| Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780) |
|---|
| 05/28/2009 | US20090133883 Method for retrofitting a downhole drill string with a flow through subassembly and method for making same |
| 05/28/2009 | US20090133872 Flow back separators |
| 05/28/2009 | CA2705933A1 Wellbore fluid mixing system |
| 05/27/2009 | CN201246121Y Pressure relief valve |
| 05/27/2009 | CN201246101Y Well drill machine |
| 05/27/2009 | CN101440694A Casing tool capable of being pressed and circulated |
| 05/27/2009 | CN100491688C Chuck and water swivel integrated apparatus for full hydraulic driller for pumping, draining and discharging gas |
| 05/27/2009 | CA2644820A1 Glycerol based drilling fluids |
| 05/26/2009 | CA2578318C Methods of stabilizing drill fluids and drill cuttings, compositions and uses thereof |
| 05/26/2009 | CA2550981C Continuous circulation drilling method |
| 05/26/2009 | CA2311160C Method for drilling and completing a wellbore and a pump down cement float collar for use therein |
| 05/22/2009 | WO2009062726A1 Methods for cuttings removal for a wireline drilling tool |
| 05/21/2009 | US20090126936 Actuating mechanism |
| 05/21/2009 | US20090126933 Device and method for retrieving debris from a well |
| 05/21/2009 | US20090126924 Flush-by system |
| 05/21/2009 | CA2644385A1 Method and apparatus for measurement of formation fluid loss |
| 05/20/2009 | CN201241643Y Drilling platform foul solution recovering device |
| 05/20/2009 | CN201241642Y Drilling mud grouting apparatus with flowmeter |
| 05/20/2009 | CN100488647C Thermal process for treating hydrocarbon-contaminated drilling cuttings |
| 05/19/2009 | US7534743 Ecological compatibility, stability, performance; suspends weighting agent and/or drill cuttings when operational forces are reduced; no pressure spike upon resumed operations |
| 05/19/2009 | CA2481639C Improving reservoir communication by creating a local underbalance and using treatment fluid |
| 05/14/2009 | WO2009062041A2 Automated electrical stability meter |
| 05/14/2009 | DE112007001258T5 Doppelbohrgestänge mit verbessertem Verfahren für den Fliessweg und Vorrichtung Doppelbohrgestänge with improved method for the flow path and device |
| 05/14/2009 | CA2704677A1 Automated electrical stability meter |
| 05/13/2009 | EP2058381A1 Compositions for drilling fluids useful to provide flat temperature rheology to such fluids over a wide temperature range and drilling fluids containing such compositions |
| 05/13/2009 | EP2056973A1 A screen assembly for a vibratory separator |
| 05/13/2009 | EP1537292B1 Ball operated by-pass tool for use in drillstring |
| 05/13/2009 | CN201236650Y Slurry mixed tank |
| 05/13/2009 | CN201236649Y Closed flushing apparatus |
| 05/13/2009 | CN201236648Y Vertical oil pumping well flushing apparatus |
| 05/13/2009 | CN101432500A A fluid treatment system and method and use of same |
| 05/12/2009 | CA2573379C Wellbore flow control device |
| 05/12/2009 | CA2550798C A method for monitoring the health of a choke used in wellbore operations |
| 05/12/2009 | CA2447306C Packer fluid |
| 05/08/2009 | CA2644277A1 Flush-by system |
| 05/07/2009 | WO2009058706A2 Anchored riserless mud return systems |
| 05/07/2009 | WO2009056870A1 A method and apparatus for recovering drilling mud |
| 05/07/2009 | US20090114450 Controlled Variable Density Fluid for Wellbore Operations |
| 05/06/2009 | EP2054485A2 Compositions and methods for improving the productivity of hydrocarbon producing wells |
| 05/06/2009 | EP2054144A1 Process for mixing wellbore fluids |
| 05/06/2009 | CN201232530Y Well washing valve |
| 05/06/2009 | CN201232529Y Synthesis monitoring instrument for cement car |
| 05/06/2009 | CN101427002A Method of controlling operation of rock drilling rig, and rock drilling rig |
| 05/06/2009 | CN101424169A Ocean petroleum well drilling vertical tube pressure equilibrium method and ocean petroleum filling well drilling safety valve |
| 05/06/2009 | CN101424165A Borehole block-resistant drilling tool |
| 05/05/2009 | US7527103 Procedures and compositions for reservoir protection |
| 05/05/2009 | US7527097 Methods for using reversible phase oil-based drilling fluid |
| 04/30/2009 | WO2009055402A2 Tubing retrievable capillary bypass safety valve and capillary injection sleeve |
