METHOD FOR PROFILED SHUTTER INSTALLATION IN WELL Russian patent published in 2007 - IPC E21B29/10 

FIELD: oil and gas production industry, particularly to isolate troublesome zones during well drilling.

SUBSTANCE: method involves sealing lower end of profiled shutter having the same shape as profiled pipe section before profiled pipe section connection or providing profiled shutter with check valve; air-tightly mechanically connecting upper shutter end having the same shape as profiled pipe sections with straightening tool; lowering the shutter in lost circulation zone; straightening thereof by pressure application and expanding the shutter to provide tight air-tight pressing thereof to well wall. Profiled pipe section has the first end shaped as pipe converging towards edge thereof and provided with transversal grooves on outer surface thereof, as well as the second end made as pipe diverging towards pipe edge and provided with transversal grooves on inner surface thereof. Profiled pipe sections are connected with each other by air-tight mechanical fitting of outer converging end of one pipe section into inner diverging end of another pipe section. Ring is put on the connection area.

EFFECT: increased quality and reliability of shutter installation, reduced costs.

3 dwg