| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 06/26/2001 | US6250387 Apparatus for catching debris in a well-bore |
| 06/21/2001 | US20010004528 Use of 13c nuclear magnetic resonance to detect binding to target molecules |
| 06/14/2001 | WO2001042387A1 Acid based micro-emulsions |
| 06/12/2001 | US6244346 Method and apparatus for reducing fouling of injection and recovery wells |
| 06/07/2001 | WO2001040618A1 Method of improving the permeability of an earth formation |
| 06/06/2001 | CN2433388Y Rotary paraffin scraping centralising device |
| 06/05/2001 | CA2339685A1 Wellsite inert gas generator |
| 05/31/2001 | WO2001038694A1 Method and system for preventing hydrate formation by reinjecting hydrocarbon gas including methanol |
| 05/31/2001 | WO2001018351A8 Borehole cleaning apparatus and method |
| 05/30/2001 | EP1102916A1 Apparatus and method for perforating and stimulating a subterranean formation |
| 05/30/2001 | EP1102914A1 Downhole scraper assembly |
| 05/30/2001 | EP0939855B1 Additives for inhibiting formation of gas hydrates |
| 05/30/2001 | CN1066513C Method for inhibiting plugging of conduits |
| 05/24/2001 | US20010001418 Apparatus and method for perforating and stimulating a subterranean formation |
| 05/23/2001 | DE19932593C1 Generation method for pulsating pressure waves for well regeneration supplies pulsating pressure medium via buffer store into working section in well, to press water through filter walls into filter gravel |
| 05/23/2001 | CN1066129C Method for inhibiting hydrate formation |
| 05/17/2001 | WO2001034937A1 Method and device for exciting transversal oscillations of a pipe string in a borehole |
| 05/10/2001 | CA2324706A1 Sand protection system for electrical submersible pump |
| 05/08/2001 | US6227297 Tube cleaning article and apparatus and method for use with a tube in a well |
| 05/08/2001 | US6227291 Compact well clean up tool with multifunction cleaning apparatus |
| 05/03/2001 | WO2001031329A1 Deposition monitoring system |
| 05/03/2001 | WO2001031328A1 Downhole deposition monitoring system |
| 05/02/2001 | CN2428567Y Integrated high-magnetic-field wax-prevention device |
| 05/01/2001 | US6223840 Cutting bed impeller |
| 04/26/2001 | WO2001029370A1 Asphaltenes monitoring and control system |
| 04/25/2001 | EP1093541A1 Method for preventing deposits in oil extraction |
| 04/25/2001 | CN2427626Y Corrosion liquid filling-in equipment |
| 04/24/2001 | US6220356 Method and apparatus for well treating |
| 04/24/2001 | US6220347 Bore hole clearing |
| 04/22/2001 | CA2323290A1 Method and apparatus to remove coiled tubing deployed equipment in high sand applications |
| 04/19/2001 | WO2001027437A1 Method for de-waxing gas and oil wells and corresponding installation |
| 04/18/2001 | CN2426916Y Commutating teeth of automatic wax scraper for rod pumping unit |
| 04/17/2001 | US6216788 Sand protection system for electrical submersible pump |
| 04/17/2001 | US6216787 Apparatus for retrieving metal objects from a wellbore |
| 04/17/2001 | CA2124873C Iodine-containing corrosion inhibitor for oil field acidizing operations |
| 04/12/2001 | WO2001025642A1 Method of cavitation of a flow of liquid and device therefor |
| 04/10/2001 | US6214091 Ammonium and phosphonium hydration inhibitors such as the diester of dibutyldiethanol ammonium bromide and coconut fatty acid; for transport of hydrocarbon fluids |
| 04/03/2001 | US6209647 Down hole casing string cleaning device and method |
| 04/03/2001 | US6209640 Method of obtaining improved geophysical information about earth formations |
| 03/22/2001 | WO2001020124A1 Method and apparatus for through tubing gravel packing, cleaning and lifting |
| 03/15/2001 | WO2001018351A1 Borehole cleaning apparatus and method |
| 03/14/2001 | CN1063253C Oil well sealed storing oil device |
| 03/08/2001 | WO2001016459A1 Chemical injector for oil well treatment |
| 03/06/2001 | US6196320 Method of cleaning a well bore prior to installing a water based fluid system |
| 03/06/2001 | US6196319 Hydraulic sand removal tool |
| 02/28/2001 | EP0699269B1 Method for placement of a scale inhibitor in a formation |
| 02/28/2001 | CN2421410Y Sand washing device for sand control pipe of oil-water well |
