Spoolable flexible hydraulic controlled coiled tubing safety valve

Abstract

A coiled tubing completion system is provided with a plurality of completion apparatus, all of which is designed flush with the diameter of the coiled tubing outside diameter for avoiding upsets and are flexible, spoolable on a coiled tubing reel and having through bores large enough to pass wireline tools for performing other operations. The spoolable coiled tubing system may use standard coiled tubing well control equipment and can be used in live wells. The flush, flexible, spoolable and through bore completion equipment may include a tubing retrievable safety valve, an annular control valve, concentric gas lift valves, a zone packer, a landing nipple, a sliding sleeve, and may include at the end a non-flexible but flush and open bore production packer and pump out plug. The completion system may be retrieved through a retrieval system.

What is claimed is: 
     
       1. A spoolable flexible hydraulic controlled coiled tubing safety valve positioned in a coiled tubing comprising, a housing secured to the inside of the coiled tubing, said housing having a passageway extending therethrough for the passage of wireline tools when the valve is open,   a valve closure member in the passageway moving between open and closed positions for controlling fluid flow through the passageway,   a flow tube telescopically moving in the housing for controlling the movement of the valve closure member,   hydraulic piston and cylinder fluid actuating means positioned above and connected to the flow tube,   biasing spring means positioned about the flow tube and connected thereto for moving the valve to a closed position, and   said spring means and said flow tube are longitudinally flexible for allowing bending about the longitudinal axis of the valve for allowing the valve to be spooled on a coiled tubing reel.   
     
     
       2. The valve of claim 1 including, a down stop connected to the inside of the coiled tubing for limiting the movement of the flow tube.   
     
     
       3. The valve of claim 1 wherein the coiled tubing includes a wall and including, a hydraulic control line connected to the hydraulic piston and cylinder actuating means positioned in the wall of the coiled tubing.   
     
     
       4. The valve of claim 1 wherein the housing includes first and second separated parts each secured to the inside of the coiled tubing. 
     
     
       5. The valve of claim 1 wherein the flow tube includes a plurality of separated longitudinally extending ribs for providing longitudinal flexibility. .Iadd. 
     
     
       6.  A spoolable flexible coiled tubing safety valve configured for use with a coiled tubing completion system, comprising: a tubular member having a passageway extending therethrough,   a valve closure member positioned in the passageway,   a flow tube positioned in the passageway,   a flow tube actuator connected to the flow tube,   and a biasing element connected to said flow tube,   wherein said coiled tubing safety valve is sufficiently flexible to be spooled on a coiled tubing reel. .Iaddend.