Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5348089 | Method and apparatus for the multiple stage cementing of a casing string in a well | John T. Brandell, Lee W. Stepp | 1994-09-20 |
| 5318118 | Cup type casing packer cementing shoe | — | 1994-06-07 |
| 5279370 | Mechanical cementing packer collar | John T. Brandell | 1994-01-18 |
| 5277253 | Hydraulic set casing packer | Richard L. Giroux, Anthony M. Badalamenti | 1994-01-11 |