| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 12/25/2007 | US7311153 Flow-biased sequencing valve |
| 12/25/2007 | US7311141 Casing scraper |
| 12/19/2007 | CN200993003Y Water injection well testing steel wire protector |
| 12/19/2007 | CN200992988Y Oil well forced-discharge negative-pressure blockage removing tool |
| 12/18/2007 | US7308940 Flexible wellbore broach |
| 12/18/2007 | CA2386314C Asphaltenes monitoring and control system |
| 12/18/2007 | CA2334782C Method for preventing deposits in oil extraction |
| 12/13/2007 | WO2007143324A1 Epoxy secured stop collar for centralizer |
| 12/13/2007 | US20070284100 Injecting a dispersion of seed particles of insoluble sulfates of barium, calcium in an aqueous medium into a hydrocarbon gas well; equivalent spherical diameter most preferably 100% less than 25 nm; percolating; controlled precipitation onto the seed particles, not the walls;antiscaling agents |
| 12/12/2007 | CN200989191Y Casing connection vessel |
| 12/11/2007 | US7306038 Well cleaning method and apparatus using detonating cord having additional reliability and a longer shelf life |
| 12/11/2007 | US7306037 Reducing number and prevent migration of particles; preflushing with aqueous solution containing surfactant; noncatalytic reaction |
| 12/11/2007 | CA2492286C Running a completion assembly without killing a well |
| 12/06/2007 | WO2007140157A1 Energized fluid for generating self-cleaning filter cake |
| 12/06/2007 | US20070277970 Apparatus For Wiping The Interior Of Pipes |
| 12/05/2007 | EP1861579A2 Method and composition for forming protective precipitate on cement surfaces prior to formation acidizing treatment |
| 12/05/2007 | CN101082001A Aloe derived scale inhibitor |
| 12/04/2007 | CA2571670C Downhole surge pressure reduction and filtering apparatus |
| 12/04/2007 | CA2380245C Down hole casing string cleaning device |
| 12/04/2007 | CA2296054C Computer controlled injection wells |
| 11/28/2007 | EP1859125A1 Use of water-soluble alkane sulfonic acids for increasing the permeability of underground petroliferous and/or gas-bearing carbonate rock formations and for dissolving carbonate contaminants and/or contaminants containing carbonates during petroleum production |
| 11/27/2007 | US7299885 Downhole drill string having a collapsible subassembly and method of loosening a stuck drillstring |
| 11/27/2007 | CA2524554C Electrical energy from a wellbore light cell |
| 11/27/2007 | CA2460712C Pass through valve and stab tool |
| 11/27/2007 | CA2264632C Wellbores utilizing fiber optic-based sensors and operating devices |
| 11/22/2007 | WO2007133558A2 Robust expression of a bioactive mammalian protein in chlamydomonas chloroplast |
| 11/22/2007 | US20070267193 Stimulating Oilfields Using Different Scale-Inhibitors |
| 11/21/2007 | CN200978632Y Short pitch teeth-type centralizing device |
| 11/20/2007 | US7297823 Additives for inhibiting the formation of gas hydrates |
| 11/20/2007 | US7296627 Method for simultaneous removal of asphaltene, and/or paraffin and scale from producing oil wells |
| 11/20/2007 | US7296625 Methods of forming packs in a plurality of perforations in a casing of a wellbore |
| 11/15/2007 | WO2007128425A1 Borehole cleaning using downhole pumps |
| 11/15/2007 | WO2002079604A3 Expandable downhole tool |
| 11/15/2007 | US20070261855 Wellbore cleaning tool system and method of use |
| 11/15/2007 | CA2650793A1 Borehole cleaning using downhole pumps |
| 11/15/2007 | CA2650334A1 Compositions and methods for removal of asphaltenes from a portion of a wellbore or subterranean formation |
| 11/14/2007 | CN200975233Y Down-hole slow corroding antisludging equipment for oil gas field |
| 11/08/2007 | US20070256839 Apparatus and method for washing tubular conduits during trip out of a conduit string from within a subterranean well |
| 11/08/2007 | US20070256828 Method and apparatus for reducing a skin effect in a downhole environment |
| 11/07/2007 | EP1852571A1 Borehole cleaning using downhole pumps |
| 11/07/2007 | CN200971770Y Magnetic thermal wax-proof device for oil production |
| 11/07/2007 | CN100347401C Wellhead drip medicament charging method by using water pressure to retain constant medicament charging differential pressure |
| 11/06/2007 | US7290617 Running a completion assembly without killing a well |
| 11/06/2007 | US7290615 Fluid having recyclable viscosity |
| 11/01/2007 | US20070254816 Method for Controlled Placement of Chemicals and Composition Useful for Practicing Same |
| 11/01/2007 | US20070251693 Compositions and methods for delivering an organic solvent to a downhole portion of a wellbore or to a portion of a pipeline |
