| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 01/29/2014 | CN203412512U Fixing mechanism for horizontal directional drilling machine anchoring device |
| 01/29/2014 | CN203412511U Drilling machine installed on snowmobile |
| 01/29/2014 | CN203412510U Novel portable electric rock drilling machine |
| 01/29/2014 | CN203412509U Base plate anchoring drilling machine |
| 01/29/2014 | CN203412507U Hexagonal drilling machine |
| 01/29/2014 | CN103547767A Vortex controlled variable flow resistance device and related tools and methods |
| 01/29/2014 | CN103547764A Drilling system having slot for underwater storage of BOP assembly |
| 01/29/2014 | CN103541720A Technique for rapid evaluation of gas drilling wellbore stability |
| 01/29/2014 | CN103541674A Hydraulic power pulse device |
| 01/29/2014 | CN103541658A Porous pipe horizontal rotary spraying drill bit |
| 01/29/2014 | CN103541657A Drilling tool and construction method for oil gas well hard formation sidetracking |
| 01/29/2014 | CN102383729B Slurry power bidirectional control hydraulic system for drilling and operation method thereof |
| 01/28/2014 | US8636083 Rock drilling device |
| 01/28/2014 | US8636082 Pile driver |
| 01/28/2014 | CA2621022C A percussion hammer for enlarging drilled holes |
| 01/23/2014 | WO2014015323A1 Inground operations, system, communications and associated apparatus |
| 01/23/2014 | WO2014015158A2 Sliding joint for use with a downhole tool |
| 01/23/2014 | WO2013066695A3 Eccentric sleeve for directional drilling systems |
| 01/23/2014 | US20140020953 Advanced inground operations, system and associated apparatus |
| 01/22/2014 | CN203403822U Back-dragging broaching device with centering device |
| 01/22/2014 | CN203403821U Near-bit reamer used for deep drilling |
| 01/22/2014 | CN203403820U Waterpower oscillator valve plate structure |
| 01/22/2014 | CN203403819U Hydraulic oscillator |
| 01/22/2014 | CN203403818U Float collar for floating casing running of extended reach well |
| 01/22/2014 | CN203403817U Mini-type non-excavation horizontal drilling device |
| 01/22/2014 | CN203403816U Automatic pressure limiting protection system for horizontal directional drilling machine |
| 01/22/2014 | CN203403815U Drilling rig slide platform of hydraulic anchor rod drill carriage for coal mine |
| 01/22/2014 | CN203403814U Stroke compensation mechanism of hydraulic anchor rod drilling carriage power head for coal mine |
| 01/22/2014 | CN203403813U Drill rod drive device for vehicular deep drilling rig |
| 01/22/2014 | CN203403812U Rectangular hole boring machine |
| 01/22/2014 | CN203403811U Drilling machine for square hole |
| 01/22/2014 | CN103527094A Tunnel drilling machine |
| 01/22/2014 | CN103527093A Jet-suction type reverse-circulation reamer for crossing of horizontal directional drilling |
| 01/22/2014 | CN103527092A In-hole jet-suction cuttings removing and reaming method for horizontal directional drilling |
| 01/22/2014 | CN103527091A Pipe sleeve drive device |
| 01/22/2014 | CN103527090A Pipe sleeve drive device |
| 01/22/2014 | CN103527089A Pipe sleeve drive device |
| 01/22/2014 | CN103527088A Pipe sleeve drive device |
| 01/22/2014 | CN103527087A Impact holing method in cast-in-place construction method |
| 01/22/2014 | CN103527086A Coiled tubing radial jetting drilling system |
| 01/22/2014 | CN103527085A High-temperature flame assistant intelligent drilling machine |
| 01/22/2014 | CN103527084A Gravity pointing type vertical well drilling deviation-prevention device |
| 01/22/2014 | CN103527083A Rotary guiding drilling tool |
| 01/22/2014 | CN103527082A Rotary steering tool |
| 01/22/2014 | CN103527081A Efficient soil drilling machine |
| 01/22/2014 | CN103527080A Method and drilling tool for directional-blasting well drilling |
| 01/22/2014 | CN103527079A Method for drilling well for containing explosive serving as seismic source |
| 01/22/2014 | CN103526703A Multifunctional full-hydraulic self-propelled highway crash barrier piling, pulling and drilling all-in-one machine |
| 01/21/2014 | US8631881 Inserting and extracting underground sensors |
| 01/21/2014 | CA2802917C Vibration tool |
| 01/21/2014 | CA2780885C Vibrating downhole tool |
