| Patents for E21B 27 - Containers for collecting or depositing substances in boreholes or wells, e.g. bailers for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits (1,068) |
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| 03/15/2012 | US20120061073 Debris Chamber with Helical Flow Path for Enhanced Subterranean Debris Removal |
| 03/14/2012 | CN202165036U 井筒清砂管柱 Wellbore sand column |
| 03/07/2012 | CN202157773U 捞渣筒 Slag barrel |
| 03/06/2012 | US8127855 Artificial lift system for stripper and marginal wells |
| 03/01/2012 | WO2011091157A3 Differential pressure wellbore tool and related methods of use |
| 02/25/2012 | CA2743825A1 Oil catch pan |
| 02/23/2012 | WO2011091165A3 Wellbore filter screen and related methods of use |
| 02/07/2012 | US8109331 Slickline conveyed debris management system |
| 02/01/2012 | CN102337847A Automatically starting type sand fishing pump |
| 01/31/2012 | CA2568940C Method for monitoring fluid levels in a tank |
| 01/25/2012 | CN202125269U Rotary drilling rig and drilling tool of rotary drilling rig |
| 01/19/2012 | US20120012334 Method and apparatus for use with downhole tools having gas-filled cavities |
| 01/11/2012 | CN102312660A Hole cleaning drilling tool |
| 01/04/2012 | CN101182758B Oilfield down-hole bailing tub |
| 12/22/2011 | WO2011132040A3 Utilisation of tracers in hydrocarbon wells |
| 12/22/2011 | US20110308804 Downhole Mixing Tool |
| 12/21/2011 | CN202081847U 井底落物收集工具 Bottom of the litter collection tool |
| 12/21/2011 | CN202081818U 旋挖式垃圾山钻井机 Rotary drilling rigs garbage mountain |
| 12/21/2011 | CN102287152A 一种旋转喷射清砂方法 A rotating jet sand method |
| 12/14/2011 | CA2706803A1 Portable materials handling apparatus |
| 11/23/2011 | CN202047771U Novel small falling object collector |
| 11/23/2011 | CN202047752U Drill bit of impact drill |
| 11/22/2011 | US8061432 Method for rehabilitation of a ballast bed of a track |
| 11/17/2011 | WO2011140622A1 Oil leak collector device and oil storage device |
| 11/15/2011 | US8056622 Slickline conveyed debris management system |
| 11/09/2011 | CN202031542U Bailing device for oil well |
| 10/27/2011 | WO2011132040A2 Utilisation of tracers in hydrocarbon wells |
| 10/06/2011 | US20110240283 Well assembly with a millable member in an opening |
| 10/05/2011 | CN202000939U Bottom opening, closing and locking mechanism with protective device for rotary drilling rig dual-bottom bailing drilling bucket |
| 09/27/2011 | US8025102 Wellbore delivery apparatus |
| 09/20/2011 | CA2475602C System for forming a window and drilling a sidetrack wellbore |
| 09/15/2011 | US20110220412 Formation Evaluation While Drilling |
| 09/07/2011 | CN201963230U 注水井管端总成 Injection Wells tube end assembly |
| 08/30/2011 | US8007922 Articles having improved resistance to thermal cracking |
| 08/24/2011 | CN201943618U 扩孔桩清底钻斗 Clear bottom reaming pile drill bucket |
| 08/24/2011 | CN201943617U 一种抽油泵管柱自动卸砂防卡器装置 One kind of pump tubing string automatic unloading device erosion control card |
| 08/18/2011 | US20110198079 Phase sampler probe and method of using thereof |
| 08/17/2011 | CN1926304B Downhole drilling of a lateral hole |
| 08/11/2011 | US20110192602 Well Flow Control Systems and Methods |
| 08/09/2011 | US7992636 Device and method for retrieving debris from a well |
| 07/28/2011 | CA2787145A1 Wellbore filter screen and related methods of use |
| 07/28/2011 | CA2787141A1 Differential pressure wellbore tool and related methods of use |
| 07/21/2011 | US20110174484 Well tools operable via thermal expansion resulting from reactive materials |
| 07/21/2011 | US20110174478 Apparatus for continuous downhole fluid release and well evaluation |
| 07/20/2011 | EP2345790A2 Downhole chemical injection tool |
| 07/20/2011 | CA2782660A1 Wellbore knock-out chamber and related methods of use |
| 07/14/2011 | WO2011017105A3 Wellbore cleanout tool |
| 06/30/2011 | US20110155390 Apparatus and method for pumping a fluid and an additive from a downhole location into a formation or to another location |
| 06/22/2011 | EP2336485A2 Continuous slow dissolving chemical treatment for oil and gas wells |
