Stakedown Plate

A plate staked to the ground to stabilize the forward end of the drill rack.

Standard Dimension Ratio

SDRSee Standard Dimension Ratio, Standard Dimension RatioSDR, Standard Dimension Ratio is defined as the ratio of the outside pipe diameter to wall thickness. is defined as the ratio of the outside pipe diameter to wall thickness.

Steerable moling

Method similar to impact moling with a limited steering capability.

Steering Head

A moveable lead section of casing that can be adjusted to steer the bore.

Stepwise

A logical process carried out in sequence.