Abstract: A control line clearing apparatus has a separation sleeve that positions into a downhole element adjacent the element's control port to which a blocked control line connects. The sleeve separates fluid communication from the control port with the annulus between the sleeve and the downhole element, while still allowing effluents in the well tubing to pass through the interior of the sleeve. A feed line is then lowered into the sleeve, and an automatic coupling on the end of the feed line couples to a coupling member inside the sleeve. Once connected, solvent fed through the feed line communicates with the downhole elements control port via a cross-port in the sleeve. In this way, the solvent can act against the other side of the control line blockage.

Abstract: The invention relates to a safety valve for oil wells, able to permit artificial output operation by injection of a fluid under pressure. This valve comprises a movable closing flap (11), a tubular internal slide (9), a spring (10) for returning said slide to its upper position, a hydraulic system for displacing said slide downwardly due to pressure of a control fluid, an internal tube (300) for passage of injected fluid, fixed to the slide (9), a lower connecting sleeve of a series of lower tubes (Ti) for the passage of injected fluid, able to be connected with the internal tube (300) when the tube is in the lower position, an upper connecting sleeve (309) of a series of upper tubes for the passage of injected fluid, in which may slide in a sealed manner the internal tube, a system for anchoring the valve in a receiving sleeve (1) comprising a hydraulically actuated mechanical system controlled by the control fluid, and seals (15, 16) at the contact of the receiving sleeve (1).