| 04/30/2009 | US20090107728 Drilling fluid recovery |
| 04/30/2009 | US20090107722 Morphible bit |
| 04/29/2009 | EP2053197A2 Rotating blow out preventer |
| 04/29/2009 | EP2052127A1 Method and apparatus for preparing drill cuttings for reinjection into a well |
| 04/29/2009 | EP2051945A1 Dewatering system |
| 04/29/2009 | CN201228529Y Well drilling waste liquid and rock debris processing arrangement while drilling |
| 04/29/2009 | CN201228528Y Filtrating protector for well washing |
| 04/29/2009 | CN101421484A Separator and process for removing solids from drilling liquids |
| 04/29/2009 | CN101421371A Methods of preparing hydrocarbon, water and organophilic clay emulsions and compositions thereof |
| 04/29/2009 | CN101418676A Slurry hole internal circulation deslagging method and device |
| 04/29/2009 | CN101418672A Method for using borehole block-resistant drilling tool |
| 04/28/2009 | US7523793 Drilling head with protective screen |
| 04/28/2009 | CA2445067C Method and apparatus for removing fluids from drill cuttings |
| 04/25/2009 | CA2641332A1 Stimulation method |
| 04/23/2009 | US20090101411 Low profile rotating control device |
| 04/23/2009 | CA2641238A1 Fluid drilling equipment |
| 04/22/2009 | EP2050924A2 Oilfield equipment |
| 04/22/2009 | CN201225107Y Sand filtering machine for controlling drill filling pile slurry sand percentage |
| 04/22/2009 | CN201225106Y Commutation jet flow sand washing machine |
| 04/21/2009 | US7520342 Recovery system |
| 04/21/2009 | US7520328 Completion apparatus and methods for use in hydrocarbon wells |
| 04/21/2009 | CA2523039C Subsurface measurement apparatus, system, and process for improved well drilling, control, and production |
| 04/19/2009 | CA2607094A1 Drilling fluids settling tank |
| 04/16/2009 | WO2009048783A2 Fluid distribution for a shaker |
| 04/16/2009 | WO2009048337A1 Means and method for mixing a particulate material and a liquid |
| 04/16/2009 | WO2006121699A3 Flow through subassembly for a downhole drill string and method for making same |
| 04/16/2009 | US20090095534 Treating tar sand or tar resident in well bore by contacting the tar sand with treatment fluid comprising an aqueous fluid and a styrene-acrylate polymer, the tar sand comprising tar and sand, and allowing styrene-acrylate polymers to interact with tar to separate tar from sand |
| 04/16/2009 | US20090095488 Apparatus and method for facilitating the connection of tubulars using a top drive |
| 04/16/2009 | CA2701834A1 Fluid distribution for a shaker |
| 04/15/2009 | CN201221314Y Light vehicle-mounted drill |
| 04/15/2009 | CN101408094A Combined sand-washing well repairing machine |
| 04/14/2009 | US7516803 Air injection collar |
| 04/14/2009 | CA2559467C Apparatus and methods for sealing voids in a subterranean formation |
| 04/09/2009 | WO2009046071A2 Screen clamp |
| 04/09/2009 | WO2009045661A2 Composition and method for the solidification of toxic or hazardous drilling and agricultural waste |
| 04/09/2009 | CA2701730A1 Screen clamp |
| 04/08/2009 | CN201218067Y Automatic drilling mud monitoring system |
| 04/08/2009 | CN201218066Y Down-hole decompression tool |
| 04/08/2009 | CN101403279A Well bottom booster pump and its supercharging method |
| 04/07/2009 | US7514011 System for separating solids from a fluid stream |
| 04/07/2009 | US7513310 Method and arrangement for performing drilling operations |
| 04/07/2009 | CA2445870C Automatic tubing filler |
| 04/02/2009 | WO2009042018A1 Variable position gas trap |
| 04/02/2009 | WO2009018173A3 Continuous flow drilling systems and methods |
| 04/02/2009 | CA2698618A1 Variable position gas trap |
| 04/01/2009 | EP2041477A1 Pipe string device for conveying a fluid from a well head to a vessel |
| 04/01/2009 | EP2041235A2 Compressible objects combined with a drilling fluid to form a variable density drilling mud |
| 04/01/2009 | EP1718839B1 System tank and output unit for transporting untreated drill cuttings |
| 04/01/2009 | CN201214994Y Drilling fluid manifold of deep-well drilling rig |
| 04/01/2009 | CN201214986Y Anti-pollution well washing oil extraction device |
| 04/01/2009 | CN101397894A Well drilling gas injection joint and use method thereof |
| 04/01/2009 | CN101397893A Dynamic shunt alarming device while drilling |