| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 02/12/2014 | CN103573231A Method for improving recovery ratio of sensitive heavy oil reservoir |
| 02/12/2014 | CN103573216A Automatic dosing device of mechanical wellhead of sucker rod pump pumping well |
| 02/12/2014 | CN102287167B Method for removing and preventing wax of mechanical recovery well by microorganism |
| 02/11/2014 | CA2761304C Packer retrieving mill with debris removal |
| 02/05/2014 | CN203420675U Multifunctional chemical feeding funnel conveniently assembled on or disassembled from oil well |
| 02/05/2014 | CN203420674U Paraffin removal pulley capable of preventing steel wire from jumping out of groove |
| 02/05/2014 | CN203420673U Frequency-conversion electric heating device for oil pipes |
| 01/30/2014 | WO2013093789A3 Method and system for processing a stream comprising glycol based and kinetic hydrate inhibitors |
| 01/29/2014 | CN203412565U Acid fracturing and thermal washing crowbar |
| 01/29/2014 | CN203412548U Novel wellhead quantitative agent adding system |
| 01/29/2014 | CN103541690A Pigging and skiving device |
| 01/29/2014 | CN103541689A 弹簧式刮削器 Spring-loaded scrapers |
| 01/29/2014 | CN103541688A Paraffin removal shuttle |
| 01/29/2014 | CN103541687A Electric heating well washing device for producing well |
| 01/28/2014 | CA2688106C Methods for cleaning out horizontal wellbores using coiled tubing |
| 01/23/2014 | WO2014013250A2 Magnetic cleaning tool |
| 01/22/2014 | EP2686516A2 Fluid-actuated downhole tool |
| 01/22/2014 | CN103527165A Downhole three-phase separating device |
| 01/22/2014 | CN103527145A 蒸汽清蜡车 Steam car wax |
| 01/22/2014 | CN103527144A Wear-resistant sucker rod permanent magnet paraffin control device |
| 01/16/2014 | WO2014011587A1 Breaker fluid |
| 01/16/2014 | US20140014350 Circulating coil cleanout tool and method |
| 01/16/2014 | US20140014335 Families of scale-inhibitors having different absorption profiles and their application in oilfield |
| 01/15/2014 | CN203394440U Vehicle-borne skid-mounted intelligent oil well chemical dosing device |
| 01/15/2014 | CN103510916A Jet flow well flushing device |
| 01/15/2014 | CN103509540A Gradual injection oil layer deep part blocking remover and injection technology thereof |
| 01/14/2014 | CA2632285C Washing a cylindrical cavity |
| 01/13/2014 | CA2782874A1 Circulating coil cleanout tool and method |
| 01/09/2014 | WO2014008482A1 Apparatus for removal of alkaline earth metal salt scale and method |
| 01/09/2014 | WO2012174600A8 A flushing tool and method of flushing perforated tubing |
| 01/09/2014 | US20140008070 Pulsating rotational flow for use in well operations |
| 01/09/2014 | CA2878358A1 Apparatus for removal of alkaline earth metal salt scale and method |
| 01/08/2014 | CN203383785U Solid corrosion and scale inhibition agent injection device for oil well |
| 01/08/2014 | CN103502566A Downhole cleaning system |
| 01/03/2014 | WO2014004697A2 Method of removing inorganic scales |
| 01/03/2014 | CA2877138A1 Method of removing inorganic scales |
| 01/02/2014 | US20140000900 Drill string mountable wellbore cleanup apparatus and method |
| 01/01/2014 | EP2678522A2 Method of introducing treatment agents into a well or flow conduit |
| 01/01/2014 | CN203374246U Oil well thermal washing recording instrument |
| 01/01/2014 | CN103484088A Blocking remover suitable for acidification of complex lithologic reservoirs and acidification blocking removing method |
| 12/27/2013 | WO2013190093A2 A predictive flow assurance assessment method and system |
| 12/25/2013 | EP2677115A1 A predictive flow assurance assessment method and system |
| 12/25/2013 | CN203362140U Vehicle-mounted movable dosing device for mechanical recovery well |
| 12/25/2013 | CN203362120U Horizontal well segmented even negative pressure acid pickling tubular column |
| 12/25/2013 | CN203362119U Logging sludge scraper protection device |
| 12/25/2013 | CN203362118U Viscosity-reducing and oil-enhancing wax control device |
| 12/25/2013 | CN102134982B Multilayer gravel packing method and tool |
| 12/25/2013 | CN101925719B Breaker fluids and methods of using same |
| 12/24/2013 | CA2606899C Flow through subassembly for a downhole drill string and method for making same |
| 12/19/2013 | WO2013039943A3 Method and apparatus for unplugging hydrocarbon drains or vents |
| 12/18/2013 | CN203347749U Composite tube scraper |
| 12/18/2013 | CN203347748U Well bottom silt extracting device |
| 12/18/2013 | CN203347747U Anti-pollution thermal washing tubular column |
