| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 12/04/2013 | CN203321322U Friction resistance reducing tool capable of extending drilling footage |
| 12/04/2013 | CN203321321U Hydraulic power skid-mounted structure provided with fork holes |
| 12/04/2013 | CN203321320U In-hole deviation rectifying device for unit trough section of underground continuous wall |
| 12/04/2013 | CN203321319U Drilling machine |
| 12/04/2013 | CN203321318U Pull type all-hydraulic drilling rig |
| 12/04/2013 | CN203321317U Pull type integrated drilling rig for tower crane |
| 12/04/2013 | CN203321316U Bidirectional movement device of drilling machine |
| 12/04/2013 | CN203321315U Mining pneumatic drilling machine |
| 12/04/2013 | CN203321309U Hydraulic drill carriage propelling device for coal mine |
| 12/04/2013 | CN103429838A Fluid drilling head nozzle design |
| 12/04/2013 | CN103422814A Three-dimensional waterpower vibrator for petroleum drilling |
| 12/04/2013 | CN103422813A Single-well coal bed gas multi-branch horizontal well system and well drilling method |
| 12/04/2013 | CN103422812A Single-well coal bed gas multi-branch horizontal well drilling and completion method |
| 12/04/2013 | CN102619470B Method for controlling transverse vibration of drill string in process of reaming while drilling |
| 12/04/2013 | CN102587828B Gas extraction and drilling cooperative drilling and protecting integrated system for soft coal seams and process |
| 12/04/2013 | CN102493764B Integrated drilling machine capable of being quickly detached and hung on excavator working arm |
| 12/04/2013 | CN102434103B Two-in-one dual-effect rotatable sleeve hole expanding device |
| 12/03/2013 | US8596386 System and method for drilling and completing lateral boreholes |
| 12/03/2013 | CA2655200C Modular geosteering tool assembly |
| 11/28/2013 | WO2013177568A1 Service line transport and deployment system |
| 11/28/2013 | WO2013122547A3 Riser protection structure |
| 11/28/2013 | US20130313021 Hybrid Drill Bits Having Increased Drilling Efficiency |
| 11/28/2013 | US20130313020 Method and device for drilling a pit or passage, and flexible tube therefor |
| 11/28/2013 | US20130312973 Methods for Drilling and Stimulating Subterranean Formations for Recovering Hydrocarbon and Natural Gas Resources |
| 11/28/2013 | DE102008038964B4 Bewegbare Geräteeinheit zum Erzeugen einer Durchörterung in Böden und Auffüllungen Movable equipment unit for generating a drilling through soils and fills |
| 11/27/2013 | EP2665883A1 Method and system of drilling laterals in shale formations |
| 11/27/2013 | CN203308382U Portable full-hydraulic core drilling machine |
| 11/27/2013 | CN203308381U Hollow drill rod drilling unit for drilling holes in ground |
| 11/27/2013 | CN203308380U Trench excavator for fixing suspension type electric power pole |
| 11/27/2013 | CN203308379U Drilling machine for pile work |
| 11/27/2013 | CN103415673A Method and system for radially expanding a tubular element and directional drilling |
| 11/27/2013 | CN103410587A Floor anchoring drilling machine with mufflers |
| 11/27/2013 | CN103410446A Reaming inclinometry way-type drilling unit |
| 11/27/2013 | CN103410445A All-cross-section cutting rectangular pipe-pushing machine cutting mechanism |
| 11/27/2013 | CN103410444A Waterpower oscillator |
| 11/27/2013 | CN103410443A Well drilling method and device combining heat energy and mechanical energy |
| 11/27/2013 | CN103410442A Full hydraulic crawler-type drilling machine with high rotation speed for coal mines |
| 11/27/2013 | CN103410441A Rotary coal mine underground tunnel drilling rig with small platform |
| 11/27/2013 | CN103410440A Wriggling tunneling type star soil sneaking device |
| 11/27/2013 | CN103410432A Hexagonal drilling machine |
| 11/27/2013 | CN103410142A Construction method for cast-in-place pile through punching and base expanding and base expanding device |
| 11/27/2013 | CN102587831B Mine cutting drill with extended drilling arms and convenient in transportation |
| 11/27/2013 | CN102392601B Method for determining hole trajectory of multi-target horizontal well |
| 11/26/2013 | US8590638 Intelligent wellbore propagation system |
| 11/26/2013 | US8590637 Apparatus and method for controlling the feed-in speed of a high pressure hose in jet drilling operations |
| 11/26/2013 | US8590636 Rotary steerable drilling system |
| 11/26/2013 | CA2754452C Hydraulically released window mill |
| 11/26/2013 | CA2648695C Method and apparatus for lateral well drilling utilizing an abrasive fluid stream discharged from a rotating nozzle |
| 11/21/2013 | WO2013108051A3 Device for a drainage boring system |
| 11/21/2013 | US20130306377 Methods of drilling a subterranean bore hole |
| 11/21/2013 | US20130306376 Pressure balanced fluid operated reaming tool for use in placing wellbore tubulars |
