METHOD FOR RENEWAL OF TIGHTNESS OF OPERATION STRING OF A WELL

摘要

A method for renewal of tightness of operation string of a well through installation of metal structural inserts made of profiled tubes to operation string of a well in the place of its non-tightness with cold expansion. Expansion is carried out to state of fluidity of metal of which the metal structural insert is made, and bringing state of the inner surface of the metal structural insert to soft state. Tightening between the metal structural insert and the operation string is made with polymer composition as hydro-gel ion basis of titanium phosphate, with that one forms protective anti-corrosive layer with polymerization at cold expansion.