Float Collar & Float Shoe Product Classification

1

Float Collar FG ZX QZ 127mm

Alloy steel (N80) for body; nitrided steel for valve core; EPDM rubber for sealing ring

1. Seal ring wear from abrasive particles in drilling fluid; 2. Valve core jamming due to cement slurry solidification residue

1. Clean the inner cavity thoroughly before installation to remove drilling fluid residues; 2. Use high-quality drilling fluid with solid particle content ≤2% (per API 10D requirements)

2

Float Collar FG ZX QZ 139.7mm

Alloy steel (N80) for body; nitrided steel for valve core; EPDM rubber for sealing ring

1. Body corrosion from downhole H2S/CO2 corrosive media; 2. Valve seat damage from high-pressure cement slurry impact

1. For sour gas wells, select H2S-resistant material grades (per NACE MR0175); 2. Control cement slurry pumping pressure ≤80% of the float collar's rated pressure

3

Float Collar FG ZX QZ 244.5mm

Alloy steel (L80) for body; nitrided steel for valve core; fluororubber for sealing ring

1. Sealing failure due to high-temperature aging of rubber rings (downhole temperature >150°C); 2. Thread damage during casing running

1. Select high-temperature-resistant fluororubber seals for high-temperature wells; 2. Apply thread compound evenly during installation and control make-up torque per API 5CT

4

Float Collar FG ZX QZ 200mm

Alloy steel (N80) for body; nitrided steel for valve core; EPDM rubber for sealing ring

1. Valve core fatigue failure from frequent backflow pressure impacts; 2. Inner cavity wear from sand-laden drilling fluid

1. Avoid repeated pressure testing and backflow operations; 2. Install sand control filters in the drilling fluid circulation system

5

Float Collar FG ZX QZ 273mm

Alloy steel (L80) for body; nitrided steel for valve core; fluororubber for sealing ring

1. Body deformation from downhole external pressure (deep well >3000m); 2. Seal ring damage from chemical additives in cement slurry

1. Verify the float collar's external pressure rating matches well depth requirements; 2. Test compatibility between cement slurry additives and seal materials before use

6

Float Collar FG ZX QZ 127mm TP-FJ

Alloy steel (N80) for body; nitrided steel for valve core; EPDM rubber for sealing ring

1. TP-FJ component damage from improper installation torque; 2. Seal leakage from foreign matter between the sealing surfaces

1. Use torque wrenches to ensure accurate installation torque; 2. Inspect sealing surfaces for cleanliness and intactness before assembly

7

Float Collar FG ZX QZ 244.5mm BTC

Alloy steel (L80) for body; nitrided steel for valve core; fluororubber for sealing ring; BTC thread with copper plating

1. BTC thread corrosion from downhole moisture; 2. Thread leakage due to insufficient make-up torque

1. Protect threads with anti-corrosion caps during storage and transportation; 2. Follow API 5CT thread make-up procedures and verify torque with a torque gauge

8

Float Collar FG ZX FQ 139.7mm

Alloy steel (N80) for body; nitrided steel for valve core; EPDM rubber for sealing ring

1. Valve core jamming due to cement slurry sedimentation; 2. Seal wear from long-term contact with drilling fluid

1. Ensure cement slurry circulation is sufficient to prevent sedimentation; 2. Replace sealing rings if the float collar is stored for more than 6 months

9

Float Collar FG ZX FQ 177.8mm

Alloy steel (N80) for body; nitrided steel for valve core; EPDM rubber for sealing ring

1. Body wear from casing string vibration during running; 2. Valve seat erosion from high-velocity cement slurry

1. Install centralizers to reduce casing vibration; 2. Control cement slurry pumping rate within the recommended range (≤1.2 m³/min)

10

Float Collar FG ZX FQ 273mm

Alloy steel (L80) for body; nitrided steel for valve core; fluororubber for sealing ring

1. Sealing failure from high-pressure cyclic loading; 2. Valve core damage from foreign objects (e.g., casing debris) entering the cavity

1. Conduct pressure cycling tests before downhole use (per API 10D); 2. Clean the casing string thoroughly to remove debris before installing the float collar

1

Float Collar Float Shoe FXFG FZ ZS 139.7mm

Alloy steel (N80) for body; nitrided steel for valve core; EPDM rubber for sealing ring; wear-resistant alloy for float shoe guide head

1. Float shoe guide head wear from contact with wellbore rock formations; 2. Seal leakage between float collar and float shoe connection

1. Inspect wellbore for irregularities before casing running; 2. Ensure tight connection between float collar and float shoe and apply thread sealant

2

Float Collar Float Shoe FXFG FZ FQ 273mm

Alloy steel (L80) for body; nitrided steel for valve core; fluororubber for sealing ring; wear-resistant alloy for float shoe guide head

1. Valve core jamming in both components due to cement slurry solidification; 2. Body corrosion from downhole corrosive media

1. Complete cementing operations within the cement slurry setting time; 2. Select corrosion-resistant materials for sour gas wells (complying with NACE MR0175)

3

Float Collar Float Shoe FXFG FZ QZ 139.7mm

Alloy steel (N80) for body; nitrided steel for valve core; EPDM rubber for sealing ring; wear-resistant alloy for float shoe guide head

1. Float shoe guide head damage from impact with wellbore obstacles; 2. Seal ring aging from high downhole temperature

1. Use a casing shoe guide during running to avoid impact; 2. Select high-temperature-resistant seals for wells with downhole temperature >120°C

4

Float Collar Float Shoe FXFG FZ QZ 177.8mm

Alloy steel (N80) for body; nitrided steel for valve core; EPDM rubber for sealing ring; wear-resistant alloy for float shoe guide head

1. Connection thread damage during casing running; 2. Valve seat erosion from high-velocity drilling fluid

1. Handle with care during transportation and installation to avoid thread collision; 2. Control drilling fluid circulation velocity ≤1.5 m/s