FIELD: oil and gas industry.
SUBSTANCE: group of inventions relates to a downhole modulator intended for use in a well. The device intended for the well contains an elongated body of the tool, expansible drill rods and a flexible valve membrane. The expansible drill rods are installed on the body so that they can be opened or closed. The membrane is fixed to the expansible drill rods; it is made so that it can slide in between folded and unfolded positions. The valve membrane contains the first convergent section with the first end of the first diameter and the second end of the second diameter. The first diameter is bigger than the second diameter and the inner well diameter. The first convergent section is connected to the expansible drill rods so that a part of the valve membrane is born against the well walls between the first and second diameters. The valve membrane is a tube and the diameter of its one end exceeds the biggest diameter to be sealed. The diameter of the second membrane end is less of the least diameter to be sealed. The above device intended for use in the well can be included into a modulator which beyond this device contains a valve for fluid pressure modulation in the filled well.
EFFECT: eliminating need of modulator being built-in into the well structure as well as elimination of need in a pump or a nozzle.
7 cl, 13 dwg
