Dual / Quad Flapper Check Valves

Features

Our Dual and Quad Flapper Safety Valves are a safety component housed in the bottom hole assembly (BHA) that prevents well fluids and gas from returning up the coil tubing. These valves increase our factor of safety significantly at minimal additional cost.

Benefits

  • Quad flapper provides four barriers in a single housing
  • Allows for use of a 15/16” ball
  • Utilizes Viton seals and O-rings for compatibility with harsh fluids.
  • Cartridges are pressure tested and certified by lot for compliance to pressure limits
  • Large thru bore for use with drop ball type subs and balls, darts or wiper plugs
  • Robust and Dependable design completely manufactured “in-house” by WOS
  • Rebuilt and pressure tested by trained WOS personnel
  • Inspected by qualified WOS Inspection Team
  • High strength, two-piece replaceable alloy valve cartridges
  • Redundant (dual or quad) valve system for increased reliability
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Dual / Quad Flapper Check Valves

About This Product

Dual / Quad Flapper Check Valves

The flappers, housed in a sub, provide a unidirectional check valve that allows operators to pump fluid down through the coil tubing while preventing return flow. The flappers ensure a positive seal for continuous safety during operations. If back pressure occurs, flappers swing up to create seal and block downhole fluid and gas. The flapper lids are spring loaded in the closed position, ensuring the valves actuate if backpressure occurs.

Product Details

Tool Size, in 1-11/16 2-1/8 2-7/8 2-7/8 3-1/8 3-1/8 3-1/2
Series 170 213 288-DF 288-QF 313-DF 313-QF 350-DF
Max OD, in 1.70 2.13 2.88 2.88 3.13 3.13 3.50
Min ID, in 0.70 0.94 or 1.02 0.94 or 1.02 0.94 or 1.02 0.94 or 1.02 0.94 or 1.02 0.94 or 1.02
Overall Tool Length, in 15.50 16.38 17.29 22.79 17.92 23.29 19.77
Shoulder to Shoulder Length, in 14.00 14.51 15.04 20.54 15.04 20.42 16.89
Torsional Yield, ft-lbs 700 1,630 3,770 3,770 5,760 5,760 5,950
Top Connection 1 AM MT Box 1-1/2 AM MT Box 2-3/8 PAC Box 2-3/8 PAC Box 2-3/8 REG Box 2-3/8 REG Box 2-3/8 REG Box
Bottom Connection 1 AM MT Pin 1-1/2 AM MT Pin 2-3/8 PAC Pin 2-3/8 PAC Pin 2-3/8 REG Pin 2-3/8 REG Pin 2-3/8 REG Pin
Tensile Yield, lbf 60,880 114,500 194,670 194,670 282,600 282,600 282,560