Inventor · disambiguated record
Douglas J. Lehr
Also filed as: LEHR DOUGLAS J · LEHR DOUGLAS JULIUS
29 granted patents·5 pending applications·1,560 citations·filing 1988–2017
97Inventor score
Top patents by PatentIndex Score
34 records- 0197US7163066B2Gravity valve for a downhole toolBJ SERVICES CO·Filed 2004·Granted Jan 16, 2007·82 cites·31 claims
- 0296US6491108B1Drillable bridge plugBJ SERVICES CO·Filed 2000·Granted Dec 10, 2002·208 cites·68 claims
- 0395US7475736B2Self centralizing non-rotational slip and cone system for downhole toolsBJ SERVICES CO·Filed 2006·Granted Jan 13, 2009·97 cites·30 claims
- 0494US7600572B2Drillable bridge plugBJ SERVICES CO·Filed 2006·Granted Oct 13, 2009·125 cites·7 claims
- 0592US6708768B2Drillable bridge plugBJ SERVICES CO·Filed 2002·Granted Mar 23, 2004·95 cites·38 claims
- 0691US9284803B2One-way flowable anchoring system and method of treating and producing a wellSTONE PATRICK C·Filed 2013·Granted Mar 15, 2016·30 cites·20 claims
- 0790US7255178B2Drillable bridge plugBJ SERVICES CO·Filed 2003·Granted Aug 14, 2007·152 cites·35 claims
- 0890US6708770B2Drillable bridge plugBJ SERVICES CO·Filed 2002·Granted Mar 23, 2004·81 cites·189 claims
- 0989US9650853B2Downhole cutting and jacking systemBAKER HUGHES INC·Filed 2015·Granted May 16, 2017·6 cites·19 claims
- 1088US8839874B2Packing element backup systemBISHOP DAVID S·Filed 2012·Granted Sep 23, 2014·15 cites·21 claims
- 1186US6315041B1Multi-zone isolation tool and method of stimulating and testing a subterranean wellFiled 1999·Granted Nov 13, 2001·167 cites·31 claims
- 1286US6006838AApparatus and method for stimulating multiple production zones in a wellboreBJ SERVICES CO·Filed 1998·Granted Dec 28, 1999·159 cites·29 claims
- 1385US6414905B1Method and apparatus for communicating coded messages in a wellboreBAKER HUGHES INC·Filed 1996·Granted Jul 2, 2002·104 cites·41 claims
- 1484US8910722B2Slip-deployed anti-extrusion backup ringBISHOP DAVID S·Filed 2012·Granted Dec 16, 2014·9 cites·9 claims
- 1583US6578633B2Drillable bridge plugBJ SERVICES CO·Filed 2001·Granted Jun 17, 2003·51 cites·74 claims
- 1683US5579283AMethod and apparatus for communicating coded messages in a wellboreBAKER HUGHES INC·Filed 1993·Granted Nov 26, 1996·76 cites·40 claims
- 1782US9080416B2Setting tool, anchoring and sealing device and systemXU YINGQING·Filed 2012·Granted Jul 14, 2015·7 cites·18 claims
- 1880US10100634B2Devices and methods to communicate information from below a surface cement plug in a plugged or abandoned wellBAKER HUGHES INC·Filed 2015·Granted Oct 16, 2018·3 cites·22 claims
- 1976US10119350B2Expandable junk millBAKER HUGHES A GE CO LLC·Filed 2016·Granted Nov 6, 2018·2 cites·17 claims
- 2076US9273526B2Downhole anchoring systems and methods of using sameBAKER HUGHES INC·Filed 2013·Granted Mar 1, 2016·5 cites·13 claims
- 2165US7854268B2Deep water hurricane valveBJ SERVICES COMPANY LLC·Filed 2007·Granted Dec 21, 2010·8 cites·22 claims
- 2264US5931229AThrough tubing gravel pack system and method of gravel packingBJ SERVICES CO·Filed 1997·Granted Aug 3, 1999·49 cites·43 claims
- 2357US9284814B2Downhole tool with remotely actuated drag blocks and methodsBAKER HUGHES INC·Filed 2013·Granted Mar 15, 2016·1 cites·37 claims
- 2451US2007290454A1Encapsulated back-up system for use with seal systemBJ SERVICES CO·Filed 2007·Application pending·0 cites
- 2546US9422966B2Shear member post shear segment retention apparatusBAKER HUGHES INC·Filed 2013·Granted Aug 23, 2016·0 cites·22 claims
- 2645US2006232019A1Encapsulated back-up system for use with seal systemGARRISON HUBERT F·Filed 2005·Application pending·0 cites
- 2744US9915126B2High pressure circulating shoe track with redundant pressure isolation featureBAKER HUGHES INC·Filed 2015·Granted Mar 13, 2018·0 cites·21 claims
- 2844US4872510ASubterranean well casing float toolBAKER HUGHES INC·Filed 1988·Granted Oct 10, 1989·16 cites·11 claims
- 2940US10550666B2Slow response time toolFISHER BRITAIN A·Filed 2017·Granted Feb 4, 2020·0 cites·18 claims
- 3040US4953622ASubterranean well casing float toolBAKER HUGHES INC·Filed 1989·Granted Sep 4, 1990·12 cites·7 claims
- 3136US2008066917A1Annular fracturing combo service toolBJ SERVICES CO·Filed 2006·Application pending·0 cites
- 3236US2007151722A1Deformable release device for use with downhole toolsLEHR DOUGLAS J·Filed 2006·Application pending·0 cites
- 3336US2008006407A1Annular fracturing service tool systemLEHR DOUGLAS J·Filed 2006·Application pending·0 cites
- 3431US8714271B2Multi-purpose fill and circulate well toolLEHR DOUGLAS JULIUS·Filed 2011·Granted May 6, 2014·0 cites·22 claims
Join the waitlist — get patent alerts
Get an alert when Douglas J. Lehr files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →