Calculations for Free Point in Stuck Drill Pipe Single or Tapered Strings

Enter the Information in the Red cells below, an estimated free point will be calculated

Stretch in inches 10 Measure Stretch in Inches

Overpull in Pounds 40,000 the Following Overpull(s)

Length of Larger Drill Pipe 4,440Length of Smaller Drill Pipe 0 2-7/8" DP 25,000.00

Plain-end weight of Larger Drill Pipe 17.93 3-1/2" DP 30,000.00

Plain-end weight of Smaller Drill Pipe 4-1/2" DP 35,000.00

Weight per/ft w / tool jt. on single string Drill Pipe 19.5 5" DP 40,000.00

EFP = Estimated Free Point EFP

3,250 Use the following Weights

### For Drill Pipe

EFP Plain End W / Tool Jt.

Method #2 single string of drill pipe 3,296 ### 2-7/8" DP 9.72 10.403-1/2" DP 12.31 13.30

EFP 3-1/2" DP 14.63 15.50

4,440 4" DP 12.93 14.00

4" DP 14.69 15.70

4-1/2" DP 14.96 16.60

4-1/2" DP 18.69 20.00

use the answer from Method #1 or #2 5" DP 17.93 19.50

Note: If Stuck point is Less than the length of Larger Drill Pipe