| 12/18/2013 | CN103452528A Quick wax removal method for wax in oil well oil pipe by hot gas |
| 12/17/2013 | US8607871 Oilfield jetting tool |
| 12/12/2013 | WO2013184238A1 Systems and methods for secondary sealing of a perforation within a wellbore casing |
| 12/12/2013 | US20130327528 Downhole Assembly for Treating Wellbore Components, and Method for Treating a Wellbore |
| 12/11/2013 | EP2670943A1 Tool and method to plug and abandon a well |
| 12/11/2013 | CN203335032U Fixed paraffin removal anti-bouncing pulley |
| 12/11/2013 | CN103437738A Slip type integrated descaling device with downhole packing and throttling functions |
| 12/11/2013 | CN103436244A Composite unblocking agent and method for composite unblocking by using temporary blocking agent and composite unblocking agent |
| 12/10/2013 | CA2635032C Scale inhibiting well treatment |
| 12/10/2013 | CA2502598C Openhole perforating |
| 12/05/2013 | WO2013179236A1 System and method for removal of heavy metal ions from a rich hydrate inhibitor stream |
| 12/05/2013 | WO2013154468A3 Method for increasing hydrocarbon extraction and for ensuring the continuous operation of wells |
| 12/05/2013 | WO2013147650A3 Device for supplying reagent to a well |
| 12/04/2013 | EP2669464A1 A clean-out tool for cleaning out a well bore and a method for cleaning out a well bore using such a clean-out tool |
| 12/04/2013 | CN203321445U Multi-well well mouth chemical dosing device with backflow self-protection multichannel solenoid valve terminal |
| 12/04/2013 | CN203321444U 自动液位控制仪 Automatic level control instrument |
| 12/04/2013 | CN203321443U Novel anti-disengaging screwed connection wax removal device |
| 12/04/2013 | CN203321442U Downhole operation multi-functional casing scaler |
| 12/04/2013 | CN103422836A Environmental-friendly oil field rod pipe wax-cleaning descaling device |
| 11/28/2013 | US20130312977 Apparatuses, systems, and methods for forming in-situ gel pills to lift liquids from horizontal wells |
| 11/27/2013 | CN203308443U Circulating gas injection pipe column |
| 11/27/2013 | CN203308435U Fast workover pipe column |
| 11/27/2013 | CN103410475A Environment-friendly annular continuous dosing automatic device for oil-gas wells and dosing method |
| 11/27/2013 | CN103410474A Corrosion control method for annular space tubing and casings of oil field water injection well |
| 11/27/2013 | CN103410473A Three-in-one depression and augmented injection technology |
| 11/27/2013 | CN103410472A Wax-removal, wax-proof and viscosity reduction technology with super conductive heat pipe |
| 11/26/2013 | CA2686508C Process and process line for the preparation of hydraulic fracturing fluid |
| 11/21/2013 | US20130306323 Composition for Removing Scale Deposits |
| 11/21/2013 | US20130306319 Hydraulic Pulse Valve With Improved Pulse Control |
| 11/21/2013 | US20130306309 Single Packer System For Fluid Management In A Wellbore |
| 11/20/2013 | CN203296751U Device capable of conducting automatic regular electromagnetic dredging for oil pipeline |
| 11/20/2013 | CN103397864A Oil field automatic feed descaling wax removal device with rubber doctor blade assembly |
| 11/20/2013 | CN103396776A Self-generating foam blocking removal agent for oil-water well and blocking removal process |
| 11/19/2013 | US8586511 Scale inhibiting well treatment |
| 11/19/2013 | US8584760 Cleaning agents for wellbore cleaning and methods of use thereof |
| 11/13/2013 | CN203285393U Scale scrapping device of pumping unit polish rod |
| 11/13/2013 | CN203285390U Well-flushing circulating check valve on pump |
| 11/13/2013 | CN203285375U Blocking gauge cutter |
| 11/13/2013 | CN103388468A Oilfield automatic feed descaling and dewaxing device with movable lifting mechanism |
| 11/06/2013 | CN203271680U Filling connector of hollow sucker rod |
| 11/06/2013 | CN203271679U Detachable type underground solid anti-wax and anti-scale device |
| 11/06/2013 | CN203271678U Combined tapered mill for descaling and drifting |
| 11/06/2013 | CN203271677U High-intensity magnetic field oil well paraffin prevention device capable of removing iron sand |
| 11/06/2013 | CN203271676U Magnetic rotation jet flow block removing and lifting device |
| 11/06/2013 | CN203271675U Wax-resisting and scale-inhibiting process device for oil well |
| 11/06/2013 | CN102703045B Multi-slug composite pressure decreasing and injection increasing agent for ultra-low permeability oil field |
| 11/06/2013 | CN102643635B Stratum water-injection augmented injection agent of oil field |