Abstract: A thermoelectric generator for producing electric power from heat in fluids produced from a subsurface wellbore includes a conduit for moving therethrough fluids produced from the Earth's subsurface and at least one thermoelectric module affixed to an exterior of the conduit. The at least one thermoelectric module includes a collimating heat transfer device in contact with the conduit on a first side and in contact with a first side of a thermoelectric generator thermocouple on a second side. A second side of the thermocouple is in contact with a contact surface of a heat sink. The heat sink is exposed to ambient atmosphere at the Earth's surface to conduct heat away from the thermocouple.

Abstract: A downhole gauge telemetry system for a multilateral well includes a first wireless transceiver located in a primary borehole of the multilateral well, a second wireless transceiver located in a lateral borehole of the multilateral well, a wireless connection between the first wireless transceiver and the second wireless transceiver through which the first and second wireless transceivers exchange data, and a surface transceiver communicatively coupled to the first wireless transceiver.