Bidirectional piston seals with pressure compensation
US10480298B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2017 |
| Grant date | Nov 19, 2019 |
| Priority date | — |
| Expiry date | May 17, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/132
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electric submersible pumping system for use in pumping fluids from a wellbore includes a motor, a pump driven by the motor, and a fluid expansion module connected to the motor. The fluid expansion module includes a piston seal housing and a piston assembly contained within the piston seal housing. The piston assembly includes a piston body having an exterior surface, a plurality of seals connected to the exterior surface of the piston body and a pressure equalization system. The pressure equalization system reduces a pressure differential between fluid in an annular space between the plurality of seals and fluid surrounding the first piston assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.