Patents
US 10844662 B2: Mud-lubricated bearing assembly with lower seal
- Granted
- 2020-11-24
- Filed
- 2018-11-07 application 16182796
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A mud-lubricated bearing section including a seal assembly for directing a fluid flowing through a mud-lubricated bearing into a central bore of a mandrel. At least one mud-lubricated bearing is positioned in an annular space between the mandrel and a housing. The seal assembly directs the fluid from the annular space through a mandrel fluid port into the mandrel central bore. The seal assembly seals the annular space, and includes a piston, a plug, and a chamber between the piston and the plug. The piston is configured for axial movement relative to the mandrel and the housing, while the plug is axially fixed relative to the mandrel and/or the housing. The chamber is configured to contain a lubricating fluid. The piston includes inner and outer seals. The plug includes a lower seal and a passage allowing the fluid from the chamber to reach the lower seal for lubrication.
Source: PVGPATDIS, file of 2026-04-10 (ipg201124.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Rival Downhole Tools LC 11 patents | US company or organization | Houston, TX | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Gunther HH von Gynz-Rekowski | Conroe, TX | 42 | PVGPATDIS, file of 2026-04-10 | |
| William Christian Herben | Magnolia, TX | 11 | PVGPATDIS, file of 2026-04-10 | |
| Noah Elaia Crawford Daoust | Richmond, TX | 1 | 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 | E21B4/003 | PVGPATDIS, file of 2026-04-10 |
| F16C | Shafts; flexible shafts; elements or crankshaft mechanisms; rotary bodies other than gearing elements; bearings | F16C19/10 | 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 |
|---|---|---|---|---|---|
| 2025-03-12 | Release of security interest Release of security interest | BANC OF CALIFORNIA F/K/A PACIFIC WESTERN BANK D/B/A PACIFIC WESTERN BUSINESS FINANCE signed 2025-03-12 | RIVAL DOWNHOLE TOOLS LLC HOUSTON, TX | 70484/567 | ECORSEXC, file of 2026-09-25 |
| 2022-10-28 | Security interest Security interest Security interest | RIVAL DOWNHOLE TOOLS LLC signed 2022-10-13 | PACIFIC WESTERN BANK D/B/A PACIFIC WESTERN BUSINESS FINANCE PHOENIX, AZ | 61586/149 | ECORSEXC, file of 2026-09-25 |
| 2019-05-06 | Assignment Assignment of assignor's interest | ASHMIN HOLDING LLC signed 2019-04-26 | RIVAL DOWNHOLE TOOLS LC HOUSTON, TX | 49094/110 | ECORSEXC, file of 2026-09-25 |
| 2019-01-03 | Assignment Assignment of assignor's interest | CRAWFORD DAOUST, NOAH ELAIA signed 2018-11-19 HERBEN, WILLIAM CHRISTIAN signed 2018-11-19 VON GYNZ-REKOWSKI, GUNTHER HH signed 2018-11-19 | ASHMIN HOLDING LLC HOUSTON, TX | 47893/438 | 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.