DH

David Hirth

WE Weatherford/Lamb: 16 patents #38 of 852Top 5%
BH Baker Hughes Holdings: 3 patents #995 of 3,522Top 30%
Schlumberger Technology: 1 patents #3,893 of 7,293Top 55%
Overall (All Time): #221,751 of 4,157,543Top 6%
20
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
10597986 Method and apparatus for bi-directionally anchoring a liner in a borehole Travis Raymond Burke, James Hall, Raghavendar Ranganathan, Srihari Chebolu 2020-03-24
7225870 Hydraulic tools for setting liner top packers and method for cementing liners Gerald Pedersen 2007-06-05
7172029 Bi-directionally boosting and internal pressure trapping packing element system Gerald Pedersen, Tarald Gudmestad 2007-02-06
7165622 Packer with metal sealing element Tarald Gudmestad 2007-01-23
7114573 Hydraulic setting tool for liner hanger Patrick Maguire 2006-10-03
7055611 Plug-dropping container for releasing a plug into a wellbore Gerald Pedersen 2006-06-06
7048055 Packer with integral cleaning device 2006-05-23
6981547 Wire lock expandable connection Patrick Maguire 2006-01-03
6962206 Packer with metal sealing element Tarald Gudmestad 2005-11-08
6920927 Method and apparatus for anchoring downhole tools in a wellbore 2005-07-26
6908121 Locking arrangement for a threaded connector Tarald Gudmestad, Mark J. Murray, Gerald Pedersen 2005-06-21
6902008 Bi-directionally boosting and internal pressure trapping packing element system Gerald Pedersen, Tarald Gudmestad 2005-06-07
6877567 Expansion set liner hanger and method of setting same 2005-04-12
6866100 Mechanically opened ball seat and expandable ball seat Tarald Gudmestad, Gerald Pedersen 2005-03-15
6776228 Ball dropping assembly Gerald Pedersen 2004-08-17
6715541 Ball dropping assembly Gerald Pedersen 2004-04-06
6672384 Plug-dropping container for releasing a plug into a wellbore Gerald Pedersen 2004-01-06
6241023 Unlocking packer setting method and device Christiaan D. Krauss 2001-06-05
6079496 Reduced-shock landing collar 2000-06-27
5944108 Method for multi-lateral completion and cementing the juncture with lateral wellbores John L. Baugh, Douglas J. Murray 1999-08-31