Mechanism and method for connecting ends of metal tubing

Abstract

A mechanism and method for connecting ends of coiled tubing for insertion and use in a well bore of a gas or oil well. The mechanism and method requires only a sleeve for insertion into the ends of the coiled tubing to be connected and a roll forming operation to produce mating circumferential grooves in the sleeve and coiled tubing surface to achieve the desired connection.

1 . (canceled)  
   
   
       2 . (canceled)  
   
   
       3 . A method for connecting ends of metal coiled tubing for insertion and use in a well bore of a gas or oil well, comprising: 
 providing a metal sleeve having an outside diameter of a size for insertion into opposed ends of said coiled tubing to be connected;    roll forming a plurality of circumferential grooves on an outside surface of said sleeve;    inserting said sleeve into said opposed ends of said coiled tubing to be connected with said opposed ends being in abutting engagement;    roll forming a plurality of circumferential grooves on an outside surface of said coiled tubing at said opposed ends thereof and in mating connection with said circumferential grooves on said outside surface of said sleeve.    
   
   
       4 . The method of  claim 3 , wherein a plurality of additional circumferential grooves are provided by roll forming on an outside surface of said sleeve and in each said plurality of additional circumferential grooves an O-ring seal is mounted therein for sealing said ends of said metal tubing against fluid leakage from said metal tubing at said opposed ends thereof.  
   
   
       5 . (canceled)