Model CFZ-A Hydraulic Stage Collar 
Model CFZ-A Hydraulic Stage Collar
Features /
1.The circulation ports can be hydraulically opened, eliminating the need to use a free-fall opening plug. Therefore, the hydraulic stage collar can be used in deviated and horizontal wells.
2.Retaining mechanism prevents pre-mature opening.
3.Anti-rotation mechanism improves drill-out efficiency.
Technical Parameters /

Size

Sealing capacity

Casing weight

Opening pressure

Closing pressure

in

mm

MPa

lb/ft

mm

MPa

MPa

5 1/2

139.7

35/50

17.00

7.72

17-19

5

20.00

9.17

7

177.8

35/50

26.00

9.19

29.00

10.36

32.00

11.51

35.00

12.65

7 5/8

193.7

35/50

29.70

9.52

33.70

10.92

39.00

12.70

9 5/8

244.5

35/50

40.00

10.03

43.5

11.05

47.00

11.99

53.50

13.84