PROCESS OF OPENING OF PRODUCTIVE INCLINED SEAM WITH PRESSURE MODE OF PRODUCTION OF HYDROCARBONS Russian patent published in 2001 - IPC

FIELD: drilling of inclined and horizontal holes. SUBSTANCE: zenith angle of shaft is set on roof of productive seam up to 90 degrees in process of drilling, then horizontal sections of shafts of single-face or multiface holes are drilled with inclination angle of 0 degree. As result of analysis of structural map in case of single-face hole horizontal section is drilled in direction perpendicular to outer or inner outline of gas-and-oil or water-and- oil contacts. Length of section is found by calculation. In case of multiface hole length of horizontal section of shaft is also found by calculation and hole is drilled at certain angle formed in plan of seam by axis of each horizontal section with outer or inner outline of gas-and-oil or water-and-oil contacts. EFFECT: improved technological indices in development of deposit, avoidance of expenses related to drilling and running of commercial and estimation holes. 4 dwg