| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 03/15/2007 | US20070056773 Downhole impeller device |
| 03/15/2007 | US20070056738 Stimulation and injection system |
| 03/14/2007 | CN1928320A Cleaning wax apparatus |
| 03/14/2007 | CN1928318A Stainless steel seepage scale removal blowdown backwash fine filter for flooding well |
| 03/13/2007 | US7188676 Pumping into the well a composition to dissolve oil and dispersing solids, inhibiting the formation of solid, improve the permeability; containing dispersants, pH adjusting agent, solvents, salts; subterranean oil well |
| 03/07/2007 | CN2876322Y Jet beat washing wax removing chemical adding multi purpose car |
| 03/06/2007 | US7185704 Service tool with flow diverter and associated method |
| 03/01/2007 | WO2007003894A3 Wellbore cleaning method and apparatus |
| 03/01/2007 | WO2005086799A3 Multi-fluid sparging |
| 02/28/2007 | CN2874017Y Paraffin cleaning stick for oil well |
| 02/28/2007 | CN2874016Y Paraffin scrapper |
| 02/28/2007 | CN2874009Y Up-and-down wall scraper |
| 02/28/2007 | CN1920247A Magneto-thermo wax-proofing apparatus for oil exploitation |
| 02/27/2007 | US7182138 Reservoir communication by creating a local underbalance and using treatment fluid |
| 02/22/2007 | US20070039739 Well chemical treatment utilizing plunger lift delivery system with chemically improved plunger seal |
| 02/22/2007 | US20070039737 Dual function cleaning tool |
| 02/21/2007 | CN2871804Y Stabilizer of high-magnetic waxproofing oil-pumping unit |
| 02/21/2007 | CN2871803Y Stabilizer of strong-magnetic waxproofing oil-pumping unit |
| 02/21/2007 | CN2871797Y Sucker rod of positioning rotary wax scraping stabilizer |
| 02/20/2007 | US7178593 Piggable separation system and method |
| 02/20/2007 | US7178588 Flexible cup for downhole devices |
| 02/15/2007 | WO2007017353A1 System for cyclic injection and production from a well |
| 02/15/2007 | WO2006085791A3 Method for heating an oil-producing well with the aid of a deep-well pump, a device for carrying out said method and a deep-well pump (variants) for said device |
| 02/15/2007 | US20070034369 Controlling transient pressure conditions in a wellbore |
| 02/15/2007 | CA2617891A1 System for cyclic injection and production from a well |
| 02/14/2007 | EP1750930A1 Downhole ultrasonic well cleaning device |
| 02/14/2007 | CN2869307Y Antisluding device |
| 02/14/2007 | CN2869306Y Differential pressure self-sealing composite heat flushing protector |
| 02/13/2007 | US7177016 Electronic surveying apparatus |
| 02/13/2007 | US7174958 Drill string member |
| 02/08/2007 | US20070029086 Methods of forming packs in a plurality of perforations in a casing of a wellbore |
| 02/08/2007 | CA2614868A1 Scale inhibiting well treatment |
| 02/07/2007 | EP1749142A2 Filter cake degradation compositions and associated methods |
| 02/06/2007 | US7172026 Apparatus to allow a coiled tubing tractor to traverse a horizontal wellbore |
| 01/31/2007 | CN2864074Y Two-side wax scraping centralizer |
| 01/30/2007 | US7168494 Dissolvable downhole tools |
| 01/25/2007 | WO2007011475A1 Middle phase micro emulsions and process of making and using the same |
| 01/25/2007 | WO2006010124A3 Fluid conditioning system and method |
| 01/25/2007 | US20070017679 Downhole multi-action jetting tool |
| 01/24/2007 | CN2861453Y Wall-cleaning machine of tubing inner wall |
| 01/24/2007 | CN2860932Y Self-cycle well cleanup vehicle for oil field water injection well |
| 01/24/2007 | CN1902376A Dissolving filter cake |
| 01/23/2007 | CA2472105C Apparatus and method for cleaning and sealing a well borehole portion for formation evaluation |
| 01/23/2007 | CA2193923C Method of oil/gas stimulation |
| 01/18/2007 | US20070012451 Piggable flowline-riser system |
| 01/17/2007 | CN2858939Y General paraffin scraper of oil well |
| 01/17/2007 | CN1896455A Mud-scraping ring and scraper for drilling-rod external wall |
| 01/16/2007 | CA2347957C Method and composition for sweep of cuttings beds in a deviated borehole |
| 01/11/2007 | WO2007004886A1 Device and method for cleaning a compressor |
| 01/11/2007 | WO2007003894A2 Wellbore cleaning method and apparatus |
| 01/11/2007 | CA2612092A1 Wellbore cleaning method and apparatus |
| 01/10/2007 | EP1740671A1 Inhibitive water-based drilling fluid system and method for drilling sands and other water-sensitive formations |
| 01/09/2007 | US7159675 Method of drilling a borehole into an earth formation |
| 01/09/2007 | US7159658 well completion using mixtures of water, viscosity increasing polymers and water soluble strongly delayed polymer breakers comprising chelating agents, peroxide and iron source; removal of filter cakes |
