METHOD OF CONDUCTION, FIXATION AND DEVELOPMENT OF MULTIDIRECTIONAL WELL Russian patent published in 2010 - IPC E21B7/06 

FIELD: oil-and-gas production.

SUBSTANCE: method includes conduction of main bore - its drilling, fixation of it by pipes, drilling of additional bores with its following fixation by tails with usage of detachable deflectors for sealing of main and additional bores and well development. According to the invention, main shaft is at first drilled up to top of producing formation with set of zenith angle and it is fixed. Then it is deepened it in thickness of producing stratum with fixation by expanded pipes and its development is implemented. Then from main bore it is implemented contiguous drilling, fixation and development of additional bores from bottom to top in the range of the same producing stratum. Additionally for insulation of drilled beforehand and developed bores from following additional bores detachable deflector, is re-installed in main bore in the drilling process, fixation and development from the bottom to the top, and fixation of additional bores by tails is implemented without its inlet into main bore.

EFFECT: increasing of extractive properties of well ensured by increasing of opening surface of stratum, extension of well drainage area and keeping of collecting properties of stratum.

4 dwg