Patent ID: 6788065
Filing Date: 2004-09-07
Classification: G01V

Abstract:
A tubular for monitoring subsurface reservoir characteristics in a directed orientation, comprising:an elongated metallic body with a longitudinal axis for permanent disposal within a borehole traversing the reservoir; a plurality of openings formed along the tubular wall to allow for passage of electromagnetic energy therethrough, the openings formed at an angle with respect to the longitudinal axis of the tubular and sealed to prevent fluid passage; a groove formed about the external circumference of the tubular in alignment with the openings; an antenna disposed on the exterior of the tubular within the groove such that its axis is tilted with respect to the axis of the tubular, the antenna adapted to transmit or receive electromagnetic energy; wherein the antenna is disposed on the tubular such that the antenna is perpendicular to the tubular openings at intersections of the antenna and openings; and the tubular adapted for connection to another tubular to form a conduit for passage of subsurface fluids or gases through the reservoir.