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Triaxial Mechanical Properties Testing of Oilwell Cements - Progress Report

This document provides an update on the progress of the Subcommittee on Well Cements (SC-10) in investigating and developing a standardized process for testing the mechanical behavior of oilwell cements under confinement. The report includes information on workgroup members, testing results, and discussions, as well as the plan for 2019.

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Triaxial Mechanical Properties Testing of Oilwell Cements - Progress Report

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  1. API Subcommittee on Well Cements (SC-10) Triaxial Mechanical Properties Testing of Oilwell Cements 2019 Winter Meeting Progress Report

  2. Today • Workgroup charge • Members • Testing results • Discussion • 2019 plan

  3. 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

  4. WorkGroup Members

  5. August2018 Workgroup Activities • Participants and venues • OFITE conference room (6 members) • Conference call (6 members) • Key Activities • Team discussed testing methods used in Phase 1 • Identified that one main source of uncertainty may come from the calibration of the testing equipment • Use of standardized material to isolate testing related factors from cement sample related factors

  6. April 2018 Workgroup Activities • Key Activities • Two materials have been identified: Aluminum (E = 10 Mpsi; v=0.33) and Delrin (E < 0.5 Mpsi) • A third material has been looked for in the between, with no success • It has been proposed to serialize the calibration sample for further use: The objective could be to standardize the calibration of the testing equipment • Calibration samples would be needed for all plug size • Size received range from 1-in diameter to 6-in diameter • The lab have provided with the size of the plugs they can test

  7. August2018 Workgroup Activities • Key activities: • Second source of uncertainty could come from the parallelism and perpendicularity of the plugs • Third source of uncertainty could come from the sample saturation • It has been proposed to prepare a listing of the information to be provided on a test for comparison purposes.

  8. August2018 Workgroup Activities

  9. August2018 Workgroup Activities

  10. August2018 Workgroup Activities • Action Plan • Calibration samples • Ship calibration material samples • Perform triaxial tests on calibraton samples • Analyze and report • Parallelism and sample saturation investigation report • To be discussed during next meeting • Listing of the information to be provided on a test for comparison purposes • To be discussed during next meeting • To serve as a starting point for the report • Next meeting in February

  11. Suggestions and Questions

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