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)
11/2003
11/20/2003WO2003095789A1 Container for handling material
11/20/2003US20030213597 Safety check valve for coiled tubing
11/19/2003EP1362086A2 Oleaginous drilling fluid , method of use and bio-remediation of the same to produce a useful soil amendment
11/19/2003CN2586812Y Continuous sand flushing tool
11/18/2003US6648081 Subsea wellbore drilling system for reducing bottom hole pressure
11/18/2003CA2317252C Portable environmental containment system
11/18/2003CA2138859C Method and apparatus for providing a stream of inert gases in underbalanced drilling of a well bore
11/13/2003WO2003093792A2 Compositions and methods for sealing formations
11/13/2003WO2003063998A8 Cleaning of hydrocarbon-containing materials with critical and supercritical solvents
11/13/2003US20030212495 Real-time method for maintaining formation stability and monitoring fluid-formation interaction
11/13/2003US20030209350 Valve assembly for use in a wellbore
11/12/2003CN2585967Y Negative pressure bailing tube stringed appts.
11/11/2003US6644412 Flow control apparatus for use in a wellbore
11/11/2003US6644110 Measurements of properties and transmission of measurements in subterranean wells
11/09/2003CA2596413A1 Method and apparatus for removing cuttings from drilling fluids
11/06/2003US20030205142 Drilling fluid degasser
11/05/2003CN2584818Y Sand washing, oil receiving, sealing device for oil well
11/04/2003US6641730 Integrated debris management system
11/04/2003US6640912 Automatic control measures and records dry weight of cuttings removed from the hole and controls, slurry density and viscosity, as well monitoring and maintaining injection pressure to within established pressure parameters
11/04/2003US6640897 Method and apparatus for through tubing gravel packing, cleaning and lifting
11/04/2003US6640824 Mud saver kelly valve
10/2003
10/30/2003WO2003089756A1 Methods for increasing production from a wellbore
10/30/2003WO2003089755A1 Circulating sub
10/30/2003US20030201103 Well completion; solution of hollow particles for sealing well
10/30/2003US20030200995 Cleaning bore hole using high energy, low energy jets
10/29/2003EP1356188A1 Fluid mixing system
10/29/2003EP1356186A1 Cloded loop fluid-handing system for well drilling
10/28/2003US6637522 Enhanced computer control of in-situ drilling system
10/23/2003WO2003087529A1 Method of drilling with magnetorheological fluid
10/23/2003WO2003087526A1 Stabiliser, jetting and circulating tool
10/23/2003US20030196817 Methods for increasing production from a wellbore
10/23/2003US20030196804 Dynamic annular pressure control apparatus and method
10/23/2003CA2481863A1 Method of drilling with magnetorheological fluid
10/22/2003CN1450244A Set method for drilling fluid fixing-controlling technology
10/21/2003US6634423 Lifting top drive remote control cement head
10/21/2003US6634388 Annular fluid manipulation in lined tubular systems
10/16/2003WO2003085812A1 Magnetic power transmission devices for oilfield applications
10/16/2003US20030192812 Cuttings disposal method
10/16/2003US20030192439 Drilling fluid recovery and cuttings processing system
10/16/2003CA2481330A1 Magnetic power transmission devices for oilfield applications
10/15/2003CN2580094Y Medium and small rotary drill machine reverse circulation device
10/08/2003CN2578513Y Mud purifiers
10/07/2003US6629610 Screen with ramps for vibratory separator system
10/07/2003CA2277627C Annular fluid manipulation in lined tubular systems
10/02/2003WO2003080993A1 Method and application for open hole gravel packing
10/02/2003WO2003080991A1 System and method for recovering return fluid from subsea wellbores
10/02/2003US20030183393 Apparatus and method for the disposition of drilling solids during drilling of subsea oilfield wellbores
10/01/2003EP1348010A1 Invert emulsion drilling fluids and muds having negative alkalinity and elastomer compatibility
