Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 7 - Special methods or apparatus for drilling
Patents for E21B 7 - Special methods or apparatus for drilling (22,064)
10/2012
10/11/2012US20120255780 Method and apparatus for calculating and correcting for directional drilling tool face offsets
10/11/2012US20120255775 Methods and systems for drilling boreholes
10/11/2012US20120255774 High power laser-mechanical drilling bit and methods of use
10/11/2012US20120255736 Offshore top tensioned riser buoyancy can system and methods of field development
10/11/2012CA2832296A1 System and method for coupling a drill bit to a whipstock
10/11/2012CA2832056A1 Apparatus for controlling drill bit depth of cut using thermally expandable materials
10/10/2012EP2507879A1 Device for removing or replacing cables
10/10/2012CN202483443U Central cutter hydraulic signal-emitting device used for walking counter-boring cutter head
10/10/2012CN202483442U Submersible well drill
10/10/2012CN202483441U Orientation device for lateral drilling
10/10/2012CN202483440U Tractor type mobile drill rig
10/10/2012CN202483439U Counter-weight self-assembly and self-disassembly device for rotary drilling rig
10/10/2012CN202483438U Anchor rod drill rig
10/10/2012CN202483437U Trestle type pneumatic drilling machine
10/10/2012CN202483436U Non-cavern butting and communicating exploitation system
10/10/2012CN102720526A Double-plug piping method of heavy-caliber gas exhaust hole working sleeve
10/10/2012CN102720435A Drilling platform
10/10/2012CN102720432A Self-propelled underground boring jumbo
10/10/2012CN102720431A Omnibearing deep-hole drill carriage for coal mines
10/10/2012CN102720429A Hydraulic-driven drilling device
10/10/2012CN102720428A Rotary drilling rig and method for loading same
10/10/2012CN102031931B Self-rotating jet drilling device
10/10/2012CN101705786B Pot hole drilling machine carried on vehicle
10/10/2012CN101063399B Drilling implement for erecting a drilling pillar in the ground and method thereof
10/09/2012US8281879 Method of drilling a wellbore
10/09/2012US8281878 Method of drilling and running casing in large diameter wellbore
10/09/2012US8281877 Method and apparatus for drilling with casing
10/09/2012US8281876 Reamers and methods for directional drilling
10/09/2012US8281868 Torque transmitting load shoulder
10/09/2012US8281863 Detachable electrical actuator
10/09/2012US8281862 Testing subsea umbilicals
10/09/2012CA2571358C Entrainment fluid channeling device for a down-hole drill string
10/07/2012CA2736837A1 Method and apparatus for calculating and correcting for directional drilling tool face offsets
10/04/2012WO2012135555A2 System and method for reducing pressure fluctuations in an oilfield pumping system
10/04/2012WO2012135257A2 Cutting element having modified surface
10/04/2012WO2012134461A1 Apparatus and method for rotary steering
10/04/2012WO2012074404A3 Method and device for drilling a pit or passage, and flexible tube therefor
10/04/2012US20120247837 Horizontal drilling system
10/04/2012US20120247836 Mining machine with booms providing enhanced rib access
10/04/2012US20120247835 Method for the drilling, in particular percussion or rotary percussion drilling, of holes in soil or rock material and device therefor
10/04/2012US20120247834 Cutting element having modified surface
10/04/2012US20120247833 Downhole drilling utilizing measurements from multiple sensors
10/04/2012US20120247830 Mobile drilling system and a methodology for installation of the system
10/04/2012US20120247763 Biomass-based oil field chemicals
10/04/2012CA2830675A1 Cutting element having modified surface
10/03/2012EP2505762A2 Drilling device and method for horizontal drilling
10/03/2012EP2505543A1 Construction device
10/03/2012EP2504516A1 Tool positioning and latching system
10/03/2012CN202468927U Reduction box for power head and vehicular coalbed gas drill rig with reduction box
