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)
12/2010
12/08/2010CN201666122U Ship type base connecting device
12/08/2010CN201666118U Mast lifter of rotary drilling rig
12/08/2010CN201666117U Novel screw drill tool comprising wired assembly for testing while drilling
12/08/2010CN201666116U Transmission shaft bracket of turntable transmission box
12/08/2010CN1930920B Extracting and processing hydrocarbon-bearing formations
12/08/2010CN101910554A Method of drilling a wellbore
12/08/2010CN101910547A Degradable whipstock apparatus and methods of use
12/08/2010CN101910546A Method and equipment for small-charge blasting
12/08/2010CN101910545A Method and apparatus for small-charge blasting
12/08/2010CN101910544A Vibratory unit for drilling systems
12/08/2010CN101909826A Drill stand
12/08/2010CN101906988A Remote-control underground gas extraction drilling machine
12/08/2010CN101906936A Hydraulic rock drilling machine of excavator
12/08/2010CN101575851B Two-way cement mixing pile machine
12/07/2010US7845431 Retrieval tool with slips for retrieving bottom hole assembly during casing while drilling operations
12/07/2010CA2537171C Method of locking tubular components in end to end relation
12/07/2010CA2534600C Method for locating casing joints using measurement while drilling tool
12/02/2010WO2010138877A1 Whipstock attachment to a fixed cutter drilling or milling bit
12/02/2010US20100300761 Apparatus and methods to optimize fluid flow and performance of downhole drilling equipment
12/02/2010US20100300760 Enhanced smear effect fracture plugging process for drilling systems
12/02/2010US20100300758 Methods and systems for designing and/or selecting drilling equipment using predictions of rotary drill bit walk
12/02/2010US20100300757 Rotary digging and compression enlarging driller and boring method
12/02/2010US20100300756 Downhole Magnetic Measurement While Rotating and Methods of Use
12/02/2010US20100300751 Motor cooling radiators for use in downhole environments
12/02/2010US20100300698 Wired slip joint
12/02/2010US20100300697 Installing an expandable tubular in a subsea wellbore
12/02/2010DE102009023142A1 Method for inserting geothermal energy probe into the soil, involves constructing bore hole in soil by boring fixture and simultaneously or subsequently inserting geothermal energy probe into bore hole
12/02/2010DE102009012613A1 Verfahren und System zum Einbringen eines Rohrs in eine Bohrung im Erdreich A method and system for introducing a tube into a bore in the ground
12/02/2010CA2753856A1 Whipstock attachment to a fixed cutter drilling or milling bit
12/01/2010EP2255060A2 Devices and methods for horizontal directional drilling with a boring tool library
12/01/2010EP2126271B1 Improved shoe for wellbore lining tubing
12/01/2010CN201661271U Exhaust device of air drilling tool
12/01/2010CN201661245U Windowing chip-proof joint for branch well
12/01/2010CN201661244U Full hydraulic pressure multi-functional well head device
12/01/2010CN201661238U Reducer expansion pipe seat seal system
12/01/2010CN201661237U Multifunctional power head of all-hydraulic drill
12/01/2010CN101899950A Method for hydraulically drilling high-stress coal
12/01/2010CN101899949A Multifunctional scour-preventing jet flow drilling and joint-cutting spray head for coal bed
12/01/2010CN101899948A Method for cutting slots in concrete buildings
12/01/2010CN101899947A Drilling method
11/2010
11/30/2010US7841425 Drilling subsurface wellbores with cutting structures
11/30/2010US7841413 Pre-made up side entry sub apparatus and method
11/25/2010WO2010135376A1 Methods and apparatuses for installing lateral wells
11/25/2010WO2010108666A3 Method for localizing a boring device of an earth boring apparatus
11/25/2010WO2010099949A3 Electrically insulated earth boring device
11/25/2010WO2010096629A4 Stabilizer assemblies with bearing pad locking structures and tools incorporating same
11/25/2010US20100294570 Boom arrangement for a rock drill and rock drill rig
11/25/2010US20100294569 Methods for cuttings for a wireline drilling tool
