clamping chain |
| 11/07/2013 | WO2013007269A3 An improved directional drilling tool |
| 11/07/2013 | WO2012177926A3 Liner top packer for liner drilling |
| 11/07/2013 | WO2012069858A3 Downhole drilling tool and bearing assembly |
| 11/07/2013 | WO2002085821A3 In situ recovery from a relatively permeable formation containing heavy hydrocarbons |
| 11/07/2013 | US20130292181 Directional drilling |
| 11/07/2013 | US20130292179 Drive device and method for driving a drill rod |
| 11/07/2013 | US20130292174 Composite liners for perforators |
| 11/06/2013 | EP2659090A1 Methods for drilling and stimulating subterranean formations for recovering hydrocarbon and natural gas resources |
| 11/06/2013 | EP2659082A1 Subsea pressure control system |
| 11/06/2013 | CN203271591U Spline type clutch transmission device |
| 11/06/2013 | CN203271590U Oil pipe follow-up device of drilling machine |
| 11/06/2013 | CN203271589U Controlled directional drilling guide system |
| 11/06/2013 | CN203271588U Wheel type truck-mounted drilling rig |
| 11/06/2013 | CN203271587U Drilling-type fast pore-forming system |
| 11/06/2013 | CN103382809A Vehicle-mounted electric hydraulic vibratory well drilling machine |
| 11/06/2013 | CN102561947B Vibroflotation lead hole construction method based on pneumatic drill slag stirring |
| 11/06/2013 | CN102418475B Telescopic arm open-cut rock drilling jumbo with drill rod replacing device |
| 11/06/2013 | CN102168545B Coiled tubing supercritical CO2 jet fracturing method |
| 11/06/2013 | CN101824962B Method for soil mass supporting construction by jet mixing drilling tool |
| 11/06/2013 | CN101718170B Performing six-grade branch well system tool |
| 11/06/2013 | CN101718169B Method for implementing six-stage multilateral well completion by posterior inferior three-way branching mechanism |
| 11/06/2013 | CN101603411B Drilling rig and drilling method |
| 11/06/2013 | CN101573506B Offshore universal riser system |
| 11/05/2013 | US8573328 Hydrocarbon well completion system and method of completing a hydrocarbon well |
| 11/05/2013 | US8573305 Pull-head release mechanism for bend stiffener connector |
| 11/05/2013 | CA2748994C Downhole hydraulic jetting assembly, and method for stimulating a production wellbore |
| 11/05/2013 | CA2732675C Downhole hydraulic jetting assembly, and method for stimulating a production wellbore |
| 11/05/2013 | CA2724787C Apparatus and methods for anchoring and orienting equipment in well casing |
| 10/31/2013 | WO2013163250A2 Substructure of a mobile drilling rig with a movable center floor section |
| 10/31/2013 | WO2013162490A1 Method and apparatus for expendable tubing-conveyed perforating gun |
| 10/31/2013 | WO2013162377A1 Drilling device and method for using the same |
| 10/31/2013 | WO2012156742A3 Drilling apparatus and method |
| 10/31/2013 | WO2012152914A3 Device and method for directional drilling |
| 10/31/2013 | US20130284517 Method and system for radially expanding a tubular element and directional drilling |
| 10/31/2013 | US20130284516 Mechanism For Providing Controllable Angular Orientation While Transmitting Torsional Load |
| 10/31/2013 | US20130284515 Method and apparatus for coupling an earth pipe into the ground, using a solidifying mass |
| 10/31/2013 | US20130284447 Dry Tree Semi-Submersible With Reduced-Height Drilling Floor |
| 10/30/2013 | EP2655783A2 Projection interface techniques |
| 10/30/2013 | EP2655782A1 Directional drilling |
| 10/30/2013 | CN203257330U Horizontal section suspending side tracking tool |
| 10/30/2013 | CN203257329U Dual-power well repairing vehicle |
| 10/30/2013 | CN203257328U Drilling machine for exploiting shale gas |
