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Oil/Gas/The pipe string neutral point calculation

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Question
Dear Sir,
I would like to know what is the pipe string in the vertical wells neutral point (NP)calculation formula?

Answer
Here is the definition for the neutral point:

http://www.glossary.oilfield.slb.com/Terms/n/neutral_point.aspx

The formula is quite complicated and typically this calculation is made using torque and drag analysis software. When the pipe is hanging in the well there is no neutral point because the pipe is in tension; however, when the pipe is set down on something then the neutral point will start at the bottom of the pipe and move upwards as more weight is set down. The pipe may also experience buckling and this must be considered in the calculations was well.

If you want to download a demo of our software (which performs all of these calculations) you can do so at the link below. Just fill out your information and then select "Cerberus for Well Intervention" in the drop-down.

https://ctes.nov.com/CustomerPortal/Compliance.aspx?Type=Demos

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David Traugott

Expertise

I can answer questions related to the technical issues associated with the drilling and completing of oil and gas wells; very familiar with the cementing process, LWD tools and Coiled Tubing operations. Limited knowledge of mineral rights and/or royalties.

Experience

Seventeen years working as an engineer in the industry both in the field and in the office. Field locations include offshore, land, and overseas. Office locations include Lafayette, LA and Houston, TX.

Organizations
SPE, AADE, IADC, API, IEEE, ICoTA

Publications
SPE Drilling and Completion Magazine, World Oil, Harts E&P.

Education/Credentials
Bachelor of Science in Electrical Engineering, UL Lafayette 1995. Strategic MBA, University of Houston-Victoria 2010

Past/Present Clients
Major and Independent Oil and Gas Companies.

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