Drilling EngineeringDirectional Drilling
Required Dogleg Severity from Build and Turn Components Formula
Required Dogleg Severity from Build and Turn Components calculates required dogleg severity for directional drilling workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (BUR, TR) 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, DLS_req equals 10 degree/100 ft.
BURdegree/100 ft
8
TRdegree/100 ft
6
Inputs
BUR
degree/100 ftPlanned Build Rate Component
TR
degree/100 ftPlanned Turn Rate Component
Outputs
DLS_req
degree/100 ft
Required Dogleg Severity
Source and review
reviewedDirectional drilling toolface planning relationship for required DLS from build and turn components.
Source