| 10/30/2013 | CN203257327U Threaded rod reversing underground hydraulic pressurizing well drilling device |
| 10/30/2013 | CN103380259A In situ sampling and analysis system for a drill rig and a drill rig incorporating same |
| 10/30/2013 | CN103375140A Radial horizontal well orienting device and method for operating same |
| 10/30/2013 | CN103375134A Reducing cylinder drill, reducing method for cylinder drill and rotary drilling rig |
| 10/30/2013 | CN102518398B Self-advancing type high-pressure jet sprayer for radial horizontal well drilling |
| 10/30/2013 | CN102226413B Gas extraction method of cross hole drilling area of gas discharge laneway |
| 10/30/2013 | CN101868593B Method of drilling wellbore |
| 10/29/2013 | US8567530 Collapsible rock head and associated structure |
| 10/29/2013 | US8567527 System and method for drilling a borehole |
| 10/29/2013 | US8567526 Wellbore steering based on rock stress direction |
| 10/29/2013 | US8567523 Methods and systems for drilling boreholes |
| 10/29/2013 | US8567522 Apparatus and method for supplying electrical power to an electrocrushing drill |
| 10/29/2013 | US8567508 Wellhead change-out flange and method of use thereof |
| 10/29/2013 | US8567507 Rotating and reciprocating swivel apparatus and method |
| 10/29/2013 | US8567498 System and method for filtering sand in a wellbore |
| 10/29/2013 | CA2727134C Systems and methods using a continuously variable transmission to control one or more system components |
| 10/29/2013 | CA2717774C Shaker deck adjustment apparatus |
| 10/29/2013 | CA2716209C A method and system for installing geothermal heat exchangers, energy piles, concrete piles, micropiles, and anchors using a sonic drill and a removable or retrievable drill bit |
| 10/24/2013 | US20130277118 Method for operating a horizontal drilling device and horizontal drilling device |
| 10/24/2013 | US20130277116 Mud motor with integrated percussion tool and drill bit |
| 10/24/2013 | US20130277108 Energy transfer device |
| 10/23/2013 | EP2653766A2 Pressure compensation ring to be mounted between two propulsion tubes of an underground propulsion tubing system |
| 10/23/2013 | EP2652236A2 Method, system and apparatus for deployment of umbilicals in subsea well operations |
| 10/23/2013 | CN203248092U Inner injection type pressure maintaining ejecting column |
| 10/23/2013 | CN203248076U Horizontal directional drilling transfer case |
| 10/23/2013 | CN203248075U Downhole power pressurizing drilling tool |
| 10/23/2013 | CN203248074U Sidetracking well casing windowing whipstock |
| 10/23/2013 | CN203248073U Hydraulic drill rig pushing mechanism for coal mine |
| 10/23/2013 | CN203248072U Self-walking shale gas drilling machine |
| 10/23/2013 | CN203248071U Hydraulic impulse pressurizing device |
| 10/23/2013 | CN203248070U Rectangular-hole drilling machine |
| 10/23/2013 | CN203248069U Rectangular hole well drill |
| 10/23/2013 | CN203248063U Audio-frequency vibration power head and tractor drilling machine comprising same |
| 10/23/2013 | CN203248062U Integrated power device of truck-mounted drilling rig |
| 10/23/2013 | CN103362462A Integrated vehicle-mounted snubbing operation workover rig |
| 10/23/2013 | CN103362442A Drilling multi-point communication geothermal circulating collection method |
| 10/23/2013 | CN103362441A Novel drill jambo |
| 10/23/2013 | CN103362440A Drill jumbo capable of cutting annular groove in rock mass of driving working face |
| 10/23/2013 | CN103362439A Self-propelled pile driving, pile pulling and drilling integrated machine |
| 10/23/2013 | CN103362436A Hydraulic vertically-lifting trench excavator |
| 10/23/2013 | CN102296974B Rapid maintaining method for broken roof in stope |