Patents
US 11920442 B2: Select fire switch form factor system and method
- Granted
- 2024-03-05
- Filed
- 2021-05-25 application 17329881
- Type
- Utility · 18 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A wellbore select fire switch retaining member system and method with an integrated through wire and ground wire in a switch sub. The system/method includes a retaining member that has a form factor acceptable by a conventional switch sub. The retaining member incorporates an electrical connection to the center pin of a pressure switch. The system further includes a secondary piston aligned with a piston in the switch (switch piston) so that external pressure is fully acted upon the entire switch piston creating a reliable switch connection. Another system includes an integrated retaining member and switch module having a form factor compatible with existing switch subs. The integrated module inputs include a ground wire and a through wire and the outputs include a ground wire, through wire and an arming wire.
Source: PVGPATDIS, file of 2026-04-10 (ipg240305.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| GEODYNAMICS, INC. 140 patents | US company or organization | Millsap, TX | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| John T. Hardesty | Fort Worth, TX | 91 | PVGPATDIS, file of 2026-04-10 | |
| James A. Rollins | Lipan, TX | 30 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| E21B | Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells | E21B43/1185 | PVGPATDIS, file of 2026-04-10 |
| F42D | Blasting | F42D1/04 | PVGPATDIS, file of 2026-04-10 |
| F42B | Explosive charges, e.g. for blasting, fireworks, ammunition | F42B3/00 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2022-03-10 | Security interest Security interest Security interest | GEODYNAMICS, INC. signed 2022-03-07 OIL STATES ENERGY SERVICES, L.L.C. signed 2022-03-07 OIL STATES INDUSTRIES, INC. signed 2022-03-07 | WELLS FARGO BANK, NATIONAL ASSOCIATION ATLANTA, GA | 59861/477 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.