| 06/16/2011 | WO2011071593A1 Continuous slow dissolving chemical treatment for oil and gas wells |
| 06/16/2011 | WO2011023943A3 Methods and apparatus for releasing a chemical into a well bore upon command |
| 06/01/2011 | CN201851048U Gas lift mixed discharging sand removing tank |
| 06/01/2011 | CN201851047U Multistage cyclone desanding device |
| 05/25/2011 | CN201843552U Circulating working fluid filter |
| 05/25/2011 | CN201843551U Milling scrap iron collector |
| 05/24/2011 | US7946360 Downhole drilling of a lateral hole |
| 05/12/2011 | US20110108285 Method and apparatus for a wellbore assembly |
| 04/20/2011 | CN201802333U Drilling rig transmission device |
| 04/13/2011 | CN201794539U Self-cleaning desanding device of underground tool |
| 03/24/2011 | US20110067873 Use of Foam Shape Memory Polymer To Transport Acid or Other Wellbore Treatments |
| 03/16/2011 | EP2295709A1 Downhole tool head for mounting onto a downhole tool for releasing of precipitated solids |
| 03/16/2011 | CN201763288U Self-cleaning type sand setting collector |
| 03/03/2011 | WO2010129888A3 Dual action jet bushing |
| 03/03/2011 | WO2009112530A3 A tool for shutting off openings or leaks in a well bore |
| 03/02/2011 | EP2290192A1 Apparatus and method for autofill equipment activation |
| 03/01/2011 | US7896071 Method for continous downhole fluid release and well evaluation |
| 02/24/2011 | WO2011020917A1 Downhole tool head for releasing precipitated solids |
| 02/24/2011 | CA2768753A1 Downhole tool head for releasing precipitated solids |
| 02/16/2011 | CN201747329U Sand cleaning tool of large-inclination and large-well diameter absorption well |
| 02/10/2011 | CA2769479A1 Wellbore cleanout tool |
| 02/09/2011 | CN201738851U Differential pressure sand-pumping device applied to oil wells and gas wells |
| 02/09/2011 | CN101250990B Oil well horizontal sand-pumping device as well as sand-pumping method thereof |
| 01/26/2011 | CN201723192U Device for desilting plug-drilling tool |
| 01/19/2011 | CN201714325U Emitting-spraying-lifting liquid collecting device |
| 01/13/2011 | WO2011005988A1 Apparatus and methods for inserting and removing tracer materials in downhole screens |
| 01/12/2011 | EP2271825A2 Apparatus and method for discharging multiple fluids downhole |
| 01/06/2011 | WO2011001198A1 Arrangement used in oil field wells for lifting hydrocarbons |
| 12/01/2010 | EP2255062A1 A method and an apparatus for downhole injecting one or more treatment fluids. |
| 11/11/2010 | WO2010129888A2 Dual action jet bushing |
| 11/11/2010 | CA2760950A1 Dual action jet bushing |
| 11/03/2010 | CN201620791U Thermal production steam injecting string drop collector |
| 09/23/2010 | US20100236833 Displaceable Plug in a Tool String Filter |
| 09/22/2010 | CN201588578U Spiral groove fishing cup |
| 09/22/2010 | CN101250994B Oil well sand-pumping system as well as sand-pumping method thereof |
| 09/22/2010 | CN101250992B Oil well sand-pumping device as well as sand-pumping method thereof |
| 09/22/2010 | CN101250991B Oil well horizontal sand-pumping device as well as sand-pumping method thereof |
| 08/31/2010 | US7784535 Top drive systems with reverse bend bails |
| 08/25/2010 | CN201560746U Sand-bailing device of mechanical oil production well |
| 07/21/2010 | CA2652946A1 Cbm horizontal hydrostatic bailer |
| 07/09/2010 | CA2689867A1 Detonator for material-dispensing wellbore tools |
| 07/01/2010 | US20100163245 Artificial lift system for stripper and marginal wells |
| 06/29/2010 | CA2593774C Finger boot basket |
| 06/24/2010 | US20100155054 Dump bailer |
| 06/15/2010 | US7735550 Throttle unit for dump bailer and method of blocking a water out zone in a production well utilizing the same |
| 06/03/2010 | WO2009046307A3 Wellbore and reservoir treatment device |
| 06/02/2010 | EP2192262A1 Dump Bailer |
| 05/28/2010 | CA2686298A1 Dump bailer |
| 05/20/2010 | WO2008107798A3 Heating device for passage through subterranean asphalt and method of use |
| 05/11/2010 | US7713002 Drilling device and method for producing a drilling column in the soil |
| 05/05/2010 | CN201448076U Draw tube for removing water and sediment in hole |