Issued Patents All Time
Showing 51–68 of 68 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8511375 | Wellbore cleaning devices | Lisa L. Posevina, Paul L. Connell | 2013-08-20 |
| 8387700 | Wellbore debris cleanout assembly and method to remove debris from a debris catcher | — | 2013-03-05 |
| 8356671 | Tool with multi-size ball seat having segmented arcuate ball support member | Jeremy J. Guillory, Daniel R. Hart | 2013-01-22 |
| 8353349 | Retaining and isolating mechanisms for magnets in a magnetic cleaning tool | Larry T. Palmer, Jonathan F. Nelson | 2013-01-15 |
| 8336626 | Downhole magnetic retrieval devices with fixed magnetic arrays | Larry T. Palmer, Paul L. Connell, Jonathan F. Nelson | 2012-12-25 |
| 8118101 | Ball catcher with retention capability | Jonathan F. Nelson | 2012-02-21 |
| 7934559 | Single cycle dart operated circulation sub | Lisa L. Posevina | 2011-05-03 |
| 7703533 | Shear type circulation valve and swivel with open port reciprocating feature | Thomas M. Ashy | 2010-04-27 |
| 7562703 | Annular flow shifting device | Larry T. Palmer, Steve Rosenblatt | 2009-07-21 |
| 7513303 | Wellbore cleanup tool | — | 2009-04-07 |
| 6851472 | Convertible tubular scraper | James McNicol | 2005-02-08 |
| 6805197 | Hydraulic wireline cutter | Kenneth A. Brumley, John P. Davis, David B. Haughton | 2004-10-19 |
| 6763753 | Hydraulic wireline cutter | Kenneth A. Brumley, John P. Davis, David B. Haughton | 2004-07-20 |
| 6607031 | Screened boot basket/filter | Gerald D. Lynde | 2003-08-19 |
| 5598895 | Cutter assembly having a plurality of independently rotatable cutting units thereon | Llewellan Anderson | 1997-02-04 |
| 5363930 | Dual-diaphragm lubricant compensator for earth-boring bits | — | 1994-11-15 |
| 5199510 | Raise boring head and stem assembly method | John Michael Stanley | 1993-04-06 |
| 4832135 | Flow through raise boring bit | Howard J. Walk | 1989-05-23 |