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)
06/2003
06/12/2003US20030106712 Internal riser rotating control head
06/12/2003CA2468732A1 Method for formation pressure control while drilling
06/11/2003CN2555386Y Slarry cycling appts.
06/10/2003US6575244 System for controlling the operating pressures within a subterranean borehole
06/05/2003WO2003046330A1 Method and device for boring holes
06/05/2003US20030104949 Composition for use in sealing a porous subterranean formation, and methods of making and using
06/05/2003US20030102163 Method for determining sweep efficiency for removing cuttings from a borehole
06/05/2003US20030102131 Mudsaver valve with retrievable inner sleeve
06/05/2003US20030102018 Device for rinsing bores
06/04/2003EP0944421B1 Apparatus and method for separation of solids from liquid
06/04/2003CN2554336Y Sand wash devcie with protecting oil reservoir function
06/03/2003US6571880 Method and multi-purpose apparatus for control of fluid in wellbore casing
06/03/2003US6571876 Fill up tool and mud saver for top drives
06/03/2003US6571873 Method for controlling bottom-hole pressure during dual-gradient drilling
06/03/2003US6571869 Downhole surge pressure reduction and filtering apparatus
06/03/2003CA2364348A1 Mudsaver valve with retrievable inner sleeve
05/2003
05/29/2003US20030100452 Method of recycling water contaminated oil based drilling fluid
05/29/2003US20030098181 Active controlled bottomhole pressure system & method
05/29/2003US20030098180 Oleaginous drilling fluid that produces a useful soil amendment, method of use and bio-remediation of the same and resulting solids
05/29/2003US20030098163 Flow actuated valve for use in a wellbore
05/29/2003US20030098159 Method and apparatus for unloading well tubing
05/29/2003US20030097772 Excavation cleanup device
05/28/2003EP1313463A1 Fatty acid analogues for the treatment of cancer
05/28/2003EP1141513B1 Apparatus and method for facilitating the connection of tubulars using a top drive
05/28/2003EP1125036B1 Making up and breaking out of a tubing string in a well while maintaining continuous circulation
05/27/2003US6568485 Stalled motor by-pass valve
05/22/2003WO2003042495A1 Plug setting apparatus and method
05/22/2003WO2003042494A1 Method and apparatus for borehole stabilisation
05/22/2003US20030094285 Valve assembly
05/22/2003US20030094276 Rotating drilling stripper
05/21/2003EP1040231B1 Soil consolidation apparatus, tool and method
05/20/2003US6565698 Method for making vibratory separator screens
05/20/2003CA2097198C Method for treating drill cuttings during oil and gas drilling
05/15/2003WO2003040514A2 Proppant recovery system
05/15/2003US20030089505 Downhole surge pressure reduction and filtering apparatus
05/15/2003US20030089498 Controlling transient underbalance in a wellbore
05/14/2003CN2550479Y Hydraulic power synergy device for drill bit
05/13/2003US6562763 Method and apparatus for homogenizing drilling fluid in an open-loop process
05/13/2003US6562462 High volume density polycrystalline diamond with working surfaces depleted of catalyzing material
05/13/2003US6561289 Bottomhole assembly and methods of use
05/13/2003US6561275 Apparatus for controlling fluid flow in a conduit wall
05/13/2003US6561274 Combustible fuel cell can be placed in the tubular member below the fluid and ignited to generate gas
05/08/2003WO2003021074A8 Apparatus and method for transporting waste materials
05/07/2003EP1307633A1 Activating ball assembly for use with a by-pass tool in a drill string
05/06/2003US6557637 Subsea riser disconnect and method
05/02/2003EP1305100A1 A screen arrangement and a support structure for a vibratory separator
05/02/2003EP1012440B1 Boring device
05/02/2003EP0998620B1 Simulating the control of solids in drilling fluids, and application to determining the size of cuttings
05/02/2003EP0963502B1 Downhole clutch with flow ports
05/01/2003WO2003036015A1 Method and apparatus for enclosing an oil drilling rig
05/01/2003WO2003035289A1 Apparatus and method for separating hydrocarbons from materials
