Inventor · disambiguated record
Lance D. Underwood
Also filed as: UNDERWOOD LANCE · UNDERWOOD LANCE D
47 granted patents·8 pending applications·1,833 citations·filing 1983–2023
98Inventor score
Files withSMITH INTERNATIONAL24BISN TEC LTD4HALLIBURTON CO3HALLIBURTON ENERGY SERV INC3HYPERSCIENCES INC3
Top patents by PatentIndex Score
55 records- 0198US7353845B2Inline bladder-type accumulator for downhole applicationsSMITH INTERNATIONAL·Filed 2006·Granted Apr 8, 2008·75 cites·14 claims
- 0298US5332048AMethod and apparatus for automatic closed loop drilling systemHALLIBURTON CO·Filed 1992·Granted Jul 26, 1994·376 cites·26 claims
- 0397US7513318B2Steerable underreamer/stabilizer assembly and methodSMITH INTERNATIONAL·Filed 2006·Granted Apr 7, 2009·88 cites·23 claims
- 0496US8627901B1Laser bottom hole assemblyUNDERWOOD LANCE D·Filed 2010·Granted Jan 14, 2014·62 cites·53 claims
- 0596US6309195B1Internally profiled stator tubeHALLIBURTON ENERGY SERV INC·Filed 1998·Granted Oct 30, 2001·99 cites·7 claims
- 0696US5318138AAdjustable stabilizerHALLIBURTON CO·Filed 1992·Granted Jun 7, 1994·210 cites·35 claims
- 0796US4836307AHard facing for milled tooth rock bitsSMITH INTERNATIONAL·Filed 1987·Granted Jun 6, 1989·99 cites·8 claims
- 0895US5171139AMoineau motor with conduits through the statorSMITH INTERNATIONAL·Filed 1991·Granted Dec 15, 1992·99 cites·4 claims
- 0994US8662160B2Systems and conveyance structures for high power long distance laser transmissionDEWITT RONALD A·Filed 2011·Granted Mar 4, 2014·30 cites·32 claims
- 1093US7506703B2Drilling and hole enlargement deviceSMITH INTERNATIONAL·Filed 2006·Granted Mar 24, 2009·48 cites·11 claims
- 1193US5318137AMethod and apparatus for adjusting the position of stabilizer bladesHALLIBURTON CO·Filed 1992·Granted Jun 7, 1994·166 cites·34 claims
- 1292US11536111B2Downhole tool deployment assembly with improved heater removability and methods of employing suchBISN TEC LTD·Filed 2018·Granted Dec 27, 2022·5 cites·31 claims
- 1392US6568076B2Method of making an internally profiled stator tubeHALLIBURTON ENERGY SERV INC·Filed 2001·Granted May 27, 2003·52 cites·4 claims
- 1491US9562395B2High power laser-mechanical drilling bit and methods of useGRUBB DARYL L·Filed 2012·Granted Feb 7, 2017·18 cites·52 claims
- 1591US9482223B2Apparatus and method for controlling or limiting rotor orbit in moving cavity motors and pumpsJARVIS BRIAN P·Filed 2012·Granted Nov 1, 2016·8 cites·14 claims
- 1691US9027668B2Control system for high power laser drilling workover and completion unitZEDIKER MARK S·Filed 2012·Granted May 12, 2015·22 cites·14 claims
- 1791US4944774AHard facing for milled tooth rock bitsSMITH INTERNATIONAL·Filed 1989·Granted Jul 31, 1990·60 cites·23 claims
- 1890US11624235B2Ram accelerator augmented drilling systemHYPERSCIENCES INC·Filed 2021·Granted Apr 11, 2023·3 cites·20 claims
- 1990US11401776B2Downhole operations relating to open hole gravel packs and tools for use thereinBISN TEC LTD·Filed 2017·Granted Aug 2, 2022·4 cites·15 claims
- 2090US5857531ABottom hole assembly for directional drillingHALLIBURTON ENERGY SERV INC·Filed 1997·Granted Jan 12, 1999·141 cites·19 claims
- 2189US9611846B2Flow restrictor for a mud motorSMITH INTERNATIONAL·Filed 2015·Granted Apr 4, 2017·3 cites·10 claims
- 2288US9915106B2U-joint for a downhole motor drive shaftSMITH INTERNATIONAL·Filed 2014·Granted Mar 13, 2018·9 cites·21 claims
- 2387US9695638B2Positive displacement motor with radially constrained rotor catchSMITH INTERNATIONAL·Filed 2012·Granted Jul 4, 2017·5 cites·26 claims
- 2486US9334691B2Apparatus and method for controlling or limiting rotor orbit in moving cavity motors and pumpsJARVIS BRIAN P·Filed 2011·Granted May 10, 2016·12 cites·25 claims
