| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 05/06/2003 | US6557565 Perforated casings for cleaning and disinfecting water wells |
| 05/06/2003 | CA2055495C Device for delivering corrosion or deposition inhibiting agents into a well by means of an auxiliary delivery tube |
| 05/01/2003 | WO2003036020A1 A method and a device for a collecting screw |
| 05/01/2003 | WO2003035793A1 Drilling fluids |
| 04/24/2003 | WO2003033861A1 Method for servicing a production well and an insert pump for carrying out said method |
| 04/24/2003 | US20030075320 Non-cryogenic production of nitrogen for on-site injection in well clean out |
| 04/23/2003 | CN2546614Y Sucker rod |
| 04/17/2003 | WO2003031950A1 Real-time on-line sensing and control of mineral scale deposition from formation fluids |
| 04/17/2003 | WO2003031770A1 Tool for cleaning boreholes |
| 04/17/2003 | US20030071988 Real-time on-line sensing and control of mineral scale deposition from formation fluids |
| 04/16/2003 | EP1301576A2 Compositions for controlling scaling and completion fluids |
| 04/16/2003 | CN2545363Y Borehole flusher for oil production well |
| 04/16/2003 | CN2545362Y Slip sleeve type thermal sensor |
| 04/15/2003 | US6546581 Casing scraper |
| 04/08/2003 | US6544932 Additives for inhibiting gas hydrate formation |
| 04/03/2003 | WO2003012253A3 Method of controlling asphaltene precipitation in a fluid |
| 04/03/2003 | US20030062165 Consuming deposits using heat generated from reaction of alkali or alkaline earth metal and water; forming gel barrier with further reaction of active material with aluminum or scandium |
| 04/02/2003 | EP0764061B1 Method for removing alkaline earth metal scale |
| 04/02/2003 | CN2542825Y Formation protective device for downhole clean-out operation |
| 03/27/2003 | WO2003025339A1 Device for cleaning an inner pipe inserted into a gas or oil conveying boring |
| 03/27/2003 | US20030056957 Method for improving well quality |
| 03/27/2003 | US20030056955 Chemical injection control system and method for multiple wells |
| 03/27/2003 | US20030056954 Methods and apparatus for a subsea tie back |
| 03/27/2003 | US20030056811 Coiled tubing wellbore cleanout |
| 03/26/2003 | CN1405264A Composition for washing oil-gas well, pipeline, sleeve pipe, stratum and equipments and using method thereof |
| 03/19/2003 | EP1292758A1 Well maintenance equipment and procedure |
| 03/19/2003 | CN2540504Y Automatic well cleaning apparatus for oil well |
| 03/19/2003 | CN2540496Y Nylon paraffin cutting centralizer for sucker rod |
| 03/18/2003 | US6533035 Method and apparatus for stimulating well production |
| 03/11/2003 | US6531694 Wellbores utilizing fiber optic-based sensors and operating devices |
| 03/11/2003 | US6530429 Downhole cleaning tool with shear clutch |
| 03/04/2003 | US6527050 Method and apparatus for formation damage removal |
| 02/27/2003 | US20030037926 Method and apparatus for formation damage removal |
| 02/25/2003 | US6523615 Electropolishing method for oil field tubular goods and drill pipe |
| 02/25/2003 | US6523612 Method and apparatus for cleaning wellbore casing |
| 02/19/2003 | CN2536783Y Oil well wax remover |
| 02/18/2003 | US6520260 Well treatment tool and method of treating a well |
| 02/13/2003 | WO2003012253A2 Method of controlling asphaltene precipitation in a fluid |
| 01/30/2003 | WO2002055831A3 Improved method for stimulation of liquid flow in a well |
| 01/30/2003 | US20030019665 Reamer tool |
| 01/29/2003 | CN2533259Y Pollution-free washing device for oil well |
| 01/23/2003 | WO2003006787A1 Liner brushing and conditioning tool |
| 01/22/2003 | CN2532236Y Descaler |
| 01/22/2003 | CN1392220A Cleaning oil and gas well, pipeline, sleeve, stratum and equipment composition and its using method |
| 01/15/2003 | CN2531100Y Short piece movable nylon paraffin cutting centralizer for sucker rod |
| 01/15/2003 | CN1391027A Apparatus and method for removing wax from internal surface of oil delivering pipe by high-pressure steam |
| 01/15/2003 | CN1391026A Apparatus and method for removing wax from internal surface of sleeve pipe by high-pressure steam and compressed air |
| 01/08/2003 | EP1272734A1 New and improved method and apparatus for cleaning wellbore casing |
