METHOD OF SIMULTANEOUS-SEPARATE OPERATION OF SEVERAL PAYOUT BEDS AND INSTALLATION OF WELL FOR IMPLEMENTATION OF THIS METHOD Russian patent published in 2008 - IPC E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry and can be used for extraction of fluid or gaseous hydrocarbons, particularly in wells with opening of several payout beds. The invention facilitates reduction of capital investments into development of wells for each of their objects, it also facilitates reduction of operation costs and multipay field completion period, increases hydrocarbon yield for longer period and reduces specific losses during well operation. The essence of the invention is as follows: the method includes running down a tail-piece with packers, well chambers and disconnecting units on a pump-compressor pipe column, installation of the tail-piece in the well and operation of the latter. According to the invention the tail-piece is assembled on the pump-compressor pipes - PCP, further first of all a nipple-funnel with a regulator of pressure or consumption with a reverse valve or plug are lowered into the well. Then PCP is lowered with one or several well chambers or bypass sleeves, then the last one or the top of the last is placed at a distance of 2 internal diameters of operating column below the low holes of perforation intervals of a low payout bed. One or several additional well chambers or bypass sleeves are added to PCP. At that this chamber or the lowest of them is placed 2 internal diameters of operating column above the upper holes of perforation interval of the low payout bed. Then the packer of the lower section of the tail-piece is attached to PCP thus completing the assembly of the latter. After that the second and the following of tail-piece sections are assembled and secured depending on the number of payout beds subject to operation. The packer of each section of the tail-piece is installed at the height of not less than 10 meters from the upper holes of the perforation interval of the developed payout bed. Upon installation of the last packer the disconnecting unit is attached and one or several well chambers are arranged above this disconnecting unit on the PCP. The packers are then run into operation, separating the payout beds one from another. Further the operation of the well commences.

EFFECT: facilitates reduction of capital investments into development of wells for each of their objects, it also facilitates reduction of operation costs and multipay field completion period, increases hydrocarbon yield for longer period and reduces specific losses during well operation.

4 cl, 3 dwg