Patents
US 9464504 B2: Enhancing delaying in situ gelation of water shutoff systems
- Granted
- 2016-10-11
- Filed
- 2011-05-06 application 13102053
- Type
- Utility · 23 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Gel compositions include a high molecular weight water-soluble acrylamide polymer, a crosslinking system capable of crosslinking the polymer, a crosslink delay system and an aqueous solvent. The gel compositions are prepared at the surface and injected into a zone of a formation assessable by a wellbore to form a continuous single-phase gel. The gel compositions may be tailored to a specific formation by predetermining gelation rate, gel strength and/or gel stability to form gels having predetermined properties suitable for the zone.
Source: PVGPATDIS, file of 2026-04-10 (ipg161011.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Lubrizol oilfield Solutions, Inc. 6 patents | US company or organization | Wickliffe, OH | LUBRIZOL OILFIELD SOLUTIONS, INC. State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Sarkis R. Kakadjian | San Antonio, TX | 36 | PVGPATDIS, file of 2026-04-10 | |
| Frank Zamora | San Antonio, TX | 47 | 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 | E21B33/138 | PVGPATDIS, file of 2026-04-10 |
| C09K | Materials for miscellaneous applications, not provided for elsewhere | C09K8/5083 | 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 |
|---|---|---|---|---|---|
| 2016-09-12 | Assignment Assignment of assignor's interest | KAKADJIAN, SARKIS R signed 2011-05-05 ZAMORA, FRANK signed 2011-05-05 | CLEARWATER INTERNATIONAL, LLC HOUSTON, TX | 39705/121 | ECORSEXC, file of 2026-09-25 |
| 2015-10-09 | Assignment Assignment of assignor's interest | CLEARWATER INTERNATIONAL, L.L.C. signed 2015-08-04 | LUBRIZOL OILFIELD SOLUTIONS, INC. WICKLIFFE, OH | 36822/379 | 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.