| 01/02/2003 | US20030000704 Method and apparatus for displacing drilling fluids with completion and workover fluids, and for cleaning tubular members |
| 01/02/2003 | EP1268975A2 Sand removal and device retrieval tool |
| 01/01/2003 | CN2528930Y Hydraulic machine scaler for tubular column of water well |
| 12/31/2002 | CA2232092C Method for removing debris from a well-bore |
| 12/18/2002 | EP1266123A1 Subsea production system |
| 12/18/2002 | EP1266120A1 Clean out tool |
| 12/17/2002 | US6494262 Non-cryogenic production of nitrogen for on-site injection in well clean out |
| 12/11/2002 | EP1264073A1 Downhole surge pressure reduction and filtering apparatus |
| 12/10/2002 | US6491117 Apparatus for retrieving metal debris from a well bore |
| 11/28/2002 | WO2002095186A1 Well cleaning apparatus |
| 11/28/2002 | WO2002063203A3 Method of diminishing the size of the cross section of an opening of a hollow device located in a flow pipe |
| 11/28/2002 | US20020174987 Sand removal and device retrieval tool |
| 11/27/2002 | EP1259701A1 Controlled downhole chemical injection |
| 11/27/2002 | EP1165936A4 Novel fluids and techniques for maximizing fracture fluid clean-up |
| 11/26/2002 | US6484802 Downhole scraper assembly |
| 11/20/2002 | EP1257727A1 Method of treating reservoir zone of hydrocarbon producing well to inhibit water production problems |
| 11/20/2002 | EP1017925B1 Method and compound for inhibiting the plugging of conduits by gas hydrates |
| 11/20/2002 | CN2521386Y Scraper for cleaning borehole or well |
| 11/13/2002 | CN2520410Y Geothermal crude oil production aid device |
| 11/12/2002 | US6478089 Automatic chemical stick loader for wells and method of loading |
| 11/07/2002 | US20020162655 Screened boot basket/filter |
| 11/05/2002 | US6474349 Ultrasonic cleanout tool and method of use thereof |
| 11/04/2002 | EP1068426A4 Apparatus and method for stimulating a subterranean formation |
| 10/31/2002 | US20020157305 Method of improving the flow properties of a crude oil or natural gas liquid |
| 10/30/2002 | EP1252263A1 Inhibition of asphaltene deposition in crude oil production systems |
| 10/29/2002 | US6470980 Self-excited drill bit sub |
| 10/29/2002 | CA2236563C Jetting tool for well cleaning |
| 10/29/2002 | CA2071683C Apparatus and facilities for cleaning drains, especially in an oil well |
| 10/24/2002 | US20020153135 Method and apparatus for stimulating well production |
| 10/22/2002 | US6467340 Asphaltenes monitoring and control system |
| 10/17/2002 | WO2002081859A1 An apparatus for retrieving metal debris from a well bore |
| 10/17/2002 | WO2002081858A1 Apparatus and method for collecting debris in a well bore |
| 10/16/2002 | EP0988440B1 Control and monitoring system for chemical treatment of an oilfield well |
| 10/15/2002 | US6464010 Apparatus and method for cleaning a tubular member with a brush |
| 10/15/2002 | CA2250518C Hydrostatic, slow actuating subterranean well tool manipulation device and method |
| 10/10/2002 | WO2002079604A2 Expandable downhole tool |
| 10/10/2002 | CA2442117A1 Expandable downhole tool |
| 10/09/2002 | CN1373284A Sealed oil well as oil reservoir |
| 10/08/2002 | US6460618 Method and apparatus for improving the permeability in an earth formation utilizing shock waves |
| 10/08/2002 | US6460617 Drillable casing brush |
| 10/08/2002 | US6460616 Traction apparatus |
| 10/03/2002 | US20020139524 Wellsite inert gas generator |
| 09/25/2002 | EP1242556A1 Acid based micro-emulsions |
| 09/25/2002 | CN2512905Y Leak-proof well flushing device for oil pumping well |
| 09/25/2002 | CN1370908A Continuous flushing tool |
| 09/24/2002 | US6454009 Apparatus and method for cleaning well risers |
| 09/24/2002 | US6453996 Apparatus incorporating jet pump for well head cleaning |
| 09/19/2002 | US20020132740 Anionic surfactant, a nonionic surfactant, a co- solvent, a solvent and an oxidizer; cleaning oil sludges and drilling mud residues from well cuttings, well formations and down hole and surface oil well drilling and production equipment. |
| 09/19/2002 | US20020129941 Automatic chemical stick loader for wells and method of loading |
| 09/19/2002 | US20020129456 Brush |
| 09/17/2002 | CA2104695C Method for regaining mud circulation in operating well and device for its embodiment |
| 09/12/2002 | US20020126021 Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters |