1. WG on Composite Cements: Calgary Meeting 2017
Calgary, January 2017, Heiko Plack

2. Proposed Agenda
Update WG roster/member list
Status of Annex B „Composite Well Cements“
Miscellaneous
Way forward

3. WG Members (Current Emailing List)
Informative:
John Buflod, API
Deryck Williams, Chevron
Members (interested parties?):
Dan Mueller, ConocoPhillips
Bernard Fraboulet
André Garnier, Total
Jerry Calvert
James Reid, Oxy
Glen Benge
Gunnar De Bruijn, SLB
David Stiles, ExxonMobil
Erick Cunningham, BP
Bill Ulrich, HolcimLafarge
Rick Lukay, OFITE
Joe Shine, SaudiAramco
Scott.Saville, Ametek
Luis Padilla, Chevron
Felipe Padilla, BJ Services
Scott Podhaisky, LafargeHolcim
Simon James,
Anand Krishnan, Cemex
Grégory Galdiolo,
Antonio Bottiglieri, Baker Hughes

4. Status of Annex B „Composite Well Cements“ Recent History
May 2016: Ballott closed and passed
June 2016: Summer Meeting in DC
all comments addressed
decision to „pre-publish“ the Annex as an amendment to current API Spec 10A
July 2016: submission of final draft to API including all changes,
corrections and amendments as addressed by the WG

5. Status of Annex B „Composite Well Cements“ Recent History
October 2016: observation that API Spec 10A is still also an ISO
document, thus pre-publishing the Composite Annex is not possible for legal reasons
decision to add the approved Annex directly to the next (25th) edition of Spec 10A and get it out ASAP.
January 2017 Handed over to the WG on Rewrite API Spec 10A and API RP 10B for inclusion into 25th edition

6. Status of Annex B „Composite Well Cements“ Amendment For Slurry Mixing
The current Annex B draft does not specify mixwater percentages for testing composite cement slurries.
Filling the Waring Blender with too little or too much slurry may result in differing mixing energy
Decision made in Austin to add a corresponding sentence (Heiko)
Proposal (Heiko & Bernard) as discussed already on the last API Spec 10A rewrite meeting:
For composite cement classes without specified mix-water percentages (see Annex B), the mix volume of the slurry shall be adjusted to 600 ml by using the corresponding quantities of cement and mix-water at ±0.5 g.
To be amended in section Mixing Quantities, underneath Table 5

7. Miscellaneous - API Spec 10A, Classes A & C - Adjusting LOI & IR?
Note: Most ordinary portland cement (e.g. ASTM Type I/II) also contain up to 5% limestone, … as permitted by most of the applicable construction cement standards as “minor constituents”

8. Miscellaneous - API Spec 10A, Classes A & C - Adjusting LOI & IR?
ASTM Types I and II are widely used for OWC in US. Most of these cements contain limestone as a minor constituent. So the industry does pump limestone-containing cements on a regular basis.

9. Miscellaneous - API Spec 10A, Classes A & C - Adjusting LOI & IR?
Monogrammed API Classes A & C are often produced from ordinary construction cement clinker. However, separate grinding and storing is needed because API Spec 10A limits the addition of minor constituents (limestone) by specifying low(er) LOI and IR.

10. Miscellaneous - Loss On Ignition (LOI)
EN 197-1
ASTM C150
API Spec 10A
current
proposal*
Cement types
CEM I
CEM III
Type I
Type II
When limestone is an ingredient
Class A
Class C
LOI
≤ 5,0%
max. 3,5%
max. 3,0
* Condition:
Calcium carbonate content of limestone = minimum 75 wt-%

11. Miscellaneous - Insoluble Residue (IR)
EN 197-1
ASTM C150
API Spec 10A
current
proposal*
Cement types
CEM I
CEM III
Type I
Type II
When limestone is an ingredient
Class A
Class C
Insoluble residue (IR)
≤ 5,0%
max. 1,5%
max. 0,75
* Condition:
Calcium carbonate content of limestone = minimum 75 wt-%

12. Way forward discussion
There is a common understanding that the Work Group on Composite Cements should stay active. Heiko as the chairman of the WG will decide case-by-case before every upcoming API meeting whether the WG will join or not.