Abstract: There is provided a protective method and joint for multiple consecutive production tubing each having a body portion and an increased diameter portion within a zone to be protected, the method including the steps of installing a plurality of first generally cylindrical annular protective rings coaxially over the body portion of each tubular; placing a plurality of second generally cylindrical annular protective rings coaxially locatable along the increased diameter portion of each tubular over the body portion of the first tubular while supporting the second protective rings with at least one sleeve coaxially located along the body portion of the first tubular; coupling a second tubular to the first tubular to form coupled tubulars; and placing the second protective rings over the increased diameter portion of the second tubular while using at least one sleeve to limit movement of the second protective rings in their radial direction and facilitate movement of those rings over the increased diameter and body

Abstract: A coupling joint for thermoplastic hose comprising a nipple having annular ribs of approximately the same diameter as the hose I.D., for easy insertion into the hose, and a nut of rigid material threaded over the hose O.D. and radially opposite the ribs. The nut has a rounded tapered thread that deforms the hose material to fill the thread and to cause the I.D. of the hose to fill the spaces between the annular ribs. The nipple has a cylindrical portion at its end and the nut has a counterbore at its forward end and the hose is lightly gripped therebetween to avoid sudden stress concentration on the hose at the first rib.