COMPLETION METHOD OF HORIZONTAL WELL Russian patent published in 2015 - IPC E21B21/00 

FIELD: oil and gas industry.

SUBSTANCE: method includes drilling of a well, running in of a production string to a horizontal part of the well with a mud-inflatable packer, a stop ring and a stage cementing collar at the end, injection of the cement grout to the annular space, the process withhold for the time of the cement hardening, drilling of the stop ring and collar and the well development. At running in the production string is stopped at a distance from the bottomhole, drilling of the stop ring and collar is made with the usage of a drilling fluid with a density from 1.20 up to 1.25 g/cm³, it is injected with a rate of 18-21 l/s at a pressure of 8-10 MPa at the wellhead. The interval from the production string end till the bottomhole is worked out by a bit, the well is washed by the drilling fluid at a wellhead pressure of 8-10 MPa, a filtering string of a low diameter is run in through the production string and an 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. At running in the production string is stopped at a distance from the bottomhole equal to 50-150 m. Partial covering of the production string end by the filtering string is made per 5-10 m.

EFFECT: increased well productivity.

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