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