Subsea wellhead equipment

For use in a horizontal tree,

• a spool having
• a vertical bore therethrough and
• an elongate opening having a fluid passageway therein connecting at one end with the bore and adapted to be connected at its other end with a remote source of pressure fluid,
• a tubing hanger adapted to be lowered into a landed position within the bore of the spool and having
• a vertical bore from which a tubing string may be suspended within a well bore, and
• an elongate opening having a fluid passageway therein connecting at one end with the outer diameter of the hanger and at its other end with a fluid responsive downhole function within the wellbore, and adapted to be oriented into a rotational position, when the hanger is landed in the spool bore, in which the one end of its fluid passageway is at least approximately axially aligned with the one end of the fluid passageway in the spool,
• the one end of each fluid passageway having a flat seal surface engageable with a flat seal surface of the one end of the other fluid passageway in order to fluidly connect the passageways when so aligned,
• the axes of the fluid passageways forming an acute vertical angle with respect to one another and the flat seal surfaces lying within parallel planes perpendicular to the axes, and
• one of the seal surfaces being resiliently urged inwardly toward the other and thus positioned to be engaged by and then cammed outwardly by the other seal surface as the hanger is lowered into landed position.

For use in a horizontal tree,

• a spool having
• a vertical bore therethrough and
• an elongate opening having a fluid passageway therein connecting at one end with the bore and adapted to be connected at its other end with a remote source of pressure fluid,
• a tubing hanger adapted to be lowered into a landed position within the bore of the spool and having
• a vertical bore from which a tubing string may be suspended within a well bore, and
• an elongate opening having a fluid passageway therein connecting at one end with the outer diameter of the hanger and at its other end with a fluid responsive downhole function within the wellbore, and adapted to be oriented into a rotational position, when the hanger is landed in the spool bore, in which the one end of its fluid passageway is at least approximately axially aligned with the one end of the fluid passageway in the spool,
• the one end of each fluid passageway having a flat seal surface engageable with a flat seal surface of the one end of the other fluid passageway in order to fluidly connect the passageways when so aligned,
• the seal surface of the spool being formed on the inner end of a compressible bellows which is closely received and releasably mounted in the opening in the spool.