| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 07/07/2011 | US20110162889 Boring tool control using remote locator |
| 07/07/2011 | US20110162887 Inserting and extracting underground sensors |
| 07/07/2011 | CA2786003A1 Side-tracking system and related methods |
| 07/07/2011 | CA2785939A1 Downhole guiding tool |
| 07/07/2011 | CA2784670A1 Mining vehicle and method for its energy supply |
| 07/07/2011 | CA2783724A1 Mining vehicle and method for its energy supply |
| 07/07/2011 | CA2783203A1 Rock drilling device |
| 07/07/2011 | CA2781353A1 Timed impact drill bit steering |
| 07/06/2011 | EP2245256B1 Method and device for creating a deep borehole |
| 07/06/2011 | CN201891419U Positioning and guiding device for parallel cut |
| 07/06/2011 | CN201891381U Horn mouth special for marine module drilling rig |
| 07/06/2011 | CN1727636B Method and system for accessing subterranean deposits from the surface |
| 07/06/2011 | CN102116168A Gas drainage system and method for hyposmosis soft coal seams |
| 07/06/2011 | CN102116140A Construction method for enhancing extraction effect of ground coal bed gas |
| 07/06/2011 | CN102116136A Reverse circulation drill and gripper for same |
| 07/06/2011 | CN101614133B High pressure jet drilling and slotting integration pressure-release anti-burst method |
| 07/06/2011 | CN101094964B Tool for excavating an object |
| 07/05/2011 | US7971662 Drill bit with adjustable steering pads |
| 07/05/2011 | US7971658 Chemically Enhanced Stimulation of oil/gas formations |
| 07/05/2011 | US7971645 Four mill bottom hole assembly |
| 06/30/2011 | WO2011078421A1 Air hammer for a boring machine |
| 06/30/2011 | WO2011077201A2 System and method for torque stabilization of a drilling system |
| 06/30/2011 | WO2011076851A1 Method of drilling and abrasive jet drilling assembly |
| 06/30/2011 | WO2011076848A1 Determining a property of a formation material |
| 06/30/2011 | WO2011076847A1 Drilling a borehole and hybrid drill string |
| 06/30/2011 | WO2011076846A1 Method of drilling and jet drilling system |
| 06/30/2011 | WO2011076845A1 Method of drilling and jet drilling system |
| 06/30/2011 | WO2011041685A3 Milling tool for establishing openings in wellbore obstructions |
| 06/30/2011 | WO2011041553A3 Tools for use in drilling or enlarging well bores having expandable structures and methods of making and using such tools |
| 06/30/2011 | WO2011041174A3 Earth boring tools having expandable members |
| 06/30/2011 | US20110155469 Apparatus and Method for Positioning Extended Lateral Channel Well Stimulation Equipment |
| 06/30/2011 | US20110155468 Side-tracking system and related methods |
| 06/30/2011 | US20110155467 Timed impact drill bit steering |
| 06/30/2011 | US20110155466 Varied rpm drill bit steering |
| 06/30/2011 | US20110155465 Retractable Underreamer |
| 06/30/2011 | US20110155386 Multi-Deployable Subsea Stack System |
| 06/30/2011 | US20110155379 Rotating continuous flow sub |
| 06/30/2011 | DE10224906B4 Teleskopierbares Bohr- und Ankersetzgerät The telescopic drilling and bolting device |
| 06/30/2011 | CA2785141A1 Drilling a borehole and hybrid drill string |
| 06/30/2011 | CA2784992A1 Method of drilling and abrasive jet drilling assembly |
| 06/30/2011 | CA2784989A1 Determining a property of a formation material |
| 06/30/2011 | CA2784979A1 Air hammer for a boring machine |
| 06/30/2011 | CA2784978A1 Method of drilling and jet drilling system |
| 06/30/2011 | CA2784545A1 Method of drilling and jet drilling system |
| 06/30/2011 | CA2689470A1 System and apparatus for directing the drilling of a well |
| 06/29/2011 | EP2339109A2 Earth drilling tool and method |
| 06/29/2011 | EP2339108A1 System for handling equipments for the drilling of the ground |
| 06/29/2011 | EP2339107A2 Drilling device with telescopic auger, adapter piece and drilling method for drilling |
| 06/29/2011 | EP2337921A1 Articulation assembly for moving a drill mast |
| 06/29/2011 | EP2337918A1 Method and drilling apparatus for down-the-hole drilling |
| 06/29/2011 | EP1888878B1 Method and device for drilling, particularly percussion drilling or rotary percussion drilling a hole in soil or rock material |
| 06/29/2011 | CN201884033U Constant-pressure compound sealing structure of mining deep well rock breaking hob cutter |
| 06/29/2011 | CN201883941U Novel submersible drilling machine |
