Accelerators

Cement setting times can be adjusted with accelerators.  Accelerators speed up the time required for a cement slurry to become hardened in a reaction process that shortens WOC (Wait On Cement) time and provides faster drill out, thus saving rig time.  This reaction process is known as cement hydration whereby water induces chemical reactions that ultimately lead to bonding. Accelerators essentially speed the reaction with water, which in turn reduces (a) thickening time and/or increases (b) early compressive strength development after set.  Accelerators that cause both effects can be considered "total" and those producing only one effect can be called "partial".   Most known accelerators are total.  A useful partial accelerator would increase strength without altering thickening time.

Cal-Seal™ 60 Accelerator
Can be blended with Portland cements to shorten setting time and improve the expansion characteristics of Portland cements.

Accelerators

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Summary Summary Cal-Seal™ 60 Cement Accelerator - A4
Cal-Seal™ 60 accelerator is blended with Portland cements. It helps shorten the slurry’s setting time and can improve its expansive properties.
Summary Summary Calcium Chloride (CaCl2) Accelerator
Calcium chloride (CaCl2) additive is the most widely used and accepted accelerator for all classes of cement. It is widely used in shallow, low-temperature formations to speed the setting of cement slurries.
Summary Summary Calcium Chloride (CaCl2) Accelerator (Russian)
Хлористый кальций (CaCl2) представляет собой наиболее широко применяемую и признанную добавку, ускоряющую схватывание цементных растворов всех классов. Этот продукт широко используется в характеризующихся неглубоким залеганием и пониженной температурой пластах как средство ускорения схватывания и затвердевания тампонажных растворов.
Summary Summary Cal-Seal™ 60 Cement Accelerator
Cal-Seal™ 60 accelerator is blended with Portland cements. It helps shorten the slurry’s setting time and can improve its expansive properties.
Summary Summary Econolite Additive (Russian)
Russian version of sales data sheet on Econolite
Summary Summary Sodium Chloride (NaCl) Accelerator - A4
Sodium chloride (NaCl), commonly known as salt, can be used in low concentrations to accelerate the setting of cement. In high concentrations, NaCl retards the setting of most cements, improves bonding of cement to shales, and minimizes damage in zones sensitive to fresh water. A defoamer should be added to dry blends or to mixing water to minimize foaming and air entrainment.
Summary Summary Econolite Additive
Halliburton's Econolite additive is used in oilwell cementing to increase volume, decrease density, provide a detergent action, and reduce costs; the resulting slurries are widely used as filler cement. The additive is dry-blended, in finely ground powder form, with API cement Classes A, C, H, and Halliburton LIGHT cement at the rate of 1 to 3% by weight. Econolite additive cannot be used with calcium chloride (accelerator).
Summary Summary Econolite Additive A-4
Halliburton's Econolite additive is used in oilwell cementing to increase volume, decrease density, provide a detergent action, and reduce costs; the resulting slurries are widely used as filler cement. The additive is dry-blended, in finely ground powder form, with API cement Classes A, C, H, and Halliburton LIGHT cement at the rate of 1 to 3% by weight. Econolite additive cannot be used with calcium chloride (accelerator).
Summary Summary Sodium Chloride (NaCl) Accelerator
Sodium chloride (NaCl), commonly known as salt, can be used in low concentrations to accelerate the setting of cement. In high concentrations, NaCl retards the setting of most cements, improves bonding of cement to shales, and minimizes damage in zones sensitive to fresh water. A defoamer should be added to dry blends or to mixing water to minimize foaming and air entrainment.
Summary Summary Calcium Chloride (CaCl2) Accelerator - A4
Calcium chloride (CaCl2) additive is the most widely used and accepted accelerator for all classes of cement. It is widely used in shallow, low-temperature formations to speed the setting of cement slurries.
Summary Summary GasCon 469™ Additive - A4
GasCon 469™ is a liquid cement additive designed to help increase slurry stability and control free water. This additive can be used at bottomhole circulating temperatures (BHCTs) between 40° and 300°F (4° and 149°C).
Summary Summary GasCon 469™ Additive
GasCon 469™ is a liquid cement additive designed to help increase slurry stability and control free water. This additive can be used at bottomhole circulating temperatures (BHCTs) between 40° and 300°F (4° and 149°C).
Summary Summary Calcium Chloride (CaCl2) Additive
Decreases thickening time, increases early strength, and shortens time spent waiting on cement.
Summary Summary Accelerators
Accelerators are used to shorten the set time of cement slurries or accelerate the cement setting. The most common cement accelerator is calcium chloride.
Summary Summary Cal-Seal™ 60 Accelerator
Can be blended with Portland cements to shorten setting time and improve the expansion characteristics of Portland cements.
Related Information

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