Key topics presented include: • HPHT wells are now being developed by a larger number of operators • Casing and connections provide the barriers to maintain well integrity. Material and Connection Selection depend on the risk profile • The optimum value is defined by the operator following the assessment of the risks This presentation gives a brief overview of the selection, qualification and manufacturing of both the pipe and connections, including additional aspects that should be included for HPHT wells. For the complete presentation, visit http://bit.ly/M4I0Pa. For more information, please visit http://www.hphtwells.com/ss-brochure.

1. IQPC
HPHT Casing and Tubing – Standards
and Specifications
Stuart Cole
Technical Manager
September 2011
Vallourec Group

2. Introduction
 HPHT wells are now being developed by a larger number of
operators.
 Casing and connections provide the barriers to maintain
well integrity. Material and Connection Selection depend on
the risk profile
 The optimum value is defined by the operator following the
assessment of the risks.
RETURN
VALUE =
RISK
 This presentation gives a brief overview of the selection,
qualification and manufacturing of both the pipe and
connections, including additional aspects that should be
included for HPHT wells.
2 Vallourec Group

3. HPHT Materials
 Current Standards/Specifications for tubulars
● Manufacturing Standards:
• ISO 11960/ API 5CT 8th Edition
• ISO 13680/ API 5CRA
– Both standards give the details of the chemistry, mechanical performance
and states data on how it is to be manufactured
– PSL levels to designate the quality standards that the pipe is produced too
● Specifications
• Proprietary supplier specifications
• Customer specifications
– These can take into account unique aspects requested by the customer or
provided by the supplier
● Design
• ISO 10400
– Provides the formulas for the pipe performances
 However no specification or standards are tailored to meet
HPHT requirements, therefore a combination of specifications
is required
3 Vallourec Group

4. HPHT Materials
 Design
1. Select material that provides required level of corrosion performance
2. Simulations provide mechanical performance required , for HPHT wells
non-standard tubulars are required to meet the requested load cases
3. An iterative process with compromises is demanded for the casing
selection i.e. 9 5/8” 53.5# with 8.5” drift, may not suitable due to reduction
in safety factors, therefore alternative options are needed:
 Specifications
 Utilise Non-Standard pipe dimensions,
 10” 73.9# with 8.5” drift there are tolerances/variations
● Within each specifications and 90%min wall, 9 7/8” 66.9# with 8.5” drift and
• Manufacturing (PSL level, Length, wall thickness, drift value)
90% min wall
 Modify steel grades:
• Quality Control (NACE corrosion testing, NACE A/ NACE D)
 Sour service, high to discuss with restricted yield strengthof the (7ksi)
● Each operator needs collapse, CRA, the supplier to agree range
 Update/modify calculation input values
specifications used for the manufacture of the pipe
 Utilise the specification can provide an enhanced ISO 10400 collapse
● Optimising modified calculations for pipe performance i.e. product from the
value
current specifications
 During the design and specification phase each of the above
criteria needs to be considered. This can provide an enhanced
product providing greater value for HPHT wells.
4 Vallourec Group

5. HPHT Materials – Risk Reduction
1. Qualification tests - Materials
● Material Qualification Tests can be customer-specific.
● Typically, a major oil company requests the following tests:
Localised Corrosion Tests Four-Point Bent Beam Tests Slow Strain Tests
Tensile Tests @ Elevated Temperature NACE A , D –in standard + field-specific solutions Collapse testing
Providing both Pass /Fail and K1SSC result
2. Manufacturing HPHT plan
 Develop specific plan with Supplier
Detail knowledge to enhance Quality assurance and
performance properties
 Include customer specific requirements
 i.e. Marking, Inspection, Dimensional control including wall
thickness, drift
 Additional testing
 Connection datasheets
 Pipe datasheets
 Utilise the enhanced specification levels within the standards
 Inspection level to be performed i.e. API 5CT PSL level 2/3
 Unique Quality plan developed
5 Vallourec Group