Drilling EngineeringDirectional Drilling
Sliding Percentage from Required and Motor Dogleg Severity Formula
Sliding Percentage from Required and Motor Dogleg Severity calculates sliding percentage for directional drilling workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (DLS_req, DLS_motor) are known and the assumptions behind the cited directional drilling relationship match the engineering case being checked.
Assumptions
- Input values are representative for the well, reservoir, fluid, or equipment case being evaluated.
- The declared units match the field-unit constants used in the formula.
- The cited formula applies to the selected petroleum engineering workflow.
Limitations
- The calculation does not replace a full engineering model or operating procedure.
- Accuracy depends on the source correlation, assumptions, input quality, and unit consistency.
Common mistakes
- Mixing unit systems without converting the inputs.
- Using default example values as field recommendations.
- Applying the formula outside the source assumptions.
Default example
Using the default inputs, S_slide equals 83.333333 percent.
DLS_reqdegree/100 ft
10
DLS_motordegree/100 ft
12
Inputs
DLS_req
degree/100 ftRequired Dogleg Severity
DLS_motor
degree/100 ftMotor Dogleg Capability
Outputs
S_slide
percent
Sliding Percentage
DLS_req
degree/100 ft
Required Dogleg Severity
DLS_motor
degree/100 ft
Motor Dogleg Capability
Source and review
reviewedDirectional drilling toolface planning relationship for sliding percentage.
Source