Cement G-HSR

Cement G - HSR is the product obtained from grinding Portland cement clinker (consisting essentially of calcium silicate curing in water - hydraulic calcium silicate) with the presence of only one or several types of gypsum as additive. No other additives except gypsum or water, or both, is ground or blended with this clinker in the manufacturing of cement class G. This product is used as a base cement for oil or gas drilling wells. Cement class G can be categorized into two types: moderately sulfate -resistant and highly sulfate - resistant. Cement G - HSR meets API Spec 10A - 2010 standard, 24th edition.

Properties

Appearance: Gray powder
Bulk density (g/cm3):3.18 ± 0.04

No.	Technical requirement	Unit	Standard	Testing result
I	Chemico-mineral requirements
1	Magnesium oxide, MgO	%	6,0 max.	1,29
2	Sulfur trioxide, SO3	%	3,0 max.	1,86
3	Insoluble residue	%	0,75 max.	0,20
4	Loss on ignition	%	3,0 max.	0,88
5	Tricalcium silicate, C3S	%	48 ÷ 65	61,80
6	Tricalcium aluminate, C3A	%	3,0 max.	1,36
7	Tricalcium aluminate (C3A), (C4AF + 2C3A) Tetracalcium aluminoferrite (C4AF) plus twice the tricalcium aluminate (C3A), (C4AF + 2C3A)	%	24 max.	21,15
8	Total alkali content expressed as sodium oxide (Na2O) equivalent (Na2O + 0.658 K2O)	%	0,75 max.	0,36
II	Physical properties
1	Free-fluid content after 2 hours	(%)	5,9 max.	3,52
2	Compressive strength of cement rock after 8 hours, at 1 atm	Mpa (psi)	2,1min.	5,21 16,49
3	Thickening time test	min	90 ÷ 120	103
4	5 ÷30 minute stirring period	Bc	30 max.	16

Application

Cement G - HSR is used to fill annular space between the well bore and casing or between the casings in oil and gas wells. Cement G - HSR can also be used in the construction of offshore structures, buildings as it can resist water intrusion containing sulfate ions.

Requirements for environment and safety

Cement G - HSR is non-toxic and does not affect marine ecosystems. Personal Protective Equipment (PPE) is required when handling this product.

Packing

Cement G - HSR is packed in 1 ton big bag or as requested by clients. This product should be stored in dry, cool places

Please send infomation

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