Issued Patents All Time
Showing 51–75 of 95 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7946558 | High-pressure plug valve | L. Murray Dallas | 2011-05-24 |
| 7934546 | Fracturing head with replaceable inserts for improved wear resistance and method of refurbishing same | L. Murray Dallas | 2011-05-03 |
| 7922216 | High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same | L. Murray Dallas, Danny Lee Artherholt | 2011-04-12 |
| 7921923 | Casing mandrel for facilitating well completion, re-completion or workover | — | 2011-04-12 |
| 7905293 | Hybrid wellhead system and method of use | L. Murray Dallas | 2011-03-15 |
| 7886833 | System and method for low-pressure well completion | L. Murray Dallas | 2011-02-15 |
| 7828053 | Multipart frac head with replaceable components | Danny Lee Artherholt | 2010-11-09 |
| 7789133 | Erosion resistant frac head | — | 2010-09-07 |
| 7743856 | Slip spool assembly and method of using same | L. Murray Dallas, Irwin Rosenhauch | 2010-06-29 |
| 7721808 | Hybrid wellhead system and method of use | L. Murray Dallas | 2010-05-25 |
| 7708079 | Multi-lock adapters for independent screwed wellheads and methods of using same | L. Murray Dallas | 2010-05-04 |
| 7708061 | Cup tool, cup tool cup and method of using the cup tool | Danny Lee Artherholt | 2010-05-04 |
| 7703205 | Method of refurbishing a high-pressure plug valve | L. Murray Dallas | 2010-04-27 |
| 7654585 | High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same | L. Murray Dallas, Danny Lee Artherholt | 2010-02-02 |
| 7650936 | Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use | L. Murray Dallas | 2010-01-26 |
| 7628201 | Fracturing head with replaceable inserts for improved wear resistance and method of refurbishing same | L. Murray Dallas | 2009-12-08 |
| 7604050 | Wellhead and control stack pressure test plug tool | L. Murray Dallas | 2009-10-20 |
| 7604058 | Casing mandrel for facilitating well completion, re-completion or workover | — | 2009-10-20 |
| 7516786 | Wellhead and control stack pressure test plug tool | L. Murray Dallas | 2009-04-14 |
| 7506660 | Gate valve with replaceable inserts and method of refurbishing same | L. Murray Dallas | 2009-03-24 |
| 7484776 | High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same | L. Murray Dallas, Danny Lee Artherholt | 2009-02-03 |
| 7481239 | Gate valve with replaceable inserts | L. Murray Dallas | 2009-01-27 |
| 7481269 | Hybrid wellhead system and method of use | L. Murray Dallas | 2009-01-27 |
| 7475721 | Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use | L. Murray Dallas | 2009-01-13 |
| 7428931 | Multi-lock adapters for independent screwed wellheads and methods of using same | L. Murray Dallas | 2008-09-30 |