DOUBLE-PURPOSE DOWNHOLE TOOL Russian patent published in 2019 - IPC E21B27/02 E21B49/08 

FIELD: soil or rock drilling; mining.

SUBSTANCE: group of inventions relates to a multifunctional well downhole tool, a borehole system, a sampling method and a method for discharging a pressure jet. Multifunctional downhole cable-lowering tool for sampling a fluid and discharging a pressure fluid jet in a well comprises a pump having a pump opening, and a fluid chamber for sampling a fluid or storing a fluid to be discharged by a pressure jet. Chamber for fluid medium has the first end of the chamber connected to the hole of the pump, and the second end of the chamber having a chamber opening. Fluid chamber has a chamber wall and comprises: a first piston and a second piston dividing the fluid chamber into a first chamber section, a second chamber section and a third chamber section, wherein the first piston is connected to the first end of the first piston rod, and the second piston is connected to the first end of the rod of the second piston; a first support configured to support the first piston rod; second support configured to support second piston rod; and a first spring located between the first piston and the first support, and another first spring located between the second piston and the second support. When the pump creates a pressure drop on the pistons, the pistons move in one direction so that the first springs force is activated and the fluid can flow from one chamber section to the other chamber section.

EFFECT: technical result consists in the possibility of performing several operations without the need to lift the tool to the surface for re-equipment.

15 cl, 12 dwg