| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 02/19/2014 | CN203441367U Safe grouting device for casing string |
| 02/19/2014 | CN203441366U Double-pipe fast connection and dust collection device for air sleeve pipe drilling |
| 02/19/2014 | CN203441365U Water jet cutter |
| 02/19/2014 | CN203441364U Combined rotary-drilling drill for short radius deflection of coal seam penetrating hole of coal seam roof base plate |
| 02/19/2014 | CN203441363U Self-moving device for full-hydraulic drilling machine |
| 02/19/2014 | CN203441362U Gas-water double-way rotating seal |
| 02/19/2014 | CN203441361U Rotary drill with high-strength drill rod |
| 02/19/2014 | CN203441360U Rotary drill with compressed gas injection rate controllable |
| 02/19/2014 | CN203441359U Rotary drill rig used for spray-cooling drill bit |
| 02/19/2014 | CN203441358U While-drilling well wall corrector |
| 02/19/2014 | CN103597165A Variably configurable wellbore junction assembly |
| 02/19/2014 | CN103597164A Wellbore junction completion with fluid loss control |
| 02/19/2014 | CN103597161A Method and arrangement for preparing a charging plan |
| 02/19/2014 | CN103597160A Method and arrangement for designing drilling plan |
| 02/19/2014 | CN103590838A Heading and loading machine for drilling and digging |
| 02/19/2014 | CN103590833A Spiral-unearthing pipe-jacking pipe curtain construction method and device |
| 02/19/2014 | CN103590748A Multifunctional water jet nozzle and using method thereof |
| 02/19/2014 | CN103590747A Rotary drilling rig mast anti-deflection device and rotary drilling rig with same |
| 02/19/2014 | CN102477845B Method for drilling horizontal well with super-short radius |
| 02/18/2014 | CA2718929C Coupling apparatus |
| 02/13/2014 | WO2014026004A2 Systems and method for drilling in rock using microwaves |
| 02/13/2014 | WO2014025893A2 High-speed triple string drilling system |
| 02/13/2014 | WO2014025798A2 System and method for simulation of downhole conditions in a well system |
| 02/13/2014 | WO2014025567A1 A method and apparatus for drilling and completion fluid separation |
| 02/13/2014 | US20140041944 Water-based polymer drilling fluid and method of use |
| 02/13/2014 | US20140041940 System and method for drilling in rock using microwaves |
| 02/13/2014 | US20140041881 Single trip liner setting and drilling assembly |
| 02/13/2014 | CA2821150A1 Method and device for producing and measuring a borehole |
| 02/13/2014 | CA2786017A1 Downhole pulse-generating apparatus |
| 02/12/2014 | EP2694768A2 Apparatus for controlling drill bit depth of cut using thermally expandable materials |
| 02/12/2014 | CN203430426U Mechanical small borehole-reaming tool |
| 02/12/2014 | CN203430425U Water outlet hole-digging tool for water faucet |
| 02/12/2014 | CN203430424U High-rotation-speed full-hydraulic crawler-belt type drilling machine for coal mine |
| 02/12/2014 | CN203430423U Environment-friendly drag type horizontal directional drilling machine |
| 02/12/2014 | CN203430422U Lifting rotating platform caterpillar band drilling machine for coal mines |
| 02/12/2014 | CN203430421U Device capable of preventing mast from colliding with cab of miniature rotary drilling rig |
| 02/12/2014 | CN203430418U Falling prevention follow-up frame sliding lug for rotary drilling rig |
| 02/12/2014 | CN103573220A Novel gas-lift liquid discharge process of gas well drilling |
| 02/12/2014 | CN103573195A Hydraulic bearing-type riser universal joint device |
| 02/12/2014 | CN103573193A Integrated drilling and splitting drill stem device |
| 02/12/2014 | CN103573184A Solid foam well drilling method |
| 02/12/2014 | CN102330538B Bottom hole assembly for prebuckling dynamical pendulum of single stabilitzer |
| 02/12/2014 | CN102220839B Construction machine having computer unit for determining adjusting range |
| 02/11/2014 | CA2727885C Enhanced passive ranging methodology for well twinning |
| 02/11/2014 | CA2715688C Passive vertical drilling motor stabilization |
| 02/11/2014 | CA2708096C Method and system for delineating a second wellbore from a first wellbore |
| 02/11/2014 | CA2688186C Mill-through tailpipe liner exit and method of use thereof |
| 02/11/2014 | CA2686627C Electrically sequenced tractor |
| 02/06/2014 | WO2014022831A1 Downhole gas generator with multiple combustion chambers and method of operation |
| 02/06/2014 | WO2014022338A1 Drill bit with a force application device using a lever device for controlling extension of a pad from a drill bit surface |
| 02/06/2014 | WO2014022336A1 Drill bit with hydraulically-activated force application device for controlling depth-of-cut of the drill bit |
| 02/06/2014 | WO2014022335A1 Drill bit with a force application using a motor and screw mechanism for controlling extension of a pad in the drill bit |