10/03/2012CN202467695U Floating device and vehicle-mounted CBM (Coal Bed Methane) drilling machine using floating device
10/03/2012CN202467678U Assorted unit integration dragging device of drilling and repairing machine
10/03/2012CN202467657U Well drilling hydraulic pressure reaming device
10/03/2012CN202467656U Rock-entering excitation device for rotary drilling rig
10/03/2012CN202467655U Telescopic-sleeve-installed roadheader
10/03/2012CN202467654U Micro drilling machine with horizontal orientation
10/03/2012CN202467653U Control platform for down-the-hole (DTH) drill
10/03/2012CN202467652U High speed rotary drilling machine
10/03/2012CN202467651U High-speed rotating drilling machine
10/03/2012CN202467650U Vehicle-mounted coal-bed methane drilling machine
10/03/2012CN202467649U Telescopic support leg and vehicle-mounted coal seam pneumatic drilling machine using telescopic support legs
10/03/2012CN202467648U Warped power head and vehicle-mounted coal bed gas drilling machine using same
10/03/2012CN202467647U Deep hole drill carriage capable of rotating at angle of 90 DEG for coal mine
10/03/2012CN202467646U Spiral piling machine
10/03/2012CN202467645U Blowout preventer test platform
10/03/2012CN202467644U Underground drill rig
10/03/2012CN202467642U Double-control platform down-the-hole drill
10/03/2012CN102713138A Downhole guiding tool
10/03/2012CN102713128A Rotary Steerable Tool Employing A Timed Connection
10/03/2012CN102712265A Mining vehicle and method for its energy supply
10/03/2012CN102712260A Mining vehicle and method for its energy supply
10/03/2012CN102705140A Drilling power tool, drilling tool and drilling method for forming boreholes
10/03/2012CN102705001A Isolated-section two-hole split-layer grouting filling well location method for mining overburden rock
10/03/2012CN102704861A Novel movable positioning device for drilling machine
10/03/2012CN102704842A Hydro-oscillator for well drilling
10/03/2012CN102704841A Guide drilling tool for developing shale gas
10/03/2012CN102704840A Self-pushed type radial horizontal well steering device
10/03/2012CN102704839A Hanging carrying type integral hydraulic rock drilling machine
10/03/2012CN102704838A Power type multifunctional drilling machine based on excavating machine
10/03/2012CN102704837A Shallow hole drilling machine
10/03/2012CN102704836A Vehicle-mounted all-hydraulic core drilling machine structure
10/03/2012CN102704835A Detachable all-hydraulic core drilling machine structure
10/03/2012CN102704834A Frequency oscillation pile casing type drilling machine
10/03/2012CN101545358B Erosion reducing system for gas drilling
10/03/2012CN101517188B Systems and methods for drilling and producing subsea fields
10/03/2012CN101358508B Method for producing roller of multi-functional stabilizer and roller of multi-functional stabilizer
10/03/2012CN101268247B A percussion hammer for enlarging drilled holes
10/03/2012CN101059061B Sliding push-the-bit type steering drilling tool
10/02/2012US8276689 Methods and apparatus for drilling with casing
10/02/2012US8276687 Steering head
09/2012
09/27/2012WO2012128759A1 Well tool assemblies with quick connectors and shock mitigating capabilities
09/27/2012WO2012126947A1 Directional drilling tool
09/27/2012US20120243945 Method, apparatus and system for attaching an anchor member to a floor of a body of water
09/27/2012US20120241221 Microtunnelling system and apparatus
09/27/2012US20120241220 Dendritic Surfactants and Extended Surfactants for Drilling Fluid Formulations
09/27/2012US20120241219 Resonance enhanced rotary drilling
09/27/2012US20120241171 Multiple Liner Hanger Assembly
09/27/2012DE102010004609A9 Meisselloses Bohrsystem Meisselloses drilling system
09/26/2012EP2503092A1 Locking device for tubular elements
09/26/2012CN202451664U Rotary braking device of rotary drilling rig and rotary drilling rig
09/26/2012CN202451075U Self-lubrication structure of roller-type stabilizer and reamer roller component
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