Wellhead assembly

Details Wellhead assembly Wellhead assembly

E - Fixed Constructions

21

B

E21B 33/06 (2006.01) E21B 33/03 (2006.01) E21B 33/047 (2006.01) E21B 33/068 (2006.01)

Patent

CA 2197584

The tubing head adapter, blow-out preventer ("BOP") housing and flow tee of a wellhead Christmas tree are integrated to provide a unitary, integral structure forming a vertical bore. From the bottom up, the structure comprises: a tubing head adapter bottom connection, studded or flanged, for connecting with the flanged top connection of the tubing head; a BOP housing forming side openings communicating with the bore, for receiving the ram components of a blow-out preventer; a flow tee section forming at least one side opening communicating with the bore, for producing well fluid; and a tubing head adapter top connection for connecting with the balance of the Christmas tree. By incorporating the BOP housing and flow tee into the tubing head adapter and eliminating threaded connections, the length of the three components can be reduced up to 50% and structural strength is improved.

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