METHODS AND SYSTEMS FOR PERFORMANCE OF SUBTERRANEAN OPERATIONS USING DUAL STRING PIPES

摘要

Methods and systems for improving delivery and retrieval of fluids to and from a downhole location are disclosed. A dual string pipe (202) is provided which comprises an outer pipe (206), an inner pipe (204) positioned within the outer pipe, and a bottom hole assembly (210) fluidically coupled to the outer pipe and the inner pipe. A diverter sub (208) is coupled to the inner pipe and is selectively operable in a normal drilling mode and a high flow mode. In the normal drilling mode a fluid is directed downhole through the inner pipe and in the high flow mode a return fluid is directed uphole through the inner pipe.

主权项

1. A dual string pipe comprising:
an outer pipe; an inner pipe positioned within the outer pipe; a bottom hole assembly fluidically coupled to the outer pipe and the inner pipe; a diverter sub coupled to the inner pipe,
wherein the diverter sub is selectively operable in a normal drilling mode and a high flow mode,wherein in the normal drilling mode a fluid is directed downhole through the inner pipe, andwherein in the high flow mode a return fluid is directed uphole through the inner pipe.