| 摘要 |
A hanger for supporting dual tubing strings in a well casing from hanger mandrels which can swivel to facilitate threadedly connecting each mandrel to its associated tubing string. The hanger includes an orienting sleeve for receiving safety shut-off valves, the sleeve being adapted to swivel with respect to the rest of the hanger, making it easier to assemble the hanger onto the running and setting tool used for setting the hanger in the casing. The running and setting tool is releasably secured to the hanger. By imposing fluid pressure on the setting tool, the tubing hanger slips are expanded against the casing. Before the running and setting tool is released from the hanger and retrieved from the well casing, wire line retrievable blanking plugs can be set in the tubing string below the hanger, one plug being inserted in place in one tubing string before the hanger is lowered in the casing, and the other plug lowered through the running tool and hanger to its associated landing nipple in the other tubing string, to maintain the well under control after the running and setting tool is released from the hanger and retrieved at the top of the well bore in which the casing is confined.
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