05/01/2003US20030079914 Method and apparatus for enclosing an oil drilling rig
05/01/2003US20030079912 Drilling system and method
05/01/2003US20030079370 Method and apparatus for separating hydrocarbons from material
04/2003
04/30/2003CN2547865Y New-type gear speed-reducing mud agitator
04/30/2003CN2547859Y Explosion-proof wet drill using hydraulic source as power source
04/29/2003US6554076 Hydraulically activated selective circulating/reverse circulating packer assembly
04/29/2003US6553901 Drilling fluid recovery and cuttings processing system
04/24/2003US20030075324 To stimulate hydrocarbon production and prevent the production of fine particulate materials
04/23/2003CN2546617Y Mud pump driving device simultaneously driving drilling machine
04/23/2003CN1413286A Subsea well intervention vessel
04/22/2003US6550552 Method for the removal and recovery of the oil component from drill cuttings
04/22/2003CA2359522A1 Sample catcher for underbalanced drilling operations
04/17/2003US20030072208 Automated cement mixing system
04/17/2003US20030070840 Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications
04/17/2003US20030070816 Methods and apparatus for creating a downhole buoyant casing chamber
04/17/2003US20030070815 Methods and apparatus for creating a downhole buoyant casing chamber
04/17/2003US20030070814 Methods and apparatus for creating a downhole buoyant casing chamber
04/17/2003US20030070806 Apparatus and method for locating joints in coiled tubing operations
04/16/2003EP1302624A1 Locating joints in coiled tubing operations
04/16/2003CN2545356Y Self-synchronous Translation elliptic vibrating screen
04/15/2003US6547007 PDF valve
04/10/2003WO2003029600A2 Cementing system for wellbores
04/10/2003WO2003028907A1 Vibratory separator and screen assembly
04/10/2003US20030066687 Annular pressure spool
04/10/2003US20030066684 Enlargement drilling system
04/10/2003US20030066653 Method and apparatus for controlling well pressure in open-ended casing
04/10/2003US20030066650 Drilling system and method for controlling equivalent circulating density during drilling of wellbores
04/10/2003US20030066643 Methods of downhole testing subterranean formations and associated apparatus therefor
04/09/2003EP1300543A1 Underreamer drilling system
04/09/2003EP0854897B1 Improved oil-based drilling fluid
04/09/2003CN1105404C Female wet connector socket
04/08/2003US6544308 High volume density polycrystalline diamond with working surfaces depleted of catalyzing material
04/08/2003US6543532 Electrical surface activated downhole circulating sub
04/08/2003CA2338510C Aphron-containing well drilling and servicing fluids of enhanced stability
04/08/2003CA2239645C Method and apparatus for locating a drill bit when drilling out cementing equipment from a wellbore
04/08/2003CA2097197C Plant for treating drill cuttings
04/05/2003CA2358242A1 Annular pressure spool
04/03/2003US20030062298 Integrated debris management system
04/03/2003US20030062199 Method or drilling sub-sea oil and gas production wells
04/03/2003US20030062198 Method and system for hydraulic friction controlled drilling and completing geopressured wells utilizing concentric drill strings
04/03/2003US20030062161 Cementing system for wellbores
04/02/2003EP1297241A1 Method for drilling and casing a wellbore with a pump down cement float
04/02/2003EP0960261B1 Tool and method for drilling a lateral well
04/02/2003EP0927294B1 Coupling piece for use at simultaneous earth and/or rock drilling with an upper rotary percussion device and a lower percussion device
04/02/2003CN1407207A Shallow drill assembly with separate jet pump
04/01/2003US6540034 Portable seismic shothole drilling system
04/01/2003US6540021 Method for detecting inflow of fluid in a well while drilling and implementing device
03/2003
03/27/2003WO2003025336A1 Active controlled bottomhole pressure system & method
03/27/2003WO2003025335A1 Method of reducing the density of drilling mud
1 ... 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 ... 138