Patents
US 11933112 B2: Hydraulically powered centralizer device for borehole and method
- Granted
- 2024-03-19
- Filed
- 2021-06-01 application 17335351
- Type
- Utility · 14 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A centralizing device is configured to centralize/decentralize an associated tool in a well. The centralizing device includes a body that extends along a longitudinal axis X, the body having a bore that extends from one end to another end of the body; a first piston shaped as a cylinder and provided around a central portion of the body; a second piston shaped as a cylinder and provided around the central portion of the body; a bridge provided around the central portion of the body, between the first and second pistons; and a pair of arms, each arm being attached with one end to a corresponding one of the first and second pistons and with another end to each other. The second piston, the bridge, and the central portion of the body define a sealed chamber, which is sealed from the ambient.
Source: PVGPATDIS, file of 2026-04-10 (ipg240319.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 |
|---|---|---|---|---|
| Dennis Roessler | Fort Worth, TX | 31 | 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 | E21B17/1021 | 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 |
|---|---|---|---|---|---|
| 2026-01-29 | Security interest Security interest Security interest | OIL STATES ENERGY SERVICES, L.L.C. signed 2026-01-28 OIL STATES INDUSTRIES, INC. signed 2026-01-28 GEODYNAMICS, INC. signed 2026-01-28 TEMPRESS TECHNOLOGIES, INC. signed 2026-01-28 | WELLS FARGO BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT SAN ANTONIO, TX | 74532/194 | PASDL, file of 2026-10-15 |
| 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.