What is ISO/TR 10400 about?
ISO/TR 10400 illustrates the formulae and templates necessary to calculate the various pipe properties given in International Standards, including:
- Pipe performance properties, such as axial strength, internal pressure resistance, and collapse resistance
- Minimum physical properties
- Product assembly force (torque)
- Product test pressures
- Critical product dimensions related to testing criteria
- Critical dimensions of testing equipment, and
- Critical dimensions of test samples
For formulae related to performance properties, extensive background information is also provided in ISO/TR 10400 regarding their development and use.
Application of performance property formulae in ISO/TR 10400 to line pipe and other pipe is restricted to their use as casing/tubing in a well or laboratory test and requires due caution to match the heat-treat process, straightening process, yield strength, etc.
Note 1: The design formulae in ISO/TR 10400 are not to be understood as a manufacturing warranty. Design formulae are a reference point for users to characterize tubular performance and begin their own well design or research of pipe input properties.
Note 2: ISO/TR 10400 is not a design code. It only provides formulae and templates for calculating the properties of tubulars intended for use in downhole applications. ISO/TR 10400 does not provide any guidance about loads that can be encountered by tubulars or about safety margins needed for acceptable design.
Who is ISO/TR 10400 for?
ISO/TR 10400 on the formulae and calculations for the properties of the casing, tubing, drill pipe, and line pipe used as casing or tubing is beneficial for:
- Drilling engineers, engineering geologists, and mining engineers
- Geochemists, geophysicists, and geoscientists
- Roustabouts and roughnecks
- Hydrographic surveyors
- Casing crew
- Manufacturers of drill pipes
Why should you use ISO/TR 10400?
Performance design of tubular for the petroleum and natural gas industries, whether it is formulated by deterministic or probabilistic calculations, compares anticipated loads to which the tubular can be subjected to the anticipated resistance of the tubular to each load. Either or both of the load and resistance can be modified by a design factor.
Deterministic and probabilistic approaches to performance properties are addressed in ISO/TR 10400. The deterministic approach uses specific geometric and material property values to calculate a single performance property value. The probabilistic method treats the same variables as random and thus arrives at a statistical distribution of a performance property. A performance distribution in combination with a defined lower percentile determines the final design formula. ISO/TR 10400 assists the user with limit state formulae which are useful for determining the resistance of an individual sample whose geometric and material properties are given, and design formulae which are useful for good design based on conservative geometric and material parameters.
Overall, ISO/TR 10400 is helpful as it provides formulae and templates for calculating the properties of tubular intended for use in downhole applications which can be beneficial for your business. The design loads and safety factors are selected based on historical practice, local regulatory requirements, and specific conditions.