Gas lift valve - Patent 2863006

(19)

(11)

EP 2 863 006 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	23.12.2015 Bulletin 2015/52

(43)	Date of publication A2:
	22.04.2015 Bulletin 2015/17

(21)	Application number: 14185861.3

(22)	Date of filing: 22.09.2014

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International Patent Classification (IPC):

E21B 43/12^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

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Priority:

24.09.2013 US 201361881663 P
21.05.2014 US 201462001448 P

(71)	Applicant: Weatherford/Lamb Inc.
	Houston, Texas 77056 (US)

(72)	Inventors:
	LONG, Stephen David The Woodlands, TX Texas TX 77381 (US) SALIHBEGOVIC, Zlatko New Iberia, LA Louisiana LA 70563 (US) HOPE, John Michael Kingwood, TX Texas TX 77339-1409 (US)

(74)	Representative: Talbot-Ponsonby, Daniel Frederick
	Marks & Clerk LLP Fletcher House Heatley Road The Oxford Science Park Oxford OX4 4GE Oxford OX4 4GE (GB)

(54)	Gas lift valve

(57) A method for performing downhole gas lift operations includes coupling a gas lift valve (140) to a tubing (120), wherein the gas lift valve includes an actuator (240), a flow control device (250) disposed in the actuator, and a closure member (230) that is initially in an open position; injecting a gas downhole and exterior to the tubing; urging the gas to enter the tubing via the gas lift valve; and creating a sufficient pressure differential across the gas lift valve to move the actuator, thereby causing the closure member to close the gas lift valve.

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