Patent ID: 8616287

Claim:
An apparatus for improving the safety and recovery of wells to be installed in oil wells comprising: a Deep Set Well Head (DSWH), situated at a first depth, configured to terminate underlying casings used for construction of the well and including disconnection and reconnection system with extension casings or risers for connecting with with the well head; a Casing Receptacle housing a Deep Set Tubing Hangar (DSTH) and including a first interface for housing the DSTH; a plurality of second interfaces for providing a sealing between the DSTH and the Casing Receptacle; and a third interface for connection to a production casing or riser; the DSTH including: at least two passages for production tubing and for annulus tubing; hydraulic connections and passages for control of Sub Surface Safety Valves (SSSVs); a fourth interface for extension elements to the well head which allows for disconnection and subsequent reinstallation of the extension elements; a fifth interface for housing seals inside the Casing Receptacle; and a blocking system on the Casing Receptacle based on radially movable dog elements, which are configured to be activated by pressurizing a hydraulic device; and extension elements between the DSTH and the well head are configured to connect the production tubing to a surface well head, and connect the SSSVs to the well head via Control lines, the extension elements including: connection interfaces with the DSTH to allow for disconnection and subsequent re-connection of the DSTH to the well head; and a plurality of expansion joints.