Patent ID: 9689514
Date: 2017-06-27
CPC Classifications: E21B,F16L,Y10T

Claim:
1. A composite pipe to metal end fitting joint comprising: a discrete metal inner sleeve formed proximally with an annular outwardly projecting stop flange and projecting distally with an annular shell formed with a distally extending, continuous inwardly tapering conical inner sleeve bonding surface: a discrete metal outer sleeve received over the inner sleeve abutted on one end with the stop flange and further formed with a distally projecting outer shell concentric with the inner shell and formed with a distally radially outwardly expanding continuous outer shell bonding surface cooperating with the inner sleeve bonding surface to form an annulus distally expanding in thickness: a composite pipe formed on one extremity with a peripheral wall having a thickness narrowing proximally to form a proximally narrowing connector ring received complementarity in the annulus; and a bond on the interface between the connector ring and shell surfaces to form respective bonds; and a metal connector flange between the inner and outer sleeves and connecting the sleeves together at the proximal end to form the shells and connector flange as a rigid torque unit so torque loads on the pipe will be carried through the bonds to the inner and outer bonding surfaces.