TOC® - Thixotropic Oilwell Cement

Typical Properties and Field Applications

TOC technology was commercialized in 2016 successfully and has been applied in various oil and gas fields in the world. It has been proved to be effective in cementing oil or gas wells with the following conditions and properties:

Temperature:
 BHST 104‑215°F (40‑102°C)
Density:
 11.20 ppg to 14.50 ppg (1.35‑1.75 g/cm3)
Mix‑water:
 Fresh water
Gel strength:
 YP: 30‑100 lbs/100ft2
Further information about field jobs is described in documented “Case History of TOC Technology”.
Typical thixotropic properties of TOC slurries are shown in the following Table and Figures.


R1‑B1‑S1 RPM 3 6 30 60 100 200 300 PV (cP) YP (lbf/100ft2)
80°F Ramp Up 14 20 42 48 54 62 68 43 32
Ramp Down 20 26 50 54 56 63 68
110°F Ramp Up 45 49 135 179 195 222 236 182 86
Ramp Down 30 42 120 160 185 213 236
10 sec gel strength
(110°F) 		33 10 min gel strength (110°F) 100
1 min gel strength (110°F)
(100 rpm shearing) 		54

Precautions and HSE Considerations

TOC additive (KCM038) plays the most important role in cementing jobs with TOC slurry. In addition, fluid loss agent (KCM039), retarder (KCM040) and expanding agent (KCM025LT, KCM025HC) are engineeringly developed for TOC system because KCM038 is not compatible with regular fluid loss control agents, dispersant and retarders.

The laboratory procedures, quality assurance program and guidelines for field mixing and handling of TOC systems are described in TOC fluid manual.

Refer to the technical sheet and SDS of the respective product for the health, safety and environmental information of each product.