XEM Telemetry
Where XPulse communicates with pressure pulses imposed onto the drilling fluid, electromagnetic (EM) telemetry communicates by emitting EM signals into the earth's formations.
Similar to XPulse, surveys are taken when the pumps are turned off and new pipe connections are made. The data is then transmitted to the surface receiver and decoded to the doghouse display while the pumps are turned off during the connection. The system is designed to allow for continuous drilling without any hassle of stopping operations to perform surveys.
The XEM can be used in normal drilling applications (similar to XPulse) and it has the added advantage of being able to communicate in an underbalanced drilling medium.
XEM also adds value with its higher data rate and can be utilized when drilling rate of penetration is aggressively too fast for a mud pulse telemetry system. XEM has no moving parts and therefore has less risk of mechanical failure and/or erosion.
XEM can provide the necessary information operators need to steer the well. There is no personnel necessary for this operation unlike common MWD applications.