| 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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| 02/06/2008 | CN201016286Y Cable pump suction type sand pumping device |
| 01/30/2008 | CN201013284Y Oil well junk collecting device |
| 01/30/2008 | CN201013283Y Slot type fishing cup |
| 01/29/2008 | US7322408 Downhole tool with actuable barrier |
| 01/24/2008 | WO2007140313A3 Well cleanup tool with real time condition feedback to the surface |
| 01/23/2008 | CN101111661A Method of installing an expandable tubular in a wellbore |
| 01/17/2008 | US20080011480 Downhole surge pressure reduction and filtering apparatus |
| 01/01/2008 | US7314081 Pumping from two levels of a pool of production fluid, and one way valve therefore |
| 12/18/2007 | CA2412144C Isolation container for a downhole electric pump |
| 12/06/2007 | WO2007140313A2 Well cleanup tool with real time condition feedback to the surface |
| 12/06/2007 | CA2655646A1 Well cleanup tool with real time condition feedback to the surface |
| 12/04/2007 | US7303016 Casing with isolated annular space |
| 11/29/2007 | US20070273196 Method and apparatus for utilizing the full capacity of a particular type of mine hoist for excavating deep shafts |
| 11/28/2007 | CN200982171Y Multi-stage diversion filtering type salvaging cup for workover treatment |
| 11/22/2007 | US20070267225 Auger loading apparatus and machine with same |
| 11/22/2007 | US20070267224 Drilling device and method for producing a drilling column in the soil |
| 10/24/2007 | CN200964811Y High-efficiency sand pump barrel |
| 09/18/2007 | US7270182 Earth loop installed with sonic apparatus |
| 09/18/2007 | US7270181 Downhole surge pressure reduction and filtering apparatus |
| 09/12/2007 | CN200946475Y Practical combined funnel for filling sand |
| 08/30/2007 | WO2007098285A2 Marginal oil extraction system |
| 08/30/2007 | US20070199692 Marginal oil extraction system |
| 08/16/2007 | US20070187152 Rock drill water separator |
| 08/15/2007 | CN2934554Y Water well operation vehicle |
| 06/28/2007 | CA2530729A1 Barrel debris trap |
| 06/26/2007 | US7234538 Method for sinking a borehole in the ground and wet boring tool |
| 06/14/2007 | US20070131426 Junk removal tool |
| 06/06/2007 | CN2908618Y Sand dredge-out dipper capable of automatic opening |
| 06/05/2007 | CA2401116C Sand removal and device retrieval tool |
| 05/30/2007 | CN2906038Y Rubbish collecting device for oil production well |
| 05/29/2007 | US7222668 Sample extraction system for boreholes |
| 05/15/2007 | CA2459646C Down hole well cleaning apparatus |
| 04/24/2007 | CA2390523C Apparatus for delivering a flowable substance to a remote location |
| 04/18/2007 | CN1311141C Method for drilling a borehole and wet boring tool |
| 04/04/2007 | CN2886064Y Junk collecting device in sidetracked hole |
| 04/03/2007 | US7198099 Method and system for injecting a treatment fluid into a well |
| 03/14/2007 | CN2878656Y Open-type drill hopper |
| 03/14/2007 | CN1304724C Device for performing a downhole operation in well formed in stratum |
| 03/07/2007 | CN1926304A Downhole drilling of a lateral hole |
| 03/01/2007 | WO2006057646A3 System and method of installing and maintaining offshore exploration and production system having adjustable buoyancy chamber |
| 02/22/2007 | US20070039739 Well chemical treatment utilizing plunger lift delivery system with chemically improved plunger seal |
| 02/13/2007 | US7174957 Magnetic bailer |
| 02/07/2007 | CN2866796Y Antisand sticking apparatus |
| 01/23/2007 | US7165634 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 01/18/2007 | US20070012446 Earth loop installed with sonic apparatus |
| 12/27/2006 | CN2851535Y Electric pump sand-settling apparatus |
| 12/06/2006 | EP1727627A2 Automatic tank cleaning system |
| 12/06/2006 | EP1444404B1 Pile reamer with spoil container |
