Patent ID: 6688386
Filing Date: 2004-02-10
Classification: E21B

Abstract:
A tubing hanger assembly for use in a tubing head of a production well, and which provides for passage of production fluids from the production tubing mounted therebelow, through a central bore in the tubing head and through the tubing hanger assembly, while also providing isolation of the production tubing from an electrical power cable which passes through the tubing hanger assembly, said tubing hanger assembly comprising:a generally cylindrical tubing hanger member adapted to seat in a landing seat in the tubing head, and to seal against the central bore; a tubing head adapter adapted to be fastened above the tubing head so as to enclose the tubing hanger member in a sealed relationship therebetween; the tubing head adapter and the tubing hanger member together forming two aligned, parallel spaced ports extending therethrough to provide a tubing port, which connects to the production tubing and permits passage of production fluids, and a cable port through which the electrical power cable extends; the tubing hanger member forming a seat in the cable port; a cylindrical tubing seal-off nipple adapted to connect and seal the tubing port in each of the tubing head adapter and the tubing hanger member; a cylindrical cable seal-off nipple adapted to seat against the seat in the cable port, and to connect and seal the cable port in each of the tubing head adapter and the tubing hanger member; a first seal below the cable seal-off nipple for sealing between the electrical power cable and the cable port in the tubing hanger member; a second seal above the cable seal-off nipple for sealing between the electrical power cable and the cable port in the tubing head adapter; whereby, the tubing seal-off nipple and the cable seal-off nipple when sealed in the tubing and cable ports, provide isolation of the production tubing from the cable port and the electrical power cable held therein.