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)
12/2002
12/03/2002US6487920 Situ soil sampling probe system with heated transfer line
12/03/2002CA2197964C Method and apparatus for drilling with a flexible shaft while using hydraulic assistance
11/2002
11/28/2002US20020175004 Horizontal directional drilling in wells
11/28/2002US20020175003 Rotary steerable drilling tool
11/27/2002CN2522601Y Modulated rotary guiding offset tool
11/27/2002CN2522600Y Lift-by-man drilling rig
11/27/2002CN2522597Y Desert auger drilling rig
11/26/2002US6484825 Cutting structure for earth boring drill bits
11/26/2002US6484822 Cutting structure for earth boring drill bits
11/26/2002US6484820 Method and device for driving bore-holes, especially in the sea bed, using a guide tip
11/26/2002US6484819 Directional borehole drilling system and method
11/26/2002US6484818 Horizontal directional drilling machine and method employing configurable tracking system interface
11/26/2002CA2141984C Continuous control system for a mining or tunnelling machine
11/22/2002CA2348708A1 An apparatus for underground directional pressing and pipe installation
11/21/2002WO2002092956A1 Jet cutting device with deflector
11/21/2002WO2002092955A2 Earth boring device
11/21/2002US20020171560 Reservoir management system and method
11/21/2002US20020170751 Adjustable housing for a mud motor
11/21/2002US20020170750 Method and device for rotary well drilling
11/21/2002US20020170713 System for forming a window and drilling a sidetrack wellbore
11/21/2002DE10123058A1 Ground drilling via pilot holes, comprises rotating cylindrical head with endface angled one side for steering, and with fluid jet fed via annulus between inner and outer drill-rod once plugged together as pilot tube
11/21/2002DE10122299A1 Horizontal directional drilling loads for rock and stone drilling, drill-head rotates one way only so one rock face segment is loaded with higher pressure by the leading cutter than remainder of the face, drill has leading and main cutters
11/20/2002EP1258596A1 Method for refurbishing a tunnel drainage system
11/20/2002EP1258593A2 Rotary steerable drilling tool
11/20/2002EP1257723A1 Device for drilling, especially percussion or rotary percussion drilling, holes
11/20/2002CN1380934A Method and device for moving tube in borehole in ground
11/19/2002US6481930 Apparatus and method for inserting and removing a flexible first material into a second material
11/19/2002US6481511 Rotary drill bit
11/19/2002US6481510 Directional drill for railway drilling and method of using same
11/19/2002US6481507 Doweling hole drilling machine
11/19/2002US6481501 Method and apparatus for drilling and completing a well
11/18/2002CA2385793A1 Well reference apparatus and method
11/14/2002WO2002091554A1 Downhole torque generator
11/14/2002WO2002091553A1 Downhole torque-generating and generator combination apparatus
11/14/2002WO2002090707A2 Drilling device comprising a drive body with nozzles
11/14/2002US20020166701 Apparatus and method for directional drilling with coiled tubing
11/14/2002US20020166668 Tubing anchor
11/13/2002EP1256692A1 Drilling method and means for a direct survey of geotechnical parameters
11/13/2002CN2520405Y Device for non-excavation drilling laying of underground pipeline
11/13/2002CN2520404Y Hydraulic drilling guide device
11/12/2002US6478097 Electrically sequenced tractor
11/12/2002US6478085 System for accessing subterranean deposits from the surface
11/07/2002WO2002088510A1 Drilling system with expandable sleeve
11/07/2002WO2002088508A1 Apparatus for use in a wellbore
11/07/2002WO2002087962A1 Disconnectable riser tensioning buoy
11/07/2002WO2002035056A3 Downhole generator for horizontal directional drilling
11/07/2002US20020164212 Deeply buried transmission line
11/07/2002US20020162690 Downhole drilling apparatus
11/07/2002US20020162689 Horizontal directional drilling in wells
11/07/2002US20020162658 Apparatus for use in a well
11/07/2002DE10121564A1 Bohrvorrichtung mit einem Vortriebskörper mit Düsen Drilling device with a propulsion nozzle body with
11/06/2002CN2519852Y Vehicle carried drilling rig
11/05/2002US6474415 Method and apparatus for milling openings in downhole structures
