| Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780) |
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| 08/21/2007 | CA2312341C Percussive tool |
| 08/16/2007 | WO2007091055A1 Selectively activated float equipment |
| 08/16/2007 | US20070187151 Pumping system for injecting a mixture of liquids via a well into a subterranean formation |
| 08/16/2007 | US20070187099 Methods and Compositions for Sealing Fractures, Voids, and Pores of Subterranean Rock Formations |
| 08/16/2007 | CA2734546A1 Managed pressure and/or temperature drilling system and method |
| 08/15/2007 | EP1817481A2 Downhole swivel apparatus and method |
| 08/15/2007 | EP1817478A1 Elevator for use in handling pipe and method for handling pipe |
| 08/15/2007 | EP1817477A1 Apparatus and method for guiding pipe |
| 08/15/2007 | CN2935099Y Injection flowmeter of steam pipeline |
| 08/15/2007 | CN2934554Y Water well operation vehicle |
| 08/15/2007 | CN101018925A Top drive |
| 08/15/2007 | CN101016828A Foam negative pressure mixed discharging plug removal method |
| 08/14/2007 | US7255173 Instrumentation for a downhole deployment valve |
| 08/14/2007 | CA2456812C Pressure pulse generator for downhole tool |
| 08/14/2007 | CA2398225C Method for reducing borehole erosion in shale formations |
| 08/14/2007 | CA2273568C A method of installing a casing in a well and apparatus therefor |
| 08/09/2007 | US20070183853 System tank and output unit for transporting untreated drill cuttings |
| 08/09/2007 | US20070181346 Drill-string connector |
| 08/09/2007 | US20070181345 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 08/09/2007 | US20070181344 Drilling head with protective screen |
| 08/09/2007 | US20070181313 Downhole tool |
| 08/08/2007 | EP1815104A1 Actuating mechanism |
| 08/08/2007 | CN2931761Y Oil field boring fluid shale shaker |
| 08/08/2007 | CN2931760Y Inside and outside unifies ring shaped pipe line device |
| 08/08/2007 | CN1330845C Drilling method and tools and the use thereof |
| 08/08/2007 | CN1330844C Drill head steering controll method |
| 08/07/2007 | US7252162 Method and device for injecting a fluid into a formation |
| 08/07/2007 | US7252161 Method and apparatus with slips assembly for coupling tubulars without interruption of circulation |
| 08/07/2007 | US7252151 Drilling method |
| 08/07/2007 | CA2456797C Deformable blades for downhole applications in a wellbore |
| 08/07/2007 | CA2344627C Method of dynamically controlling bottom hole circulating pressure in a wellbore |
| 08/07/2007 | CA2292663C Valve for use in a wellbore |
| 08/07/2007 | CA2290895C Method and apparatus for well logging and well control |
| 08/02/2007 | WO2007087595A1 Method of processing drilling fluid |
| 08/02/2007 | WO2007086004A1 Method of treating a subterranean formation using a rheology model for fluid optimization |
| 08/02/2007 | WO2007085813A1 Method for processing drilling cuttings in an oil recovery operation |
| 08/02/2007 | US20070175667 Method for processing drilling cuttings in an oil recovery operation |
| 08/02/2007 | CA2640125A1 Method of treating a subterranean formation using a rheology model for fluid optimization |
| 08/02/2007 | CA2637680A1 Method of processing drilling fluid |
| 08/01/2007 | EP1694941B1 Device for removal and filtration of drilling fluid |
| 08/01/2007 | CN1329622C A method and device by a displacement tool |
| 08/01/2007 | CN1329619C System and method to reduce hydrostatic pressure in risers using buoyant spheres |
| 07/31/2007 | US7249632 Top drive swivel apparatus and method |
| 07/31/2007 | CA2534697A1 Portable degasser, flare tank and fluid storage system |
| 07/31/2007 | CA2300556C Under-balanced drilling separation apparatus and methods |
| 07/26/2007 | WO2007083192A1 Wellbore system and method using a flow-actuated diverter valve |
| 07/26/2007 | WO2007060449A3 Downhole tool |
| 07/26/2007 | US20070169936 slurry of cement, water and super-absorbent polymer which absorbs free water in slurry to form gel ore when placed in well, and which releases absorbed water to cement hydration reaction as cement sets; poly(2-propenamide-co-2-propenoic acid sodium salt), polyacrylamide, modified crosslinked polyacrylate |
| 07/26/2007 | DE102006003769A1 Clearing and removing drilling material from a horizontal bore involves using flow of flushing material that loosens and transports drilling material produced by supplying gaseous medium released at one or more points in bore |
| 07/26/2007 | CA2534746A1 Drill cuttings treatment system |
| 07/25/2007 | CN2926484Y Safety under-well short joint for air drilling well |
