METHOD OF WELL CEMENTING Russian patent published in 2003 - IPC

FIELD: cementing of water oil and gas wells; applicable in well completion in process of drilling, or performance of well repair for control of sand carried out of poorly cemented and noncemented producing formations. SUBSTANCE: method includes lowering of production string with filter into well; pumping out of well and simultaneous formation of gravel packing and supply of cement mortar to annular space. Gravel packing is formed in annular space in filter zone. Level of gravel packing shall exceed dynamic level of pumped out fluid. Interval of nonfilled part between lower end of casing string and gravel packing level is at least 2 m high. EFFECT: reliable isolation and segregation of producing formations. 1 ex