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2 021 490

(13)

(51)

IPC

(21) (22)

Application

4933932/03, 1991-05-05

(22)

Actual filing date

1991-05-05

(45)

Published

1994-10-15

(72)

Inventor

Ehfendiev Oktaj Ismail Ogly[Az]Nabiev Adil Dakhil Ogly[Az]Bekirov Namik Isfendijar Ogly[Az]

(73)

Holder

Osoboe Konstruktorskoe Bjuro Po Proektirovaniju Neftegazodobyvajushchikh Mashin I Oborudovanija

SUBSURFACE SAFETY VALVE Russian patent published in 1994 - IPC

Abstract RU 2021490 C1

FIELD: subsurface safety valves. SUBSTANCE: subsurface safety valve has gate with step annular groove filled with flexible material. Internal part of groove is communicated through channels made in gate with well space below subsurface safety valve. EFFECT: higher efficiency. 2 dwg

Similar patents RU2021490C1

Title	Year	Author	Number
DOWNHOLE CUTOFF VALVE	0	Efendiev Oktaj Ismail Ogly Nabiev Adyl Dakhil Ogly Mamedrzaev Agalyatif Abdulgusejn Ogly Khalilov Ziyafat Khalil Ogly	SU1629491A1
DEEP-WELL CUTOFF VALVE	0	Dzhafarov Shamil Talyb Ogly Ibragimov Eldar Ali Ogly Bekirov Namik Isfendiyar Ogly	SU1035197A1
EQUIPMENT FOR OPERATION OF BLOWOUT WELLS	1991	Ehfendiev Oktaj Ismail Ogly[Az] Rzaev Ali Islam Ogly[Az] Akhmedov Khikmet Jusif Ogly[Az]	RU2021492C1
	0	Efendiev Oktaj Ismail Ogly Babaev Arif Ejvaz Ogly Akhadov Mekhti Seid Ogly Nabiev Adil Dakhil Ogly	SU1781416A1
DEEP-WELL CUTOFF VALVE	0	Dzhafarov Shamil Talyb Ogly Ibragimov Eldar Ali Ogly Bekirov Namik Isfendiyar Ogly	SU1082933A2
SET OF CONTROLLED CUTOFF VALVES	0	Akhmedov Khikmet Yusif Ogly Arutyunov Rafail Artemovich	SU1222821A1
BOREHOLE GATE	2011	Nabiev Adil Dakhil Ogly Nikolaev Oleg Sergeevich	RU2465438C1
VALVE IN GAS LIFT BELLOWS	0	Bekirov Namik Isfendiyar Ogly Braslavskij Vladimir Moiseevich	SU1836544A3
DEVICE FOR GAS-LIFT WELL OPERATION	0	Efendiev Oktaj Ismail Ogly Rzaev Ali Islam Ogly Babaev Arif Ejvaz Ogly Akhadov Mekhti Seid-Baba Ogly	SU1801170A3
BLOWOUT WELL OPERATION OUTFIT	0	Efendiev Oktaj Ismail Ogly Rzaev Ali Islamovich Akhmedov Khikmet Yusif Ogly	SU1710703A1

RU 2 021 490 C1

Authors

Ehfendiev Oktaj Ismail Ogly[Az]

Nabiev Adil Dakhil Ogly[Az]

Bekirov Namik Isfendijar Ogly[Az]

Dates

1994-10-15—Published

1991-05-05—Filed