Device and method for pumping a viscous liquid comprising injecting a thinning product, application to horizontal wells
US5348094A · kind A · utility
7Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1993 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Jun 14, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/121
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A device for pumping a fluid of high viscosity containing a gas and a liquid phase which includes a pump connected to a lower end of a tubular string at the bottom of a well and a device for separating free gas from the liquid phase and for injecting a thinner into the fluid to reduce the viscosity. Injection of the thinner is effected at fluid inlet ports of an inlet device for separating the free gas via a pipe leading to the surface of a geological formation in which the well is positioned. Also, a pumping method using the device involves injecting the thinner into the fluid of high viscosity near an inlet of the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.