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)
06/2005
06/29/2005EP1545839A1 Sonic drill
06/29/2005CN1632279A Double action air leakage prevention agent for oil-gas well cementing, method for preparation and use thereof
06/29/2005CN1632232A Bi-directional cement soil mixing pile machine
06/28/2005US6910542 Acoustic flow pulsing apparatus and method for drill string
06/28/2005US6910538 Whipstock collet latch
06/28/2005CA2441667C Method and system for accessing subterranean deposits from the surface
06/23/2005WO2005056971A1 Method and apparatus for directional drilling
06/23/2005WO2004094767B1 Expanded liner system and method
06/23/2005US20050133274 Drilling with concentric strings of casing
06/23/2005US20050133269 Adjustabel hole cleaning device
06/23/2005US20050133268 Method and apparatus for casing and directional drilling using bi-centered bit
06/23/2005US20050133266 Rotating drilling head drive
06/23/2005US20050133263 Boring tool tracking fundamentally based on drill string length, pitch and roll
06/23/2005US20050133258 [nanotube electron emission thermal energy transfer devices]
06/23/2005US20050132794 System, method and apparatus for petrophysical and geophysical measurements at the drilling bit
06/23/2005DE202005004969U1 Drilling or boring device for a slope or incline, e.g. for use in civil engineering, has a suspended guide with two parallel rails along which a drilling unit is moved to permit boring at the required position and angle
06/23/2005DE10353442A1 Buried pipeline cleaning or boring-out system for restoration of old pipeline without cutting trench has chain drive for boring body with chain tensioning pulley in shaft
06/23/2005CA2451926A1 Salt free invert drilling mud
06/22/2005CN2705662Y Power distribution gearbox with angle drive output
06/22/2005CN2705581Y Underwell probing rod hole finder
06/21/2005US6907927 Method and apparatus to vibrate a downhole component
06/16/2005WO2005054628A1 Boring machine having differential global positioning system receiver for underwater rock and boring method thereof
06/16/2005WO2005054620A1 Method, drilling machine, drill bit and bottom hole assembly for drilling by electrical discharge pulses
06/16/2005US20050129950 Polycrystalline Diamond Partially Depleted of Catalyzing Material
06/16/2005US20050127673 Tubing seal
06/16/2005US20050126828 Self-blocking fishing device
06/16/2005US20050126826 Directional casing and liner drilling with mud motor
06/16/2005US20050126825 Directional casing drilling
06/16/2005US20050126821 All terrain vehicle powered mobile drill
06/16/2005US20050126800 Integrated mast and top drive for drilling rig
06/15/2005EP1541801A2 Method and apparatus to vibrate a downhole component
06/15/2005EP1540219A2 Method and apparatus for replacement of underground pipe
06/15/2005CN2704675Y Walking chassis of spiral drill
06/15/2005CN2704674Y Three shaft well ventilating apparatus with frame
06/15/2005CN1628207A Well system
06/14/2005CA2285759C Adjustable gauge downhole drilling assembly
06/14/2005CA2216543C Milling tool, whipstock, milling system and method of forming a window in the wall of a tubular
06/12/2005CA2472857A1 Self-blocking fishing device
06/09/2005WO2005052305A1 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
06/09/2005WO2005052304A1 Method for drilling and lining a wellbore
06/09/2005US20050121234 Drilling machine having rotary tools
06/09/2005US20050121232 Downhole filter
06/09/2005US20050121231 Energy accelerator
06/09/2005US20050121230 Boring machine having differential global positioning system receiver for underwater rock and boring method thereof
06/09/2005US20050120813 Apparatuses for interaction with a subterranean formation, and methods of use thereof
06/08/2005EP1537291A1 Drilling method
06/08/2005EP1537289A2 New and improved method and apparatus involving an integrated or otherwise combined exit guide and section mill for sidetracking or directional drilling from existing wellbores