| 10/31/2007 | CN200968201Y Canula oil extractor |
| 10/30/2007 | US7287589 Well treatment system and method |
| 10/25/2007 | US20070246426 Water Flooding Method |
| 10/25/2007 | US20070246217 Downhole Swivel Joint Assembly and Method of Using Said Swivel Joint Assembly |
| 10/24/2007 | CN200964831Y Solid wax-preventing device capable of being thrown and salvaged |
| 10/24/2007 | CN200964830Y Self-floating type oil scraper for oil pipe and drill pipe |
| 10/23/2007 | US7284612 Controlling transient pressure conditions in a wellbore |
| 10/23/2007 | CA2271620C Downhole magnetic debris collector |
| 10/17/2007 | CN100343479C Method and compositions for inhibiting formation of hydrocarbon hydrates |
| 10/17/2007 | CN100343478C High-temperature high-pressure combustion system of sub-critical composite heat carrier generator |
| 10/11/2007 | WO2007113477A1 Wellbore cleaning |
| 10/11/2007 | CA2647494A1 Wellbore cleaning |
| 10/10/2007 | EP1841946A1 Method and system for cleaning a well bore |
| 10/10/2007 | CN200958388Y Arbitrary-layer chemical feeder |
| 10/09/2007 | US7278488 Method of generating stable foam for oil and gas well cleanouts |
| 10/04/2007 | CA2645828A1 Composition and method for producing a pumpable hydrocarbon hydrate slurry at high water-cut |
| 10/03/2007 | CN200955379Y Portable oil-production well-head chemical-adding device |
| 10/02/2007 | CA2298952C Casing scraper |
| 09/30/2007 | CA2582275A1 Self-cleaning well control fluid |
| 09/27/2007 | WO2007108692A1 Washing tool and method for cleaning wells and onshore/offshore boring equipment |
| 09/27/2007 | WO2007107502A1 Additive for preserving the fluidity of fluids containing gas hydrates |
| 09/27/2007 | CA2646737A1 Additive for preserving the fluidity of fluids containing gas hydrates |
| 09/26/2007 | CN200952368Y Water injection well stainless steel seepage type removable stain and pollutant removing back flushing fine filter |
| 09/25/2007 | US7273108 Apparatus to allow a coiled tubing tractor to traverse a horizontal wellbore |
| 09/25/2007 | CA2492354C Flow control valve |
| 09/20/2007 | WO2007106421A1 Hydrocarbon recovery techniques |
| 09/20/2007 | WO2006012731A3 Integrated magnetic ranging tool |
| 09/20/2007 | US20070215357 Methods and apparatus for production of hydrocarbons |
| 09/19/2007 | CN200949451Y Multifunctional centering paraffin scraper fluid increasing device |
| 09/18/2007 | US7270181 Downhole surge pressure reduction and filtering apparatus |
| 09/18/2007 | US7270180 Controlling inorganic scale of zinc sulfide or iron sulfide in a subterranean formation or wellbore, by pumping downhole a copolymer comprising a quaternary ammonium salt and an acrylamide unit; well completion; copolymer of acrylamide and diallyldimethylammonium salt and possibly acrylic acid or salt |
| 09/18/2007 | US7270179 Method for stimulation of liquid flow in a well |
| 09/11/2007 | CA2426258C An apparatus for retrieving metal debris from a well bore |
| 09/06/2007 | US20070204997 Process for Disruption of Filter Cakes |
| 09/05/2007 | CN200943472Y Overflow recovery device for oil well operation |
| 09/05/2007 | CN200943468Y Oiling contaminant scraper of oil pumping polish rod |
| 09/05/2007 | CN200943467Y Movable paraffin scraper |
| 09/04/2007 | US7264056 System and method for the mitigation of paraffin wax deposition from crude oil by using ultrasonic waves |
| 08/29/2007 | EP1824804A2 Ion pair amphiphiles as hydrate inhibitors |
| 08/29/2007 | EP1511915B1 Method and material for scale inhibition in oil wells |
| 08/28/2007 | CA2354452C Novel fluids and techniques for maximizing fracture fluid clean-up |
| 08/28/2007 | CA2201512C Alginate gels |
| 08/23/2007 | WO2007093771A1 Downhole assembly and cutter assembly |
| 08/23/2007 | WO2007093761A1 Methods of cleaning sand control screens and gravel packs |
| 08/23/2007 | US20070193737 Method of intensification of natural gas production from coal beds |
| 08/23/2007 | CA2641391A1 Downhole assembly and cutter assembly |
| 08/22/2007 | CN2937446Y Spacing rotation centering wax scraper |
| 08/22/2007 | CN101023242A Scale inhibition method |
| 08/21/2007 | US7258170 Methods for remediating subterranean formations |
| 08/21/2007 | CA2429396C Bi-directional traction apparatus |
| 08/16/2007 | US20070187090 Methods of cleaning sand control screens and gravel packs |
| 08/15/2007 | CN101016831A Online wax removal technique for petroleum single well pipeline and device thereof |
| 08/14/2007 | US7255164 Casing brush assembly |
| 08/14/2007 | CA2526837C Downhole surge pressure reduction and filtering apparatus |