| 11/21/2013 | US20130306374 Communication system for extended reach wells |
| 11/21/2013 | US20130306373 Electronically activated underreamer and calliper tool |
| 11/21/2013 | DE102012010199A1 Method for forming tubular borehole in ground, involves exhausting rising fluid from borehole through annular space and discharging exhausted rising fluid by ejection head, where annular space is formed between drill pipe and standpipe |
| 11/20/2013 | EP2663734A2 Method and system for radially expanding a tubular element and directional drilling |
| 11/20/2013 | EP2663726A1 Boring ram |
| 11/20/2013 | CN203296702U Self-excited pulse PDC (polycrystalline diamond compact) drill bit |
| 11/20/2013 | CN203296693U Drilling tool capable of generating axial impact vibration |
| 11/20/2013 | CN203296692U Twisting-pressing double-punching tool |
| 11/20/2013 | CN203296691U Automatic air exhausting device of oil well grouting |
| 11/20/2013 | CN203296690U Electronic control integrated system of control handle of horizontal directional drilling machine |
| 11/20/2013 | CN203296689U Control handle integrated system of horizontal directional drilling machine |
| 11/20/2013 | CN203296688U Drilling device capable of increasing drilling pressure locally |
| 11/20/2013 | CN203296687U Integrated arrangement vertical shaft drilling machine |
| 11/20/2013 | CN203296686U Crawler-type full-hydraulic combination rock drilling machine |
| 11/20/2013 | CN203296685U Kilometer drilling machine |
| 11/20/2013 | CN203296677U Single connecting lever overrunning percussion drill |
| 11/20/2013 | CN203294217U Rotary drilling rig travelling device and rotary drilling rig |
| 11/20/2013 | CN103403288A Method, system and rock drilling apparatus for installing a pipe in drilled holes in rock drilling |
| 11/20/2013 | CN103397849A Vertical shaft gear rack drilling machine derrick |
| 11/20/2013 | CN103397845A Method of controlling building settlement caused by penetration of jacked pipe through grout replacement |
| 11/20/2013 | CN103397844A Process for manufacturing well-drilling casing pipe of ice layer |
| 11/20/2013 | CN103397843A Miniature non-excavation horizontal drilling equipment |
| 11/20/2013 | CN103397579A Method for repairing plate type concrete retaining shoulder of ballastless track and drilling device |
| 11/20/2013 | CN102305024B Device for drilling machine for short-distance movement along rail and moving method thereof |
| 11/20/2013 | CN102128047B Gas-slag separation and recovering system for drilling construction |
| 11/20/2013 | CN102080503B Continuous directional coring and deflecting machine tool with dual tubes for outer guiding and inner drilling and deflecting method thereof |
| 11/20/2013 | CN101960086B A method and device for making lateral openings out of a wellbore |
| 11/20/2013 | CN101952539B Systems and methods for improved positioning of pads |
| 11/20/2013 | CN101812968B 步履式水平定向钻机 Walking horizontal directional drilling |
| 11/20/2013 | CN101644135B Rotary drilling rig and drilling device thereof |
| 11/19/2013 | US8589124 Methods for modeling wear of fixed cutter bits and for designing and optimizing fixed cutter bits |
| 11/19/2013 | CA2742623C Pressure and flow control in drilling operations |
| 11/14/2013 | WO2013170075A2 System and method for drilling hammer communication, formation evaluation and drilling optimization |
| 11/14/2013 | WO2013169839A1 Lateral liner tie back system and method |
| 11/14/2013 | WO2013167521A1 Method and system for sealing an annulus enclosing a tubular element |
| 11/14/2013 | WO2013167520A1 Method and system for sealing an annulus enclosing a tubular element |
| 11/14/2013 | WO2013017560A3 Drilling tool for laying a tube in the ground |
| 11/14/2013 | US20130303411 Methods and Materials to Enhance High Temperature Rheology in Invert Emulsions |
| 11/14/2013 | US20130299248 Adjustable Body Supported Cutter Arms for Underreamer |
| 11/14/2013 | US20130299246 Steerable System |
| 11/14/2013 | US20130299245 Downhole tools having activation members for moving movable bodies thereof and methods of using such tools |
| 11/14/2013 | US20130299243 Mud Motor Bearing Assembly and Method |
| 11/14/2013 | US20130299239 Method For Controlling Drilling Unit of Rock Drilling Rig, and Rock Drilling Rig |
| 11/13/2013 | EP2662523A1 Helical drill bit for an auger of a ground excavation assembly, in particular for building excavated piles, and drilling method that uses such a bit |
| 11/13/2013 | EP2661532A1 Well tool with shearable collet |
| 11/13/2013 | CN203285339U While-drilling reaming drilling assembly and drilling machinery |
| 11/13/2013 | CN203285338U Separate-exciting, self-exciting and contracting-diffusing type composite shock pulsed jet device |
| 11/13/2013 | CN203285337U Downhole pulse acceleration device |
| 11/13/2013 | CN203285336U Power drilling tool |