The FG-A Float Collar is run in a casing assembly, usually sev eral joints above the Float Shoe. It serves as an extra back pr essure valve sealing against pressures from blow while runnin g the assembly and after the cementing job. Internal latch and valve are readily drillable. Its capability of back-pressure is over 25MPa.
Like the FG Float Collar, the FX float shoe also has a back-pressure valve to prevent back flow. It permits cement to run through side ports when the nose of the shoe is on the bottom. Inner valve and bottom guides are all made of drillable material. Its capability of back-pressure is over 25MPa.
Specification
Specification, mm | Ф508 | Ф473 | Ф340 | Ф245 | Ф178 | Ф168 |
Positive pressure（MPa） | 30 | 30 | 30 | 30 | 30 | 30 |
Reverse confined（MPa） | 35 | 35 | 35 | 35 | 35 | 35 |
connection | LTC/BTC | LTC/BTC | LTC/BTC | LTC/BTC | LTC/BTC | LTC/BTC |
Max OD(MM) | 534 | 508 | 365 | 270 | 195 | 189 |
Total Length(mm) | 450 | 510 | 350 | 370 | 320 | 320 |
650 | 745 | 515 | 500 | 416 | 416 |
