| Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780) |
|---|
| 02/05/2008 | US7325610 Methods and apparatus for handling and drilling with tubulars or casing |
| 02/05/2008 | US7325609 Completion apparatus and methods for use in hydrocarbon wells |
| 02/05/2008 | US7325607 Methods and systems for using high-yielding non-Newtonian fluids for severe lost circulation prevention |
| 02/05/2008 | CA2454594C Method and apparatus for surge pressure reduction in a tool with fluid motivator |
| 01/30/2008 | EP1882808A1 Flow restrictor coupling |
| 01/30/2008 | EP1882079A2 Method for servicing a well bore using a mixing control system |
| 01/30/2008 | CN201013347Y Monitoring apparatus for well-repairing automatic level |
| 01/30/2008 | CN201013279Y Down-hole fluid flow reversing arrangement |
| 01/30/2008 | CN201013278Y Drilling fluid tank sand cleaning device |
| 01/30/2008 | CN201013277Y Quick-speed installing type sludge reclaiming pipe line |
| 01/30/2008 | CN201013276Y Oil well two-stage oil pipe combination sand flushing pipe column |
| 01/30/2008 | CN201013226Y Automatic percussion pumping-up reverse circulation drill |
| 01/30/2008 | CN100364742C Punching tool |
| 01/29/2008 | US7322432 Fluid diverter tool and method |
| 01/29/2008 | US7322431 Advanced ultrasonic processor |
| 01/29/2008 | US7322419 Circulating sub and method |
| 01/29/2008 | US7322418 Continuous circulation drilling method |
| 01/29/2008 | CA2320998C Method and system for drilling and completing underbalanced multilateral wells |
| 01/29/2008 | CA2284639C Subsurface measurement apparatus, system, and process for improved well drilling, control, and production |
| 01/24/2008 | WO2008010174A2 Dust particle catcher for a drilling apparatus |
| 01/23/2008 | EP1880075A2 Flow through subassembly for a downhole drill string and method for making same |
| 01/23/2008 | CN101109276A Rock bolt |
| 01/23/2008 | CN101109275A Conveying system for drilling fluids |
| 01/22/2008 | US7320365 Methods for increasing production from a wellbore |
| 01/17/2008 | WO2008007973A1 Pipe string device for conveying a fluid from a well head to a vessel |
| 01/17/2008 | WO2008007066A1 Selective agitation of downhole apparatus |
| 01/17/2008 | WO2007118110A3 Drilling systems and methods |
| 01/17/2008 | US20080011480 Downhole surge pressure reduction and filtering apparatus |
| 01/17/2008 | CA2658162A1 Selective agitation of downhole apparatus |
| 01/17/2008 | CA2657557A1 Pipe string device for conveying a fluid from a well head to a vessel |
| 01/16/2008 | EP1689966B1 Nozzle unit and method for excavating a hole in an object |
| 01/16/2008 | CN201007189Y Slurry overflows tube bank |
| 01/16/2008 | CN201007188Y Grief stem water hose connecting fixing device |
| 01/16/2008 | CN201007183Y Novel oil-well rig compound gearing device |
| 01/15/2008 | CA2487012C Method and apparatus to reduce downhole surge pressure using hydrostatic valve |
| 01/15/2008 | CA2393302C Method for cleaning a gas well |
| 01/15/2008 | CA2385739C Method and apparatus for removing cuttings from drilling fluids |
| 01/15/2008 | CA2231555C Improved oil-based drilling fluid |
| 01/10/2008 | WO2008005714A2 Downhole abrading tools having a hydrostatic chamber and uses therfor |
| 01/10/2008 | WO2008004255A1 BORiNG HEAD WITH NEW PROTECTION HOOD |
| 01/10/2008 | CA2656632A1 Boring head with new protection hood |
| 01/10/2008 | CA2656619A1 Method for improved well control with a downhole device |
| 01/10/2008 | CA2593579A1 Improved flock tank |
| 01/10/2008 | CA2551684A1 Improved flock tank |
| 01/09/2008 | EP1875040A2 Stimulation tool having a sealed ignition system |
| 01/09/2008 | EP1875036A1 Device for extracting at least one type of gas contained in a drilling mud, an analysis arrangement and a related extraction method |
| 01/09/2008 | CN201003403Y Underground engineering rock modification foam generator |
| 01/09/2008 | CN201003386Y Drilling mud jug cleaning device |
| 01/09/2008 | CN201003372Y Modular drilling machine |
| 01/08/2008 | US7316991 Composition and process for oil extraction |