06/08/2005EP0857247B1 Assembly and process for drilling and completing multiple wells
06/08/2005CN2703871Y Crawler-type anchoring bolt drill carriage
06/08/2005CN2703863Y Dual-function shock-damping propellor
06/08/2005CN2703859Y Well controllable guiding tool
06/08/2005CN1624290A Boring machine having differential global positioning system receiver for underwater rock and boring method thereof
06/07/2005US6902000 Apparatus and methods for expanding tubulars in a wellbore
06/07/2005CA2316044C Reservoir monitoring through modified casing joint
06/02/2005WO2005050777A2 Receiver electronics proximate antenna
06/02/2005WO2005050714A2 High temperature electronic devices
06/02/2005WO2005050257A2 High temperature imaging device
06/02/2005WO2005050080A1 Advancing pipe for placing in the ground
06/02/2005WO2005049957A2 High temperature environment tool system and method
06/02/2005WO2005049955A2 Low friction face sealed reaction turbine rotors
06/02/2005US20050115744 High Volume Density Polycrystalline Diamond With Working Surfaces Depleted Of Catalyzing Material
06/02/2005US20050115741 Well system
06/02/2005US20050115709 Method and system for controlling pressure in a dual well system
06/02/2005CA2544596A1 Low friction face sealed reaction turbine rotors
06/01/2005EP1534925A1 Combined casing expansion / casing while drilling method and apparatus
06/01/2005EP1534653A2 Handheld tool for breaking up rock
06/01/2005CN2703118Y Direction deflecting device fishing indicator
06/01/2005CN2703115Y Suspension positioning recoverable whipstocks
06/01/2005CN1623027A 流体钻削头 Drilling fluid head
05/2005
05/31/2005US6899186 Apparatus and method of drilling with casing
05/31/2005US6899173 Small tubular window system
05/31/2005CA2188291C Casing tube with casing shoe
05/26/2005WO2005047645A1 Method of reducing sand production from a wellbore
05/26/2005WO2005047644A1 Directional cased hole side track method applying rotary closed loop system and casing mill
05/26/2005WO2003076760A8 Steerable soil penetration system
05/26/2005US20050111919 Method and apparatus for underground pipeline installation
05/26/2005US20050109542 Steerable drilling system
05/26/2005US20050109541 Low friction face sealed reaction turbine rotors
05/26/2005US20050109539 Apparatus and methods for thrust sensing valves
05/26/2005US20050109537 Drilling rig
05/26/2005US20050108848 Vacuum hose wobbler
05/25/2005EP1533467A2 Multilateral well drilling and completion method and apparatus
05/25/2005EP1533425A1 Drilling machine with rotating tools
05/25/2005EP1532344A2 Tool apparatus, system and method of use
05/25/2005EP1086291A4 Directional drilling system and apparatus
05/25/2005DE10252692A1 Micro-tunnelling system for e.g. pubic utilities has cutting wheel surrounded by funnel-shaped shroud with variable-geometry cuttings outlet
05/25/2005CN2702043Y Hole opening device for branch well casing
05/25/2005CN2702042Y Device for preventing screw drill from falling into well
05/25/2005CN2702041Y Reentering device for oil and gas branch well
05/24/2005US6896075 Apparatus and methods for drilling with casing
05/24/2005US6896072 Multi-functional drilling vehicle
05/24/2005CA2361874C Method and apparatus for milling openings in downhole structures
05/24/2005CA2310893C Pressure control of a drilling apparatus
05/24/2005CA2262106C Apparatus and method for milling a hole in casing
05/24/2005CA2217899C Dual-member pipe joint for a dual member drill string
05/24/2005CA2153693C Method for determining borehole direction
05/19/2005WO2004097158A8 Fast moving drilling rig
05/19/2005US20050104176 High temperature electronic devices
05/19/2005US20050103530 Bits for use in drilling with casing and method of making the same
05/19/2005US20050103529 Quick-detach vehicle-mounted auger driver
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