A dowhole pumping assembly and a downhole system
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Applicant
Welltec A/S
Representative
Hoffmann Dragsted A/S
Application number
EP13173705A1
Kind
A1
Document number
2818631
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A dowhole pumping assembly and a downhole system

2818631 - EP13173705A1 - EPO

Application Jun 26, 2013 - Publication Dec 31, 2014

Ricardo Reves Vasques

Abstract

The present invention relates to a downhole pumping assembly for being introduced in a well inside a casing and submerged in well fluid, the downhole pumping assembly extending in a longitudinal direction and being adapted for connection with a wireline. The downhole pumping assembly comprises a pump section comprising a tubular pump housing providing a pump chamber, an inlet provided in the tubular pump housing, the inlet being in fluid communication with the pump chamber, a first valve which is a one-way valve for opening and closing the inlet, a plunger slidingly disposed in the pump chamber, a pump rod operably connected to the plunger and extending from the plunger through the tubular pump housing, an outlet provided in the tubular pump housing, the outlet being in fluid communication with the pump chamber, a second valve which is a one-way valve for controlling a flow of fluid through the outlet. The downhole pumping assembly further comprises a linear actuator arranged in association with the tubular pump housing for driving the pump rod, whereby, when the downhole pumping assemblyis at least partially submerged into the well fluid, well fluid is drawn into the tubular pump housing through the inlet and expelled through the outlet in the tubular pump housing, and the pump section further comprises at least one sealing element for isolating a first part of the casing from a second part of the casing.

Description

Claims

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