| 02/27/2001 | US6192985 Fluids and techniques for maximizing fracture fluid clean-up |
| 02/22/2001 | DE10011256A1 Futterrohrschaber Casing scraper |
| 02/20/2001 | US6189618 Wellbore wash nozzle system |
| 02/20/2001 | US6189617 High volume sand trap and method |
| 02/14/2001 | EP1075586A1 Jet cleaning apparatus |
| 02/07/2001 | EP1073824A1 An apparatus, a system and a method for washing a tubular in a wellbore |
| 02/06/2001 | US6182754 Helical scraper apparatus for a reciprocating sucker rod |
| 02/06/2001 | CA2175900C Well cleanout system and method |
| 02/01/2001 | WO2001007752A1 Down hole casing string cleaning device |
| 01/18/2001 | WO2001004457A1 Downhole jetting tool |
| 01/18/2001 | CA2378670A1 Downhole jetting tool |
| 01/17/2001 | EP1068426A1 Apparatus and method for stimulating a subterranean formation |
| 01/16/2001 | US6173776 Cleaning compositions for oil and gas wells, lines, casings, formations and equipment and methods of use |
| 01/16/2001 | US6173771 Apparatus for cleaning well tubular members |
| 01/09/2001 | US6170577 Conduit cleaning system and method |
| 01/03/2001 | CN2413023Y Multi-functional casing scraper |
| 12/27/2000 | EP1062297A1 A method of improving the flow properties of a crude oil or natural gas liquid |
| 12/26/2000 | US6164380 Method for clearing debris in a bore |
| 12/21/2000 | WO2000077339A1 Method and apparatus for displacing drilling fluids with completion and workover fluids, and for cleaning tubular members |
| 12/13/2000 | EP0925423A4 Apparatus and method for perforating and stimulating a subterranean formation |
| 12/13/2000 | CN2410416Y Paraffin removal device for rod-pumped well |
| 12/12/2000 | US6160036 Microencapsulated drag reducing agents |
| 12/12/2000 | US6158512 Method and apparatus for the removal of sand in an underwater well |
| 12/12/2000 | US6158511 Apparatus and method for perforating and stimulating a subterranean formation |
| 12/07/2000 | WO2000073619A1 Subsurface apparatus |
| 11/28/2000 | US6152993 Method for inhibiting the plugging of conduits by gas hydrates |
| 11/28/2000 | US6152221 Apparatus with retractable cleaning members |
| 11/28/2000 | US6152220 Down-hole tool with centralising component |
| 11/22/2000 | CN1058782C Method for inhibiting hydrate formation |
| 11/21/2000 | US6148918 Wellbore cleaning tool and method |
| 11/21/2000 | US6148913 Oil and gas field chemicals |
| 11/15/2000 | CN2406061Y Heated-washing non-return valve for oil-well fitted sound-wave apparatus |
| 11/14/2000 | US6145598 Hydrostatic, slow actuating subterranean well tool manipulation device and method |
| 11/08/2000 | CN2405006Y Apparatus using hot oil cleaning bore hole for gas prodn. |
| 11/07/2000 | US6142232 Method and apparatus for cleaning wells |
| 11/07/2000 | CA2018493C Apparatus for extracting a liquid from a long tube |
| 10/31/2000 | US6138753 Technique for treating hydrocarbon wells |
| 10/31/2000 | US6138750 Water well stagnant bottom rehabilitation means and method |
| 10/29/2000 | CA2270503A1 Method of completing and producing hydrocarbons in a well |
| 10/26/2000 | WO2000063527A1 Method and apparatus for reducing fouling of injection and recovery wells |
| 10/26/2000 | CA2367601A1 Method and apparatus for reducing fouling of injection and recovery wells |
| 10/19/2000 | WO2000062074A1 Use of 13c-nmr to detect binding |
| 10/17/2000 | US6131657 Method for preventing or inhibiting metal deposition |
| 10/11/2000 | CN1269864A Method and compound for inhibiting plugging of conduits by gas hydrates |
| 10/05/2000 | WO2000058602A1 Method and apparatus for cleaning boreholes |
| 10/04/2000 | CN2399507Y Wellhead cleaning appts. for flexible continuous sucker rod |
| 10/03/2000 | US6126872 Shell-core polymers |
| 09/28/2000 | WO2000057023A1 Method of cleaning a well bore prior to installing a water based fluid system |
| 09/28/2000 | WO2000057022A1 Method for treatment of underground reservoirs |
| 09/27/2000 | CN1056903C Acidization for processing underground reservoirs |
| 09/26/2000 | US6122791 Retrievable pig |
| 09/19/2000 | CA2024866C Apparatus and facility for the cleaning of drains, particularly in an oil well |
| 09/13/2000 | EP0811110B1 Oil well treatment |