MULTI-BOTTOMHOLE DESIGN FOR PRODUCTION IN PERMAFROST AREAS Russian patent published in 2010 - IPC E21B43/24 

FIELD: oil-and-gas industry.

SUBSTANCE: design includes main and lateral bottomholes. A production string equipped in a under permafrost area with a wellhead shut off valve, in a interval over the top lateral bottomhole - production string thermal expansion bend, a flow valve, a string separator, a production parker, a landing nipple, a bowl guide. In a interval opposite to the side boreholes are mini-windows units with installed over it sealing parkers with landing nipples, and under them - snap shut connection. In a interval between the lateral boreholes and under the bottom lateral bottomhole pipes installed, equipped with bottom pipes shoe with polished tips. At that the bow guide located on the lower situated equipment and didn't connect to it. The production string in permafrost area interval can be equipped with thermal insulated pipes, and in interval over the top lateral bottomhole - with inhibitor valve. The production string diametre to be estimated form analytical equation.

EFFECT: multi-bottomhole well design reliability increase.

4 cl, 1 dwg