| 01/09/2007 | US7159655 pumping well completion fluids comprising cationic polymers and brines, used as antiscaling agents |
| 01/06/2007 | CA2552073A1 Rod for a well string |
| 01/03/2007 | EP1556458B1 Self-destructing filter cake |
| 01/03/2007 | CN1890453A Method and system for injecting a treatment fluid into a well |
| 01/02/2007 | US7156177 For dissolving scale (e.g barite and calcite) in a subterranean hydrocarbon-bearing formation; has a surfactant for reducing the viscosity of the fluid |
| 12/27/2006 | CN1884791A Permanent magnetic casing type adhesion reducing and wax preventing device for down-hole oil production |
| 12/26/2006 | US7152697 Stabilizing with amine surfactant primarily in unprotonated form; charging with such as ethylene diamine tetraacetic acid |
| 12/21/2006 | US20060283599 Methods for remediating subterranean formations |
| 12/20/2006 | CN2849151Y Oil well puraffin preventer |
| 12/20/2006 | CN2848845Y Plugging type rare earth permanent magnet wax preventing scale remover |
| 12/20/2006 | CN1882759A Method for providing a temporary barrier in a flow pathway |
| 12/14/2006 | US20060278395 Flow reversing apparatus and methods of use |
| 12/12/2006 | CA2216430C Hydrocarbon production using multilateral well bores |
| 12/07/2006 | US20060272809 Wellbores utilizing fiber optic-based sensors and operating devices |
| 12/06/2006 | CN2844425Y Solid waxproofing equipment under pump of oil well |
| 12/06/2006 | CN1288327C Composite for stratum treatment and method thereof |
| 12/05/2006 | US7143829 Downhole tool |
| 12/05/2006 | US7143827 Placing a spacer fluid between first and second fluids to separate first and second fluids and to remove first fluid from the walls of well bore, displacing first fluid and spacer fluid from well bore with second fluid |
| 11/29/2006 | EP1266123B1 Subsea production system |
| 11/28/2006 | US7140438 Orthoester compositions and methods of use in subterranean applications |
| 11/23/2006 | WO2006123109A1 Device and method for retrieving debris from a well |
| 11/23/2006 | CA2608292A1 Device and method for retrieving debris from a well |
| 11/21/2006 | US7137449 Magnet arrangement and method for use on a downhole tool |
| 11/21/2006 | CA2345305C Acidic surfactant composition and method for cleaning wellbore and flowline surfaces using the surfactant composition |
| 11/16/2006 | WO2006121699A2 Flow through subassembly for a downhole drill string and method for making same |
| 11/16/2006 | WO2006120453A1 Wellbore cleaning tool and method |
| 11/16/2006 | US20060254770 Method and composition for cleaning a well bore prior to cementing |
| 11/16/2006 | CA2606899A1 Flow through subassembly for a downhole drill string and method for making same |
| 11/16/2006 | CA2606782A1 Wellbore cleaning tool and method |
| 11/15/2006 | EP1720954A1 Drilling fluids with improved shale inhibition and methods of drilling in subterranean formations |
| 11/14/2006 | US7135440 Method for controlled placement of oilfield chemicals and composition useful for practicing same |
| 11/14/2006 | US7134496 Reducing or removing wellbore skin damage, invert emulsion drilling fluid and filter cake deposition during and after oil well drilling |
| 11/14/2006 | US7134494 Method and system for recirculating fluid in a well system |
| 11/14/2006 | CA2307227C Method and apparatus for the removal of sand in an underwater well |
| 11/14/2006 | CA2300683C Coiled tubing drilling with supercritical carbon dioxide |
| 11/07/2006 | US7131495 adding chlorates or stable chlorine dioxide and water into one tank; in another tank adding acidic substances, which can be dissolved in water and produce hydrogen ion in an aqueous solution; providing a high pressure injection pump |
| 11/01/2006 | CN2833100Y Paraffin cleaner for ground oil pipe |
| 10/31/2006 | CA2270218C Heavy oils with improved properties and an additive for the same |
| 10/25/2006 | EP1713568A1 Use of polyaminothylenephosphonates as dispersing agents |
| 10/24/2006 | US7124822 introducing a completion fluid: water; lts selected from ammonium chloride, sodium chloride/bromide/formate, potassium chloride/formate, calcium chloride/bromide, zinc bromide, and cesium formate; oxygen or nitrogen gas; capryl/capramidopropylbetaine surfactant foaming agent to a subterranean zone |
| 10/24/2006 | CA2508339C Drilling fluid and methods of use thereof |
| 10/19/2006 | WO2006109008A1 Apparatus for removing debris in a wellbore |
| 10/18/2006 | EP1339937A4 Improved method for stimulation of liquid flow in a well |
| 10/18/2006 | CN2828308Y Sucker rod oil wiper |
| 10/17/2006 | US7121343 Selectively operational cleaning tool |
| 10/17/2006 | US7121336 Well scrubber |