Oilfield pressure pumping system with slow speed and high pressure fracturing fluid output
US11788395B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 2021 |
| Grant date | Oct 17, 2023 |
| Priority date | — |
| Expiry date | Dec 17, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H47/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An oilfield pressure pumping system is configured to perform a preliminary fracturing stage or operation at a high pressure but slow speed before initiating normal fracturing. The oilfield pressure pumping system includes an auxiliary underdrive system that can drive the transmission at a slower input speed that can be provided by an idle speed of the power unit's engine to facilitate different fracturing modes, including a preliminary fracturing mode during a slow speed high pressure preliminary fracturing stage. The auxiliary underdrive system may include a hydrostatic transmission driven by the engine and which drives the transmission at an underdrive speed that would correspond to a sub-idle engine speed driving the transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.