11/25/2010US20100294568 Drawworks device on a drill floor
11/25/2010US20100294567 Impactor Excavation System Having A Drill Bit Discharging In A Cross-Over Pattern
11/25/2010US20100294501 Process for the preparation of an organic composition comprising an n-nonyl ester
11/25/2010US20100294498 Viscoelastic surfactant based wellbore fluids and methods of use
11/25/2010US20100294487 System for drilling a wellbore
11/24/2010EP2253795A2 Drive unit
11/24/2010EP2252764A2 One trip liner running, cementing and setting tool using expansion
11/24/2010EP2252761A1 Boom arrangement for a rock drill and rock drill rig
11/24/2010EP1786716B1 Winch assembly
11/24/2010CN201650193U Blowout prevention connection unit of long-distance horizontal borehole
11/24/2010CN201650168U Gas trap of pneumatic drill
11/24/2010CN201650156U Full-power power take-off hydraulic mechanical workover rig
11/24/2010CN201650116U Multifunctional coal seam scouring-prevention jet flow drill lancing spray nozzle
11/24/2010CN201650115U Centering ribbed bent shell
11/24/2010CN201650114U Wheel rotary drilling machine
11/24/2010CN201650113U Pneumatic anchor drill
11/24/2010CN201650112U Ground anchor car
11/24/2010CN201650111U Direct-connection type transfer case
11/24/2010CN201650110U Novel outburst prevention drilling and loading machine
11/24/2010CN201650108U Shearing-type down-the-hole drill
11/24/2010CN201650107U Light outdoor downhole drill
11/24/2010CN201649084U Basket reamer of bridge cast-in-situ bored pile
11/24/2010CN1871408B Nozzle unit and method for excavating a hole in an object
11/24/2010CN101896686A Rock drilling rig and method for drilling
11/24/2010CN101896683A System for drilling a wellbore
11/24/2010CN101896682A Device and method to reduce breakdown/fracture initiation pressure
11/24/2010CN101892806A Method and device for rock-breaking and well-drilling by high temperature and high pressure air jet
11/24/2010CN101892805A Seal structure for upward return mud in power head of shaft boring machine
11/24/2010CN101109269B Deepwater drilling device based on near surface deviation
11/23/2010CA2444811C Downhole torque-generating and generator combination apparatus
11/18/2010WO2010132433A2 Drilling rig ice protector apparatus and methods
11/18/2010WO2010103271A3 A borehole cutting assembly for directional cutting
11/18/2010WO2008157185A3 Mechanical and fluid jet drilling method and apparatus
11/18/2010US20100288557 Expandable reamer for subterranean boreholes and methods of use
11/18/2010US20100288555 Procedure and device for the optimal, utilization of carbon resources such as oil fields, oil shales, oil sands, coal, and co2
11/18/2010DE102009054183A1 Zug- und Druckvorrichtung Traction and compression device
11/17/2010CN201635715U Electric control device of core drilling machine
11/17/2010CN201635683U Gas drilling dust falling device
11/17/2010CN201635674U Roller stabilizer for gas drilling
11/17/2010CN201635659U Gas drilling erosion experimental device
11/17/2010CN201635658U Hydraulic diameter-variable stabilizer
11/17/2010CN201635657U Downhole drilling tool for intelligent downhole multi-branch horizontal drilling completion system
11/17/2010CN201635656U Side-propping anchor rod-anchor cable construction drill carriage with three movable arms
11/17/2010CN201635655U Side-propping anchor rod-anchor cable construction drill carriage with two movable arms
11/17/2010CN201635654U Multifunctional electric well dredger
11/17/2010CN201635653U Hydraulic drill rig device on construction drill carriage
11/17/2010CN201635652U Double-guide rail drill carriage for coalmine
11/17/2010CN201635651U Mobile device of drilling and repairing well machine
11/17/2010CN201635650U Multi-angle coal rock drilling machine
11/17/2010CN201635649U Driving face direction-changing boring device for mine
11/17/2010CN101886541A Opposed steering large-power signal source system for long-distance large-caliber oil-gas pipeline
11/17/2010CN101886521A Pneumatic reverse circulating drilling tool for fixing holes
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