Patent ID: 9726776
Date: 2017-08-08
CPC Classifications: G01V

Claim:
1. A towable transient electromagnetic survey device for connection to a land or water based towing vehicle, comprising: a central body structure defining at least two substantially parallel and vertically spaced apart bounded planes, an upper plane and a lower plane; a rigid first boom configured to interconnect the central body structure to a towing vehicle in a spaced apart relation; a rigid second boom connected to and extending from the central body structure in a substantially opposite direction from the first boom; at least two rigid side booms extending from the central body structure, wherein a distal end of each side boom is anchored to a point along the first boom by elastic cord; a transmitter loop for generating a primary electromagnetic field suspended about the distal ends of the second and additional booms and about at least part of the boundary of the upper plane closest to the towing vehicle; at least one receiver loop for receiving changes in secondary electromagnetic field signals from a survey subject, the receiver loop being located about at least part of the boundary of the lower plane; and a power supply connected to the transmitter loop and located in or on the vehicle or the central body structure.