Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5377750 | Sand screen completion | Henry L. Restarick, James E. Spangler | 1995-01-03 |
| 5339895 | Sintered spherical plastic bead prepack screen aggregate | James E. Spangler | 1994-08-23 |
| 5318119 | Method and apparatus for attaching well screens to base pipe | William M. Lowry, James E. Spangler | 1994-06-07 |
| 5310000 | Foil wrapped base pipe for sand control | Holley M. Cornette | 1994-05-10 |
| 5293935 | Sintered metal substitute for prepack screen aggregate | James E. Spangler | 1994-03-15 |
| 5190102 | Sintered metal substitute for prepack screen aggregate | James E. Spangler, Thomas V. Malorzo | 1993-03-02 |
| 5088554 | Sintered metal sand screen | James E. Spangler | 1992-02-18 |
| 5004049 | Low profile dual screen prepack | — | 1991-04-02 |
| 4770336 | Well screen centralizer and method for constructing centralizer and for joining of well screens | James E. Spangler | 1988-09-13 |
| 4681161 | Well screen centralizer and method for constructing centralizer and for joining of well screens | James E. Spangler | 1987-07-21 |