| 02/06/2014 | US20140034392 Hydrocarbon Well Completion System and Method of Completing a Hydrocarbon Well |
| 02/06/2014 | US20140034390 System and method for simulation of downhole conditions in a well system |
| 02/06/2014 | US20140034387 Rotation unit, rock drilling unit and method for rock drilling |
| 02/06/2014 | US20140034385 Drilling bucket and method for drilling a bore hole |
| 02/06/2014 | US20140034311 Methods and apparatus for wellbore construction and completion |
| 02/06/2014 | DE102009012613B4 Verfahren und Vorrichtung zum Einbringen eines Rohrs in eine Bohrung im Erdreich Method and apparatus for inserting a tube into a bore in the ground |
| 02/05/2014 | EP2691595A2 Single trip liner setting and drilling assembly |
| 02/05/2014 | EP2691593A2 Cutting element having modified surface |
| 02/05/2014 | CN203420635U Minor-radius radial-direction well drilling positioning device |
| 02/05/2014 | CN203420634U Drilling tool capable of reducing combining exterior angle difference measurement error of directional drilling tool |
| 02/05/2014 | CN203420633U Down-the-hole drill space multi-direction drilling mechanism |
| 02/05/2014 | CN103562484A Offshore top tensioned riser buoyancy can system and methods of field development |
| 02/05/2014 | CN103556982A Suspension arm vertical drilling control system |
| 02/05/2014 | CN103556958A Clamping structure for core drilling machine |
| 02/05/2014 | CN103556947A Coal mine underground self-suction abrasive jet flow drill bit and drilling method |
| 02/05/2014 | CN103556946A 钻井方法 Drilling method |
| 02/05/2014 | CN103556945A High build-up rate well track control method |
| 02/05/2014 | CN103556944A Double-layer internal deslagging and anti-blocking drilling tool for soft and outburst coal seam drilling, and use method of drilling tool |
| 02/05/2014 | CN103556943A Method for controlling impact power of rock drilling system according to propelling force and device |
| 02/05/2014 | CN103556942A Petroleum drilling device with multifunctional adjusting structure |
| 02/05/2014 | CN103556625A Complex squeezed pile forming construction method and complex squeezed pile forming device |
| 02/05/2014 | CN103551231A Pulse breaking mechanism, as well as seabed cobalt-rich crust breaking system and method |
| 02/05/2014 | CN102418478B Operation method of hollow guider by using multilateral well windowing sidetrack drilling |
| 02/04/2014 | US8641113 Gripping device for tubular objects |
| 02/04/2014 | US8640793 Dynamic steering tool |
| 02/04/2014 | US8640792 Flexible directional drilling apparatus and related methods |
| 02/04/2014 | US8640790 Apparatus, system and method for motion compensation using wired drill pipe |
| 02/04/2014 | US8640781 Method and device for deploying a cable and an apparatus in the ground |
| 02/04/2014 | US8640778 Systems and methods for subsea drilling |
| 02/04/2014 | CA2688733C Transportable well service platform |
| 01/30/2014 | WO2014018085A1 Systems and methods for sonic subsurface material removal |
| 01/30/2014 | US20140027185 High Load Universal Joint for Downhole Rotary Steerable Drilling Tool |
| 01/30/2014 | US20140027184 Dual-Member Pipe Joint For A Dual-Member Drill String |
| 01/30/2014 | US20140027183 Method and system for installation of in-ground conduit |
| 01/30/2014 | US20140027181 Methods and systems for drilling boreholes |
| 01/30/2014 | US20140027180 Drill Bit with Hydraulically-Activated Force Application Device for Controlling Depth-of-Cut of the Drill Bit |
| 01/30/2014 | US20140027179 Drill Bit with Electrohydraulically Adjustable Pads for Controlling Depth of Cut |
| 01/30/2014 | US20140027178 System and method for drilling a borehole |
| 01/30/2014 | US20140027177 Drill Bit with a Force Application Device Using a Lever Device for Controlling Extension of a Pad From a Drill Bit Surface |
| 01/30/2014 | US20140027176 Drill Bit with a Force Application Using a Motor and Screw Mechanism for Controlling Extension of a Pad in the Drill Bit |
| 01/30/2014 | DE102012106730A1 Device for exerting pushing- or traction force on pipe lines to be laid in ground for overcoming watercourses or other obstacles, has pivot arm placed between pedestal and main cylinder and is connected with pedestal by pin |
| 01/29/2014 | EP2689092A1 Directional drilling tool |
| 01/29/2014 | CN203412588U Drilling and excavating backhoe loader |
| 01/29/2014 | CN203412571U Pressure testing device of thrust module of vertical drilling tool |
| 01/29/2014 | CN203412527U Self-propelled small-tonnage guy-rope-free hydraulic disc-brake workover rig |
| 01/29/2014 | CN203412515U Articulated protective plate for automatic vertical drilling |
| 01/29/2014 | CN203412514U Angle holding machine for window sidetrack drilling in sleeve with phi 139.7mm |
| 01/29/2014 | CN203412513U Ridge-type rolling ball drilling guiding device |