LWD stands for Logging While Drilling. Logging is the process of collecting borehole information as the sensor travels along the well. LWD collects that information and passes
it to the surface with the MWD tool.
Mud Pulse is a way that the information is sent from downhole. A Mud Pulse tool sends the downhole information by restricting the flow of drilling mud. When the drilling mud is
restricted, at surface the rig sees a pressure spike. Those spikes are translated on surface into telemetry data.
EM is a way that information is sent from downhole. An EM tool sends the downhole information by altering current pulses from the tool. Low current, low frequency pulses are constantly
transmitted from the tool. The spikes in current are read on surface by an amplifier that translates them into telemetry data.
Many wells are drilled vertical. They must stay within a vertical boundary. A Vertical Monitoring Tool is an unmanned mud pulse tool that gives telemetry at connection.
If the hole begins to build excessively then more expensive MWD tools are brought in to correct the hole.
A pulser is the module within an MWD tool that restricts flow of the drilling fluid. It uses dynamic fluid properties to move the bottom end up and
down. The bottom end restricts flow when instructed to by the pulser.
KAMBI Enterprises Inc. is a Calgary-based company specialized in well bore navigation and logging technologies. Since our inception in 1999, we have expanded to become a multinational
drilling service measurement provider. Our combination of innovative and proven technology, operational expertise, and product development enables us to continually provide professional and
efficient solutions for today's oil and gas industry.