Patent ID: 8955581
Filing Date: 2015-02-17
Classification: E21B,F22B

Abstract:
1. An indirect fired steam generator comprising: a containment structure having a length of approximately 80 feet to approximately 1200 feet and having a surrounding wall structure that defines an interior space for receiving and holding a heating medium under pressure; a network of one or more elongated heating tubes extending back and forth through the interior of the containment structure and wherein there is provided an open space between the network of heating tubes and the surrounding wall structure of the containment structure such that the heating tubes are configured such that when the containment structure holds the heating medium the network of heating tubes extend back and forth through the heating medium held within the containment structure; wherein the network of heating tubes includes an inlet for receiving water and an outlet for directing a heating medium-water mixture from the indirect fired steam generator; and further wherein the indirect fired steam generator forms one of a bank of indirect fired steam generators with each indirect fired steam generator of the bank including at least one network of heating tubes; and wherein the network of heating tubes disposed in the indirect fired steam generators are operatively interconnected such that water or a heating medium-water mixture flows from an input manifold into each of the indirect fired steam generators and the water or heating medium-water mixture therein is heated in the indirect fired steam generators as the water or heating medium-water mixture flows through the respective networks of heating tubes; and wherein the outlet from each indirect fired steam generator is operatively connected to a collection manifold.