Inventor · disambiguated record
Andrew Duggan
Also filed as: DUGGAN ANDREW · DUGGAN ANDREW MICHAEL
14 granted patents·5 pending applications·182 citations·filing 2002–2024
92Inventor score
Files withWEATHERFORD LAMB8BAKER HUGHES OILFIELD OPERATIONS LLC4DUGGAN ANDREW4DUGGAN ANDREW MICHAEL1HEWLETT PACKARD DEVELOPMENT CO1
Top patents by PatentIndex Score
19 records- 0192US7578043B2Coupling tubularsWEATHERFORD LAMB·Filed 2006·Granted Aug 25, 2009·53 cites·25 claims
- 0274US11326411B2Thermal activation of liner hanger for elastomer-less completionDUGGAN ANDREW·Filed 2019·Granted May 10, 2022·2 cites·12 claims
- 0372US11142999B2Downhole power generation using pressure differentialDUGGAN ANDREW·Filed 2019·Granted Oct 12, 2021·1 cites·20 claims
- 0465US12492615B2Energy harvester, method and systemBAKER HUGHES OILFIELD OPERATIONS LLC·Filed 2023·Granted Dec 9, 2025·0 cites·22 claims
- 0565US7255177B2Tubing expansionWEATHERFORD LAMB·Filed 2004·Granted Aug 14, 2007·24 cites·71 claims
- 0663US7367389B2Tubing expansionWEATHERFORD LAMB·Filed 2004·Granted May 6, 2008·22 cites·6 claims
- 0763US7357189B2SealWEATHERFORD LAMB·Filed 2004·Granted Apr 15, 2008·29 cites·79 claims
- 0859US7066259B2Bore isolationWEATHERFORD LAMB·Filed 2002·Granted Jun 27, 2006·21 cites·34 claims
- 0957US7798223B2Bore isolationWEATHERFORD LAMB·Filed 2006·Granted Sep 21, 2010·5 cites·28 claims
- 1056US11891875B2Expandable annular seal tool and systemDUGGAN ANDREW·Filed 2022·Granted Feb 6, 2024·0 cites·16 claims
- 1150US7086477B2Tubing expansion toolWEATHERFORD LAMB·Filed 2003·Granted Aug 8, 2006·12 cites·31 claims
- 1250US2025260343A1Energy extraction arrangement, method, and systemBAKER HUGHES OILFIELD OPERATIONS LLC·Filed 2024·Application pending·0 cites
- 1349US2025092763A1Energy harvester arrangement, method and systemBAKER HUGHES OILFIELD OPERATIONS LLC·Filed 2023·Application pending·0 cites
- 1449US2025105763A1Energy harvester, method, and systemBAKER HUGHES OILFIELD OPERATIONS LLC·Filed 2023·Application pending·0 cites
- 1547US7111680B2Bore-lining tubing and method of useWEATHERFORD LAMB·Filed 2003·Granted Sep 26, 2006·9 cites·76 claims
- 1642US11280162B2Power generation using pressure differential between a tubular and a borehole annulusDUGGAN ANDREW·Filed 2018·Granted Mar 22, 2022·0 cites·20 claims
- 1736US2021162763A1Fluid ejection inter-module gapHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Application pending·0 cites
- 1835US8746028B2Tubing expansionDUGGAN ANDREW MICHAEL·Filed 2004·Granted Jun 10, 2014·4 cites·70 claims
- 1934US2004017081A1Coupling tubularsFiled 2003·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →