| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 04/24/2013 | CN103061673A Multifunctional micropile drilling machine |
| 04/24/2013 | CN103061672A Construction device |
| 04/24/2013 | CN103061671A Underground anti-drag twisting reducer |
| 04/24/2013 | CN103061670A Structure for preventing collapse of boreholes in pebble bed and construction method thereof |
| 04/24/2013 | CN103061669A Large-through-hole power head with brake function of coal mine directional drilling machine |
| 04/24/2013 | CN103061667A Water hammer type well drill |
| 04/24/2013 | CN103058098A Hinge type multifunctional operation machine |
| 04/24/2013 | CN102226375B Method for forming easy-to-collapse drilled hole |
| 04/24/2013 | CN102220863B Valve-controlled automatic confluence hydraulic system for horizontal directional drilling machine |
| 04/24/2013 | CN102182396B Core drilling machine power head capable of keeping off opening orifice |
| 04/24/2013 | CN102168575B Loose blasting gas extraction technology for horizontal branch well of coal seam floor |
| 04/24/2013 | CN101832102B Movable two-platform partitioned four-arm hanging wall anchor rod and anchor cable construction drill carriage |
| 04/24/2013 | CN101787854B Subsection well completion system of bottom water reservoir horizontal well |
| 04/24/2013 | CN101324174B Method for preventing well drilling riser pipe and drill stem from generating resonance |
| 04/23/2013 | US8424620 Apparatus and method for lateral well drilling |
| 04/23/2013 | US8424617 Methods and apparatus for delivering high power laser energy to a surface |
| 04/23/2013 | CA2738008C Modular rotary drill head |
| 04/23/2013 | CA2693687C Mechanical and fluid jet drilling method and apparatus |
| 04/18/2013 | WO2013055576A1 Apparatus and method for determining the direction east |
| 04/18/2013 | WO2013055226A1 Device and method for controlling return flow from a bore hole |
| 04/18/2013 | WO2012138912A4 Offshore top tensioned riser buoyancy can system and methods of field development |
| 04/18/2013 | US20130092441 Steering Head with Integrated Drilling Dynamics Control |
| 04/18/2013 | US20130092440 Boring tool tracking fundamentally based on drill string length, pitch and roll |
| 04/17/2013 | CN202882764U Precision casting idler wheel short piece |
| 04/17/2013 | CN202882763U Drilling hole deviation rectifying device of multi-anchoring-point anchor rod without resin |
| 04/17/2013 | CN202882762U Rotational flow auxiliary angle-building tool |
| 04/17/2013 | CN202882761U Horizontal well deflecting tool |
| 04/17/2013 | CN202882760U Ball type drilling guide device |
| 04/17/2013 | CN202882759U Running gear for full-casing full-rotary drill |
| 04/17/2013 | CN202882758U Small agricultural well drilling machine |
| 04/17/2013 | CN202882757U Walking type full slewing drilling machine |
| 04/17/2013 | CN202882756U Hand pressure assisting device used for drilling holing machine |
| 04/17/2013 | CN202877225U Multifunctional drilling-type contaminated soil in-situ remediation equipment with arc-shaped stirring frames |
| 04/17/2013 | CN103052720A Holding device for a drill rod of a tap hole drilling machine and method for removing a drill rod |
| 04/17/2013 | CN103046870A Percussion drill suitable for construction under complex sea area condition |
| 04/17/2013 | CN103046869A Construction method for controlling drilling positions to penetrate through guide rock strata |
| 04/17/2013 | CN103046868A Integrated horizontal well geosteering method |
| 04/17/2013 | CN103046866A Universal rotating drilling machine |
| 04/17/2013 | CN102364028B Multifunctional full-hydraulic drilling machine |
| 04/17/2013 | CN102146772B Rotary locking piece type drilling riser connector |
| 04/17/2013 | CN101881150B Hydraulic cutting nozzle with residue filer device |
| 04/17/2013 | CN101321846B Remotely controlled decoking tool used in coke cutting operations |
| 04/16/2013 | US8418783 Boom arrangement for a rock drill and rock drill rig |
| 04/16/2013 | US8418782 Method and system for precise drilling guidance of twin wells |
| 04/16/2013 | US8418765 Combined piloting method of remote operated underwater vehicles, device for its implementation and system using the same |
| 04/16/2013 | US8418618 Method and apparatus for small-charge blasting |
| 04/11/2013 | WO2013052474A1 Electro-hydraulic drilling with shock wave reflection |
| 04/11/2013 | WO2013051611A1 Laser drill device |
| 04/11/2013 | WO2013050672A1 Means and method for the stabilization and energy storage of a directional drilling system |
| 04/11/2013 | US20130087386 Expandable apparatus and related methods |
