In geothermal drilling operations, lost circulation of drilling fluid is a huge issue
That's because the downhole rocks are so brittle, their natural fractures alone cause significant fluid loss. This affects mud pulse technology (where data signals are sent from the bottom of the hole to the surface with the help of a continuous fluid column). If telemetry signals disappear because of a fluid loss, the operator is suddenly working "blind" since drilling data signals have been interrupted.
Halliburton's EMT MWD/LWD service allows for uninterrupted data transmission without a continuous fluid column
Simply put, the EMT service establishes a two-way communications link between the surface and the tool downhole. Using low-frequency electromagnetic wave propagation, this service facilitates high-speed data transmission to and from the surface through any formation. Data formats can be readily customized to suit the drilling needs of the particular well. This service provides a cost-effective alternative to pulse systems. That's a key differentiator from other services on the market.
Halliburton's EMT technology has many applications, including making drilling more cost-effective, especially when drilling with air or gasified drilling fluids—an environment in which conventional mud pulse telemetry systems cannot function.
To date, more than 70 percent of downhole runs using the service have been on applications where high data density and low survey time are key factors to successful drilling operations.