METHOD OF DRILLING WELLS OR SECOND BOREHOLES WITH HORIZONTAL COMPLETION Russian patent published in 2009 - IPC E21B7/04 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, particularly to drilling of oil, gas and gas condensate wells and second boreholes with horizontal completion. The method of drilling wells with horizontal completion consists in drilling a pilot borehole with specified zenith angle for exposure of a producing reservoir, in arranging means for kickoff in the pilot borehole, in flow string running, in performing geo-physical survey, and in drilling a horizontal section in the production reservoir. The pilot borehole is used as transport one; the flow string is lowered into it. The horizontal section is drilled from the pilot borehole. Means for kickoff are assembled so, as to reach zenith angle to come to the horizontal section in the process of drilling. The pilot borehole is drilled with the zenith angle up to 89°.

EFFECT: upgraded accuracy of production reservoir exposure at reduced period of drilling, also it facilitates increased oil (gas, condensate) yield and reduced watering of production.

8 cl, 10 dwg