Non-elastomer cement through tubing retrievable safety valve

A downhole valve for use in a wellbore, the valve comprising:

• a tubular body;
• a movable flow tube having a bore therethrough, the flow tube disposed in the tubular body to form a first annular area and a second annular area therebetween;
• a flapper movable between an open position and a closed position, whereby in the closed position the flapper is substantially within the second annular area;
• a first sealing system for substantially isolating the first annular area from contaminates in the bore;
• and
• a second sealing system for substantially isolating the second annular area from contaminates in the bore.

A method of controlling fluid in a wellbore, comprising:

• positioning in the wellbore a string of production tubing and a valve, the valve comprising:
• a tubular body;
• a flow tube having a bore therethrough, the flow tube disposed in the tubular body to form an annular area therebetween;
• a flapper movable between an open position and a closed position;
• and
• a sealing system;
• opening the flapper in response to the movement of the flow tube;
• pumping cement through a bore of the production tubing and the bore of the flow tube;
• and
• substantially isolating the annular area from the cement pumped through the valve.