# Drilling Formulas and Calculation Summary Page

I created summary page for drilling formulas and calculations (http://www.drillingformulas.com/drilling-formulas-and-calculation-sheets/). I wish these excel sheets would be helpful for you.

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Working in the oil field and loving to share knowledge.

### 17 Responses to Drilling Formulas and Calculation Summary Page

1. Jimmy says:

Great work.
Thanks.

2. Mohammed Almusheti says:

its the strongest site I have read
thank you very much

3. shrawan kumar, india says:

marvellous job done. thanq very-very much

4. Warrie says:

If you run in with a ported float in the string, how would you calculated the displacement. Also if while running in with the float and you noticed that the displacement is completely closed end, what could be your best option to calculate displacement. Note, you are allowed to fill the pipe but not allowed to pump due to perceived low overbalance pressure. How best can you calculate you displacement in these scenarios.

• The best way to calculate displacement with float in the drillsting (ported float or solid float) is to use only OD of drill pipe to calculate displacement because mud cannot come inside the drillstring.
The formula for the displacement will be => displacement = (OD^2)/1029.4 in bbl/ft.

Once you fill up pipe, you should use the original formula to check the displacemen.

5. Indeed, great job, am greatful for all your effeorts so far. More grease to you elbow.

6. TRILOCHAN PATRA says:

This calculation and concepts seems to buield some good knowledge for people in drill site.

7. excllency sir,i found this very helpful during drilling activities.i suggest people to use feedburner so as to enhance your expertise and skill.thanks FEEDBURNER

8. Ramana says:

Its really more helpful during drilling.
If study this will improve our knowledge more……….

9. Shahnawaz says:

Really fantastic website..

10. ABD EL HAKIEM EL NAHHAL says:

it is a very good handout and very helpfull for the on site supervisors , thank you very much for that great effort

11. ABD EL HAKIEM EL NAHHAL says:

THE SITE IS A GREAT SITE TAKING CARE BY HIS PEOPLE

12. Todd says:

Do you have a calculation for negative test?

• I don’t have it but you can calculate the negative test using the difference of hydrostatic pressure from the fluid in the wellbore.

13. Brian says:

Please assist with this question, I’m not sure I understand the question

While drilling ahead at 14,300’ lost circulation was encountered. The hole size is 12 ¼”. The BHA is 360’ of 8” X 2” Drill Collars, 900’ of 5” HWDP with an ID of 2.5” and 5”, 19.50, NC 50 drillpipe with an ID of 4.276”. The plan is to spot a 100 bbl LCM Pill with the same mud weight as the mud 12.5 ppg.
Describe how this pill is spotted, show bbls to displace the pill

14. Faisal Sohail says:

I need formula for calculating ECD in aerated drilling (Drilling with the air being injected into mud through Standpipe)