Method of pumping fluid from a wellbore by a subsurface pump having an interior flow passage in communication with a fluid chamber via a filter positioned in a side wall of a plunger
US-11255171-B2 · Feb 22, 2022 · US
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Hebert Douglas patents
Hebert Douglas is listed as an inventor on 6 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Hebert Douglas |
| Total patents | 6 |
| First publication | Apr 26, 2018 |
| Latest publication | Feb 22, 2022 |
Notable patents
Publications ranked by popularity score, then publication date.
Subsurface reciprocating pump for gassy and sandy fluids
US-10450847-B2 · Oct 22, 2019 · US
Well artificial lift operations with sand and gas tolerant pump
US-2019264549-A1 · Aug 29, 2019 · US
Subsurface pump for use in well artificial lift operations having an interior flow passage of a plunger being in communication with a fluid chamber via a filter
US-10385663-B2 · Aug 20, 2019 · US
Subsurface Reciprocating Pump for Gassy and Sandy Fluids
US-2018298736-A1 · Oct 18, 2018 · US
Well artificial lift operations with sand and gas tolerant pump
US-2018112503-A1 · Apr 26, 2018 · US
Recent patents
Latest publications not already listed above.
No data yet.
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Weatherford Tech Holdings Llc | 6 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| F04B53/143 | 6 |
| F04B47/02 | 6 |
| F04B53/20 | 6 |
| E21B43/127 | 6 |
| E21B43/126 | 6 |