Type FZF Float Sub
Model “FZF” Float Sub is a new-style drilling tool inside blowout prevent. During normal drilling, valve open, drilling fluid circulation clearly while down-hole happen to kick or blowout. The valve cap shut off in order to achieve blowout prevention. When tripping in or out, it preventing drilling fluid flowing from back and prevent mud entering into the drill string, realizing the function of preventing block. It is a special tool for preventing blowout and block in drilling operation.
Specifications
| Model | O.D. mm (in) | I.D. mm (in) | Upper joint thread |
Bottom joint thread |
Length mm (in) | Float valve wick code | Max. working pressure MPa | Working conditions |
| FZF89/70-NC26×NC26 | 89(3 1/2) | 31.8 (1 1/4) | NC26 | NC26 | 610 (24) | 1R/70 | 35～70 | petroleum、natural gas、mud |
| FZF95/70-2 3/8PAC×2 3/8PAC | 95(3 3/4) | 31.8(1 1/4) | 2 3/8PAC | 2 3/8PAC | 915(36) | 1R/70 | ||
| FZF105/70-NC31×NC31 | 105(4 1/8) | 54(2 1/8) | NC31 | NC31 | 610(24) | 2F—3R/70 | ||
| FZF121/70-NC38×NC38 | 121(4 3/4) | 51(2 ) | NC38 | NC38 | 610(24) | 3 1/2IF/70 | ||
| FZF127/70-NC38×NC38 | 127(5) | 51(2) | NC38 | NC38 | 610(24) | 3F/70 | ||
| FZF165/70-NC50×NC50 | 165(6 1/2) | 71.4(2 13/16) | NC50 | NC50 | 610(24) | 4R/70II | ||
| FZF172/70-NC50×NC50 | 172(6 3/4) | 71.4(2 13/16) | NC50 | NC50 | 725(24) | 5R/70 | ||
| FZF203/70-6 5/8REG×6 5/8REG | 203(8) | 76.2(3) | 6 5/8REG | 6 5/8REG | 915(36) | 5F—6R/70 | ||
| ：：1R 、1F-2R、2F-3R、3F、4R、4F、5R、5F-6R、6R； 35～70MPa | ||||||||