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Differential sub
Differential sub

Differential sub

The differential sub (DP-1) is designed to create dynamic pressure sink during application of perforators deployed in tubing in wells filled with water, oil or some other washing fluid. 

Features and advantages:

  • may be applied in vertical and deviated wells that create sink;
  • in the hydrosystem of the well and collector statum;
  • well may be washed through circulating holes, formation fluid enters the tubing after perforation;
  • ceramic membrane withstands high pressure and knocks down into small pieces;
  • ease of assembly/disassembly.


Technical characteristics


Outside diameter, mm


Length, mm


Weight, kg


Maximum allowable hydrostatic pressure in application, MPa


*-the pressure is stated for the convex side; maximum pressure for concave side is 6,8 MPa