Wireline steering techniques
This technique has the advantage of real time readings from down hole, but the disadvantage of the wireline and associated handling problems.
Although technically wireline steering tools are also MWD systems, the term MWD is commonly used in the industry to mean systems with non-wireline data transmission systems.
The disadvantage of the mud pulse MWD systems is their relatively slow data rate and hence update of the downhole measurements. In a number of applications, e.g. with deep kick-offs or high torque motors, the MWD data rate is insufficient for . . .