Patent · US Active

Well pump device

US7900695B2 · kind B2 · utility

2Cited by

4References

1Claims

0Family size

Inventor

Tom Unsgaard · Stavanger, NO

Key dates

Filing date	Oct 18, 2005
Grant date	Mar 8, 2011
Priority date	—
Expiry date	Jul 10, 2026

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B43/129
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A well pump device is introduced into a well and connects to a wireline to receive electrical energy from the surface. An electrically driven feed pump connects to and delivers driving fluid to the driving side of an ejector. A hydraulic apparatus uses the well pump device as a pulling tool.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.