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HFH

Hydraulic firing head on absolute pressure (HFH) designed for triggering of the whole shaped charge perforator line by JSC «BVT» deployed in tubing and coil tubing.

Specifications and advantages:

  • improved safety of operation provided by the head design;
  • reliable operation provided by the head and percussion initiator design;
  • can be used after continuous exposure to high pressure and temperature.

Allows to perform:

  • tubing conveyed perforation in vertical, horizontal and deviated wells;
  • tubing conveyed perforation of two intervals or of single interval with double density (with additional use of UFH);
  • tubing conveyed perforation with pressure sink on formation;
  • acid treatment, well wash after firing.

 Implementations:

  • drainable - connects tubing and well after firing;
  • non-drainable - keeps the tubing sealed before and after firing.

Specifications of the head with diameter of 53 mm and 73-114 mm

Parameter

Head type

Diameter 53 mm

Diameter 73-114 mm

Drainable

Non-drainable

Percussion mechanism

Drainable

Non-drainable

Drainable

Non-drainable

1

Triggered perforating system

PKO 50-AT

PKO 63-AT – PKO 114-AT*

PKO 63-AT, PKO 73-AT

PKO 89-AT – PKO 114-AT

2

External diameter D, mm

53

76

89

3

Length L, mm

520

460

300

480

410

460

390

4

Weight of the head, kg

5,4

3,7

9,5

5

Weight of blasting explosive, maximum, g

1,0**

1,0**

6

Minimum hydrostatic pressure, MPa

7,2

5,2

7

Maximum hydrostatic pressure, MPa

86

94

8

Pressure to cut a single pin, MPa

3,6 (24 pcs)

2,6 (36 pcs)

9

Maximum pressure exceeding hydrostatic pressure (ref.)

+7 to hydrostatic pressure

10

Maximum temperature in application,  °С

150

150

11

Maximum weight of connected perforating system, t

20

30***

30

12

Available salvos

5 charges

5 charges

13

Type of the tubing

NKT (tubing) 48, coil tubing

NKT (tubing) 60

NKT (tubing) 60


* - assembled with UFH coupling or together with GWL as a percussion mechanism;
 ** - together with DYNAWELL NB HNS 1.4S percussion initiator;
 *** - determined by bearing capacity of UFH or GWL coupling.