Transcript Attachment 28a - 17TR8 Winter Meeting HPHT Design Guidelines 2016

API Winter Meeting 2016
API 17TR8: High-pressure High-temperature (HPHT)
Design Guidelines
Working Items of 2nd Edition
• Materials workgroup
–
Material characterizations (standardized testing protocols)
–
Welding
–
NDE
• Design Verification workgroup
–
Extreme & Survival Conditions
–
Fatigue input parameters - GoM
–
Hydrostatic pressure tests (Deepstar Project 12302)
• Design Validation workgroup
• API 17TR8 – 2nd Edition is targeted for June 2016 Ballot
Materials Work Group
• Materials Work Group met several times in 2015 to:
– Address materials related issues in 17TR8-SRRR 2nd Edition
– Form the following work groups:
1.
Material Characterizations (Paul Bunch, Steven Shademan, Ravi
Krishnamurthy and Arshad Bajvani)
2.
Welding (Nash Ubale)
3.

Overlay Weld

Fabrication Weld
NDE: Flaw Sizing (Curtis Dickinson)
Material Characterizations
• Material Characterization section has been developed to be added
as an annex to API 17TR8
• Material Test Procedures Draft Document
1. Defines test environments of:
•
Seawater with CP
•
Typical GoM Production Environment for Gas Wells and Oil Wells
2. Defines Environmental Screening per SSRT – NACE TM0198-2011
•
Materials which pass SSRT defined as not susceptible to environment
•
Materials not susceptible to environment;
 S-N fatigue, FCGR (if required) and FT to be performed in air at
appropriate temperature.
 S-N fatigue in air to be validated with a limited number of tests in
environment
•
Materials Susceptible to environment;
 S-N fatigue and FCGR (if required) to be performed in environment at
appropriate temperature at a low frequency. Limited S-N tests in air.
 FT to be performed in environment at appropriate temperature
Material Characterizations
• Material Test Procedures Draft Document (cont’d)
3. Defines Strain Limit Environmental Reduction Factor per SSRT
•
SSRT ratios for % elongation and RA used as reduction factor for Strain
damage material parameters defined in ASME Sec VIII, Div 2 and Div 3
4. Defines test parameters for Fracture toughness Testing, KIC and
KIEAC
•
Test Types for Environmental KIEAC; rising displacement and WOL
•
Krates for rising displacement tests in environment
5. Defines Test Parameters for Fatigue S-N and da/dN vs ∆K in air and
environment
•
Defines frequencies
•
Defines R ratios
6. Defined Strain Damage Test Procedures
•
Tests conducted using notched tensile at design temperature
•
Reduction factor per SSRT result
7. Tensile, True Stress-True Strain testing and Physical Properties
Material Characterizations
• Material Characterization section was circulated for work group
review and comments (11/8/2015).
• Comments received and will be addressed by 1/30/2016
Material: Welding
• Welding requirement section has been developed by the task
group to be added to the existing API HPHT 17TR8 document:
1. Acknowledge ASME IX & API 6A (PSL-3) base case requirements
for HPHT weldments
2. Determine if there are additional variables that need to be included
3. Identify additional testing for HPHT weldments per API 17TR8
(Article 6.3 & 6.4)
4. Develop qualification (WPS/PQR) philosophy for HPHT weldments
5. Provide these HPHT welding guidelines to API 17TR8 committee for
review/approval
• The Overlay Weld requirement section was sent out to members
for review and comments (11/6/2015)
• Comments have been collected and will be addressed by the task
group members (1/30/2016)
Material: NDE
• Conventional Ultrasonic Sizing Methods
– ID Creeping wave Methods
– Tip Diffraction Methods
– Bimodal Methods
– HALT / HAST Methods
 Refracted Longitudinal and Shear Wave Methods
 Time of Flight (TOF) Diffraction
 Phased Array
• No one sizing method is best for sizing flaws of any depth, height,
and/or type
• NDE General guidance will be developed for API 17TR8 – 2nd
Edition (1Q 2016)
Design Verification: Extreme / Survival
• Verbiage drafted and implemented into existing 17TR8
• Defined Definitions and Probability of Occurrence
• Defined Design Factors
– L-E & E-P
Design Verification: Extreme / Survival
• Defined Function and/or Performance Post-Event(s)
• Defined Potential Impact on Fatigue Life
– S-N & Fracture Mechanics
• Defined Bolting/Fasteners Design Factors
– L-E & E-P
TABLE 3. PRESSURE CONTAINING BOLTING DESIGN STRESS ALLOWABLES
Elastic-Plastic (LRFD)(1)
Operating Condition
Linear-Elastic
(membrane)
Global Criteria
w/o Thermal
Loads
w/ Thermal
Loads(2)
Normal
0.83 × Sy
1.45
1.27
Extreme
0.9 × Sy
1.33
1.17
Survival
1.00 × Sy
1.2
1.05
NOTES:
(1)
(2)
The usage of the factors are defined as: LRFD × (P + Dx + T)
Material properties at elevated temperature are inherent to the material models used the
LRFD analysis
Design Verification: Fatigue Input Parameters
• Objectives:
− To expedite the fatigue calculation process for Gulf of Mexico
application
− Identify and standardized input parameters
• Last Work Group Meeting: October 28, 2015
• Fatigue Input Parameters Template Completed
• Request for input/information was circulated to industry on November
4, 2015. Response requested by March 2016.
• Fatigue task group will review the data received and decide what to
include into the TR8 document.
• The time to complete this process will depend on the industry
response and amount of data we receive.
• Estimated completion: Summer 2016.
Design Verification: Fatigue Input Parameters
API 17TR8 Fatigue Input Parameters - GoM
1.
Design Life
2.
Water depth range
3.
M etocean conditions
4.
Soil model / data (P-y)
5.
M anufacturer’s
•
Factory Acceptance Testing (FAT) Pressure Test
•
System Integration Testing (SIT) Pressure Test
6.
25 years
6000’ - 9000’
Central GoM : Block 21 - 22 (API RP 2M ET)
Central GoM : Block 21 - 22, Upper or Low er Bound
[range, frequency]
[range, frequency]
Fatigue Properties
[material characterizations]
7a. Drilling Operation
Fatigue Loads
7b. Completion / Workover (Intervention)
Fatigue Loads
7c. Production
Fatigue Loads
a.
Vessel RAO (response amplitude operator)
•
M ODU
[magnitude]
•
Semi-Sub
[magnitude]
a.
a.
Pressure:
•
Tests
 API Std 53
b.
b.
[range, frequency]
Vessel RAO
•
M ODU
•
Service Vessel
(Intervention)
[magnitude]
[magnitude]
Pressure:
•
Tests
 API Std 53
[range, frequency]
b.
Vessel RAO
•
TLP
•
Spar
•
FPSO
Pressure:
•
Operation
•
Tests
•
Start-up
•
Shut-in
•
Pigging
[magnitude]
[magnitude]
[magnitude]
[range, frequency]
[range, frequency]
[range, frequency]
[range, frequency]
[range, frequency]
c.
Temperature (250F - 350F)
•
Operation
[range, frequency]
c.
Temperature (250F - 350F)
•
Operation
[range, frequency]
c.
Temperature (250F - 550F)
•
Operation
[range, frequency]
•
Start-up
[range, frequency]
•
Shut-in
[range, frequency]
d.
Cyclic External Load
•
Bending
•
Tension/Comp.
•
Shear
d.
Cyclic External Load
•
Bending
•
Tension/Comp.
•
Shear
d.
[magni, freq, Bin]
[magni, freq, Bin]
[magni, freq, Bin]
[magni, freq, Bin]
[magni, freq, Bin]
[magni, freq, Bin]
Cyclic External Load
•
Bending
•
Tension/Comp.
•
Shear
[magni, freq, Bin]
[magni, freq, Bin]
[magni, freq, Bin]
Abnormal Loads
•
Extreme
[magni, freq, Bin]
Abnormal Loads
•
Extreme
[magni, freq, Bin]
Abnormal Loads
•
Extreme
[magni, freq, Bin]
e.
e.
e.
DeepStar Project: Hydrostatic Pressure Tests
• Objectives:
−
−
Industry’s studies to assess each design path of HPHT
design flow chart and the effects of:
•
varying hydrostatic test pressures on equipment’s
strain limit damage/equivalent plastic strain and
•
its effects on fatigue life estimation and environmental
cracking resistance
These studies are to include validation testing program of
the analytical results
• DeepStar’s Project 12302 – 20ksi Systems, incorporated
17TR8 objectives into their project work scope.
−
Project Champion: Chris Kocurek (COP)
DeepStar 12302 Executive Summary
20K working pressure for subsea equipment has been in discussion for
several years now gaining more and more traction within the various
operators.
This CTR will perform the design verification of a representative 5” 20K
TEE, per API SC17 TR8 along with a proposed validation program.

