FIELD: oil and gas production.
SUBSTANCE: procedure consists in disassembly of production tree of control equipment - CE together with sub spool of tube head -TH; lifting string is extracted from well. A cement bridge is set in a flow string. The case of the TH is disassembled, upper and middle parts of a zero branch are cut off and a cut off part is removed. The HS (head spool) is set on an end of the remained section of the zero branch, a wedge suspension is disconnected and the HS is removed from the wellhead. A sub for matching a conductor and the zero branch is screwed on the conductor; the conductor and the zero branch have different diametres. The wedge suspension is installed into the HS and there is installed the TH. The lifting spring is installed in the well. Production tree of the CE is mounted on the sub spool of the TH.
EFFECT: increased serviceability.
2 dwg
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