Imbò P, Gandini G. Electro Magnetic Wireline Retrievable-Surface Controlled Subsurface Safety Valve: A New Backup For Surface Controlled Subsurface Safety Valve To Avoid WorkOver. Journal of Petroleum Research and Studies [Internet]. 2011Dec.1 [cited 2024Jul.27];2(3):1-21. Available from: https://jprs.gov.iq/index.php/jprs/article/view/47