Patent ID: 7647974

Claim:
A subsea wellhead assembly, comprising: a tubular housing for location at an upper end of a well; a tubing hanger that lands in the housing for supporting a string of tubing extending into the well; a lower tree member that lands on an upper end of the housing and has an external connector that connects to the housing after the tubing hanger has been installed in the housing, the lower tree member having a bore for receiving well fluid flowing up the string of tubing; at least one valve mounted to the lower tree member for selectively closing the bore, the valve being movable in unison with the lower tree member as it is lowered and landed on the housing; a production line connector mounted to and alongside the lower tree member for connection to a production flow line; an upper tree member that lands on the lower tree member and has an external connector that connects to the lower tree member, the upper tree member having a bore that registers and is coaxial with the bore in the lower tree member for receiving well fluid flowing up the bore of the lower tree member, the bore of the upper tree member having a smaller diameter than a maximum width of the lower tree member, such that the lower tree member cannot pass through the bore of the upper tree member; at least one flow interface device mounted to the upper tree member in communication with the production passage in the upper tree member; and a production line sub carried alongside the upper tree member downstream of and in fluid communication with the production passage, the sub having a lower end that sealingly engages the production line connector.