This exercise will provide an example analysis that provides
independent usage of API SC 17 TR8.

Additionally, this CTR would have current 20K contributors and
operators comment on the scope of work and the outputs of
verification.

This CTR is to help put into practice and provide independent design
verification as outlined in TR8.
DeepStar 12302 Project Status
 Generation of a functional specification, FMECA
 Conduct pre-workshop to present proposed design methodology to
DeepStar members and solicit input on gaps and path forward.
 Design verification of 5” 20K tee body, flange, bolting & gasket
 Proposed validation program, schedule, and cost.
 Workshop for initial results and proposed validation program review.
 Investigate the Effects of Hydrostatic Test Pressure Magnitude
 Load monitoring approach recommendations
 Cladding – NDE & Welding requirements, potential improvements
 Development of potential extreme and survival limits
 Comparison of Design Life to Total Life
 Post-Workshop: present verification results, solicit gaps, path forward
Design Validation
• All groups to provided general failure mode list if available to share
– FMC, DNV, Maersk sent data in
• Dec 10: Review general failure modes list with WG and agree on
methodology
– PR3 and PR4 level alignment and detailed requirements
– Failure modes reviewed and categorization work is in progress due to lack of
HPHT specific
• Jan 8: Review general failure modes list
– Finalize categorization of failure modes specific to HPHT environments
– PR2 – PR4 assignment to failure modes provided by WG
– Excel template generated and sent for review and additional comments from
Verification and Validation workgroups
• Feb 5: Finalize general failure modes list to present to TG
– Meeting held in ABS Katy Office