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)
07/2000
07/13/2000DE19902784A1 Suspension of water and betonite and other additives removes tunnel spoil for subsequent separation and re-use of suspension
07/11/2000CA2093041C System and method for controlling drill bit usage and well plan
07/06/2000WO2000039433A1 Method for detecting inflow of fluid in a well while drilling and implementing device
07/06/2000WO2000039431A1 Method and device for adjusting at a set value the bore fluid level in the riser
07/06/2000WO2000039430A1 Apparatus and method for facilitating the connection of tubulars using a top drive
07/06/2000WO2000039429A1 An apparatus and method for facilitating the connection of tubulars using a top drive
07/05/2000EP1015730A4 Oil and gas well cuttings disposal system with continuous vacuum operation for sequentially filling disposal tanks
07/05/2000EP1015730A1 Oil and gas well cuttings disposal system with continuous vacuum operation for sequentially filling disposal tanks
07/05/2000EP1012443A4 Subsurface measurement apparatus, system, and process for improved well drilling, control, and production
07/04/2000US6082459 Drill string diverter apparatus and method
07/04/2000US6082457 Method of using a drill string tool
07/04/2000US6082451 Wellbore shoe joints and cementing systems
06/2000
06/28/2000EP1012443A1 Subsurface measurement apparatus, system, and process for improved well drilling, control, and production
06/28/2000EP1012442A2 A plug for use in wellbore operations, an apparatus for receiving said plug, a plug landing system and a method for cementing tubulars in a wellbore
06/28/2000EP1012440A1 Boring device
06/28/2000EP1000219A4 A method of injecting drilling waste into a well while drilling
06/28/2000CN2385075Y Mud pump for petroleum geologic exploration drilling machine
06/27/2000US6079508 Ultrasonic processors
06/27/2000US6079496 Reduced-shock landing collar
06/22/2000WO2000036267A1 Removal of oil and chloride from oil contaminated material
06/20/2000CA2289147C Apparatus for separating components in well fluids
06/15/2000WO2000034619A1 Deep ocean drilling method
06/15/2000WO2000034618A1 Deep ocean drilling system
06/13/2000US6074563 Dehydration of drilling fluids
06/13/2000US6073709 Selective apparatus and method for removing an undesirable cut from drilling fluid
06/13/2000US6073708 Downhole mud pressure intensifier
06/13/2000CA2179184C Whipstock apparatus and methods of use
06/07/2000EP0900320A4 System and method for placement and retrieval of a subsurface diverting tool used in drilling and completing wells
06/07/2000CN2381768Y Cycling device for circulation and counter-circulation of drill by two pumps
06/07/2000CN2381767Y Filter for drill pipe
06/02/2000CA2792184A1 Method and system for accessing subterranean deposits from the surface
05/2000
05/30/2000CA2036926C Suspending medium for water soluble polymer
05/25/2000WO2000029715A1 Flow control and isolation in a wellbore
05/25/2000WO2000029712A1 Apparatus for delivering a flowable substance to a remote location
05/25/2000WO2000029710A2 Wellbore flow control device
05/24/2000EP1002588A1 Panel for a screen
05/24/2000EP0753161B1 Acoustic sensor
05/23/2000US6065550 Method and system for drilling and completing underbalanced multilateral wells utilizing a dual string technique in a live well
05/17/2000EP1000220A1 Bypass valve closing means
05/17/2000EP1000219A1 A method of injecting drilling waste into a well while drilling
05/16/2000US6062905 Male pin connector
05/16/2000US6062313 Expandable tank for separating particulate material from drilling fluid and storing production fluids, and method
05/11/2000WO2000026576A1 Method and device in down-the-hole drilling
05/11/2000WO2000025942A1 A screen for use in a shale shaker
05/10/2000EP0998620A1 Simulating the control of solids in drilling fluids, and application to determining the size of cuttings
05/10/2000EP0960259A4 Aphron-containing well drilling and servicing fluids
05/09/2000US6059038 Auto-fill sub
05/09/2000US6059030 Sand recovery unit
