TOOL FOR MAIN AND LATERAL BOREHOLES OF ONE WELL HERMETIC CONNECTION Russian patent published in 2010 - IPC E21B43/10 E21B7/08 

FIELD: oil-and gas industry.

SUBSTANCE: invention related to oil-and gas industry, particularly to multi-borehole wells fixing tools. Includes casing strings of a main and additional boreholes and a connection pipe. A connection pipe located in the casing string additional borehole upper part and equipped with boreholes connection sealing element. A basement executed as a sleeve with a bottom slot. The sleeve segment and the connecting pipe executed with ability to be directed to additional borehole using wedge - incliner, installed for the additional borehole bypassing, orienting with the use of the slot, interacting with wedge technological step, and tough interaction with the casing string internal surface around the lateral borehole window with help of hermetic and tack rolling.

EFFECT: multi-borehole well boreholes reliable and hermetic fixing, also providing possibility of multi-borehole well construction form bottom to the top and from the top to the bottom as well, due to excluding of the main borehole bypass cross section narrowing, wide application area.

4 dwg