| 摘要 |
A running tool is used to install a shoulder ring within a groove located in a wellhead housing after the wellhead housing has been installed. The running tool has a locator member which lands on a locator shoulder. A carrier collet which carries the shoulder ring. A retainer sleeve retracts the shoulder ring during the running in procedure. After the locator member lands on the locator shoulder, the operator strokes a piston. This moves the carrier collet and shoulder ring downward relative to the retainer sleeve, allowing the shoulder ring to expand out into the grooves. A cam surface forces the lower end of the collet to a contracted outer diameter, allowing retrieval of the running tool.
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