HRD

Hydraulic-mechanical release device (HRD) designed to release perforation assembly in the well after firing it when deploying in NKT (tubing) 73G* and to trigger the shaped charge perforators deployed in the tubing with inner diameter at least of 62 mm (if triggered by ball), and to automatically release perforator to the bottom in vertical and deviated wells with water, oil or other washing fluid.

How it works:

1. PA is triggered (by drop bar/ball).

2. If needed, the ball is not released, and PA is lifted, assembly is recovered from the well.

3. In other case, perforation assembly is released to the bottom after ball release with possibility of further GWL and (or) HFF.

Specifications

Parameter	Value
Thread type	NKT (tubing) 73-G / NKT (tubing) 73-G
External diameter, mm	89
Overall length, mm	393
Weight, kg	9,21
Pressure needed to cut the pins, atm	30
Bearing capacity, maximum, t	20
Torque, maximum, N∙m	2000
Maximum inner drift diameter, maximum, mm	47
Available tripping operations	1

* - different implementation available for NKT (tubing) 60, NKT (tubing) 89