Saturday, 4 November 2017

BHA DESIGN - HOW TO CALCULATE NUMBER OF DRILL COLLARS AND THE RELATED WEIGHT ON BIT (WOB)

DRILL COLLARS DESIGN AND CALCULATING WOB

Weight On Bit WOB Calculations drill collars design
Weight On Bit

Introduction To Weight On Bit

One of the functions of Drill Collars is to provide Weight On Bit (WOB). The number of drill collars that are required to provide a desired weight on the Drilling Bit is usually based on buckling considerations in the Drilling Bottom Hole Assembly (BHA).

Our Drill Collar Design Target

Before starting you should know that we have some targets here:
1- Determine the length of Drill Collars that we should be used to give us the required WOB
2- To determine if it is acceptable for you to keep some compression on HWDP
3- We don't want the buckling point to be in HWDP

Calculation Methods For Determination Of The Number Of Drill Collar In All BHA Types Design

Now Visit Below The Comparison Between Both Calculations Methods


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