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Downhole sealing
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Patent number 11,802,462
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Issue date Oct 31, 2023
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Churchill Drilling Tools Limited
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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Downhole apparatus and methods
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Patent number 11,293,264
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Issue date Apr 5, 2022
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Churchill Drilling Tools Limited
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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Downhole sealing
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Patent number 11,187,059
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Issue date Nov 30, 2021
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Churchill Drilling Tools Limited
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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Downhole sealing and actuation
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Patent number 10,590,737
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Issue date Mar 17, 2020
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Churchill Drilling Tools Limited
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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Downhole tool
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Patent number 10,458,204
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Issue date Oct 29, 2019
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Churchill Drilling Tools Limited
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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Downhole tool
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Patent number 10,267,107
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Issue date Apr 23, 2019
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Churchill Drilling Tools Limited
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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Drill string check valve
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Patent number 10,088,064
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Issue date Oct 2, 2018
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Churchill Drilling Tools Limited
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Andrew Churchill
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E21 - EARTH DRILLING MINING
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Drill string check valve
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Patent number 9,920,583
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Issue date Mar 20, 2018
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Churchill Drilling Tools Limited
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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Downhole apparatus
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Patent number 9,828,818
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Issue date Nov 28, 2017
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Churchill Drilling Tools Limited
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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Downhole material delivery
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Patent number 9,593,545
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Issue date Mar 14, 2017
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Churchill Drilling Tools Limited
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Andrew Churchill
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E21 - EARTH DRILLING MINING
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Downhole tool
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Patent number 9,453,379
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Issue date Sep 27, 2016
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Churchill Drilling Tools Limited
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Andrew Churchill
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E21 - EARTH DRILLING MINING
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Downhole tool
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Patent number 8,899,335
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Issue date Dec 2, 2014
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Churchill Drilling Tools Limited
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Andrew Churchill
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E21 - EARTH DRILLING MINING
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Top filling tubing
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Patent number 7,975,766
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Issue date Jul 12, 2011
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Churchill Drilling Tools Limited
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Andrew Phillip Churchill
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E21 - EARTH DRILLING MINING
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Drifting tubing
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Patent number 7,828,060
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Issue date Nov 9, 2010
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Churchill Drilling Tools Limited
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Andrew Churchill
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E21 - EARTH DRILLING MINING
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Downhole tool
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Patent number 7,766,084
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Issue date Aug 3, 2010
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Churchill Drilling Tools Limited
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Andrew Phillip Churchill
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Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
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Drifting tubing
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Patent number 7,472,749
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Issue date Jan 6, 2009
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Churchill Drilling Tools Limited
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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DOWNHOLE SEALING
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Publication number 20220081995
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Publication date Mar 17, 2022
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CHURCHILL DRILLING TOOLS LIMITED
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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DOWNHOLE APPARATUS AND METHODS
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Publication number 20210131225
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Publication date May 6, 2021
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CHURCHILL DRILLING TOOLS LIMITED
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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DOWNHOLE SEALING
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Publication number 20180291707
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Publication date Oct 11, 2018
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CHURCHILL DRILLING TOOLS LIMITED
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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DOWNHOLE SEALING AND ACTUATION
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Publication number 20180163509
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Publication date Jun 14, 2018
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CHURCHILL DRILLING TOOLS LIMITED
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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DOWNHOLE TOOL
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Publication number 20170037707
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Publication date Feb 9, 2017
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CHURCHILL DRILLING TOOLS LIMITED
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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DOWNHOLE TOOL
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Publication number 20160369593
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Publication date Dec 22, 2016
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CHURCHILL DRILLING TOOLS LIMITED
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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DRILL STRING CHECK VALVE
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Publication number 20160032669
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Publication date Feb 4, 2016
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CHURCHILL DRILLING TOOLS LIMITED
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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DOWNHOLE APPARATUS
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Publication number 20150136416
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Publication date May 21, 2015
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CHURCHILL DRILLING TOOLS LIMITED
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING
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DRILL STRING CHECK VALVE
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Publication number 20140332277
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Publication date Nov 13, 2014
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CHURCHILL DRILLING TOOLS LIMITED
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Andrew Churchill
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E21 - EARTH DRILLING MINING
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DOWNHOLE TOOL
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Publication number 20120125629
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Publication date May 24, 2012
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Churchill Drilling Tools Limited
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Andrew Churchill
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E21 - EARTH DRILLING MINING
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DOWNHOLE TOOL
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Publication number 20120111576
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Publication date May 10, 2012
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Churchill Drilling Tools Limited
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Andrew Churchill
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E21 - EARTH DRILLING MINING
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DOWNHOLE MATERIAL DELIVERY
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Publication number 20120073828
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Publication date Mar 29, 2012
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Churchill Drilling Tools Limited
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Andrew Churchill
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E21 - EARTH DRILLING MINING
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Drifting tubing
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Publication number 20060102348
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Publication date May 18, 2006
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Churchill Drilling Tools Limited
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Andrew Philip Churchill
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E21 - EARTH DRILLING MINING