Method and apparatus for servicing a wellhead assembly

Details Method and apparatus for servicing a wellhead assembly Method and apparatus for servicing a wellhead assembly

1995-12-11

1997-07-22

Dang, Hoang C.

Wells

Processes

Repairing object in well

166 57, 166 851, 166 901, 166302, E21B 2300

Patent

active

056495943

ABSTRACT:
A method and apparatus for servicing a Christmas tree on a completed well as set forth. It incorporates a tub or bucket which fits around the casing below the Christmas tree. With the use of chilled liquid in the tub, a cold temperature region is created. A chilled water supply is connected through a flexible injection line, injection orifice, and is sprayed into the Christmas tree to flow downwardly through the chilled region. And ice plug is formed on the interior of the pipes defining the casing and production tubing strings. Ice is formed from the exterior to the interior, thereby plugging the well and enabling servicing.

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