Single string hanger system

Details Single string hanger system Single string hanger system

1976-07-12

1977-10-04

Leppink, James A.

Wells

With below and above ground modification

Above ground actuating means for below ground device

166334, E21B 712

Patent

active

040518949

ABSTRACT:
Apparatus for adjusting the distance between a lower tubing hanger anchored in a well casing to support a depending lower tubing string, and an upper tubing hanger at the well head, in which an adjustable spacer device has its lower end connected to the lower tubing hanger and its upper end to the lower end of a safety valve connected to an upper tubing string extending to the upper tubing anchor, the valve being controlled hydraulically by fluid under pressure imparted through a control line strapped, or otherwise secured, to the upper tubing string and extending from the top of the well to the safety valve. The upper tubing string, safety valve and control line, as well as the upper portion of the spacer, are rotatable as a unit with respect to the lower portion of the spacer to lower the unit relative to the lower tubing hanger until the upper tubing hanger lands on its well head seat, such action occurring without twisting the control tubing relative to the safety valve.

REFERENCES:
patent: 3154145 (1964-10-01), Brown
patent: 3494417 (1970-02-01), Fredd
patent: 3653435 (1972-04-01), Reistle et al.
patent: 3770053 (1973-11-01), Martin et al.
patent: 3861463 (1975-01-01), Crowe
patent: 3955621 (1976-05-01), Webb

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