| 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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| 04/21/2010 | EP2176504A1 Multi-purpose well servicing apparatus |
| 04/14/2010 | CN201437698U Scale settler for oil/gas gathering and transportation pipeline |
| 04/01/2010 | WO2010010326A3 Pipeline entry system |
| 03/31/2010 | EP2167785A1 Magnet fixing device in a cleaning tool |
| 03/23/2010 | US7681633 Method and apparatus for preventing spillage or loss of drill fluids |
| 03/18/2010 | WO2009153560A3 Improved downhole apparatus |
| 03/10/2010 | CN201420520Y Highly-effective settling cup |
| 03/03/2010 | CN201416403Y Novel oilwell intercepting device |
| 02/23/2010 | US7665519 System and method for downhole sampling or sensing of clean samples of component fluids of a multi-fluid mixture |
| 01/28/2010 | US20100018775 Drilling Tool with Fluid Cleaner |
| 01/19/2010 | US7647962 Assembly and method of alternative pumping using hollow rods without tubing |
| 01/14/2010 | US20100006279 Intervention Tool with Operational Parameter Sensors |
| 12/23/2009 | WO2009153560A2 Improved downhole apparatus |
| 12/23/2009 | CN201367877Y Pebble collecting drill bit for pile foundation construction |
| 12/09/2009 | CN201358403Y Special compacted wire rope for sand-bailing in oilfield |
| 11/25/2009 | EP2122106A1 Drilling tool with fluid cleaner |
| 11/03/2009 | US7610957 Downhole debris catcher and associated mill |
| 10/29/2009 | US20090266546 Apparatus and Method For Discharging Multiple Fluids Downhole |
| 09/22/2009 | CA2541947C Sand removal and device retrieval tool |
| 09/11/2009 | WO2009109599A1 A method and an apparatus for downhole injecting one or more treatment fluids. |
| 09/02/2009 | CN201301676Y Oil-water well sand pump |
| 08/27/2009 | US20090211756 Formation tester with low flowline volume |
| 08/19/2009 | CN201292787Y Oil fetching and bailing suspension rope apparatus |
| 08/13/2009 | US20090200028 Wellbore delivery apparatus |
| 07/22/2009 | CN101487383A Oil/gas/water well sand pumping device |
| 07/08/2009 | EP2077373A1 Extruding and expanding drill equipment and the drilling method thereof |
| 07/07/2009 | US7556100 Apparatus and method for delivering chemicals into an underground well |
| 06/23/2009 | US7549480 Device for performing a downhole operation |
| 06/18/2009 | US20090151952 Energized fluids and pressure manipulation for subsurface applications |
| 06/17/2009 | CN201258709Y Sand shovel special for bailing in horizontal well |
| 05/28/2009 | WO2009065535A1 Well cleaning apparatus |
| 05/21/2009 | US20090126933 Device and method for retrieving debris from a well |
| 05/20/2009 | CN201241645Y Alloy double-valve sand-depositing machine |
| 05/13/2009 | CN201236657Y Casing milling oriented sand-settling device |
| 04/22/2009 | EP2049761A2 Laminate pressure-containing body for a well tool |
| 04/15/2009 | CN201221328Y Scraping and sweeping righting type sedimentation cup |
| 04/09/2009 | WO2009046307A2 Wellbore and reservoir treatment device |
| 04/07/2009 | CA2410398C Tracer release method for monitoring fluid flow in a well |
| 03/12/2009 | US20090065194 Downhole Sliding Sleeve Combination Tool |
| 03/11/2009 | CN101382056A Shovel special for bailing in horizontal well |
| 03/03/2009 | US7497260 Junk removal tool |
| 02/26/2009 | WO2007098285A3 Marginal oil extraction system |
| 02/12/2009 | WO2009020730A1 Eductor jet bushing for downhole use |
| 02/10/2009 | US7487831 Downhole surge pressure reduction and filtering apparatus |
| 02/05/2009 | US20090032256 Throttle unit for dump bailer and method of blocking a water out zone in a production well utilizing the same |
| 01/28/2009 | CN201187269Y Pressure-reducing sand deposition machine |
| 01/27/2009 | US7481271 Marginal oil extraction system |
| 01/20/2009 | US7478687 Coiled tubing conveyed milling |
| 01/14/2009 | CN201180525Y Apparatus used for oil well horizontal sand pumping |
| 01/14/2009 | CN201180524Y System used for oil well horizontal sand pumping |
| 01/14/2009 | CN201180523Y System used for oil well sand pumping |
