The W2 tubing head spool is WHI�s standard tapered profile that accepts any of the W2 tubing hangers. The units are designed for moderate duty service where ease of operation is desired. Units are available in nominal flange sizes of 7 1/16" and 9" with pressure ratings to 5,000 psi.
W2 tubing head spools are provided with a restricted area packoff in the lower ID profile to isolate annulus pressure and allow for transition to higher pressures in the upper connections. The lower flange connection contains a 1/2" NPT test port, which allows positive testing of annulus seals.
Two 2" LP side outlets are standard on all casing head spools. Other thread sizes, studded side outlets or extended side outlets are also available. Flanged outlets are threaded internally for valve removal control plugs unless otherwise specified.
ID profiles of W2 tubing head spools provide for a guide above the lower connection. Profile diameters are based on API minimum restricted bore calculations for the lightest casing weight. This guide protects wellbore tubulars and directs the tubing string into the open bore during running operations.