Float Valve Sub
Float Valve Sub is an important tool in petroleum exploration and drilling engineering. The float valve sub is connected at upper part of drill bit. The float valve sub is near the bit connecting thread. The float valve sub can also be used at different necessary position of drill string when required. The main application is, when connected with single piece pipe, it prevents mud from coming in and up blocking the hole. When blowout takes place, blowout in drill string will be avoided because nozzle is closed automatically by valve cap of the float valve assembly .
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Detailed Description
Product Overview
Float Valve Sub is an important tool in petroleum exploration and drilling engineering. The float valve sub is connected at upper part of drill bit. The float valve sub is near the bit connecting thread. The float valve sub can also be used at different necessary position of drill string when required. The main application is, when connected with single piece pipe, it prevents mud from coming in and up blocking the hole. When blowout takes place, blowout in drill string will be avoided because nozzle is closed automatically by valve cap of the float valve assembly .
Applications
1.Blowout Prevention: Acts as the primary internal barrier against 90% of blowouts by sealing faster than conventional dart valves.
2. Flowback Mitigation: Blocks cuttings and debris from backflowing into the drillstring during connections, preventing bit nozzle plugging and MWD/LWD tool damage.
Features
1.Sliding Sleeve Isolation: Flapper retracts into a sealed chamber when open, eliminating direct fluid erosion and extending service life.
2. Dual-Trigger Mechanism:
(1) Hydraulic reverse-pressure activation for primary closure.
(2) Spring-assisted reset for redundant sealing.
3. Full-Bore Design: Flow area ≥45 cm² (DN121), near-zero pressure drop, maximizing ROP.
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