| 06/29/2011 | CN201883940U Electrically-driven lifting punching machine |
| 06/29/2011 | CN201883939U Energy storage type fully electrically-driven workover rig cab instrument panel |
| 06/29/2011 | CN201883938U Multidirectional hydraulic deep hole drill carriage |
| 06/29/2011 | CN201883934U Hydraulic lifting type roof punching machine |
| 06/29/2011 | CN102108836A Punch die |
| 06/29/2011 | CN101538987B Anchoring drilling machine based on working mode of double-pump complementation automatic merging |
| 06/28/2011 | US7968184 Erosion resistant surface and method of making erosion resistant surfaces |
| 06/28/2011 | US7967082 Downhole mechanism |
| 06/28/2011 | US7967080 Boring tool tracking fundamentally based on drill string length, pitch and roll |
| 06/23/2011 | WO2011008680A4 Stabilizer subs for use with expandable reamer apparatus, expandable reamer apparatus including stabilizer subs and related methods |
| 06/23/2011 | US20110147090 Multi-functional machine adaptable for drilling, boring and lifting |
| 06/23/2011 | US20110147089 Drill bit with an adjustable steering device |
| 06/23/2011 | US20110147088 Apparatus and method for controlling the feed-in speed of a high pressure hose in jet drilling operations |
| 06/23/2011 | US20110147086 Downhole tools with electro-mechanical and electro-hydraulic drives |
| 06/23/2011 | US20110147085 Rotation inhibiting apparatus |
| 06/23/2011 | US20110147084 Method and an arrangement for controlling a rock drill |
| 06/23/2011 | US20110147083 Analyzing Toolface Velocity to Detect Detrimental Vibration During Drilling |
| 06/23/2011 | US20110147082 System For Tracking And Maintaining An On-Grade Horizontal Borehole |
| 06/22/2011 | EP2336481A1 Multifunction machine adaptable for drilling, boring and lifting |
| 06/22/2011 | EP2334993A1 System and method for geothermal conduit loop in-ground installation and soil penetrating head therefor |
| 06/22/2011 | EP2115338B1 Method for laying pipes in the ground |
| 06/22/2011 | EP1977073B1 Steerable drilling system |
| 06/22/2011 | CN201874605U Remote control underground gas drainage drilling machine |
| 06/22/2011 | CN201874603U High-pressure and small-jet device for preventing and controlling outburst of coal and gas |
| 06/22/2011 | CN201874477U Hydraulic support self-locking device |
| 06/22/2011 | CN201874463U Safety anti-deviation drilling tool with half-piece type centralizers |
| 06/22/2011 | CN201874462U Flexible pressurizing drilling tool capable of correcting and preventing deviation |
| 06/22/2011 | CN201874461U Anti-deviation straightening while-drilling composite drilling device |
| 06/22/2011 | CN201874460U One-trip drilling tool for directional well |
| 06/22/2011 | CN201874459U Horizontal drilling machine capable of removing obstacles by means of impact |
| 06/22/2011 | CN201874458U Full-automatic lifting electric drilling rig |
| 06/22/2011 | CN201874457U Cluster well drilling machine conveying device |
| 06/22/2011 | CN201874456U Mining water drill |
| 06/22/2011 | CN201874450U Outburst-prevention drilling machine used in coal mine |
| 06/22/2011 | CN102102491A Reverse expansion and reverse pumping method for slurry of horizontal directional drill |
| 06/22/2011 | CN102102490A Method for feeding and expanding forked three-way mechanism based on downward orientation |
| 06/22/2011 | CN101713198B Method and equipment for repairing flaws of clamped sand, splits and defect sites of underground building curtain |
| 06/22/2011 | CA2725976A1 Analyzing toolface velocity to detect detrimental vibration during drilling |
| 06/21/2011 | US7963723 Overdrilling apparatus |
| 06/21/2011 | US7963722 Method for the trenchless laying of pipes |
| 06/21/2011 | US7963348 Expandable earth boring apparatus using impregnated and matrix materials for enlarging a borehole |
| 06/21/2011 | US7963347 Systems and methods for reducing backward whirling while drilling |
| 06/21/2011 | CA2630068C Locking clutch for downhole motor |
| 06/21/2011 | CA2608829C Electronically controlled earth drilling rig |
| 06/16/2011 | WO2011071691A2 Telescopic unit with dissolvable barrier |
| 06/16/2011 | WO2011071586A1 System and method for drilling a well that extends for a large horizontal distance |
| 06/16/2011 | US20110140411 Interlocking engagement mechanism for an adjustable bent housing |