Annulus porting of horizontal tree

Details Annulus porting of horizontal tree Annulus porting of horizontal tree

1997-12-23

2000-04-18

Dang, Hoang

Wells

Submerged well

Wellhead

166 861, 166 881, 166 884, 166 951, 166348, E21B 33043

Patent

active

060503394

ABSTRACT:
A horizontal tree has a vertical bore and a horizontal production passage and is landed in a wellhead housing. A tubing hanger lands in the bore and has a vertical passage and a horizontal passage that aligns with that of the tree. A retrievable first plug seals the vertical passage. A tree cap seals in the tree bore above the tubing hanger and has an axial passage. A retrievable second plug seals the tree cap passage. A vent port extends laterally through the tree cap between its axial passage and outer surface. A pair of seals on the second plug seal above and below the vent port. A tubing annulus passage communicates with the vent port and an annulus passage. The second plug serves as a second pressure barrier to the first plug and blocks the vent port. The annulus passage is sealed from communication with a void between the plugs.

REFERENCES:
patent: 5372199 (1994-12-01), Cegielski et al.
patent: 5544707 (1996-08-01), Hopper et al.
patent: 5575336 (1996-11-01), Morgan
patent: 5868204 (1999-02-01), Pritchett et al.
patent: 5884706 (1999-03-01), Edwards

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