Patent ID: 8474539
Filing Date: 2013-07-02
Classification: E21B

Abstract:
1. A system for supporting a catenary riser coupled to an offshore structure, comprising: a pull tube having one end disposed downward from the offshore structure and an upper portion distal from the one end fixedly coupled to the offshore structure at a first location, the pull tube having one or more segments; a stress joint middle segment having an outer diameter and an inner diameter defining a passageway for the catenary riser therein, the stress joint middle segment being coupled to one or more segments of the pull tube; a first sleeve disposed around a length of the stress joint middle segment, the first sleeve having an outer diameter and an inner diameter, the sleeve inner diameter and the stress joint middle segment outer diameter defining a first annular gap therebetween; and a sleeve guide coupled to the offshore structure at a second location different from the first location and at least partially surrounding a periphery of the first sleeve, wherein the combination of the pull tube portion fixedly coupled to the offshore structure at the first location and the sleeve guide coupled to the offshore structure at the second location maintains the position of the pull tube relative to the offshore structure at such locations during usage.