API SPEC 10A:2010 pdf download
API SPEC 10A:2010 pdf download.Specification for Cements and Materials for Well Cementing.
3.9
compressive strength
force per unit area required to cause a set cement sample to fail under compression
3.10
consistometer
device used to measure the thickening time of a cement slurry under temperature and under pressure
filtrate
liquid that is forced out of a cement slurry during a fluid loss test
3.12
free fluid
coloured or colourless liquid that separates from a cement slurry under static conditions
3.13
slurry container slurry cup
container in an atmospheric or pressurized consistometer used to hold the slurry for conditioning purposes or for the thickening-time test
3.14
thickening time
time after which the consistency of a cement slurry has become so high that the slurry is considered unpumpable
NOTE The results of a thickening-time test provide an indication of the length of time a cement slurry remains pumpable under the test conditions.
4 Requirements
4.1 Specification, chemical and physical requirements
4.1.1 Classes and grades
4.1.1.1 General
Well cement shall be specified using classes A, B, C, D, G and H and the grades: ordinary (0), moderate sulfate- resistant (MSR) and high sulfate-resistant (HSR).
A well cement that has been manufactured and supplied in accordance with this part of ISO 10426 may be mixed and placed in the field using water ratios or additives at the user’s discretion. It is not intended that manufacturing compliance with this part of ISO 10426 be based on such field conditions.
Processing additives, set modifying agents or chemical additives used to reduce chromium (VI) shall not prevent a well cement from performing its intended functions.
4.1.1.2 Class A
This product is obtained by grinding clinker, consisting essentially of hydraulic calcium silicates, usually containing one or more forms of calcium sulfate as an interground additive. At the option of the manufacturer, processing additives may be used in the manufacture of class A cement, provided that such materials in the amounts used have been shown to meet the requirements of ASTM C465.
This product is intended for use when special properties are not required and is available only in 0 grade, similar to ASTM C150, type I.
4.1.1.3Class B
This product is obtained by grinding clinker,consisting essentially of hydraulic calcium silicates, usually containingone or more forms of calcium sulifate as an interground additive. At the option of the manufacturer，processingadditives may be used in the manufacture of class B cement, provided that such materials in the amounts usedhave been shown to meet the requirements of ASTM C465.
This product is intended for use when conditions require moderate or high sulfate resistance and is available inboth MSR and HSR grades,similar to ASTM C150, type l.
4.1.1.4Class c
This product is obtained by grinding clinker, consisting essentially of hydraulic calcium silicates, usually containingone or more forms of calcium sulfate as an interground additive. At the option of the manufacturer, processingadditives may be used in the manufacture of class C cement,provided that such materials in the amounts usedhave been shown to meet the requirements of ASTM C465.
This product is intended for use when conditions require high, early strength and is available in O, MSR and HSRgrades,similar to ASTM C150, type lll.
4.1.1.5Class D
This product is obtained by grinding clinker, consisting essentially of hydraulic calcium silicates, usually containingone or more forms of calcium sulfate as an interground additive. At the option of the manufacturer, processingadditives may be used in the manufacture of class D cement, provided that such materials in the amounts usedhave been shown to meet the requirements of ASTM C465.Further, at the option of the manufacturer, suitableset-modifying agents may be interground or blended during manufacture.
This product is intended for use under conditions of moderately high temperatures and pressures and is availablein MSR and HSR grades.
