Halliburton’s HR®-817 cement retarder is a non-lignin, high-temperature retarder that has been North Sea approved (biodegradable, non-toxic, and does not bioaccumulate) and is compatible in a wide range of additive combinations in API cements. It is capable of retarding cement at temperatures between 220°F to 350°F (104°C to 177°C). HR-817 retarder is an economical alternative to commonly used high-temperature retarders. It demonstrates good strength development and linear response in the 220°-350°F (105°-177°C) temperature range. HR-817 retarder has good anti-gas-migration qualities and has shown long zero-gel times and short transition times. It is intended for primary cementing jobs of liner and production casing.
HR-817 cement retarder can provide the following advantages:
Economical alternative to high-temperature retarders.
Short transition times.
Good early strength development.
Compatible with most additives, including fluid-loss additives, dispersants, salt, etc.
Acceptable in environmentally sensitive regions.
Effective at higher temperatures when extended with HR®-25 retarder.
The CST™ cement support tool, tubing release tool (TRT), bottomhole kickoff assembly (BHKA) disconnect tool, and bottomhole kickoff assembly (BHKA) tool system were designed to aid in setting balanced and competent cement plugs during remedial and primary cementing operations.