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 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780)
03/2003
03/27/2003WO2003025334A1 System for controlling the discharge of drilling fluid
03/27/2003US20030056987 Mixing the substrate with a concentrated mineral acid under high shear conditions; mixing product with alkaline earth compounds, such as lime, under high shear conditions to vaporize the oil and recovering an oil-free product
03/27/2003US20030056811 Coiled tubing wellbore cleanout
03/27/2003CA2460161A1 System for controlling the discharge of drilling fluid
03/26/2003EP1294495A1 Apparatus and methods for making a screen and a screen made by the method
03/25/2003US6538958 Method and apparatus for acoustics logging of fluid density and wet cement plugs in boreholes
03/25/2003US6536540 Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications
03/25/2003US6536529 Communicating commands to a well tool
03/25/2003US6536520 Top drive casing system
03/20/2003WO2003023182A1 Assembly for drilling low pressure formation
03/20/2003WO2003023181A1 Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells
03/20/2003US20030051883 Washpipe assembly
03/20/2003DE20215147U1 Pilot hole cutter for small bore tunnel has hydraulic jet cutting head
03/20/2003CA2803812A1 Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells
03/20/2003CA2803771A1 Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells
03/20/2003CA2461639A1 Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells
03/19/2003EP1292757A1 System for creating a conduit in a borehole formed in an earth formation
03/19/2003CN1403680A Drilling fluid density determining method and controlling plant
03/18/2003US6533946 Apparatus and method for recycling drilling slurry
03/18/2003US6533040 Multi-function apparatus for adding a branch well sealed liner and connector to an existing cased well at low cost
03/13/2003WO2003021074A1 Apparatus and method for transporting waste materials
03/13/2003US20030047622 Cavitating jet
03/13/2003US20030047493 Shale shaker
03/13/2003US20030047315 Float collar
03/13/2003US20030047314 Float collar
03/12/2003EP1290603A1 Method and system for trade of goods, in particular electricity, water, fuel gas and the like
03/11/2003US6530483 Unibody structure for screen assembly
03/11/2003US6530438 Apparatus and process for removing drilling fluid from drill cuttings
03/11/2003US6530437 Multi-gradient drilling method and system
03/11/2003US6530428 Method and apparatus for in-situ production well testing
03/06/2003WO2003018954A1 System and method for processing cuttings polluted with oil-based mud
03/06/2003WO2003018951A2 Washpipe assembly
03/06/2003WO2002101191A3 Packing assembly for rotary drilling swivels
03/06/2003US20030042048 Down hole drilling assembly with independent jet pump
03/05/2003EP1288434A1 Downhole drilling assembly with independent jet pump
03/05/2003EP1287229A1 Real-time method for maintaining formation stability
03/05/2003CA2356570A1 Air operated earth drilling tool
03/04/2003US6527062 Well drilling method and system
03/04/2003US6527054 Apparatus and method for the disposition of drilling solids during drilling of subsea oilfield wellbores
03/04/2003US6527052 Methods of downhole testing subterranean formations and associated apparatus therefor
03/04/2003US6527050 Method and apparatus for formation damage removal
02/2003
02/27/2003WO2003016671A2 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles
02/27/2003WO2003016670A2 Swing mounted fill up and circulating tool
02/27/2003WO2003006778A8 Drilling system and method for controlling equivalent circulating density during drilling of wellbores
02/27/2003US20030040546 Viscoelastic surfactant fluids and related methods of use
02/27/2003US20030038061 Screen with unibody structure
02/27/2003US20030037926 Method and apparatus for formation damage removal
02/27/2003US20030037922 System and method for processing oil-based mud cuttings
02/27/2003US20030037640 Polycrystalline diamond partially depleted of catalyzing material
02/27/2003CA2454865A1 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles
02/26/2003EP0986690B1 Valve for use in a wellbore
02/26/2003CN2537807Y High efficiency energy saving mortar mixer
02/20/2003WO2002068787A3 Method and apparatus for controlling bottom-hole pressure during dual-gradient drilling
02/20/2003US20030035958 Polycrystalline diamond partially depleted of catalyzing material
02/20/2003US20030035957 Polycrystalline diamond partially depleted of catalyzing material
02/20/2003US20030034182 Polycrystalline diamond partially depleted of catalyzing material
02/20/2003US20030034177 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles
02/20/2003US20030034157 Swing mounted fill up and circulating tool
02/20/2003US20030034156 Multi-function apparatus for adding a branch well sealed liner and connector to an existing cased well at low cost
02/18/2003US6520271 Fluid powered rotary drilling assembly
02/18/2003US6520257 Method and apparatus for surge reduction
02/18/2003US6520256 Method and apparatus for cementing an air drilled well
02/13/2003WO2003012243A1 System for controlling the operating pressures within a subterranean borehole
02/13/2003WO2002048063A3 Process for the separation of hollow glass microspheres from muds containing them
02/13/2003WO2002044508A3 Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium
02/13/2003US20030029308 Speed governor
02/12/2003EP1282758A1 Bypass valve
02/12/2003EP1282757A1 Subsea riser disconnect and method
02/12/2003EP1159509A4 Single valve for a casing filling and circulating apparatus
02/12/2003EP1070194B1 A mill and a method for milling
02/11/2003US6517733 Continuous flow liquids/solids slurry cleaning, recycling and mixing system
02/06/2003WO2003010410A1 Injecting a fluid into a borehole ahead of the bit
02/06/2003US20030024740 Method and arrangement for reducing dust-related problems in rock drilling
02/06/2003US20030024737 System for controlling the operating pressures within a subterranean borehole
02/06/2003US20030024706 Downhole surge reduction method and apparatus
02/04/2003USRE37975 Directional boring head with blade assembly
02/04/2003US6513598 Drillable floating equipment and method of eliminating bit trips by using drillable materials for the construction of shoe tracks
01/2003
01/30/2003WO2003008759A1 Buffered well fluids
01/30/2003US20030021995 Applying an aqueous slurry comprising lithium silicate, sodium silicate, potassium silicate, zirconia powder, a fibrous agent, and a magnetic powder to a surface, drying, heat curing
01/29/2003EP1092080B1 Method and tool for fracturing an underground formation
01/29/2003CN2533252Y Sand removal discharging device for sand washing operation of oil and water wells
01/29/2003CN1393633A Automatic sludge discharger for drilling well of petroleum or natural gas
01/28/2003US6510907 Abrasive jet drilling assembly
01/28/2003CA2253350C Continuous belt drilling mud separation system
01/23/2003WO2003006778A1 Drilling system and method for controlling equivalent circulating density during drilling of wellbores
01/21/2003US6508317 Downhole apparatus and method of use
01/21/2003US6508312 Flow control apparatus and method
01/21/2003US6508309 Valve assembly
01/16/2003WO2003004829A1 Internal blow-out preventer change-out tool
01/16/2003WO2003004828A1 Multi-cycle downhole apparatus
01/16/2003WO2003004827A1 Method and apparatus with slips assembly for coupling tubulars without interruption of circulation
01/16/2003WO2002088506A3 Apparatus and method for treatment of waste products
01/16/2003US20030010532 Drill bit having adjustable total flow area
01/16/2003CA2353160A1 Robotic proboscis pipeline apparatus
01/15/2003EP1275815A1 Drill Bit Having Adjustable Total Flow Area
01/15/2003EP1274919A1 Top drive for casing connection
01/15/2003CN2531102Y Girdle type mud shaker
01/14/2003US6505691 Subsea mud pump and control system
01/14/2003US6505685 Methods and apparatus for creating a downhole buoyant casing chamber
01/14/2003CA2106074C Masonry coring system
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