Hydraulic-mechanical release device (HRD)

Characteristics NKT-73-F
External diameter 89
Length, max, mm 393
Drift diameter D, mm 47
Maximum bearing capacity, t 20
Maximum torque transmitted via AFH from tubing to PKO, N x m 2000
Pin shear pressure g/cm2 30
Resource of tripping operations 1
Weight, kg 9.21
Ball diameter, mm 56

JSC “BVT” sells a product of its own design - a hydraulic-mechanical release device designed to release the perforation system into the well after shooting. In addition, the product triggers perforation assemblies conveyed on tubing with a diameter of at least 62 mm.

The device is used during BPO in vertical and inclined wells filled with oil, water or other flushing fluids. When developing the HRD, BVT engineers paid particular attention to the fail-safe operation of the device.

The release device works as follows:

  • The perforation system is triggered (by drop bar/ball).
  • If necessary, the ball is not dropped into the hole, after that the perforation system is removed from the well.
  • Otherwise, after the ball is dropped, the perforation system is released. Later, geophysical exploration of wells and/or hydraulic fracturing is possible.

Release devices manufactured by JSC “BVT” are used by leading mining companies in Russia and are characterized by high efficiency and maximum reliability.