Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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01/21/2009 | CN101351616A Wellbore intervention tool |
01/20/2009 | CA2473496C Bi-directional thruster pig apparatus and method of utilizing same |
01/15/2009 | US20090014182 Drill pipe wiper system and associated method |
01/15/2009 | US20090014167 Dual Point Adjustable Depth Air Sparging Well System |
01/15/2009 | CA2692607A1 Multi-purpose well servicing apparatus |
01/14/2009 | CN201180528Y Liquid preparation continuous instilment apparatus with automatic casing pressure control |
01/14/2009 | CN201180527Y Descaling apparatus for inner wall of oil pipe |
01/14/2009 | CN201180526Y Sand shovel for horizontal well sand pumping pump |
01/14/2009 | CN201180525Y Apparatus used for oil well horizontal sand pumping |
01/14/2009 | CN201180524Y System used for oil well horizontal sand pumping |
01/14/2009 | CN201180523Y System used for oil well sand pumping |
01/14/2009 | CN201180522Y Apparatus used for horizontal well sand pumping |
01/14/2009 | CN201180521Y System used for horizontal well sand pumping |
01/14/2009 | CN201180520Y Apparatus used for oil well sand pumping |
01/14/2009 | CN201180519Y Down-hole stock solution solar heating and paraffin removal apparatus |
01/14/2009 | CN201179515Y Integrated oil production apparatus cleaning machine |
01/13/2009 | US7475730 Annular surface between the tubing and casing of an oil or gas well is contacted with a foamed well treatment containing a gas, a foaming agent and a liquid well treatment agent, such as a scale inhibitor, corrosion inhibitor, salt inhibitor, scale remover or biocide; destabilizing, coating |
01/13/2009 | CA2479562C Downhole oilfield erosion protection by using diamond |
12/31/2008 | WO2009002185A1 Magnet fixing device in a cleaning tool |
12/31/2008 | WO2009001253A1 Providing a cleaning tool having a coiled tubing and an electrical pump assembly for cleaning a well |
12/31/2008 | EP1135353B1 A method for preventing or retarding the formation of gas hydrates |
12/31/2008 | CN201173108Y Oil well down-hole liquid continuous medicament-adding device |
12/31/2008 | CN201173107Y Wellhead continuous medicament-adding device |
12/31/2008 | CN201173102Y Acoustic wave viscosity reduction oil well wax-proof device |
12/31/2008 | CA2689577A1 Providing a cleaning tool having a coiled tubing and an electrical pump assembly for cleaning a well |
12/30/2008 | CA2543408C Method for providing a temporary barrier in a flow pathway |
12/30/2008 | CA2540988C Improved fracturing fluid and method of use |
12/24/2008 | WO2008129160A3 Processing fluid for wells bored with oil-based muds in the form of a delayed effect water-in-oil emulsion |
12/24/2008 | CN201168660Y Dosing atomizer |
12/24/2008 | CN101328796A Environment protection type wax-proof anti-scaling viscosity reduction machine |
12/23/2008 | US7468469 Dissolved oxygen releasing compound |
12/23/2008 | US7467671 Drill bit with protection member |
12/23/2008 | CA2525065C Wellbores utilizing fiber optic-based sensors and operating devices |
12/18/2008 | WO2008152419A1 Well treatment |
12/18/2008 | WO2008151447A1 Well service compositions for consolidation of particulates in subterranean coal seams |
12/18/2008 | US20080308269 Washing a Cylindrical Cavity |
12/18/2008 | CA2690253A1 Well service compositions for consolidation of particulates in subterranean coal seams |
12/18/2008 | CA2690178A1 Well treatment |
12/17/2008 | EP1540129B1 Downhole drill string having a collapsible subassembly |
12/17/2008 | CN101324181A Integral locking-proof oil dragging pump |
12/16/2008 | US7464760 Inhibiting reservoir souring using a treated injection water |
12/11/2008 | WO2007143489A3 Composition for inhibiting formation of gas hydrates |
12/11/2008 | US20080302522 System For Cyclic Injection and Production From a Well |
12/10/2008 | EP1999338A1 Wellbore cleaning |
12/10/2008 | CN201162508Y Sizing scraper |
12/09/2008 | US7461699 Method for providing a temporary barrier in a flow pathway |
12/04/2008 | US20080296024 Procedures and Compositions for Reservoir Protection |
12/03/2008 | EP1996669A1 Additive for preserving the fluidity of fluids containing gas hydrates |
12/03/2008 | CN201159148Y Sand pump of horizontal well |
