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This report provides an update on the activities and progress of the Subcommittee on Well Cements in investigating and developing a standardized process for characterizing the mechanical behavior of cement under confinement. The report includes information on the workgroup charge, members, 2016 activities, 2017 action plan and risks, acknowledgements, and discussion points.
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API Subcommittee on Well Cements (SC-10) Triaxial Mechanical Properties Testing of Oilwell Cements 2017 Winter Meeting Progress Report
Today • Workgroup charge • Members • 2016 Activities • 2017 Action plan & risk • Acknowledgements • Discussion
Workgroup Charge • Investigate and develop a technical report on the characterization of the mechanical behavior of cement under confinement • Workgroup deliverable • Submit a standardized process to be incorporated into the existing TR related to “Mechanical Behavior of Cement” by 2018 Winter Meeting.
2016 Workgroup Activities Recap WG Meetings and Sponsors • April 26 – B. Hughes • May 19 – B. Hughes • June 01 – CSI • Aug. 25 – B. Hughes • October 19 – OFITE API Reporting • 2016 Winter Meeting • 2016 Summer Meeting • 2017 Winter Meeting
Mechanical Testing Program – Phase 1 • Participating Laboratories • Baker Hughes, Chevron, CSI, Halliburton, OFITE, Schlumberger, Trican, CURISTEC • Base Slurry Design • Class G and fresh water • Medium weight slurry (Class G & Poz blend) & Lightweight designs was discussed, decision was to defer until conclusion of Class G & Water testing.
Mechanical Testing Program – Phase 1 • Curing Temperature = 50 deg. C • Curing Pressure = 3000 psi • Curing Time = 14 days • Temperature and pressure be reduced over a 72 hour period to minimize induced stress on the samples. • Confining Pressures • All Labs are to test using the following confining pressures • 250 psi, 500 psi, and 1000 psi. • Test Specimens should adhere to a 2:1 ratio (length to diameter)
Mechanical Testing Program – Phase 1 • Labs are to follow their established testing procedures • All labs have the freedom to add additional confining pressures beyond the three required pressures stated above. Tests results can be submitted as well. • All tests will be tested under a “drained condition”. • Labs have freedom to test under an “un-drained condition” as well and test results can be submitted • Phase 1 Testing Deadline: April 01, 2017
Workgroup 2016 Highlights • Workgroup members increase = 63% • Action Items completed = 96% • 2016 Workgroup meetings = 5 • Positive participation in all meetings • Average participation = 10 (56%) • Laboratory testing has started • Phase 1 testing will identify if additional testing is needed
Identified Risks • Completion of tri-axial testing on time • Data analysis indicates extensive testing is required • Document generation and review. • Workgroup agreement/consensus • Time requirements
Acknowledgements • Baker Hughes, CSI, and OFITE for sponsoring conference rooms and call-in numbers • Dyckerhoff Cement – for supplying cement samples and shipping to labs • John Buflod – API Sharepoint Support • Workgroup members for their time, expertise and active participation.
Minutes: • 10:45 Session called to order • A. Badalamenti presented recap for: • 2016 activities, 2017 phase 1 testing plan and action plan • Discussion items • Phase 1 testing regime, report standardization and data analysis • Matthew Goodine asked about allowing each lab to use their processes for testing regime – A.B explained that a standardized process will be used to prepare the cement slurry, cure, depressurize/cool the sample, etc. Load frame loading and testing will be as per each labs’ processes and procedures
Minutes: • Discussion items • James Heathman asked how would the test data would be collected and analyzed – Axel Bois explained that the “raw test” data would be used • Rick Lukay – suggested that a standardized test report be created to ensure that all needed data is collected and received – Anthony and Axel will generate the test report and distribute it to the lab. • James Heathman suggested that each lab use the same cement design • Maggie Benge - explained that a standard slurry design is being developed and sent to each participating lab. • Rick Lukay – motion for session closure – motion was seconded, no objections. – meeting adjoined 11:10 am.
April 26 Meeting Summary • Safety Moment: Driving in high water • Discussed • Activities required to achieve team charge • Various Tri-Axial testing procedures submitted by team members • Created sub-workgroups • Literature review • Workflow process • Developed action plans and deliverables • Requested API Sharepoint site be created for workgroup for document control and communication
May 19 Process Mapping Meeting Summary • Location: Baker Hughes Tech. Center • Discussed and developed mechanical testing process map and identified tasks • Distributed map and minutes to workgroup members for review and suggestions
June 01 Meeting Summary • Location: CSI • Safety Moment – Sun Protection & Hurricane Season • Literature Search Team Report • Team cited 20 publications • Publication information distributed to workgroup members • Action plan will be develop during August meeting. • Process Mapping Team Report • Reviewed & discussed workflow process map • Process map was accepted • Reviewed tasks submitted for Sample Preparation and Perform Test sections only • Test Evaluation section review delayed to August meeting • Action Plan created and distributed to workgroup
2016 Summer Meeting Report Summary • Team representative: Paul Sonnier – CSI • Workgroup Key Messages to API • Workgroup is making positive and measureable progress • Workgroup agrees that initial delivery date was very aggressive – 2017 Winter Meeting • Work group request a revised delivery date target of 2018 Winter Meeting • 2016 focus is completing the process map, and developing co-op testing plan and protocols • 2017 focus will be co-op testing, data analysis and final report submission to API • Laboratory participation is essential to meet deliverable • Approval to extend the delivery of a technical report from winter of 2017 to winter of 2018 was voted on and accepted.
August 25 Meeting Summary • Location: Baker Hughes • Safety moment: Back to School Driving • Completed review and discussions related to Process Map/Tasks • Reviewed and Re-grounded of WG charge • Established strategy for WG document development • TR-7 & 10B will be used as main references and report template • Laboratory testing target January 2017
October 19 Meeting Summary • Location – OFITE • Safety Moment: • Daylight Saving Time Change • Discussed and developed cement slurry and testing parameters to be used for Phase 1 testing program • Participating Laboratories • Baker Hughes, Chevron, CSI, Halliburton, OFITE, Schlumberger, Trican, CURISTEC