Patent ID: 9574424
Date: 2017-02-21
CPC Classifications: E21B

Claim:
1. A method for pre-tensing sections of concentric tubulars in a wellbore, the method comprising: mechanically coupling an inside tubing string to an outside tubing string as the inside tubing string and the outside tubing string are run into the wellbore, wherein the inside tubing string comprises at least one inside tubing pipe, and wherein the outside tubing string comprises at least one outside tubing pipe; mechanically coupling an additional inside tubing pipe to the inside tubing string disposed in the wellbore; mechanically coupling an additional outside tubing pipe to the outside tubing string disposed in the wellbore, wherein the additional inside tubing pipe is positioned inside a first cavity of the additional outside tubing pipe to form a first space between the additional inside tubing pipe and the additional outside tubing pipe; suspending, by the additional inside tubing pipe, the inside tubing string, the outside tubing string, and the additional outside tubing pipe; inserting, while suspending the inside tubing string, the outside tubing string, and the additional outside tubing pipe by the additional inside tubing pipe, a first slip into the first space between the additional inside tubing pipe and the additional outside tubing pipe, wherein the first slip comprises at least one inner slip feature and at least one outer slip feature that prevent the additional inside tubing pipe from moving downward relative to the additional outside tubing pipe; and inserting the additional inside tubing pipe, the inside tubing string, the outside tubing string, the additional outside tubing pipe, and the first slip further into the wellbore, wherein the first slip holds the additional inside tubing pipe and the inside tubing string under tension when the additional inside tubing pipe, the inside tubing string, the outside tubing string, the additional outside tubing pipe, and the first slip are inserted into the wellbore, and wherein the tension in the additional inside tubing pipe and the inside tubing string decreases as heat within the wellbore expands the additional inside tubing pipe and the inside tubing string.