API 6A wellhead equipment tubing head and tubing spool

Tubing head is a body with two flange that can supports the tubing string on a oilwell, seals off the pressure between the casing and tubing annulus, and connect with tubing adapter on the top.

Tubing Head &tubing spool are a straight bore bowl with 45° landing shoulder design which avoids damage to sealing areas by drilling tools, and provides wedging of the tubing hangers, bowl protectors and test plugs. the secondary seal for the last casing pipe can be an integrated "OO" seal type or the plastic injection type, but also accepts reducer bushings "4-O" and "PE" (Pressure Energized).The upper flange is supplied with lockdown screws for packoff tubing hanger retention. The lower flange includes a grease fitting and orifice for testing of the secondary seal.