| 01/08/2008 | US7316278 Method for determining drilling malfunction by correlation of drilling operating parameters and drilling response parameters |
| 01/08/2008 | CA2457650C Method and apparatus for determining downhole pressures during a drilling operation |
| 01/08/2008 | CA2430308C Aqueous drilling muds fluidified by means of zirconium and aluminum complexes |
| 01/08/2008 | CA2348434C A screen for use in a shale shaker |
| 01/06/2008 | CA2551786A1 Method and apparatus for disposing of cuttings when drilling a well |
| 01/03/2008 | WO2005052302A3 Actuating mechanism |
| 01/03/2008 | US20080004190 Multizone Stimulation Using Wax Balls |
| 01/03/2008 | US20080000697 Systems and Methods for Completing a Multiple Zone Well |
| 01/03/2008 | US20080000696 Downhole swivel joint |
| 01/02/2008 | EP1725737B1 Drilling head with protective screen |
| 01/02/2008 | CN200999597Y Petroleum vibrating screen mesh |
| 01/02/2008 | CN101099025A Arrangement for sucking dust |
| 01/02/2008 | CN101096906A Cement through side pocket mandrel |
| 01/01/2008 | US7314082 Methods of improving well bore pressure containment integrity |
| 12/29/2007 | CA2591737A1 Effervescent biocide compositions for oilfield applications |
| 12/27/2007 | US20070295501 Method and System for Production Metering of Oil Wells |
| 12/26/2007 | EP1870558A2 Top drive swivel apparatus and method |
| 12/26/2007 | EP1869284A1 Pumping system |
| 12/26/2007 | EP1869283A1 Apparatus and method for recovering oil-based drilling mud |
| 12/26/2007 | EP1131615B1 Method and system for extracting, analysing and measuring constituents transported by a bore fluid |
| 12/26/2007 | CN200997736Y Cable shelter of mud solid monitoring system |
| 12/26/2007 | CN200996274Y Current-limiting filter of drilling bit |
| 12/26/2007 | CN101094966A Elevator for use in handling pipe and method for handling pipe |
| 12/26/2007 | CN101094965A Apparatus and method for guiding pipe |
| 12/26/2007 | CN101092869A Inverse circular sand washing adapter connector in rotary type of twin pipe |
| 12/25/2007 | US7313481 Methods and devices for analyzing and controlling the propagation of waves in a borehole generated by water hammer |
| 12/25/2007 | US7311158 Silicate-containing additives for well bore treatments and associated methods |
| 12/25/2007 | US7311153 Flow-biased sequencing valve |
| 12/25/2007 | US7311151 Substantially neutrally buoyant and positively buoyant electrically heated flowlines for production of subsea hydrocarbons |
| 12/25/2007 | US7311150 Method and system for cleaning a well bore |
| 12/25/2007 | US7311148 Methods and apparatus for wellbore construction and completion |
| 12/25/2007 | US7311147 Methods of improving well bore pressure containment integrity |
| 12/25/2007 | US7311145 Re-use of recovered treating fluid |
| 12/21/2007 | WO2007144597A1 Top filling tubing |
| 12/21/2007 | WO2007144157A1 Methods and apparatus for wireline drilling on coiled tubing |
| 12/21/2007 | WO2007143773A1 Microtunnelling system and apparatus |
| 12/21/2007 | CA2657463A1 Top filling tubing |
| 12/21/2007 | CA2655245A1 Methods and apparatus for wireline drilling on coiled tubing |
| 12/21/2007 | CA2649801A1 Microtunnelling system and apparatus |
| 12/20/2007 | US20070289746 Arrangement and method for controlling and regulating bottom hole pressure when drilling deepwater offshore wells |
| 12/19/2007 | EP1867832A1 Choke valve for fluid injection in geological formations |
| 12/19/2007 | EP1867831A1 Methods and apparatus for wireline drilling on coiled tubing |
| 12/19/2007 | EP1866516A1 Invert emulsion based completion and displacement fluid and method of use |
| 12/19/2007 | EP1866515A1 Water based completion and displacement fluid and method of use |
| 12/19/2007 | EP1866048A1 Sieve apparatus and method for use of same |
| 12/19/2007 | CN200992969Y Wheel type slurry filter |
| 12/19/2007 | CN200992968Y Cement additive large-sized mixing device |
| 12/18/2007 | US7308954 Rotating diverter head |
| 12/18/2007 | US7308952 Underbalanced drilling method and apparatus |
| 12/18/2007 | US7308941 Apparatus and methods for measurement of solids in a wellbore |