Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129)
12/2007
12/25/2007US7311153 Flow-biased sequencing valve
12/25/2007US7311141 Casing scraper
12/19/2007CN200993003Y Water injection well testing steel wire protector
12/19/2007CN200992988Y Oil well forced-discharge negative-pressure blockage removing tool
12/18/2007US7308940 Flexible wellbore broach
12/18/2007CA2386314C Asphaltenes monitoring and control system
12/18/2007CA2334782C Method for preventing deposits in oil extraction
12/13/2007WO2007143324A1 Epoxy secured stop collar for centralizer
12/13/2007US20070284100 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
12/12/2007CN200989191Y Casing connection vessel
12/11/2007US7306038 Well cleaning method and apparatus using detonating cord having additional reliability and a longer shelf life
12/11/2007US7306037 Reducing number and prevent migration of particles; preflushing with aqueous solution containing surfactant; noncatalytic reaction
12/11/2007CA2492286C Running a completion assembly without killing a well
12/06/2007WO2007140157A1 Energized fluid for generating self-cleaning filter cake
12/06/2007US20070277970 Apparatus For Wiping The Interior Of Pipes
12/05/2007EP1861579A2 Method and composition for forming protective precipitate on cement surfaces prior to formation acidizing treatment
12/05/2007CN101082001A Aloe derived scale inhibitor
12/04/2007CA2571670C Downhole surge pressure reduction and filtering apparatus
12/04/2007CA2380245C Down hole casing string cleaning device
12/04/2007CA2296054C Computer controlled injection wells
11/2007
11/28/2007EP1859125A1 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
11/27/2007US7299885 Downhole drill string having a collapsible subassembly and method of loosening a stuck drillstring
11/27/2007CA2524554C Electrical energy from a wellbore light cell
11/27/2007CA2460712C Pass through valve and stab tool
11/27/2007CA2264632C Wellbores utilizing fiber optic-based sensors and operating devices
11/22/2007WO2007133558A2 Robust expression of a bioactive mammalian protein in chlamydomonas chloroplast
11/22/2007US20070267193 Stimulating Oilfields Using Different Scale-Inhibitors
11/21/2007CN200978632Y Short pitch teeth-type centralizing device
11/20/2007US7297823 Additives for inhibiting the formation of gas hydrates
11/20/2007US7296627 Method for simultaneous removal of asphaltene, and/or paraffin and scale from producing oil wells
11/20/2007US7296625 Methods of forming packs in a plurality of perforations in a casing of a wellbore
11/15/2007WO2007128425A1 Borehole cleaning using downhole pumps
11/15/2007WO2002079604A3 Expandable downhole tool
11/15/2007US20070261855 Wellbore cleaning tool system and method of use
11/15/2007CA2650793A1 Borehole cleaning using downhole pumps
11/15/2007CA2650334A1 Compositions and methods for removal of asphaltenes from a portion of a wellbore or subterranean formation
11/14/2007CN200975233Y Down-hole slow corroding antisludging equipment for oil gas field
11/08/2007US20070256839 Apparatus and method for washing tubular conduits during trip out of a conduit string from within a subterranean well
11/08/2007US20070256828 Method and apparatus for reducing a skin effect in a downhole environment
11/07/2007EP1852571A1 Borehole cleaning using downhole pumps
11/07/2007CN200971770Y Magnetic thermal wax-proof device for oil production
11/07/2007CN100347401C Wellhead drip medicament charging method by using water pressure to retain constant medicament charging differential pressure
11/06/2007US7290617 Running a completion assembly without killing a well
11/06/2007US7290615 Fluid having recyclable viscosity
11/01/2007US20070254816 Method for Controlled Placement of Chemicals and Composition Useful for Practicing Same
11/01/2007US20070251693 Compositions and methods for delivering an organic solvent to a downhole portion of a wellbore or to a portion of a pipeline
10/2007
10/31/2007CN200968201Y Canula oil extractor
