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2 463 433

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(51)

IPC

E21B7/06(2006-01-01)

E21B43/10(2006-01-01)

(21) (22)

Application

2011118223/03, 2011-05-05

(24)

Start date

2011-05-05

(22)

Actual filing date

2011-05-05

(45)

Published

2012-10-10

(72)

Inventor

Nuriev Il'Jas AkhmatgalievichAkhmadishin Farit FoatovichMeling Konstantin ViktorovichMukhametshin Almaz AdgamovichIlalov Rustam KhisamovichNasyrov Azat LeonardovichKhabibullin Rustehm Jadkarovich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Imeni V.D. Shashina

METHOD OF DRILLING EXTRA BORE FROM WELL PRODUCTION STRING Russian patent published in 2012 - IPC E21B7/06 E21B43/10

Abstract RU 2463433 C1

FIELD: oil-and-gas production.

SUBSTANCE: proposed method comprises smaller-diameter side tracking with tailing in using standoff wedge. Additional casing is carried out in two steps. First, reaming tubes are lowered down to pay roof after side tracking. Then, after injection of isolation material, reaming tube are lowered to rest on roof, reamed and expanded by using composition with longer polymerisation which allows expanding auxiliary borehole over its entire length.

EFFECT: reduced costs, higher well performance, easier repair and maintenance.

2 dwg

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RU 2 463 433 C1

Authors

Nuriev Il'Jas Akhmatgalievich

Akhmadishin Farit Foatovich

Meling Konstantin Viktorovich

Mukhametshin Almaz Adgamovich

Ilalov Rustam Khisamovich

Nasyrov Azat Leonardovich

Khabibullin Rustehm Jadkarovich

Dates

2012-10-10—Published

2011-05-05—Filed