Oil Well Cement Class G

Characteristics

 Ideal density and setting time :

• Lower Consistency
• Good resistance to sedimentation as pre-mixing concrete of Class G cement
• Good pumpability as pre-mixing concrete of Class G cement
• As pre-mixing concrete of Class G cement, when injecting the concrete to the related position of oil well with target temperature and pressure, it can be rapid set and harden and is easy to make mechanical strength.
• Good impermeability, stability and corrosion resistance when its concretes are solidified.
• When Class G Cement is used together with accelerator for setting or set-retarding admixture,

It can be suitable for the larger range of well depth and the bigger range of temperature.

Physical Analysis

Mixing Water (mass fraction of cement):  44%

Free Fluid Content: 5.9% Max

Compressive Strength (8hours at temp. 38C, Atm. pressure): 2.1MPa(or 300PSI) Min;

Compressive Strength (8hours at temp. 60C, Atm. pressure.): 10.3MPa(or 1500PSI) Min;

Consistency (15-30minutes stirring period): 30Bc Max;

Thickening Time: 90 minutes Min, 120 minutes Max

API Class G (HSR) cement

Benefits:

·       Thickening Times controllable with additives to enable placement to 550º F (287º C).

·       Excellent Retarder Response for higher economic benefit in mix design.

·       Low Free Fluids for cement integrity and durability.

·       High Sulfate Resistance for high durability under harsh conditions.

·       Non-Setting for uniformity in the column.

·       Consistent Quality for slurry design portability.

Storage, Transportation and Packing

 Storage: to be stored in dry cool storage and not mix foreign body

• Storage: to be stored in dry cool storage and not mix foreign body
• Transportation: as per the common goods; classification for conveyance – not to be required; not to allow the packages to be fallen down or damaged
• Packing: composite 50kgs bag, and / or 1MT, 1.5MT or 2MT jumbo bag