COMPLETION METHOD FOR WELL WITH HORIZONTAL SHAFT Russian patent published in 2015 - IPC E21B33/16 E21B43/10 

FIELD: oil and gas industry.

SUBSTANCE: completion method for a well with a horizontal shaft is suggested that includes drilling of the well with the horizontal shaft, running in of a production string to the horizontal part of the well with a stop ring at the end till the thrust into the bottomhole, injection of cement grout to the annular space, the process withhold for the time of the cement hardening, drilling of the stop ring and the well development. At that drilling of the horizontal shaft of a low diameter is made from the casing string using a drilling fluid with a density from 1.20 up to 1.25 g/cm³. At that the drilling fluid is injected with a rate of 18-21 l/s at a wellhead pressure of 8-10 MPa. The interval from the production string end till the bottomhole is worked out by a bit, simultaneously the well is washed by the drilling fluid with a density of 1.20-1.25 g/cm³, the drilling fluid is injected with a rate of 18-21 l/s at a wellhead pressure of 8-10 MPa. A filtering string of a low diameter is run in through the production string and the interval from the bottomhole until the production string is covered with partial covering of the production string end; the filtering string remains in the interval of the productive formation.

EFFECT: higher well productivity.

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