10/30/2007US7287589 Well treatment system and method
10/25/2007US20070246426 Water Flooding Method
10/25/2007US20070246217 Downhole Swivel Joint Assembly and Method of Using Said Swivel Joint Assembly
10/24/2007CN200964831Y Solid wax-preventing device capable of being thrown and salvaged
10/24/2007CN200964830Y Self-floating type oil scraper for oil pipe and drill pipe
10/23/2007US7284612 Controlling transient pressure conditions in a wellbore
10/23/2007CA2271620C Downhole magnetic debris collector
10/17/2007CN100343479C Method and compositions for inhibiting formation of hydrocarbon hydrates
10/17/2007CN100343478C High-temperature high-pressure combustion system of sub-critical composite heat carrier generator
10/11/2007WO2007113477A1 Wellbore cleaning
10/11/2007CA2647494A1 Wellbore cleaning
10/10/2007EP1841946A1 Method and system for cleaning a well bore
10/10/2007CN200958388Y Arbitrary-layer chemical feeder
10/09/2007US7278488 Method of generating stable foam for oil and gas well cleanouts
10/04/2007CA2645828A1 Composition and method for producing a pumpable hydrocarbon hydrate slurry at high water-cut
10/03/2007CN200955379Y Portable oil-production well-head chemical-adding device
10/02/2007CA2298952C Casing scraper
09/2007
09/30/2007CA2582275A1 Self-cleaning well control fluid
09/27/2007WO2007108692A1 Washing tool and method for cleaning wells and onshore/offshore boring equipment
09/27/2007WO2007107502A1 Additive for preserving the fluidity of fluids containing gas hydrates
09/27/2007CA2646737A1 Additive for preserving the fluidity of fluids containing gas hydrates
09/26/2007CN200952368Y Water injection well stainless steel seepage type removable stain and pollutant removing back flushing fine filter
09/25/2007US7273108 Apparatus to allow a coiled tubing tractor to traverse a horizontal wellbore
09/25/2007CA2492354C Flow control valve
09/20/2007WO2007106421A1 Hydrocarbon recovery techniques
09/20/2007WO2006012731A3 Integrated magnetic ranging tool
09/20/2007US20070215357 Methods and apparatus for production of hydrocarbons
09/19/2007CN200949451Y Multifunctional centering paraffin scraper fluid increasing device
09/18/2007US7270181 Downhole surge pressure reduction and filtering apparatus
09/18/2007US7270180 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
09/18/2007US7270179 Method for stimulation of liquid flow in a well
09/11/2007CA2426258C An apparatus for retrieving metal debris from a well bore
09/06/2007US20070204997 Process for Disruption of Filter Cakes
09/05/2007CN200943472Y Overflow recovery device for oil well operation
09/05/2007CN200943468Y Oiling contaminant scraper of oil pumping polish rod
09/05/2007CN200943467Y Movable paraffin scraper
09/04/2007US7264056 System and method for the mitigation of paraffin wax deposition from crude oil by using ultrasonic waves
08/2007
08/29/2007EP1824804A2 Ion pair amphiphiles as hydrate inhibitors
08/29/2007EP1511915B1 Method and material for scale inhibition in oil wells
08/28/2007CA2354452C Novel fluids and techniques for maximizing fracture fluid clean-up
08/28/2007CA2201512C Alginate gels
08/23/2007WO2007093771A1 Downhole assembly and cutter assembly
08/23/2007WO2007093761A1 Methods of cleaning sand control screens and gravel packs
08/23/2007US20070193737 Method of intensification of natural gas production from coal beds
08/23/2007CA2641391A1 Downhole assembly and cutter assembly
08/22/2007CN2937446Y Spacing rotation centering wax scraper
08/22/2007CN101023242A Scale inhibition method
08/21/2007US7258170 Methods for remediating subterranean formations
08/21/2007CA2429396C Bi-directional traction apparatus
08/16/2007US20070187090 Methods of cleaning sand control screens and gravel packs
08/15/2007CN101016831A Online wax removal technique for petroleum single well pipeline and device thereof
08/14/2007US7255164 Casing brush assembly
08/14/2007CA2526837C Downhole surge pressure reduction and filtering apparatus
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