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Re-Plex Re-Plex* anionic-scavenger is a cationic polyelectrolyte used in the Drilplex* AR Plus system. Re-Plex additive has a strong and irreversible affinity for suspended and dissolved organic matter which protects the mixed-metal-oxide (MMO) bentonite complex from being disrupted by organic contamination. Typical Physical Properties Physical appearance�������������������������������������������������������������������������������������������������������������������������������������������������������������������������� Straw-colored viscous liquid Specific gravity���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������1.08-1.09 pH������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������ 5.5 Solubility in water����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������Miscible Flash point������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������>212°F (100°C) Melting/freezing point����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������27°F-32°F (-3°C-0°C)) Applications Contamination of MMO-base fluids with organic materials, derived from decayed organic matter and which are also found naturally in peat and geologically young coals, can lead to complete collapse of the unique elevated low-shear rheology of these fluid types. Historically, this sensitivity to even relatively small concentrations of anionic contaminants has limited the application of MMO-base fluids in certain geographical locations. Re-Plex anionic scavenger was specifically developed to improve the tolerance of MMO-base fluids to anionic contamination. The Re-Plex product can be added at concentrations of 0.25 to 0.5 lb/bbl (0.7 to 1.4 kg/m3) to a fully formulated fluid. To avoid overtreating the system it is recommended that additions of Re-Plex scavenger are made only on a remedial basis to condition a contaminated system. Higher treatment levels should be pilot tested, and may be necessary with higher levels of organic contamination. Advantages • Re-Plex additive is effective at low concentrations (but the effective treatment level is dependent on the severity of organic contamination) • Specially designed polymeric scavenger for anionic contaminants • Can help protect the MMO-bentonite complex from being totally and irreversibly collapsed by organic contaminants • The addition of Re-Plex scavenger can fully restore rheology to a MMO-base fluid after anionic contamination • Can be used to enhance the system tolerance to anionic additives Limitations • The use of Re-Plex product should be pilot tested prior to making additions to the active system • The bentonite-MMO complex should be allowed to fully develop prior to the addition of Re-Plex scavenger • Gelplex* or an equivalent premium grade bentonite is recommended • Additions of Re-Plex product should be made slowly over a number of circulations to avoid localized flocculation of the fluid • Overtreatment with Re-Plex additive can lead to increased rheology and can have a negative impact on fluid-loss control. It is therefore recommended that Re-Plex scavenger be used as a remedial treatment when anionic contamination of the Drilplex AR Plus system is suspected. • TrolPlex* and FloPlex* Plus fluid-loss-control-additives are more compatible with Re-Plex additive than FloPlex additive Toxicity and Handling Bioassay information is available upon request. Handle as an industrial chemical, wearing protective equipment and observing the precautions described in the Material Safety Data Sheet (MSDS). Packaging and Storage Re-Plex scavenger is packaged in 20-L plastic drums. Store in a dry, well-ventilated area. Keep container closed. Keep away from heat, sparks and flames. Store away from incompatibles. Sensitive to cold below 32°F (0°C). This information is supplied solely for informational purposes and M-I SWACO makes no guarantees or warranties, either expressed or implied, with respect to the accuracy and use of this data. All product warranties and guarantees shall be governed by the Standard Terms of Sale. Nothing in this document is legal advice or is a substitute for competent legal advice. ©2008 M-I L.L.C. All rights reserved.* Mark of M-I L.L.C. FPB.1806.0911.R2 (E) P.O. Box 42842 Houston, Texas 77242-2842 www.miswaco.slb.com E-mail: [email protected]