Wireline clean-out tool having improved capacity

Downhole tool string assembly comprising:

• a wireline;
• a wireline clean-out tool comprising:
• a first opening and a second opening being provided at or near a free-end portion of the wireline clean-out tool, wherein the first opening is for taking in said debris from the wellbore, and the second opening is for ejecting fluid into the wellbore;
• a housing defining a first flow path running from the first opening at the free-end portion to an opposite end portion of the housing, and a second flow path running from the opposite end portion to the second opening at the free-end portion, wherein said flow paths are coupled with each other at the opposite end portion;
• a collection chamber provided in the first flow path for collecting said debris during operational use of the wireline clean-out tool,
• a progressive cavity pump having a hollow rotor, wherein the progressive cavity pump is placed inside the housing at a predefined distance from the free-end portion configured for operating on the first flow path while the hollow rotor forms part of the second flow path;
• and
• the wireline clean-out tool being connected to the wireline.