12/03/2008 | CN201159078Y Oil field multi-magnetic field constant temperature energy-saving electromagnetic paraffin removal-proof device |
12/03/2008 | CN201159067Y Pipeline pickling device of water injection well |
11/27/2008 | US20080289827 Viscosified fluids for remediating subterranean damage |
11/26/2008 | EP1994258A1 Hydrocarbon recovery techniques |
11/26/2008 | EP1859125B1 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 |
11/25/2008 | US7455113 Downhole impeller device |
11/25/2008 | US7455111 Water in oil emulsion and organophosphate dispersant increase permeability; unwanted particles deposited in the formation are dissolved or loosened by the outer phase of the water-in-oil emulsion; displacement of oil base drilling muds; removal of asphaltenes, paraffins, scale, heavy crude, and pipe dope |
11/25/2008 | US7455109 Water flooding method |
11/20/2008 | WO2007111789A3 Composition and method for producing a pumpable hydrocarbon hydrate slurry at high water-cut |
11/18/2008 | US7451823 Well chemical treatment utilizing plunger lift delivery system with chemically improved plunger seal |
11/18/2008 | US7451819 Openhole perforating |
11/12/2008 | CN201148843Y Releasing type water block pipe pillar capable of heat washing to protect oil layer |
11/05/2008 | CN201144670Y Highly effective scaling tool for sleeve |
11/05/2008 | CN201144669Y Anti-revolved electric scraping device for down-hole oil pipe |
11/04/2008 | CA2344754C Coiled tubing wellbore cleanout |
11/02/2008 | CA2594213A1 Composition for denaturing and breaking down friction-reducing polymer and for destroying other gas and oil well contaminants |
10/30/2008 | WO2008024547A3 Well chemical treatment utilizing plunger lift delivery system with chemically improved plunger seal |
10/29/2008 | CN201141296Y Multifunctional negative pressure oil production plug-removing oil-adding device |
10/29/2008 | CN101294483A Self-washing wax-clearing method for electric heating oil well |
10/29/2008 | CN100429379C Stainless steel seepage scale removal blowdown backwash fine filter for flooding well |
10/23/2008 | US20080257541 Wellhead isolation tool including an abrasive cleaning ring |
10/22/2008 | CN201137480Y Oil well borehole chemical agent deposition slow releasing device |
10/22/2008 | CN201137466Y Helical type pumping rod anti-corrosive wear-resistant device |
10/21/2008 | US7438797 Method of controlling asphaltene precipitation in a fluid |
10/15/2008 | CN201133240Y Deep well block-proof swab |
10/09/2008 | WO2008073986A3 Improved downhole scraping and/or brushing tool and related methods |
10/09/2008 | US20080245523 Cleaning apparatus |
10/08/2008 | CN201129168Y Dirty depositing device |
10/08/2008 | CN101280675A Pumping rod wax scraping apparatus |
10/01/2008 | CN201125713Y Physical cleaner for oilfield water injection |
10/01/2008 | CN201125712Y Well drilling rocker inner scraper |
10/01/2008 | CN201125711Y Pumping rod oil wiper assembly |
10/01/2008 | CN201125710Y Full-automatic oil well self-heat power anti-wax viscosity reduction apparatus |
10/01/2008 | CN201125685Y Oil water transfer control device |
10/01/2008 | CN101275462A Horizontal well bailing system and method |
09/30/2008 | US7428921 Well treatment system and method |
09/30/2008 | CA2476787C Integrated magnetic ranging tool |
09/25/2008 | WO2008115866A2 Completion method for well cleanup and zone isolation |
09/24/2008 | CN201121510Y Paraffin removing overhauling car |
09/24/2008 | CN101270636A Oil well dirty-blocking device |
09/24/2008 | CN101269374A Mixture gas generating device for cleaning oil production equipment |
09/23/2008 | US7427584 Treating composition |
09/23/2008 | US7426963 Piggable flowline-riser system |
09/23/2008 | CA2481913C Apparatus and method for treating the borehole wall and expanding a screen |
09/23/2008 | CA2409277C Wellbores utilizing fiber optic-based sensors and operating devices |
09/18/2008 | US20080223580 Completion Method for Well Cleanup and Zone Isolation |
09/17/2008 | CN201116464Y Well-washing wax-cleaning automatic control device |
09/16/2008 | US7424916 Flameless hot oiler |
09/11/2008 | US20080217019 Coiled tubing wellbore cleanout |
09/10/2008 | CN101260793A Horizontal sand spade for oil well |
09/09/2008 | CA2355676C Removal of oil and chloride from oil contaminated material |