05/09/2000US6058771 Determination of fluid influx or efflux
05/04/2000WO2000024844A2 Treatments for cuttings from offshore rigs
05/03/2000EP0997607A2 Vacuum Tank for use in handling oil and gas well cuttings
05/03/2000EP0502882B1 Method and apparatus for cleaning drill cuttings
05/03/2000CN2376530Y Mud making-up skid for well drilling
05/03/2000CN2376529Y Rotatable stabilizing wax scraper
05/02/2000US6056053 Cementing systems for wellbores
04/2000
04/27/2000WO2000023686A1 Making up and breaking out of a tubing string in a well while maintaining continuous circulation
04/27/2000WO2000023538A1 Removal of h2s in drilling mud
04/27/2000WO2000005506A3 Annular fluid manipulation in lined tubular systems
04/27/2000DE19849028A1 Flushing air barrier for drill pipes has an operating mechanism which is triggered by changes in the drilling fluid pressure for well drilling to depths of several hundred meters
04/26/2000EP0995011A1 Improved method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing
04/26/2000EP0995009A1 Device and method for measuring the flow rate of drill cuttings
04/25/2000US6053261 Flow pulsing method and apparatus for the increase of the rate of drilling
04/20/2000WO2000022278A1 Drilling method
04/20/2000WO2000004269A3 Subsea wellbore drilling system for reducing bottom hole pressure
04/19/2000EP0994236A2 Indexing mechanism
04/19/2000EP0993334A1 Fluids containing viscoelastic surfactant and methods for using the same
04/19/2000CN2374640Y Coal-cutting machinery carryed high voltage electric spraying dust removing appts.
04/18/2000US6050334 Single trip whipstock assembly
04/18/2000US6050141 Method and apparatus for acoustic logging of fluid density and wet cement plugs in boreholes
04/18/2000CA2184535C Apparatus and method for separation of solids from liquid
04/12/2000EP0991847A1 Downhole surge pressure reduction system and method of use
04/12/2000CN2373557Y Drilling fluid volume instrument
04/11/2000US6047773 Apparatus and methods for stimulating a subterranean well
04/06/2000WO2000019060A1 Tubular filling system
04/05/2000EP0990765A1 Percussive core barrel
04/04/2000US6047239 Formation testing apparatus and method
04/04/2000US6045702 Separating said water-soluble polymer into a plurality of permeate and retentate phases using an organic or mineral membrane by differences therebetween in hydrodynamic volume in a continuous or batch process
04/04/2000US6045171 Spear head assembly
04/04/2000US6045070 Materials size reduction systems and process
03/2000
03/29/2000EP0989284A2 Underbalanced well completion
03/29/2000EP0988438A1 Extension drilling system
03/29/2000CN1249015A Downhole clutch with flow ports
03/28/2000US6041873 Non-cryogenic nitrogen for on-site downhole drilling and post drilling operations
03/28/2000US6041865 Method and apparatus for moving a diverter
03/28/2000US6041864 Well isolation system
03/22/2000EP0986690A1 Valve for use in a wellbore
03/21/2000US6039128 Method and system for obtaining core samples during the well-drilling phase by making use of a coring fluid
03/16/2000WO2000014378A1 Gas impulse device and method of use thereof
03/15/2000EP0985799A2 Underbalanced well completion
03/15/2000EP0985797A2 Underbalanced well completion
03/15/2000CN2368971Y Degradable plastic sand-proof screen casing
03/14/2000US6036870 Method of wellbore fluid recovery using centrifugal force
03/14/2000US6036749 Variable ptich helices; operates on combined cetrifugal and gravitational forces; separation of gases in drilling fluids in petroleum wells
03/14/2000US6035953 Down hole hammer assembly
03/14/2000US6035952 Closed loop fluid-handling system for use during drilling of wellbores
03/14/2000US6035880 Pressure activated switch valve
03/09/2000WO1999064356A9 Processing system
03/08/2000EP0778914A4 Drill casing installation equipment with external friction reducing means
03/07/2000US6032806 Screen apparatus for vibratory separator
03/07/2000US6032747 Water-based drilling fluid deacidification process and apparatus
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