Compact wellhead equipment for dual production tubing strings

The production tubing head has been designed to accommodate the hanger suspending the dual production tubing strings. The Model „H” and „R” production tubing hangers are independently acting but have the same design.

When placing (coiling) the R--string the top of the H-hanger is protected against any damage by using a protective hood. The double production tubing hanger has a double „P” seal to ensure sealing between the two hangers and in the annulus. The „P” seals may be plasticized through the plasticizing holes found in the upper flange of the production tubing head. The plastic material shall flow along a forced path to the space behind the bottom „P” seal.


Typical technical data of the dual production wellhead equipment:


Nominal pressure:                                                           2000, 3000, 5000 psi

Size of production tubing:                                              2 3/8” EU; 3 1/2” New VAM

Distance between center lines of the two strings:     2 3/8” (90,1 mm); 3 1/2” (128,2 mm)

Main and pistoning gate valves:                                    2x2 1/16”–3000 psi

Compact wellhead equipment for dual production tubing strings

Additional sizes are available upon request.
DKG VALVE reserves the right to change the Specifications without notice!