| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 06/19/2013 | CN103161403A Excavator with rotary drilling rig |
| 06/19/2013 | CN103161402A Pressure relief method of coal bed high-pressure waterpower bedding drilling and cutting |
| 06/19/2013 | CN102305035B Device for adjusting centration of complete vehicle-mounted service machine to wellhead |
| 06/19/2013 | CN102071921B Underground drilling and fracturing-integrated staged fracturing device and gas drainage process |
| 06/19/2013 | CN101629473B Wing rib driving mechanism of rotary steering drilling tool |
| 06/19/2013 | CN101435312B Multifunctional hammer drill |
| 06/18/2013 | US8464811 Steerable system |
| 06/18/2013 | US8464810 Method of modifying drilling pattern, rock drilling rig, and software product |
| 06/18/2013 | US8464808 Method and device for controlling a rock drill rig |
| 06/18/2013 | US8464794 Wellbore laser operations |
| 06/18/2013 | US8464793 Flow control system with sand screen |
| 06/18/2013 | US8464784 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 06/18/2013 | US8464525 Subsea power fluid recovery systems |
| 06/18/2013 | CA2617435C Starter car for a drilling device |
| 06/13/2013 | WO2013085822A2 Resonant extractor system and method |
| 06/13/2013 | WO2012177781A3 Adjustable bent drilling tool having in situ drilling direction change capability |
| 06/13/2013 | US20130146363 Apparatus for directional control of a drilling tool |
| 06/13/2013 | US20130146362 Oil and Gas Enhancement System - Radial Drilling Method |
| 06/13/2013 | US20130146361 Apparatuses and methods for stabilizing downhole tools |
| 06/13/2013 | US20130146360 Resonant extractor system and method |
| 06/13/2013 | US20130146358 Processes and systems for drilling a borehole |
| 06/13/2013 | CA2858548A1 Resonant extractor system and method |
| 06/12/2013 | CN202991899U Drilling machine power transmission assembly |
| 06/12/2013 | CN202990856U Bottom ultrahigh-pressure pulse jet assisted rock-breaking speed-increasing system |
| 06/12/2013 | CN202990855U Guiding and positioning device for light-exposure punching in inclined plane of crane girder |
| 06/12/2013 | CN202990854U Oil hydraulic system for crawler-type full-hydraulic underground drill rig |
| 06/12/2013 | CN202990853U Oil rig dynamical system |
| 06/12/2013 | CN202990852U Compact land petroleum drilling machine |
| 06/12/2013 | CN202990844U Annular drilling and blasting rack used for tunnel blasting construction |
| 06/12/2013 | CN202990842U Annular drilling and blasting device used for tunnel blasting construction |
| 06/12/2013 | CN202987303U Draper-type brake driller room |
| 06/12/2013 | CN103154417A Horizontal drilling device |
| 06/12/2013 | CN103148061A Horizontal directional driller hydraulic pressure electric joint control system |
| 06/12/2013 | CN103147690A Multifunctional drill carriage |
| 06/12/2013 | CN103147689A Multifunctional rotary drilling rig |
| 06/12/2013 | CN103147688A A method for facilitating construction of a drilling rig |
| 06/12/2013 | CN103147687A Ring-type cutting method for excavating rocks at bottom part of pit shaft of bored pile |
| 06/12/2013 | CN102140888B Excavating drilling machine |
| 06/12/2013 | CN102080502B Sediment pulling device of non-excavated guide driller |
| 06/12/2013 | CN102003143B Multidirectional hydraulic rock drilling machine with integrated drives |
| 06/12/2013 | CN101832103B Movable two-arm hanging wall anchor rod and anchor cable construction drill carriage |
| 06/11/2013 | US8459376 System for drilling under balanced wells |
| 06/11/2013 | US8459375 Tools for use in drilling or enlarging well bores having expandable structures and methods of making and using such tools |
| 06/11/2013 | CA2710204C Directional drilling system |
| 06/06/2013 | WO2013081808A1 Marine isolation assembly |
| 06/06/2013 | US20130140092 Cab module for a mining machine |
| 06/06/2013 | US20130140091 Construction work unit and method for erecting a mast |
| 06/06/2013 | US20130140090 Cutting Element, Cutter Tool and Method of Cutting Within a Borehole |
| 06/06/2013 | US20130140088 Formation Dip Geo-Steering Method |
| 06/06/2013 | US20130140086 Apparatus and method for supplying electrical power to an electrocrushing drill |
| 06/06/2013 | US20130140019 Releasably lockable, retrievable, mule shoe assembly |
