The Stability of a Pipe Stand Racked in a Derrick, Part 2—A General Pipe-Stand Model
- Steven J. Sawaryn (BP) | Phillip D. Pattillo (Clover Global Solutions)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- June 2014
- Document Type
- Journal Paper
- 476 - 486
- 2014.Society of Petroleum Engineers
- 1.10 Drilling Equipment
- Guidance , Derrick, Stability, Pipe-stand, Buckling
- 2 in the last 30 days
- 175 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 10.00|
|SPE Non-Member Price:||USD 30.00|
This paper builds on the information contained in Part 1 (the body of the paper preceding the appendices) and presents a general pipe-stand model. The model is based on the Fourier-series solution of the energy equation for calculating the deflection and buckling condition of an inclined, nonuniform pipe stand with an arbitrary number of intermediate loads and stick-up above the top racking board. Full details of the derivation and algorithms are included in the paper. This flexible approach is used to examine more-complex, practical situations that include the buckling sensitivity to the position of the upper support and added loads such as tool joints or running tools racked with the stand. Using a Fourier-sine-series solution avoids dealing with the less familiar higher-order functions encountered in Part 1, so the algorithms can be coded with standard spreadsheet functions. This approach also increases the model’s capability and practical worth, providing a tool suitable for field use. The results for loaded, uniform stands compare within 0.01% with the limiting cases represented by the analytical solutions presented in Part 1. Nonuniformity of the stand can add significantly to the number of series terms required. Several practical examples are used to illustrate the model’s application, including the analysis of stand with a heavy intermediate load where buckling occurred. The model successfully distinguishes between the buckled and nonbuckled conditions.
|File Size||1 MB||Number of Pages||11|
American Institute of Steel Construction. 2005/2009. ANSI/AISC 360-05, “Specification for Structural Steel Buildings,” March 9, 2005, December 2009 Revision, 32.
API RP7G. 1998. “RP for Drill Stem Design and Operating Limits,” API RP 7G, sixteenth edition, August 1998, Effective Date: December 1, 1998, Errata: May 2000, Addendum 1: November 2003, Addendum Effective Date: May 1, 2004.
Horn, R.A. and Johnson, C.R. 1994. Matrix Analysis, 21, Cambridge University Press.
Fox, L. and Mayers, D.F. 1977. Computing Methods for Scientists and Engineers, Clarendon Press Oxford.
Langhaar, H.L. 1962. Energy Methods in Applied Mechanics, New York: John Wiley and Sons Inc.
Neuringer, J. and Elishakoff, I. 1998. Interesting Instructional Problems in Column Buckling for the Strength of Materials and Mechanics of Solids Courses. Int. J. Eng. Ed. 14 (3): 204–216.
Sawaryn, S.J. 2011. Simple Engineering Applications Recycled as Effective Training Aids. Paper SPE 147242 presented at the SPE Annual Technical Conference and Exhibition, Denver, Colorado, 30 October–2 November. http://dx.doi.org/10.2118/147242-MS.
Sawaryn, S.J. 2012. The Stability of a Pipe Stand Racked in a Derrick, Part 1—Foundation. Paper SPE/IADC 163484 presented at the IADC/SPE Drilling Conference, Amsterdam, The Netherlands, 5–7 March. http://dx.doi.org/10.2118/163484-MS.
Stephenson, G. 1973. Mathematical Methods for Science Students, second edition, Chapter 9, 173–174, Upper Saddle River, New Jersey: Prentice Hall.
Timoshenko, S.P. and Gere, J.M. 1963. Theory of Elastic Stability, 24–37, New York: McGraw Hill.
Tolstov, G.P. 1976. Fourier Analysis, New York: Dover Books.
Walker, B.H. 1973. Some Technical and Economic Aspects of Stabilizer Placement. J. Pet Tech 25 (6): 663–672. http://dx.doi.org/10.2118/4263-PA.
Zienkiewicz, O.C. 1983. The Finite Element Method, third edition, New York: McGraw Hill.