- 2584US7735581B2Locking clutch for downhole motorSMITH INTERNATIONAL·Filed 2007·Granted Jun 15, 2010·25 cites·22 claims
- 2683US10036232B2Systems and conveyance structures for high power long distance laser transmissionFORO ENERGY INC·Filed 2013·Granted Jul 31, 2018·4 cites·97 claims
- 2783US9982485B2Positive displacement motor with radially constrained rotor catchSMITH INTERNATIONAL·Filed 2016·Granted May 29, 2018·3 cites·26 claims
- 2879US8640792B2Flexible directional drilling apparatus and related methodsUNDERWOOD LANCE D·Filed 2010·Granted Feb 4, 2014·5 cites·28 claims
- 2978US10612542B2Apparatus and method for controlling or limiting rotor orbit in moving cavity motors and pumpsSMITH INTERNATIONAL·Filed 2016·Granted Apr 7, 2020·1 cites·18 claims
- 3075US8776915B2Locking clutch for downhole motorBEYLOTTE JAMES EDMOND·Filed 2008·Granted Jul 15, 2014·5 cites·22 claims
- 3174US7861802B2Flexible directional drilling apparatus and methodSMITH INTERNATIONAL·Filed 2006·Granted Jan 4, 2011·12 cites·15 claims
- 3272US11988072B1Projectile drilling systemHYPERSCIENCES INC·Filed 2023·Granted May 21, 2024·0 cites·20 claims
- 3371US9393648B2Undercut stator for a positive displacment motorUNDERWOOD LANCE D·Filed 2010·Granted Jul 19, 2016·5 cites·5 claims
- 3470US7597158B2Drilling and hole enlargement deviceSMITH INTERNATIONAL·Filed 2008·Granted Oct 6, 2009·9 cites·41 claims
- 3565US9187955B2Locking clutch for downhole motorSMITH INTERNATIONAL·Filed 2014·Granted Nov 17, 2015·1 cites·22 claims
- 3664US10450800B2Bearing/gearing section for a PDM rotor/statorCLOUZEAU FRANCOIS·Filed 2012·Granted Oct 22, 2019·2 cites·20 claims
- 3763US8783361B2Laser assisted blowout preventer and methods of useZEDIKER MARK S·Filed 2011·Granted Jul 22, 2014·2 cites·58 claims
- 3863US8651202B2Percussion drilling assembly having a floating feed tubeSWADI SHANTANU·Filed 2011·Granted Feb 18, 2014·2 cites·9 claims
- 3962US4711311AVibration and erosion resistant nozzleSMITH INTERNATIONAL·Filed 1986·Granted Dec 8, 1987·27 cites·10 claims
- 4060US7343989B2Secondary retainer for a downhole hammer bitSMITH INTERNATIONAL·Filed 2005·Granted Mar 18, 2008·5 cites·11 claims
- 4159US11634966B2Combined well plug/chemical heater assemblies for use in down-hole operations and associated heater cartridgesBISN TEC LTD·Filed 2017·Granted Apr 25, 2023·0 cites·5 claims
- 4257US7267185B2Bit retainer systemSMITH INTERNATIONAL·Filed 2004·Granted Sep 11, 2007·18 cites·27 claims
- 4357US2018328150A1Oilfield laser operations using high power long distance laser transmission systemsFORO ENERGY INC·Filed 2018·Application pending·0 cites
- 4455US7665548B2Secondary retainer for a downhole hammer bitSMITH INTERNATIONAL·Filed 2008·Granted Feb 23, 2010·3 cites·4 claims
- 4554US12123278B2Plug with composite ends and method of forming and usingBISN TEC LTD·Filed 2021·Granted Oct 22, 2024·0 cites·14 claims
- 4651US2014116785A1Turbodrill Using a Balance DrumTOWNER DANIEL·Filed 2013·Application pending·0 cites
- 4748US7950475B2Percussion drilling assembly having a floating feed tubeSMITH INTERNATIONAL·Filed 2008·Granted May 31, 2011·2 cites·6 claims
- 4847US2020180018A1Die casting system for amorphous alloysCORNERSTONE INTELLECTUAL PROPERTY LLC·Filed 2017·Application pending·0 cites
- 4944US4501338AGrease pump for sealed bearing rotary cone rock bitsSMITH INTERNATIONAL·Filed 1983·Granted Feb 26, 1985·8 cites·8 claims
- 5043US2020056277A1Method of making non-galling parts using amorphous metal surfacesLIQUIDMETAL COATINGS LLC·Filed 2017·Application pending·0 cites
Showing the top 50 of 55 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →