The tubing heads are used to suspend and to seal the tubings with 2 ⅜ in (60,3 mm), 3 ½ in (88,9 mm), 2 ⅞ in (73 mm) si 4 ½ in (114,3 mm) diameters.
The Tubing heads consist of a flanged spool in which a tubing hanger is suspended, locked by a special nut or by lock-down screws.
The tubing hanger is provided with a special thread for mounting – dismounting of back-pressure valves or test plugs.
The tubing flanges are provided with a seat for secondary seal of casing. The flanges and side outlets are in accordance with API Spec. 6A
About Material class and Temperature classification, see Appendix A.
in x PSI
in x PSI
|Tubing head type||D1,
|11 x 2,000||7 1/16 x 2,000||X||–||20||2,81||14||2,19|
|11 x 3,000||7 1/16 x 3,000||X||X||21,5||3,06||15||2,5|
|11 x 3,000||7 1/16
|11 x 5,000||X||X||23||4,69||15,5||3,62|
|7 1/16 x 5,000||7 1/16
|9 x 10,000||X||–||21,75||4,88||18,88||4,06|
|11 x 10,000||X||X||25,75||5,56||18,88||4,06|
|7 1/16 x 15,000||–||X||19,88||4,69||18,88||4,06|