Rotating the drill string causes the bent housing
with drill bit attached to changes direction.
To provide a more positive control, the deflection shoe was used with stabilizers on the motor, rather than the bent housing
. Being near the sidetracker bit, the shoe stabilized the tool and positive deflection effect.
A complete selection of fixed or adjustable bent housings
; slick or eccentric housings; and wear protection are standard.
on the motors also vary, from 0.5 to 2.5 degrees depending on how sharp an angle the driller needs to build the curve; this can be anywhere from 12.5 to 19 degrees per 100 feet according to Vlado Katic, president of Guided Horizontal Drilling.