| 12/02/2006 | CA2548639A1 Method for assessing the acidity of petroleum samples by isotopic marking |
| 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 |
| 11/14/2006 | CA2307227C Method and apparatus for the removal of sand in an underwater well |
| 11/08/2006 | EP1319115B1 Methods and apparatus for forming a lateral wellbore |
| 10/10/2006 | US7117947 Well chemical treatment utilizing plunger lift delivery system |
| 09/28/2006 | WO2006069247A3 Method and apparatus for fluid bypass of a well tool |
| 09/26/2006 | CA2400973C Downhole surge pressure reduction and filtering apparatus |
| 09/19/2006 | CA2367559C Inflatable packer setting tool assembly |
| 08/29/2006 | US7096950 Combined milling and scraping tool |
| 08/23/2006 | EP1693548A2 Method and apparatus for treating a well |
| 08/23/2006 | EP1693547A2 Method and apparatus for well testing |
| 08/22/2006 | US7093657 Earth loop installed with sonic apparatus |
| 08/03/2006 | WO2006079659A1 Method of installing an expandable tubular in a wellbore |
| 08/03/2006 | WO2006040147A3 An injection apparatus for injecting an activated fluid into a well-bore and related injection method |
| 08/03/2006 | US20060169463 Downhole tool with actuable barrier |
| 07/25/2006 | US7080686 Devices and methods for extraction, transportation and/or release of material |
| 07/20/2006 | WO2006076330A1 Finger boot basket |
| 06/07/2006 | CN1258637C Tracer release method for monitoring fluid flow in well |
| 05/11/2006 | WO2006048210A1 Method and apparatus for well treatment |
| 05/11/2006 | CA2585061A1 Method and apparatus for well treatment |
| 05/10/2006 | CN2779044Y Bailing tub for deep water well |
| 05/09/2006 | US7040395 Apparatus and method for debris in a well bore |
| 05/04/2006 | WO2006020206A3 Coiled tubing conveyed milling |
| 05/03/2006 | EP1653043A1 Method and apparatus for well treatment |
| 05/03/2006 | EP1653042A1 An injection apparatus for injecting an activated fluid into a well-bore and related injection method |
| 04/25/2006 | US7032692 Drilling device for earth drill |
| 04/20/2006 | CA2582941A1 An injection apparatus for injecting an activated fluid into a well-bore and related injection method |
| 04/18/2006 | US7028564 Low flow bailer system |
| 04/12/2006 | EP1644671A1 A method of constructing a geothermal heat exchanger |
| 04/12/2006 | EP1295035B1 Isolation container for a downhole electric pump |
| 04/05/2006 | EP1254300B1 Method and apparatus for retrieving equipment from a well |
| 04/04/2006 | US7021388 Fibre optic well control system |
| 04/04/2006 | CA2421712C Methods and apparatus for forming a lateral wellbore |
| 03/23/2006 | US20060060353 Earth loop installed with sonic apparatus |
| 03/21/2006 | CA2210287C Method for injecting fluid into a wellbore |
| 03/15/2006 | EP1635033A1 Self-emptying bailer |
| 03/09/2006 | US20060048935 Casing with isolated annular space |
| 03/01/2006 | EP1232326B1 Device for injecting a fluid into a formation |
| 02/28/2006 | US7004258 Method and apparatus for enhancing oil and gas flow in a well |
| 02/23/2006 | WO2006020206A2 Coiled tubing conveyed milling |
| 02/23/2006 | CA2576432A1 Coiled tubing conveyed milling |
| 02/16/2006 | US20060032634 Downhole surge pressure reduction and filtering apparatus |
| 02/02/2006 | US20060021750 Method and system for injecting a treatment fluid into a well |
| 01/11/2006 | EP1614898A1 Isolation container for a downhole electric pump |
| 12/27/2005 | US6978841 Sand removal and device retrieval tool |
| 12/13/2005 | US6973971 Down hole well cleaning apparatus |
| 11/22/2005 | US6966587 Self-emptying bailer |
| 11/22/2005 | US6966375 Downhole surge pressure reduction and filtering apparatus |
| 11/08/2005 | US6962204 Isolation container for a downhole electric pump |
| 11/08/2005 | US6962198 Groundwater well sample device |
| 10/18/2005 | US6955219 Earth loop installation with sonic drilling |