초록 ▼

A subsea well has a an outer wellhead housing with a tree on an upper end and a tubing hanger landed in the bore of the tree. A tree cap lands on and is secured to the tree. The tree cap has a plurality of production and annulus valves and a dual-bore control pod assembly. The tree has annulus bypas

A subsea well has a an outer wellhead housing with a tree on an upper end and a tubing hanger landed in the bore of the tree. A tree cap lands on and is secured to the tree. The tree cap has a plurality of production and annulus valves and a dual-bore control pod assembly. The tree has annulus bypass passages which communicate with a tubing annulus on a lower end and upper ports in the tubing hanger on an upper end. Production fluids flow up the tubing hanger bore to the tree cap and circulates through a flowline in the control pod. Access to the tubing annulus is through the annulus passages and tree cap annulus passage to a separate flowline.

대표청구항 ▼

[ I claim:] [20.] A method for completing a subsea well, comprising:(a) providing a tree body having a vertical bore, an external connector profile and an open upper end and positioning the tree body on a wellhead housing on a sea floor at an upper end of a well;(b) providing a tubing hanger having

[ I claim:] [20.] A method for completing a subsea well, comprising:(a) providing a tree body having a vertical bore, an external connector profile and an open upper end and positioning the tree body on a wellhead housing on a sea floor at an upper end of a well;(b) providing a tubing hanger having a production passage and a valve in the production passage, and landing the tubing hanger in the bore of the tree and closing the valve in the tubing hanger;(c) providing a tree cap with a production passage having a production valve;(d) lowering and securing the tree cap onto the tree body;(e) opening the valve in the tubing hanger and the production valve in the tree cap; and then(f) circulating production fluid through the production passage of the tubing hanger and the tree cap to a flowline assembly. [26.] A well production tree comprising:a tree body having a vertical bore therethrough;a tubing hanger landed in the bore and having a vertical production passage in communication with a string of tubing;a tree cap to be affixed to the tree body, the tree cap having a production passage that is in fluid communication with the production passage of the tubing hanger; anda flowline connector mounted to the tree body for engaging a flowline mandrel located adjacent the flowline connector when the tree cap is secured to the tree cap.