Assignee
HEARN DAVID D
US·3 granted patents·5 citations·filing 2009–2010
Technology mixE21B3
Top patents by PatentIndex Score
3 records- 0165US8430187B2Directional sidetrack well drilling systemHEARN DAVID D·Filed 2010·Granted Apr 30, 2013·3 cites·14 claims
- 0241US8256535B2Mill-through tailpipe liner exit and method of use thereofHEARN DAVID D·Filed 2009·Granted Sep 4, 2012·2 cites·36 claims
- 0339US9371694B2Permanent bypass whipstock assembly for drilling and completing a sidetrack well and preserving access to the original wellboreHEARN DAVID D·Filed 2010·Granted Jun 21, 2016·0 cites·22 claims
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