DESIGN OF WELL Russian patent published in 1998 - IPC

FIELD: oil and gas production industry. SUBSTANCE: this relates to operation of deep inclined oil and gas wells located in permafrost ground. Device has string of casing pipes with perforated holes, string of pump-compressor pipes concentrically inserted in it, circulation valve and packer which is located in annular space between string of pump-compressor pipes and string of casing pipes. Packer is installed above perforated holes. Well is provided with seating nipple which is located in string of pump-compressor pipes under packer with possibility of preventing creation of gas cap under it. It is made with holes and their diameter d₁ is determined from following relation: , where d₂ - inner diameter of above-packer section of pump-compressor pipe string, mm; d₃ - inner diameter of under-packer section of pipe-compressor pipe string, mm; n - number of holes. EFFECT: high efficiency. 1 dwg