APPARATUS FOR MULTIBOTTOM WELL DRILLING AND PUMPING-IN Russian patent published in 1996 - IPC

FIELD: mining, apparatus is used during drilling and pumping-in of several branch holes in single vertical well. SUBSTANCE: apparatus for multibottom well drilling and pumping-in has casing string of big diameter with shoe and located in casing string multiwell template with holes according to number of branch holes for their drilling and casing pipes landing in them and fixation member of multiwell template in respect to casing string. Apparatus has group of mounted with bottom up cylinders with their bottom holes of different diameter for branch holes casing pipes landing in them. Number of cylinders is equal to number of well branch holes. Multiwell template holes are made inclined. Casing string shoe has stop for multiwell template. Casing string fixation member is made in the form of bulge along whole length of casing string inner surface and groove made on side outer surface of multiwell template and cylinders. EFFECT: improved process. 2 cl, 5 dwg