METHOD FOR PUMPING IN WELL Russian patent published in 1996 - IPC

FIELD: pumping in horizontal wells. SUBSTANCE: critical zone is isolated above productive strata. The isolating is carried out prior to opening the productive strata. Filter-tail and development string are lowered into the well. filter-tail cavity is closed by lintel. filter-tail and development string are lowered individually. Filter-tail is lowered first. Profile pipes are lower together with the filter-tail. Upper part of the filter-tail is secured by the pipes. Development string first is lowered to the cavity of profile pipes. The pipes are lowered so to form a gap between lower end of the development string, walls of profile pipes and lintel. Then the development string achieves upper end of the filter- tail. This operation is carried out after pumping in mortar. Then they wait until the mortar gets hard. Then the lintel is broken. EFFECT: higher reliability. 2 cl, 4 dwg