| 06/06/2013 | DE102012104949B3 Drilling device for drilling directionally-controlled hole in ground for pipeline, has control ring and screw that are coupled with one another by axial shift of screw to rotate control ring by rotation of screw inversely to casing tube |
| 06/06/2013 | CA2856578A1 Marine isolation assembly |
| 06/06/2013 | CA2847831A1 Improved wireline drilling system |
| 06/06/2013 | CA2760931A1 Releasably lockable, retrievable, mule shoe assembly |
| 06/05/2013 | CN202970513U Positioning and orientation technique pipe for main and branch well bore connection position of multilateral well |
| 06/05/2013 | CN202970476U Hydraulic pressure alarm serial-connecting type drilling reamer for geology core misering |
| 06/05/2013 | CN202970475U Hydraulic pressure alarm hydraulic drive sleeve expander for geology core misering |
| 06/05/2013 | CN202970474U Transmission shaft mechanism appropriate for hole opener |
| 06/05/2013 | CN202970473U Device for punching and flushing |
| 06/05/2013 | CN202970472U Expansion pipe locating whipstock |
| 06/05/2013 | CN202970471U Cutting angle adjustment device for irregular concrete drill hole |
| 06/05/2013 | CN202970470U Positioning and balancing device for gadder in drilling |
| 06/05/2013 | CN202970469U Perpendicularity positioner of electric transmission line pole and tower compound foundation drill hole |
| 06/05/2013 | CN202970468U Hydraulic pressure walking type chassis |
| 06/05/2013 | CN202970467U Long spiral drilling machine |
| 06/05/2013 | CN202970466U Connection structure of long spiral drilling machine beam and vehicle frame |
| 06/05/2013 | CN202970465U Walking boot |
| 06/05/2013 | CN202970464U Walking-type long spiral drilling machine and transfer assembly thereof |
| 06/05/2013 | CN202970463U Tandem-type walking mechanism |
| 06/05/2013 | CN202970462U Drill carriage with horizontally pushed drilling mechanism |
| 06/05/2013 | CN202970461U Modularly-designed deep-hole drill rig for coal mines |
| 06/05/2013 | CN202970460U Wheeled drilling machine |
| 06/05/2013 | CN202970459U Long spiral drilling rig and travelling mechanism thereof |
| 06/05/2013 | CN202970458U Two-way chain lifting device for drill carriage |
| 06/05/2013 | CN202970457U Hydraulic folding driller operating room |
| 06/05/2013 | CN202970456U System for boring hard rock for once |
| 06/05/2013 | CN202970431U Drilling mechanism for mine rock drilling tunneling |
| 06/05/2013 | CN202966444U Engine cover and rotary drilling rig using engine cover |
| 06/05/2013 | CN103140644A Unconditionally stable floating offshore platforms |
| 06/05/2013 | CN103140643A Boring machine having head part |
| 06/05/2013 | CN103132923A Integrated high-wind-pressure down-the-hole drill |
| 06/05/2013 | CN103132908A Device for drilling rock and embedding rock-socketed prestressed pipe pile by down-hole hammer and construction method of device |
| 06/05/2013 | CN102268966B Hard rock crushing drill bit and method for crushing hard rock |
| 06/05/2013 | CN102235153B Method for directionally drilling inclined hole in steeply-inclined stratum |
| 06/05/2013 | CN102182401B Folding type fully hydraulic crawler pile driver |
| 06/05/2013 | CN102159770B Deep water pile system and method |
| 06/05/2013 | CN101967989B Crawler travel anchor transporting machine |
| 06/05/2013 | CN101755103B Method and apparatus for establishing a manual governor control setting in an electro-hydraulic system |
| 06/05/2013 | CN101718175B Universal joint device for ocean deepwater drilling |
| 06/04/2013 | US8453765 Apparatus for directional control of a drilling tool |
| 06/04/2013 | US8453763 Expandable earth-boring wellbore reamers and related methods |
| 06/04/2013 | US8453762 Regenerative drive mechanism for hydraulic feed cylinders in hydrostatic or hydraulic circuits |
| 06/04/2013 | US8453761 Resonance enhanced drilling: method and apparatus |
| 06/04/2013 | US8453760 Method and apparatus for controlling bottomhole temperature in deviated wells |
| 06/04/2013 | US8453759 Method of directing drilling pattern in curved tunnels, rock drilling rig, and software product |
| 05/30/2013 | WO2013077905A2 Systems and methods for continuous and near continuous drilling |
| 05/30/2013 | WO2013077595A1 Seabed drilling and vertical shaft construction method |
| 05/30/2013 | US20130133951 Erosion Resistant Hard Composite Materials |
| 05/30/2013 | US20130133950 Apparatus and Methods Utilizing Progressive Cavity Motors and Pumps with Rotors and/or Stators with Hybrid Liners |