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)
10/2000
10/05/2000WO2000058602A1 Method and apparatus for cleaning boreholes
10/05/2000WO2000058600A1 Fire suppression apparatus for well drilling system
10/05/2000WO2000058599A1 Method of and apparatus for horizontal well drilling
10/04/2000EP1041244A2 Methods of downhole testing subterranean formations and associated apparatus therefor
10/04/2000EP1040231A1 Soil consolidation apparatus, tool and method
10/03/2000US6126872 Shell-core polymers
10/03/2000US6126822 Suction and discharge apparatus for drilling fluid
10/03/2000US6125952 Percussive down-the-hole hammer and a drill bit therefor
10/03/2000US6125786 Underground warning system for underground conduits or pipes
09/2000
09/28/2000WO2000057019A1 Device for drilling bore holes
09/27/2000EP1038086A1 Percussive tool
09/27/2000CN2398418Y Double-exciting double-layer drilling liquid oscillating screen
09/27/2000CN2398417Y High-efficient long-service-life screen mesh
09/27/2000CN1268068A Improved helical separator
09/26/2000US6123159 Aphron-containing well drilling and servicing fluids of enhanced stability
09/26/2000US6123151 Valve for use in a subsea drilling riser
09/21/2000WO2000055472A1 Downhole bypass valve
09/21/2000WO2000055469A1 Method and apparatus for underground drilling
09/21/2000WO2000054868A2 A method for the extraction of oil by microemulsification
09/20/2000EP1036251A1 Arrangement in a separator
09/20/2000CN2397476Y Hydraulic pulling-running stratified flow testing device
09/20/2000CN2397253Y High pressure sprayer
09/19/2000US6119772 Continuous flow cylinder for maintaining drilling fluid circulation while connecting drill string joints
09/19/2000CA2024866C Apparatus and facility for the cleaning of drains, particularly in an oil well
09/14/2000WO2000053887A2 Wellbore primary barrier and related systems
09/14/2000WO2000053885A2 Downhole apparatus
09/14/2000CA2365331A1 Downhole apparatus
09/13/2000EP1034355A1 Tool cooling system
09/13/2000EP1034354A1 Mill for use in a wellbore and method of milling
09/13/2000EP0741834B1 System, method and cutterhead for dry full-area drilling
09/12/2000US6116336 Wellbore mill system
09/12/2000CA2143349C Flow control sub for hydraulic expanding downhole tools
09/08/2000WO2000052377A1 Reverse circulation drilling system with hexagonal pipe coupling
09/08/2000WO2000052300A1 Rotating blowout preventer
09/08/2000WO2000052299A1 Internal riser rotating control head
09/08/2000WO2000052296A1 Swivel device
09/06/2000EP1033470A2 Downhole hydraulic path selection
09/05/2000US6112833 Bore hole drilling device
09/02/2000CA2299753A1 Downhole hydraulic path selection
08/2000
08/31/2000WO2000050731A1 Drilling method
08/30/2000EP0995011A4 Improved method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing
08/30/2000CN2394004Y Automatic controlling and comprehensive protecting apparatus for emulsified liquid pump station
08/29/2000US6110367 Closed device for treatment of drilling fluids and cuttings
08/29/2000US6109836 Soil consolidation apparatus, tool and method
08/29/2000US6109370 System for directional control of drilling
08/24/2000WO2000049622A1 A waste processing system and related methods
08/24/2000WO2000049326A1 Swivel seal assembly
08/24/2000WO2000049269A1 Method and apparatus for cleaning drill cuttings
08/24/2000WO2000049268A1 Casing mounted sensors
08/24/2000DE19906687A1 Drill has gear housing, drive motor, inner and outer pipe, gears, hollow shafts, and intermediate flanges
08/24/2000CA2320077A1 Swivel seal assembly
08/23/2000EP1029574A1 Knock-down separation of emulsions
08/22/2000US6106733 Method for re-cycling wellbore cuttings
08/22/2000US6105692 Swivel chamber for water actuated wireline drills
08/22/2000US6105689 Mud separator monitoring system
08/22/2000CA2150159C Wireline cable head for use in coiled tubing operations
08/17/2000WO2000047866A1 Improved method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing
08/17/2000WO2000047865A1 Single valve for a casing filling and circulating apparatus
08/17/2000WO2000047861A2 Hydraulic underreamer and sections for use therein
08/17/2000WO2000047692A1 Aphron-containing oil base fluids and method of drilling a well therewith
08/17/2000WO2000047690A1 Method of releasing stuck pipe or tools and spotting fluids therefor
08/17/2000CA2298782A1 Knock-down separation of emulsions
08/16/2000CN2391984Y Vibration sieve for treating drilling fluid
08/16/2000CN1263481A Fluids containing viscoelastic surfactant and methods for using the same
08/15/2000US6102673 Subsea mud pump with reduced pulsation
08/15/2000US6102310 System for homogenization of a slurry of segregated drill cuttings prior to injection into an earth formation comprising slurry tank with discharge port; conveyor; fluid injection line; transfer pump; and in-line micron grinder
08/15/2000US6102139 Device for drilling a bore hole in the ground
08/15/2000US6102138 Pressure-modulation valve assembly
08/15/2000US6102060 Detachable locking device for a control valve and method
08/15/2000CA2229882C Male pin connector
08/15/2000CA2229004C Female wet connector
08/10/2000WO2000046480A1 Drillstring bypass valve
08/09/2000EP1024907A2 Apparatus for recovering hydrocarbons from solids
08/09/2000CN2391003Y Fast joint for sand flushing oil and water borehole
08/03/2000WO2000045030A1 Valves for use in wells
08/03/2000WO2000045028A1 Slurry treatment
08/02/2000EP1024249A2 Downhole Tool
08/02/2000EP0820556B1 Cementing plug
08/01/2000US6097310 Method and apparatus for mud pulse telemetry in underbalanced drilling systems
08/01/2000US6096228 Apparatus and method for handling waste-C-I-P II
08/01/2000US6095249 Down hole bypass valve
08/01/2000US6094795 Rotary shear
07/2000
07/27/2000WO2000043634A2 Method and apparatus for formation isolation in a well
07/27/2000WO2000036267B1 Removal of oil and chloride from oil contaminated material
07/26/2000EP1021231A1 Improved helical separator
07/26/2000CN1261126A Efficient dusting system carried by coal-mining machine by means of high-voltage charging and mist spray
07/25/2000US6092612 Rotary drilling systems
07/21/2000CA2297136A1 One-trip window milling apparatus & method with measurement-while-drilling
07/20/2000WO2000041822A1 Screen assembly for use in a vibratory shaker
07/20/2000WO2000041487A2 Pipe assembly with a plurality of outlets for use in a wellbore and method for running such a pipe assembly
07/20/2000WO2000024844A3 Treatments for cuttings from offshore rigs
07/20/2000WO2000003600A3 Improved tubing handling for subsea oilfield tubing operations
07/19/2000EP1020507A2 Enhanced multicomponent mixtures for soil decomposition
07/19/2000EP1019614A1 Casing filling and circulating apparatus
07/19/2000EP1019611A1 Bypass valve for downhole motor
07/19/2000EP1019459A1 Oil based drilling fluids suitable for drilling in the presence of acidic gases
07/19/2000EP0886714B1 Device for drilling a bore hole in the ground
07/19/2000CN1260858A Extension drilling system
07/18/2000US6089332 Steerable rotary drilling systems
07/13/2000WO2000040335A1 A recovery apparatus for drilling and excavation applications and related methods
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