10/01/2003EP1141512B1 An apparatus and method for facilitating the connection of tubulars using a top drive
10/01/2003CN2577251Y Storage type flow meter for water-filling well
10/01/2003CN1446286A Multi-gradient drilling method and system
09/2003
09/28/2003CA2377424A1 Drilling-mud cooling system
09/25/2003US20030181338 Methods of improving well bore pressure containment integrity
09/23/2003US6625566 Pressure drop calculation method and system taking account of thermal effects
09/23/2003US6622796 Apparatus and method for facilitating the connection of tubulars using a top drive
09/23/2003US6622795 Flow actuated valve for use in a wellbore
09/18/2003WO2003076764A2 Method and system for controlling well circulation rate
09/18/2003US20030173088 Two string drilling system
09/18/2003US20030173073 Top drive casing system
09/17/2003CN2573657Y Sieve bed slope angle adjusting device for drilling fluid vibration sieve
09/16/2003CA2220385C Placing and cementing casing in horizontal wells
09/11/2003US20030168258 Method and system for controlling well fluid circulation rate
09/11/2003US20030167728 Advanced processes for coring and grouting masonry
09/10/2003EP0839255B1 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing
09/10/2003EP0777813B1 Formation isolation and testing apparatus and method
09/10/2003CN1441671A Fatty acid analogues for treatment of cancer
09/09/2003US6615932 Arrangement in rock drilling apparatus
09/09/2003CA2216045C Apparatus and method for preparation of liquid/solid slurries
09/04/2003WO2003072903A2 Drill cutting treatment method and apparatus
09/04/2003US20030166470 Valve and position control using magnetorheological fluids
09/04/2003US20030164276 Top drive casing system
09/04/2003US20030164253 Fluid drilling system
09/04/2003US20030164235 Slurry recovery process
09/03/2003EP1339938A2 Boring apparatus
09/03/2003EP1339937A2 Improved method for stimulation of liquid flow in a well
09/03/2003EP1015730B1 Oil and gas well cuttings disposal system with continuous vacuum operation for sequentially filling disposal tanks
09/03/2003EP1000219B1 A method of injecting drilling waste into a well while drilling
09/02/2003US6612547 Downhole flow control devices
09/02/2003CA2106136C Oilfield valve
08/2003
08/28/2003WO2003071091A1 Dynamic annular pressure control apparatus and method
08/28/2003WO2003071090A1 Methods of discovering and correcting subterranean formation integrity problems during drilling
08/28/2003WO2003071087A1 Pantograph underreamer
08/28/2003WO2003070393A1 Thermal process for treating hydrocarbon-contaminated drill cuttings
08/28/2003US20030162670 Methods of discovering and correcting subterranean formation integrity problems during drilling
08/28/2003US20030159310 Cuttings treatment system
08/27/2003EP1338755A2 Well treatment methods
08/27/2003EP1337759A2 Hydraulic drill string accumulator
08/27/2003EP1337306A1 A screen assembly for a vibratory separator
08/27/2003EP1068425B1 Drillstring with stabilisers for re-entering a primary wellbore
08/27/2003CN2568802Y Negative pressure bailing and sand sucking head
08/27/2003CN1119635C Method for measuring vibration trace
08/27/2003CN1119501C Method and tool for fracturing an underground formation, increasing recovery rate and injecting a proppant into the fracture
08/26/2003US6609578 Shale hydration inhibition agent and method of use
08/21/2003WO2003069123A2 Drilling fluid screen and method
08/21/2003WO2003069112A1 Wellhead seal unit
08/21/2003US20030155158 Thermal process for treating hydrocarbon-contaminated drill cuttings
08/21/2003US20030155156 Two string drilling system using coil tubing
08/20/2003CN1437674A System for creating conduit in a borehole formed in an earth formation
08/19/2003US6609067 Real-time method for maintaining formation stability and monitoring fluid-formation interaction
08/19/2003US6607659 Drilling mud reclamation system with mass flow sensors
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