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Pulse mini

Purpose

The Pulse mini jet pump is designed to induce flow from the formation for well survey and near-wellbore impact, and in particular for fields with abnormally low formation pressures and high (up to 1 Darsi) formation permeability.

Design possibilities

Pulse mini allows you to carry out the following technological operations:

Reduction of bottomhole pressure and stimulation of inflow from the formation;
Geophysical surveys in the mode of set values of depressions by geophysical instruments on a 28 millimeter diameter logging cable;
Multi-cycle hydrodynamic studies from lower to higher depressions with registration of bottomhole pressure with autonomous gauges
Impact on formations with small-sized devices not exceeding 28 mm in diameter (acoustic radiators, heaters, etc.) in depression modes;

These operations can be carried out in any combination and sequence.

Principle of operation

The device allows you to create depressions on formations without the use of compressor units.
The principle of operation eliminates the possibility of explosive gas-air mixtures and uncontrolled oil and gas manifestations in the well.
Reduces bottomhole pressure only in the sub-packer interval. The rest of the wellbore maintains normal hydrostatic pressure.
As a working fluid for device, a fluid used for well killing (water, saline solution, surfactant solution) is used.

Specifications

Maximum working fluid pressure when working with a fixed cable, MPa

21

Maximum working fluid pressure when working with a movable cable, MPa

18

Maximum depth of descent, m

4000

The overall dimensions of the device enclosure:

Maximum diameter, mm

92

Length, mm

553

Passing channel diameter, mm

37

Maximum diameter of functional inserts moved along the tubing in the interval from the wellhead to the installation site of the device body, mm

40

Time to failure, not less than, hour

48

Warranty resource, hour

100

Resource when taking out mech. impurities, no more than, m3

40

Average recovery time (preparation for work), hour

5

The ratio of the hydrostatic pressure decrease in the under-packer space to the pressure of the working fluid measured at the wellhead, not less than, % (provided that the inflow from the reservoir does not exceed 20 m3 / day and the gas factor does not exceed 60 m3/m3 )

100

Service