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2 508 447

(13)

(51)

IPC

E21B44/00(2006-01-01)

E21B4/02(2006-01-01)

(21) (22)

Application

2013105889/03, 2013-02-12

(24)

Start date

2013-02-12

(22)

Actual filing date

2013-02-12

(45)

Published

2014-02-27

(72)

Inventor

Molodilo Vladimir IvanovichKorotaev Sergej NikolaevichD'Jakonov Grigorij Anatol'Evich

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Instrument"

METHOD OF CONTROL OVER HYDRAULIC FACE MOTOR UNDER FACE CONDITIONS Russian patent published in 2014 - IPC E21B44/00 E21B4/02

Abstract RU 2508447 C1

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises measuring the pressure in injection line with loaded and idle bit and maintaining constant measured differential pressure. Note here that maximum tolerable bit feed speed (Vtf) is defined by mathematical formula. Then, bit feed speeds are defined and in case it exceeds said maximum tolerable magnitude it is decreased to Vtf.

EFFECT: higher efficiency of drilling.

2 dwg

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RU 2 508 447 C1

Authors

Molodilo Vladimir Ivanovich

Korotaev Sergej Nikolaevich

D'Jakonov Grigorij Anatol'Evich

Dates

2014-02-27—Published

2013-02-12—Filed