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)
08/2003
08/19/2003US6607607 Coiled tubing wellbore cleanout
08/19/2003US6607080 Screen assembly for vibratory separators
08/19/2003US6607042 Method of dynamically controlling bottom hole circulation pressure in a wellbore
08/14/2003US20030151978 Method and apparatus enhanced acoustic mud pulse telemetry
08/14/2003US20030151522 Method and apparatus for enhanced acoustic mud pulse telemetry during underbalanced drilling
08/14/2003US20030150621 Well control
08/14/2003US20030150616 Drilling fluid screen and method
08/14/2003US20030150610 Device for sealing a drill hole and for discharging drillings or stripped extraction material
08/13/2003EP1335107A2 A method for collecting geological data
08/13/2003EP1335106A2 Casing data relay
08/13/2003EP1335105A2 A method for collecting geological data
08/13/2003EP1335104A2 Method for preventing formation fracturing
08/13/2003EP1335103A2 Method of determining the curing of cement downhole
08/13/2003EP1333904A2 A screen for a shale shaker
08/13/2003EP1144804B1 Method for detecting inflow of fluid in a well while drilling and implementing device
08/13/2003EP0993334B1 Fluids containing viscoelastic surfactant and methods for using the same
08/13/2003CN2565974Y Universal-joint connected pipe
08/12/2003US6604578 Tubular filling system
08/12/2003CA2391732C Production tubing joint
08/12/2003CA2371371A1 Gas buster
08/07/2003WO2003063998A1 Cleaning of hydrocarbon-containing materials with critical and supercritical solvents
08/07/2003US20030146219 Apparatus
08/07/2003US20030146001 Apparatus and method to reduce fluid pressure in a wellbore
08/06/2003EP1332273A1 Downhole valve device
08/05/2003US6602181 Treatments for drill cuttings
08/05/2003US6601709 Screen support and screens for shale shakers
08/05/2003US6601662 Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strength
07/2003
07/31/2003WO2003062592A1 Cuttings disposal method
07/31/2003WO2003062591A1 Soil cleaning systems and methods
07/31/2003WO2003062590A1 Two string drilling system using coil tubing
07/31/2003WO2003062589A1 Two string drilling system
07/31/2003US20030141055 Drilling formation tester, apparatus and methods of testing and monitoring status of tester
07/31/2003CA2473256A1 Soil cleaning systems and methods
07/30/2003EP1331356A2 Backflow regulator downhole valve
07/30/2003EP1330590A1 Continuous circulation drilling method
07/30/2003EP1175546B1 Abrasive jet drilling assembly
07/30/2003EP1163037B1 Screen assembly, vibratory separator and method of screening
07/30/2003EP1034354B1 Mill for use in a wellbore and method of milling
07/29/2003US6598849 Pressure compensation/control for fail-safe gate valve
07/29/2003US6598685 Drilling fluid screen and method
07/29/2003US6598682 Reservoir communication with a wellbore
07/29/2003CA2417553A1 Pdf valve
07/24/2003US20030139916 Method for simulating subsea mudlift drilling and well control operations
07/24/2003US20030136747 Soil cleaning systems and methods
07/24/2003US20030136584 Method and apparatus for removing fluids from drill cuttings
07/24/2003US20030136563 Surge pressure reduction apparatus with volume compensation sub
07/24/2003US20030136560 Method for drilling and completing boreholes with electro-rheological fluids
07/23/2003EP1328458A1 Device for transporting particles of magnetic material
07/23/2003EP1019614A4 Casing filling and circulating apparatus
07/23/2003CN2561916Y Double vehicle combined water injecting clean-out vehicle
07/23/2003CN2561915Y Sand washover device as sucking operation
07/23/2003CA2416964A1 Method for drilling and completing boreholes with electro-rheological fluids
07/22/2003US6595288 Method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing
07/22/2003US6595281 Apparatus for delivering a flowable substance to a remote location
07/17/2003US20030132031 Hard rock drilling device and method
07/17/2003US20030132028 Arrangement for the removal of cuttings and gas arising from drilling operations
07/17/2003US20030132002 Lifting top drive remote control cement head
07/16/2003EP1327051A2 Dual valve well control in underbalanced wells
07/16/2003EP1327050A1 Cement shoe assembly for monobore well
07/16/2003EP0961866B1 Closed device for treatment of drilling fluids and cuttings
07/15/2003US6592985 Polycrystalline diamond partially depleted of catalyzing material
07/15/2003US6591921 Horizontal boring apparatus
07/15/2003US6591916 Drilling method
07/10/2003WO2003056127A1 Pressure compensation/control for fail-safe gate valve
07/10/2003WO2003055569A1 A screen assembly for a vibratory separator
07/10/2003US20030127903 Low shear treatment for the removal of free hydrocarbons, including bitumen, from cuttings
07/10/2003US20030127230 Method for formation pressure control while drilling
07/09/2003EP1325208A2 Use of water soluble demulsifiers in separating hydrocarbon oils from clays
07/09/2003CN2559775Y Constant pressure throttling apparatus
07/08/2003US6589917 For drilling subterranean wells such as gas or oil wells
07/08/2003US6589640 Polycrystalline diamond partially depleted of catalyzing material
07/08/2003US6588501 Method and apparatus to reduce hydrostatic pressure in sub sea risers using buoyant spheres
07/08/2003CA2313980C Method of reducing the concentration of metal soaps of partially esterified phosphates from hydrocarbon flowback fluids
07/01/2003US6585115 Apparatus and method for transferring dry oil and gas well drill cuttings
07/01/2003US6585064 Polycrystalline diamond partially depleted of catalyzing material
07/01/2003US6585044 Method, system and tool for reservoir evaluation and well testing during drilling operations
06/2003
06/26/2003US20030117890 Manifold for mixing device
06/26/2003US20030116733 Pressure compensation/control for fail-safe gate valve
06/26/2003US20030116320 Circulating cementing collar and method
06/25/2003EP1321624A1 Self-filling cementing collar and method
06/24/2003US6581859 Method and apparatus for homogenizing drilling fluid in an open-loop process
06/24/2003US6581781 Vibrator separator screens
06/24/2003US6581701 Methods for reducing lost circulation in wellbores
06/24/2003US6581692 Making up and breaking out of a tubing string in a well white maintaining continuous circulation
06/24/2003US6581455 Modified formation testing apparatus with borehole grippers and method of formation testing
06/20/2003CA2414649A1 Circulating cementing collar and method
06/19/2003WO2003004828A8 Multi-cycle downhole apparatus
06/18/2003EP1190156B1 Downhole apparatus
06/18/2003CN1111927C Plug-in and receptacle of electric connector
06/17/2003US6579832 Method for treating drilling fluid using nanoparticles
06/17/2003US6578646 Method and arrangement for reducing dust-related problems in rock drilling
06/17/2003US6578637 Method and system for storing gas for use in offshore drilling and production operations
06/17/2003US6578632 Swing mounted fill-up and circulating tool
06/12/2003WO2003048526A2 Composition for use in sealing a porous subterranean formation, and methods of making and using
06/12/2003WO2003048525A1 Method for formation pressure control while drilling
06/12/2003WO2003048509A1 Flow actuated valve for use in a wellbore
06/12/2003WO2003048508A1 Method and device for injecting a fluid into a formation
06/12/2003US20030108393 System for creating a conduit in a borehole formed in an earth formation
06/12/2003US20030106718 Shale hydration inhibition agent and method of use
06/12/2003US20030106713 Proppant recovery system
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