Issued Patents All Time
Showing 1–25 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10584558 | Downhole packer tool | — | 2020-03-10 |
| 9494014 | Multi-cycle circulating valve assembly | Roger L. Schultz | 2016-11-15 |
| 8596347 | Drillable slip with buttons and cast iron wickers | Anthony Valencia | 2013-12-03 |
| 8408290 | Interchangeable drillable tool | Jesse Cale Porter, William Ellis Standridge, Adam K. Neer, Tracy Martin | 2013-04-02 |
| 8215386 | Downhole tool releasing mechanism | Tracy Martin, Robert Clayton | 2012-07-10 |
| 8191625 | Multiple layer extrusion limiter | Jesse Cale Porter, Adam K. Neer, William Ellis Standridge | 2012-06-05 |
| 8146673 | Method of activating a downhole tool assembly | Matt Howell | 2012-04-03 |
| 7878255 | Method of activating a downhole tool assembly | Matt Howell | 2011-02-01 |
| 7673693 | Hydraulic coiled tubing retrievable bridge plug | William Ellis Standridge, Cleo (John) Clayton Holland | 2010-03-09 |
| 7337852 | Run-in and retrieval device for a downhole tool | Iosif Hriscu, Matthew Todd Howell | 2008-03-04 |
| 7195067 | Method and apparatus for well perforating | Matthew Todd Howell, Don S. Folds | 2007-03-27 |
| 6622554 | Open hole formation testing | Harold W. Nivens, Samuel Bianco, Charles M. MacPhail, Ricardo Maldonado | 2003-09-23 |
| 6236620 | Integrated well drilling and evaluation | Roger L. Schultz, H. Kent Beck, Paul D. Ringgenberg, J. Allan Clark | 2001-05-22 |
| 5597016 | Mechanical lockout for pressure responsive downhole tool | Paul D. Ringgenberg | 1997-01-28 |
| 5558162 | Mechanical lockout for pressure responsive downhole tool | Paul D. Ringgenberg | 1996-09-24 |
| 5518073 | Mechanical lockout for pressure responsive downhole tool | Paul D. Ringgenberg | 1996-05-21 |
| 5482119 | Multi-mode well tool with hydraulic bypass assembly | Curtis E. Wendler | 1996-01-09 |
| 5411097 | High pressure conversion for circulating/safety valve | Paul D. Ringgenberg | 1995-05-02 |
| 5318130 | Selective downhole operating system and method | — | 1994-06-07 |
| 5316087 | Pyrotechnic charge powered operating system for downhole tools | David S. Wesson, Roger L. Schultz | 1994-05-31 |
| 5238070 | Differential actuating system for downhole tools | Roger L. Schultz, Neal G. Skinner | 1993-08-24 |
| 5236048 | Apparatus and method for communicating electrical signals in a well, including electrical coupling for electric circuits therein | Neal G. Skinner, Robert A. Moore, Gregory Albert Kliewer, Roger L. Schultz, Harold Kent Beck +1 more | 1993-08-17 |
| 5220829 | Downhole formation pump | David R. Smith, Harold E. Powers | 1993-06-22 |
| 5193621 | Bypass valve | Paul D. Ringgenberg | 1993-03-16 |
| 5180015 | Hydraulic lockout device for pressure controlled well tools | Paul D. Ringgenberg | 1993-01-19 |