Casing Design using the Maximum Load Method on Offshore Development Wells

  • Agustinus Sua Azi Department of Petroleum Engineering, School of Petroleum Studies, Dili Institute of Technology, Timor-Leste
Keywords: Casing design, maximum load, burst load, collapse load, tension load, biaxial load


Casing planning is an important aspect in drilling activities oil, gas and geothermal. Pore ​​pressure and fracture gradient analysis is needed to plan the casing setting depth and to determine the number of casing sections that will be run into the drilling well and continued with casing load planning including burst loads, collapse loads, tension loads and biaxial loads. The maximum load method was used to design the casing for the Furak well. Furak well is an offshore development well which is planned to be drilled. The total depth of when measured from the rotary table is 9840 TVD, and measured from sea bed 9332 TVD to seawater depth 442 ft. The casing setting depth for conductor casing is 502 ft from the seabed and recommended conductor casing string diameter 20 inc,grade H-80 pounder 94 lbf, connection type with short thread coupling (STC). The casing setting depth for the surface casing is 1987 ft from the seabed and recommended surface casing string diameter 16 inc, grades are top of casing grade N-80 pounder 84 lbf, middle of casing grade K-55 pounder 75 lbf, and bottom of casing grade H-40 pounder 65 lbf, connection type with short thread coupling (STC). The casing setting depth for the intermediate casing is 5962 ft from the seabed and recommended intermediate casing string diameter 10.75 inc, grades are top of casing grade N-80 pounder 55.5 lbf, middle of casing grade K-55 pounder 45.5 lbf, and bottom of casing grade H-40 pounder 40.5 lbf, connection type with short thread coupling (STC). The casing setting depth for the production casing is 9332 ft from the seabed and recommended surface casing string diameter 7 inc, grades are top of casing grade P-110 pounder 38 lbf, middle of casing grade HCN-80 pounder 32 lbf, and bottom of casing grade L-80 pounder 26 lbf, connection type with long thread coupling (LTC).


Download data is not yet available.


Adams, N. J., (1985): Drilling Engineering a Complete Well Planning Approach, Tulsa, Oklahoma: Penn Well Books.

American Petroleum Institute Specification 5 Casing Tubing, Eighth Edition, July 1, 2005.

Azi, A. S., (2020): Casing Setting Depth Design using Bottom-Up Method for Development Well in Offshore, TLJES Vol I 2020.

Bourgoyne, J., Adam, T., Millheim, K. K., Chenevert, M. E., Jr Young, F. S., (1986), Applied Drilling Engineering, Society of Petroleum Engineers, Richardson TX, United State of America.

Bravkova, N., Truba, A., Sandusta, A., Zadvornov, D., Grachev, O., Giniatullin, R., Kireev, V., Pilipets, E., Krepostnov, D., Mishakov, M., Gazimov, R., Gallimulin, R., Khlebnikov, V., Medvedev, P., (2017): New Approach Dual Casing Design for Horizontal Well, SPE-187711-MS.

British Gas Group., (2001): Well Engineering and Production Operations Management System, Casing Design Manual, 30 – 35.

Cahill, Q., Marsh, R., Cologero, D., Dutta, B., (2021): Predictive Modelling and Technical Design Aplication into Effective Casing Wear Operational Management Plan, SPE-201076-MS.

Cayeux, E., Stokka, S., Diverges, E. W., Thorogood, J. L., (2021): Buoyancy Force on a Plain or Perforated Portion of a Pipe, SPE-204025-PA.

Chukwudi, O., Stanley, I., Boniface, O., Stanley, O., Federal University of Technology (2018): A Realistic Kick Simulator for Casing Design – Part 2, SPE-193390-MS.

Chineke, J. J., Alabi, T., Okwa, H. D., (2021): Cost Saving Through Casing Design Optimization ALA-3 as Case Study, SPE-208226-MS.

Coker, O., Kalil, I., McSpadden, A., Glover, S., (2020): A Practical Methodology to Assess Casing Integrity and Service Life with Salt Collapse Loads in Unconventional Developments, SPE- 199577-MS.

Fertl, W. H., (1975): Abnormal Formation Pressure, Implication to Exploration, Drilling and Production of Oil and Gas Resource, Ponca City Oklahoma.

Heriot–Watt., (2005): Drilling Engineering.

Kotow, K. J., Pritchard, D. M., (2018): Exploiting Shallow Formation Strengths to Deepen Riderless Casing Seat, SPE-191724-MS.

Liu, Z., Samuel, R., Gonzales, A., Kang, Y., (2020): Collapse Design of UOE-Pipe Wellbore Casing, SPE-203176-MS.

Lage, A. C. F. M, Edson Y., Nakagawa., Rocha L. A. S., (1997): Description and Application of New Criteria for Casing Setting Depth, Offshore Technology Conference, OTC-8464.

Moore, P. L., (1986): Drilling Practices Manual, Second Edition, Penn well books, Tulsa Oklahoma USA.

Moughalu, A., Ansa, J., Dosunmu, A., (2020): Probability Approach to Casing Design Using Monte Carlo Simulation, SPE-203649-MS.

Nguyen, T. C., De Olivera, R., Al-Safran, E., Saasen, A., (2017): Casing Design Optimization with CAML Technique and Drilling Fluid Performance, SPE-185951-PA.

Pereira, L., Ichim, A., McCarthy, K., Mutis, D., (2020): Collaborative Development of a Production Casing Connection for Well Design in the Permian Basin, URTEC-2020-2978-MS.

Rabia, H., (2002): Well Engineering and Construction.

Romero, C., Alvarez, J., (2020): Optimization of Casing Design for Wells Drilled in Llanos Region in Colombia. A Technical Analysis of Problematic and the Adopted Solutions, SPE-198968-MS.

Rubiandini, R., (2012): Teknik Operasi Pemboran Volume 2 Edisi 1, Bandung, Penerbit Insitut Teknologi Banding (ITB) 2012.

Soong, A., Arriffin, M. F., Rosland, H. A., Halliburton (2017): Integration of Casing Wear in Casing Design and Stress Analysis Workflow, SPE-187011-MS.

Usmanov, A. R., Shiskin, A. M., Merzlyakov, A. S., Karimov, J. L. O., Fedotov, A. V., Khlebnikov, V. I., (2021): 7-inc Casing While Drilling CWD with Retrievable Hole Assembly BHA, SPE-206438-MS.