11/04/2002EP1153195A4 Downhole apparatus and method for milling a window and at least one key-way in a well casing
10/2002
10/31/2002WO2002087045A1 No-dig method for establishing and operating an underground telecommunications (fixed) network that follows the route of existing waste-water networks
10/31/2002WO2002086278A1 Method of drilling an ultra-short radius borehole
10/31/2002WO2002085821A2 In situ recovery from a relatively permeable formation containing heavy hydrocarbons
10/31/2002US20020157871 Apparatus and method of oscillating a drill string
10/31/2002US20020157868 Well casing installation and removal apparatus and method
10/31/2002US20020157866 Method and apparatus for drilling an offshore underwater well
10/31/2002DE10116363A1 Bohrkopf einer Bohreinrichtung, insbesondere Spülbohrkopf einer Flachbohreinrichtung Drill a drilling, in particular a power swivel Flachbohreinrichtung
10/30/2002EP1252413A2 System for automatically drilling and backreaming boreholes
10/30/2002CN2519010Y Hydraulic controlled variable gauge stabilizer
10/30/2002CN2519009Y Horizontal drilling pipe-laying drilling device
10/29/2002US6470979 Sonde housing structure
10/29/2002US6470978 Fluid drilling system with drill string and retro jets
10/29/2002US6470977 Steerable underreaming bottom hole assembly and method
10/29/2002US6470976 Excavation system and method employing adjustable down-hole steering and above-ground tracking
10/29/2002US6470974 Three-dimensional steering tool for controlled downhole extended-reach directional drilling
10/29/2002US6470605 Earth reduction tool
10/29/2002CA2241150C Method and apparatus for forming piles in-situ
10/29/2002CA2236563C Jetting tool for well cleaning
10/29/2002CA2076409C Rock drilling device
10/24/2002WO2002084615A1 Lost and found system and method with optional product warranty registration
10/24/2002WO2002084065A2 Drilling head of a drilling device, particularly a wash drilling head of a horizontal drilling device
10/24/2002US20020153723 Bent sub assembly for directional drilling
10/24/2002DE10132972C1 Underground drilling head for making borehole has screw thread with drilling teeth on front end, rotating in casing with steerable front end
10/23/2002EP0817938B1 Corrosion protection for steel pipes
10/22/2002US6467558 Multiple air hammer apparatus and excavating direction correcting method therefor
10/22/2002US6467557 Long reach rotary drilling assembly
10/22/2002CA2067616C Device in hammer machines
10/17/2002WO2002081856A1 Method for drilling and drilling apparatus
10/17/2002WO2002081855A1 Hydraulic in-the-hole percussion rock drill
10/17/2002WO2002046564A3 Boring apparatus
10/17/2002US20020150430 Method and apparatus for forming piles in place
10/17/2002US20020149498 Reservoir monitoring through windowed casing joint
10/17/2002US20020148650 Long gauge roller vane drilling motor
10/17/2002US20020148647 Method and system for accessing subterranean deposits from the surface
10/17/2002US20020148617 Well reference apparatus and method
10/17/2002US20020148613 Method and system for accessing subterranean deposits from the surface
10/17/2002US20020148605 Method and system for accessing subterranean deposits from the surface
10/17/2002DE10120186C1 Underground telecommunications network installation and operating method uses empty pipes for optical fibres or cables laid along existing water supply network
10/16/2002EP1249574A2 Multilateral well drilling and completion method and apparatus
10/16/2002EP1248894A1 Method and apparatus for a combined exit guide and sectional mill for sidetracking
10/16/2002EP1248893A1 Integrated transmitter surveying while boring (swb) entrenching powering device for the continuation of a guided bore hole
10/16/2002CN1092745C Method and equipment for collecting stratigraphic data during well drilling
10/16/2002CN1092744C Equipment for establishing branch wells at node of parent well
10/15/2002US6464023 Hydraulic in-the-hole percussion rock drill
10/15/2002US6464022 Mobile horizontal directional boring apparatus and method for use in boring from existing utility manholes
10/15/2002US6464021 Equi-pressure geosteering
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