EXPANDABLE BULLNOSE OF VARIABLE LENGTH TO BE USED WITH INCLINED WEDGE DEVICE IN WELLBORE Russian patent published in 2017 - IPC E21B7/08 

Abstract RU 2622561 C1

FIELD: oil and gas industry.

SUBSTANCE: well system contains the upper inclined wedge, positioned in the main wellbore and determining the first and the second channels; the lower inclined wedge, positioned in the main wellbore and apart from the upper inclined wedge on the predetermined distance, at that the lower inclined wedge determines the first casing column, having the predetermined diameter and connected to the lower part of the main bore, and the second casing column, connected to the lateral bore, and a bullnose, containing the housing and the bullnose cap, positioned at the distal end of the housing, at that the bullnose is driven in the interval between default configuration and the actuated configuration. The upper and the lower deflector wedges guide the bullnose into one of the following: the side bore or the lower part of the main bore, based on the length and diameter of the bullnose tip, compared with the predetermined length and the predetermined diameter, respectively.

EFFECT: it is provided the accurate input into one side bore of the multibore well.

21 cl, 13 dwg

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RU 2 622 561 C1

Authors

Ladzhesik Borisa

Stouks Mettyu Bredli

Dates

2017-06-16Published

2013-07-25Filed