| 01/14/2009 | CN201180522Y Apparatus used for horizontal well sand pumping |
| 01/14/2009 | CN201180521Y System used for horizontal well sand pumping |
| 01/14/2009 | CN201180520Y Apparatus used for oil well sand pumping |
| 01/14/2009 | CN201180508Y Negative pressure sand pumping apparatus for oil gas well |
| 01/06/2009 | US7472745 Well cleanup tool with real time condition feedback to the surface |
| 12/25/2008 | US20080314584 Ball catcher for wellbore operations |
| 12/18/2008 | WO2008021826A3 Laminate pressure-containing body for a well tool |
| 11/20/2008 | WO2008119085A3 Tubular cutting device |
| 11/18/2008 | US7451823 Well chemical treatment utilizing plunger lift delivery system with chemically improved plunger seal |
| 11/13/2008 | US20080277166 Downhole Drilling of a Lateral Hole |
| 11/13/2008 | US20080277121 Dust control system for transferring dry material used in subterranean wells |
| 10/30/2008 | WO2008024547A3 Well chemical treatment utilizing plunger lift delivery system with chemically improved plunger seal |
| 10/21/2008 | US7438125 Variable orifice bypass plunger |
| 10/14/2008 | CA2338416C Bore hole grouting apparatus and method |
| 10/08/2008 | CN201129168Y Dirty depositing device |
| 10/01/2008 | CN101275462A Horizontal well bailing system and method |
| 09/18/2008 | WO2008016868A9 Downhole abrading tool having a taggant injection assembly for indicating excessive wear |
| 09/04/2008 | WO2008104177A1 Drilling tool with fluid cleaner |
| 09/04/2008 | CA2685061A1 Drilling tool with fluid cleaner |
| 09/02/2008 | US7419937 Antiscaling agent for well bores; sustained release |
| 08/27/2008 | CN101250994A Oil well sand-pumping system as well as sand-pumping method thereof |
| 08/27/2008 | CN101250993A Horizontal oil well sand-pumping device as well as sand-pumping method thereof |
| 08/27/2008 | CN101250992A Oil well sand-pumping device as well as sand-pumping method thereof |
| 08/27/2008 | CN101250991A Oil well horizontal sand-pumping device as well as sand-pumping method thereof |
| 08/27/2008 | CN101250990A Oil well horizontal sand-pumping device as well as sand-pumping method thereof |
| 08/20/2008 | CN201103358Y High-capacity bailer |
| 07/31/2008 | US20080179054 Methods for expandable storage and metering |
| 07/30/2008 | CN201092826Y Anti-drop sand-pumping rotary rope device |
| 07/17/2008 | WO2006120581A3 Digger for piles |
| 06/12/2008 | WO2008069815A1 Low resin demand foundry media |
| 05/28/2008 | CN201065751Y Movable board type water injection filter |
| 05/21/2008 | CN101182758A Oilfield down-hole bailing tub |
| 05/08/2008 | WO2008016868A8 Downhole abrading tool having a taggant injection assembly for indicating excessive wear |
| 05/06/2008 | US7367392 Wellbore apparatus with sliding shields |
| 04/10/2008 | WO2008017019A3 Annular flow shifting device |
| 04/03/2008 | US20080078554 Imputing strength gradient in pressure vessels |
| 03/20/2008 | US20080066911 Oilfield material delivery mechanism |
| 03/20/2008 | US20080066908 System and method for downhole sampling or sensing of clean samples of component fluids of a multi-fluid mixture |
| 03/20/2008 | US20080066904 Formation Fluid Sampling Tools and Methods Utilizing Chemical Heating |
| 03/13/2008 | US20080060802 System for reducing adhesion and cohesion between non metallic bailers and side wall of wells |
| 03/11/2008 | US7341108 Well downhole liquid dispenser |
| 02/28/2008 | WO2008024547A2 Well chemical treatment utilizing plunger lift delivery system with chemically improved plunger seal |
| 02/27/2008 | CN201027513Y Spraying bailing bucket |
| 02/27/2008 | CN201027512Y Sand pumping device of oil-water well |
| 02/21/2008 | WO2008021826A2 Laminate pressure-containing body for a well tool |
| 02/20/2008 | CN201024943Y Water injection well sand dragger |
| 02/14/2008 | US20080035328 Laminate pressure containing body for a well tool |
| 02/13/2008 | EP1644671B1 A method of constructing a geothermal heat exchanger |
| 02/07/2008 | WO2008016868A1 Downhole abrading tool having a taggant injection assembly for indicating excessive wear |