| 04/11/2013 | US20130087385 Method for detecting and mitigating drilling inefficiencies |
| 04/11/2013 | US20130087338 Wellbore operations using controlled variable density fluid |
| 04/11/2013 | DE102011115453A1 Bitless drilling system of rock, has drilling rig which is suspended at lower end of borehole wall, and is moved along drilling direction during the drilling process |
| 04/10/2013 | EP2578794A1 Mast for drilling rigs and method of assembling the same |
| 04/10/2013 | EP2576304A1 Rock drilling rig and method for downhill drive |
| 04/10/2013 | EP2576281A1 Rock drilling rig and method for positioning the same |
| 04/10/2013 | EP2576261A1 Rock drilling rig, method for controlling the temperature of its drive equipment, and liquid cooling system |
| 04/10/2013 | CN202867370U Rotation and variation amplitude oil hydraulic circuit used for hydraulic pressure drilling carriage |
| 04/10/2013 | CN202866674U Full-hydraulic crawler-type deep hole drilling car power shaft |
| 04/10/2013 | CN202866667U Dowel type tool joint passing rotary plate redressing device |
| 04/10/2013 | CN202866657U Drilling tool vibrator of horizontal well |
| 04/10/2013 | CN202866656U Drilling machine tool face locating device |
| 04/10/2013 | CN202866655U Engineering driller drilling automatic position correcting device |
| 04/10/2013 | CN202866654U Train type automatic translating device for drilling machine |
| 04/10/2013 | CN202866653U Drilling machine double-main-rod guide rail type hydraulic lifting mechanism |
| 04/10/2013 | CN202866652U Rock drilling jumbo |
| 04/10/2013 | CN202866651U Narrow-body full hydraulic anchor bolt anchor cable drill carriage for coal mine tunnel |
| 04/10/2013 | CN202866650U External unlocking boosting control loop |
| 04/10/2013 | CN202866649U Excavator with drilling jig function |
| 04/10/2013 | CN202866648U Rotation locking device for rotary drilling rig |
| 04/10/2013 | CN202866647U Perpendicular positioning drilling machine for road maintenance |
| 04/10/2013 | CN202866646U Drill mast type engineering driller equipped with hydraulic lifting device |
| 04/10/2013 | CN202866645U Coal mine frame column type emulsion drilling machine |
| 04/10/2013 | CN202866640U Rotating assembly driver for gas drilling by using top drive |
| 04/10/2013 | CN202865842U Multifunctional pile establishing machine |
| 04/10/2013 | CN103032394A Hydraulic system of pipe rolling device and rotary-excavating drilling machine |
| 04/10/2013 | CN103032025A Underground coal mine multipurpose overall crawler type full-hydraulic directional drilling machine |
| 04/10/2013 | CN103032024A Mining continuous drilling machine |
| 04/10/2013 | CN103032022A Novel high-efficiency long auger drilling machine |
| 04/10/2013 | CN102606069B Control device for phases in wellbore of supercritical carbon dioxide drilled well |
| 04/10/2013 | CN102305021B Experimental method for simulating dynamic mechanics characteristic of underground drilling rig of air well drilling |
| 04/10/2013 | CN102213076B Vertical shaft type drilling machine with long feeding travel |
| 04/10/2013 | CN101818620B Mining method for maximum reservoir contact well |
| 04/10/2013 | CN101761311B Underwater geotechnical drilling equipment and underwater geotechnical exploration method |
| 04/09/2013 | US8413725 Subsea fluid separator |
| 04/09/2013 | US8413722 Method for circulating a fluid entry out of a subsurface wellbore without shutting in the wellbore |
| 04/09/2013 | CA2668291C System for mounting a pile driver |
| 04/04/2013 | WO2012166400A3 Wellbore junction completion with fluid loss control |
| 04/04/2013 | US20130081877 Extendable pilot bit for barrel cutter |
| 04/04/2013 | US20130081876 Optical power for self-propelled mineral mole |
| 04/04/2013 | US20130081875 Umbilical technique for robotic mineral mole |
| 04/04/2013 | US20130081874 Electro-Hydraulic Drilling With Shock Wave Reflection |
| 04/04/2013 | US20130081820 Hostile environment stable compositions and drilling and fracturing fluids containing same |
| 04/04/2013 | CA2850018A1 Point the bit rotary steerable system |
| 04/03/2013 | CN202850873U Drilling machine |
| 04/03/2013 | CN202850861U Lateral extension drilling device for mine support |
| 04/03/2013 | CN202850860U Grouting air exhausting device |
| 04/03/2013 | CN202850859U Controlled hydraulic drilling supporting operation device for mine |
| 04/03/2013 | CN202850858U Hollow spherical joint connection radial well jet drilling well oriented steering tool |
| 04/03/2013 | CN202850857U Extensible driving shed used for horizontal directional drilling machine |