| 01/21/2014 | CA2772587C Rock drilling unit, feed beam, and method for damping vibration |
| 01/16/2014 | WO2014011162A1 Systems and methods for managing milling debris |
| 01/16/2014 | WO2014011114A1 Method and apparatus for energy chain installation |
| 01/16/2014 | US20140014413 Drilling system with flow control valve |
| 01/16/2014 | DE112012000996T5 Fluidbohrkopf mit Gleit-Kalibrierring Fluid drilling head with sliding sizing |
| 01/16/2014 | CA2876166A1 Systems and methods for managing milling debris |
| 01/15/2014 | EP2683907A2 Subsea actuation system |
| 01/15/2014 | CN203394406U Horizontal directional drilling emergency rescue device |
| 01/15/2014 | CN203394361U Gear rack lifting device for coalbed methane drilling machine |
| 01/15/2014 | CN203394351U Radial drilling system |
| 01/15/2014 | CN203394350U Permanent magnet short joint for accurate collision prevention of adjacent wells |
| 01/15/2014 | CN203394349U Recoverable whipstock and combined salvage tool thereof |
| 01/15/2014 | CN203394348U Adjustable pressure guniting short fitting for directional drilling crossing |
| 01/15/2014 | CN203394347U Rotary drilling rigs |
| 01/15/2014 | CN203394345U Ground anchor machine special for traction in power transmission line construction |
| 01/15/2014 | CN203394343U Multifunctional drilling machine for use at high and low altitudes |
| 01/15/2014 | CN103512254A Deep well system used for enhanced geothermal system and boring method thereof |
| 01/15/2014 | CN103510871A Complex structural well drag-reduction wrenching-reduction compound drilling method |
| 01/15/2014 | CN103510855A Horizontal well logging guiding track optimization method |
| 01/15/2014 | CN103510854A Horizontal well target layer dynamic modeling method while drilling |
| 01/15/2014 | CN103510853A Comprehensive guiding method of coal-bed gas horizontal well |
| 01/15/2014 | CN103510852A Rotary drilling rig |
| 01/15/2014 | CN103510851A Movable horizontal drill machine |
| 01/15/2014 | CN103510850A Piling drilling rig |
| 01/15/2014 | CN103510849A Cone drill for cooling drill bit by spraying water |
| 01/15/2014 | CN103510848A Roller cone drilling machine with high-intensity drill rod |
| 01/15/2014 | CN103510847A Roller cone drilling machine capable of controlling jet velocity of compressed gas |
| 01/15/2014 | CN102278068B Method for treating formation water production in gas drilling process |
| 01/15/2014 | CN102149899B Method of cracking rock material, and breaking device |
| 01/15/2014 | CN101965435B A method for facilitating construction of a driling rig |
| 01/15/2014 | CN101881134B Gallery-type vertical and horizontal dual-purpose drilling machine |
| 01/14/2014 | US8627901 Laser bottom hole assembly |
| 01/14/2014 | US8627891 Manifold structure having adjustable brackets |
| 01/14/2014 | US8627889 Drilling and fracturing fluid |
| 01/14/2014 | CA2726969C Systems and methods using a continuously variable transmission to control one or more system components |
| 01/09/2014 | WO2014008483A1 Apparatuses and methods for supplying electrical power to an electrocrushing drill |
| 01/09/2014 | WO2014007809A1 Method of intersecting a first well bore by a second well bore |
| 01/09/2014 | WO2014006204A2 Drilling device and method |
| 01/09/2014 | WO2014005187A1 Laser alignment device for use with a drill rig |
| 01/09/2014 | WO2013162488A3 Wellbore drilling assembly |
| 01/09/2014 | US20140008968 Apparatuses and methods for supplying electrical power to an electrocrushing drill |
| 01/09/2014 | US20140008130 Wellbore Casing Section with Moveable Portion for Providing a Casing Exit |
| 01/09/2014 | US20140008129 Multidirectional wellbore penetration system and methods of use |
| 01/09/2014 | US20140008127 Downhole drilling force assembly and method of using same |
| 01/09/2014 | US20140008125 System and method for kicking-off a rotary steerable |
| 01/09/2014 | US20140008124 Drilling technology |
| 01/09/2014 | CA2878237A1 Laser alignment device for use with a drill rig |
| 01/09/2014 | CA2877788A1 Apparatuses and methods for supplying electrical power to an electrocrushing drill |
| 01/08/2014 | EP2682561A2 Multidirectional wellbore penetration system and methods of use |