Oil-well cement. Pt. 2. Here are the special cements

Journal Article · Mon Feb 01 00:00:00 EST 1971 · Oil Gas J.; (United States)

OSTI ID:5965073

McLeod, H O

The fundamental properties of Portland cement can be altered by additives to handle the special conditions found in oil-well cementing. Temperatures above 106$F degrade Portland cement. Pozzolans added to cement reduce this retrogression. To handle the high temperatures in wells today, because of thermal-recovery operations, the following cements or blends are used: (1) blends of API cements with 30 to 40% silica for up to 460$F or higher; (2) pozzolan- Portland cement blends (50-50 by volume) with 30 to 40% silica for up to 600$F or higher; and (3) calcium aluminate cement (a refractory cement used with or without silica flour) for 700$F to 2,000$F. Cement systems for low temperature (less than 80$F) are now very important because of increased arctic exploration. API Classes A, C, and G cements are adequate for low temperatures above freezing where mix water is warmed and 2 to 3% CaC1D2U is used to accelerate setting and compressive strength developments. These systems may be adequate for cementing competent perma- frost formations where melting will cause no problem. But where ice lenses are present or incompetent formation exist, cement-slurry temperature must be kept low. Two systems are satisfactory for frozen zones: high alumina cements and gypsum-Portland cement blends. Other special cement systems are described. (13 refs.)

• Research Organization: Tulsa Univ
• OSTI ID: 5965073
• Journal Information: Oil Gas J.; (United States), Vol. 17:4
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
OIL WELLS
CEMENTS
CALCIUM CHLORIDES
CHEMICAL COMPOSITION
PERMAFROST
PETROLEUM
PORTLAND CEMENT
WATER
WELL CASINGS
ALKALINE EARTH METAL COMPOUNDS
BUILDING MATERIALS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHLORIDES
CHLORINE COMPOUNDS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
MATERIALS
OXYGEN COMPOUNDS
WELLS
020300* - Petroleum- Drilling & Production