Patent ID: 9657530
Date: 2017-05-23
CPC Classifications: E21B,F16L

Claim:
1. A casing joint assembly, comprising: a casing joint having an upper end and a lower end; a cylindrical upper coupling joint configured to axially interpose an upper casing section and the upper end of the casing joint, the upper coupling joint having a first portion threadable to the upper casing section and a second portion threaded to the casing joint at the upper end, wherein the casing joint assembly has a constant inner diameter and a constant outer diameter extending between the upper casing section and the upper end of the casing joint; a joint interface securing the first portion to the second portion, wherein the first portion is made of a first material and the second portion is made of a second material dissimilar to the first material; and an inner coating applied to the constant inner diameter of the upper coupling joint and extending axially across at least the joint interface.