| 07/24/2007 | US7246665 Providing a settable formulation that comprisesmagnesium oxide, andbrine that comprises water and a divalent salt, wherein the divalent salt does not contain magnesium ;placing the settable formulation in a subterranean formation; allowing to to set to form the hardened mass |
| 07/18/2007 | EP1808569A2 Underbalanced well drilling and production |
| 07/18/2007 | EP1537291B1 Drilling method |
| 07/18/2007 | CN2923985Y Drilling dust-removing apparatus |
| 07/17/2007 | US7244363 Providing a heavy halide brine, adding a permanganate to the heavy halide brine to oxidize the water-soluble ions;allowing a water-insoluble compound to form; andremoving the water insoluble compound from the heavy halide brine |
| 07/17/2007 | US7243743 Drilling assembly and method for drilling a barehole into geological formations |
| 07/17/2007 | US7243742 Drill pipe screen |
| 07/17/2007 | US7243741 Separation of evolved gases from drilling fluids in a drilling operation |
| 07/17/2007 | US7243740 Filter assembly having a bypass passageway and method |
| 07/17/2007 | US7243738 Multi seam coal bed/methane dewatering and depressurizing production system |
| 07/17/2007 | US7243736 Method of controlling a well experiencing gas kicks |
| 07/17/2007 | US7243537 Methods for measuring a formation supercharge pressure |
| 07/17/2007 | CA2300555C Under-balanced drilling separation apparatus and methods |
| 07/17/2007 | CA2259852C Wireless coiled tubing joint locator |
| 07/12/2007 | WO2007060214A3 Method and apparatus for processing and injecting drill cuttings |
| 07/12/2007 | US20070158111 Method and apparatus for directional drilling |
| 07/12/2007 | US20070158070 Consolidation agents and the use thereof for consolidating molded bodies and geological formations consisting of porous or particulate materials |
| 07/12/2007 | US20070158069 Method for drilling and casing a wellbore with a pump down cement float |
| 07/11/2007 | EP1805390A2 Modular pressure control and drilling waste management apparatus for subterranean borehole operations |
| 07/11/2007 | CN2921260Y Drilling fluid two-stage degassing unit |
| 07/11/2007 | CN1997807A Systems and methods for remotely determining and changing cutting modes during decoking |
| 07/11/2007 | CN1995691A Low-pressure drilling technology using double-wall drill pipe |
| 07/10/2007 | US7240733 Pressure-actuated perforation with automatic fluid circulation for immediate production and removal of debris |
| 07/10/2007 | CA2442963C Flow control apparatus for use in a wellbore |
| 07/10/2007 | CA2362209C Drilling method |
| 07/05/2007 | US20070151763 Drilling system and method |
| 07/05/2007 | US20070151737 Flushing device |
| 07/04/2007 | EP1257724B1 Apparatus and method relating to tongs, continuous circulation and to safety slips |
| 07/04/2007 | CN2918723Y Water-resistant well washing switch |
| 07/04/2007 | CN2918717Y Liquid level and vacuum degree automatic control device |
| 07/03/2007 | US7238648 Viscoelastic surfactant fluids and related methods of use |
| 07/03/2007 | US7237623 Method for pressurized mud cap and reverse circulation drilling from a floating drilling rig using a sealed marine riser |
| 07/03/2007 | US7237613 Underbalanced marine drilling riser |
| 07/03/2007 | US7237611 Zero drill completion and production system |
| 07/03/2007 | CA2463289C Cementing system for wellbores |
| 07/03/2007 | CA2322484C Method for removal of cuttings from a deviated wellbore drilled with coiled tubing |
| 06/28/2007 | US20070144785 Separating mixtures of oil and water |
| 06/28/2007 | US20070144742 Method of generating stable foam for oil and gas well cleanouts |
| 06/28/2007 | DE102005060549A1 Ethercarbonsäuren als Additive zur Verbesserung der Schmierwirkung von wasserbasierten Bohrspülungen Ether carboxylic acids as additives for improving the lubricity of water-based drilling fluids |
| 06/27/2007 | EP1799956A1 Device for extracting at least one gas contained in a drilling mud and associated analysis assembly |
| 06/27/2007 | EP1632640A9 Method and apparatus for filling a drill string with a drilling fluid |
| 06/27/2007 | EP1563162B1 Drilling fluid circulation system and method |
| 06/27/2007 | CN1989218A Under-neutralized alkylxylene sulfonic acid composition for enhanced oil recovery processes |
| 06/26/2007 | US7234545 Self-blocking safety device |
| 06/26/2007 | US7234542 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 06/26/2007 | US7234538 Method for sinking a borehole in the ground and wet boring tool |
| 06/26/2007 | US7234529 Flow switchable check valve and method |
| 06/26/2007 | US7234522 Apparatus and method for drilling a wellbore with casing and cementing the casing in the wellbore |
| 06/26/2007 | CA2271795C Whipstock |