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)
06/2005
06/16/2005US20050129950 Polycrystalline Diamond Partially Depleted of Catalyzing Material
06/16/2005US20050126828 Self-blocking fishing device
06/16/2005CA2546939A1 An apparatus and process for removing liquids from drill cuttings
06/15/2005EP1540132A1 Fast valve actuator and tool provided with same
06/15/2005EP1540131A2 "top drive swivel apparatus and method"
06/15/2005EP1540126A2 Shale hydration inhibition agent and method of use
06/15/2005CN1206441C Reverse cycle drilling method and equipment for oil well or gas well
06/14/2005US6904982 Subsea mud pump and control system
06/14/2005US6904981 Dynamic annular pressure control apparatus and method
06/14/2005CA2218106C Cementing plug
06/12/2005CA2472857A1 Self-blocking fishing device
06/09/2005WO2005052709A1 Method and apparatus to control the rate of flow of a fluid through a conduit
06/09/2005WO2005052314A1 Downhole swivel joint assembly and method of using said swivel joint assembly
06/09/2005WO2005052307A1 A method and device for controlling drilling fluid pressure
06/09/2005WO2005052305A1 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
06/09/2005WO2005052302A2 Actuating mechanism
06/09/2005WO2004101473A3 Under-neutralized alkylxylene sulfonic acid composition for enhanced oil recovery processes
06/09/2005US20050121233 Filter assembly having a bypass passageway
06/09/2005CA2546219A1 Downhole swivel joint assembly and method of using said swivel joint assembly
06/08/2005EP1537292A1 Ball operated by-pass tool for use in drillstring
06/08/2005EP1537291A1 Drilling method
06/08/2005EP1537290A1 Automated pipe joining system
06/08/2005EP1128913B1 A screen for use in a shale shaker
06/02/2005WO2005049960A1 Downhole tool
06/02/2005WO2005049959A1 Downhole tool
06/02/2005WO2005049958A1 Device for removal and filtration of drilling fluid
06/02/2005WO2004094771A3 Vibratory screening machine for earth drilling installation
06/02/2005US20050119796 Method and apparatus to control the rate of flow of a fluid through a conduit
06/02/2005US20050115744 High Volume Density Polycrystalline Diamond With Working Surfaces Depleted Of Catalyzing Material
06/02/2005US20050115715 Wellhead seal unit
06/02/2005US20050115714 Fast valve actuator and tool provided with same
06/02/2005US20050115709 Method and system for controlling pressure in a dual well system
06/02/2005DE102004048615A1 Well treatment system for achieving transient underbalance condition in wellbore, comprises surge charge adapted upon activation to penetrate housing and not penetrate material exterior of housing
06/02/2005CA2546358A1 Downhole tool
06/02/2005CA2546340A1 Downhole tool
06/02/2005CA2544596A1 Low friction face sealed reaction turbine rotors
06/01/2005EP1536100A2 Underbalanced well completion
06/01/2005CN1621656A Method for configuring and maintaining long section barefoot drilling fluid
05/2005
05/31/2005US6899188 Down hole drilling assembly with concentric casing actuated jet pump
05/31/2005US6899179 Bypass valve
05/31/2005CA2254815C Multi-cycle circulating sub
05/26/2005WO2005046894A1 Oil contaminated substrate treatment method and apparatus
05/26/2005US20050109540 Method of drilling with magnetorheological fluid
05/26/2005US20050109505 Method and system for extraction of resources from a subterranean well bore
05/26/2005US20050109503 Drill pipe screen
05/26/2005CA2547908A1 Oil contaminated substrate treatment method and apparatus
05/26/2005CA2489501A1 Drill pipe screen
05/25/2005EP1532347A1 Closed loop multiphase underbalanced drilling process
05/25/2005EP1425494A4 Swing mounted fill up and circulating tool
05/25/2005CN1203294C Cement mortar flow metering method for dam foundation rock grouting
05/24/2005US6896075 Apparatus and methods for drilling with casing
05/24/2005US6896050 Latching system for maintaining position of component within a downhole drill string section
05/24/2005CA2380308C A method and apparatus for treating pressurized drilling fluid returns from a well
05/19/2005WO2005045180A1 Actuating mechanism
05/19/2005WO2005045179A1 Method and system for degassing a fluid
05/19/2005WO2004092544A3 Method and apparatus for increasing drilling capacity and removing cuttings when drilling with coiled tubing
05/18/2005CN2700544Y Device for automatically desanding from sand washing liquid
05/17/2005US6892888 Screen with unibody structure
05/17/2005US6892887 Polymer drilling bead recovery system and related methods
05/17/2005US6892831 Method and apparatus for boring through a solid material
05/17/2005US6892829 Two string drilling system
05/17/2005CA2365710C Method and apparatus for drilling and completing a well
05/17/2005CA2262279C Down hole, hydrodynamic well control, blowout prevention
05/12/2005WO2005042917A1 Underbalanced well drilling and production
05/12/2005WO2005042911A2 System for drilling oil and gas wells using oversized drill string to achieve increased annular return velocities
05/12/2005US20050098351 Downhole valve device
05/12/2005US20050098349 Control systems and methods for active controlled bottomhole pressure systems
05/11/2005CN2698960Y Liquid tank with filtration and deposition function
05/11/2005CN2698959Y Full automatic powder feeding and mixing device
05/06/2005WO2005040833A1 Regulation of human metastin recognising receptors
05/06/2005WO2005040550A1 Zeolite-containing cement composition
05/06/2005WO2005040546A1 Fluid jet drilling tool
05/06/2005WO2005040544A2 Internal blow out preventer ball and seat
05/06/2005CA2544093A1 Fluid jet drilling tool
05/05/2005US20050096848 Automatic control system and method for bottom hole pressure in the underbalance drilling
05/05/2005US20050092671 Apparatus for recycling of oil-based drilling fluid contaminated with water and water contaminated with oil based drilling fluid
05/05/2005US20050092523 Well pressure control system
05/05/2005US20050092522 Underbalanced well drilling and production
05/05/2005US20050092498 Methods for increasing production from a wellbore
05/05/2005US20050092490 Completion apparatus and methods for use in hydrocarbon wells
05/04/2005CN2697304Y Foam generator
05/04/2005CN1611742A Under balance drilling bottom pressure automatic control system and method
05/03/2005US6886273 Apparatus and method for separating hydrocarbons from material
04/2005
04/28/2005WO2005038189A1 Nozzle unit and method for excavating a hole in an object
04/28/2005US20050090405 Vermiculture compositions
04/28/2005CA2542413A1 Nozzle unit and method for excavating a hole in an object
04/27/2005CN2695678Y Rotation sand pump
04/27/2005CN2695610Y Corrugation-shaped screen mesh
04/26/2005US6883613 Flow control apparatus for use in a wellbore
04/26/2005US6883605 Wellbore cleanout tool and method
04/26/2005CA2236863C Down hole bypass valve
04/26/2005CA2145283C Method for calculating sedimentary rock pore pressure
04/21/2005WO2005035934A2 Solid-liquid separation of oil-based muds
04/21/2005US20050081918 Internal blow out preventer ball and seat
04/21/2005CA2540560A1 Solid-liquid separation of oil-based muds
04/20/2005EP1421253A4 System for controlling the operating pressures within a subterranean borehole
04/20/2005CN2693938Y Drilling fluid desander
04/19/2005US6881349 Method for recycling of oil based drilling fluid contaminated with water and water contaminated with oil based drilling fluid
04/14/2005WO2005033469A1 Cleaning contaminated materials
04/14/2005CA2543523A1 Cleaning contaminated materials
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