Calcium aluminate cement (usually termed cement fondue or limonite) can be used in applications where the temperature is expected to exceed 700°F such as in-situ combustion wells where the temperature may reach 2,000°F. Thus, neat cement is placed across the producing formations and behind the shoe joint and filler cement is used to fill the remainder of the annular space that requires cement. In fact you should remember that a pressurized metal container does not always simulate down hole conditions. Cementing operations were usually per- formed by the rig crew. In order to function in this capacity we must become fundamentally familiar with the oil well cementing properties . The hydraulic flow properties are the rheological properties of the cement necessary to make critical velocity calculations. But with curing time increased, the mechanical properties of ce- ment improved significantly, strength increased with the in- crease of carbon fiber amount; when cement curing exceeded 7 d, with the ongoing of hydration, the strength of sample C2 and C3 increased substantially, compared with the sample P1, the compressive strength, flexural strength and splitting ten- sile … Moreover, The  API  Spec  10  has  pressure and  temperature schedules for compressive strength tests based upon depth and anticipated temperature gradient. If some of the mix water is lost to a permeable formation through filtration, then the pumping time can be less than anticipated. The cement pastes with 40–60%wt metakaolin presented good strength … The actual mix water from the location should be used in the thickening time tests whenever possible. The water to cement ratio is the ratio of the weight of water to a unit weight of dry cement. Increasing pressure will shorten thickening time although its effects are less pronounced than temperature. Please subscribe with your e-mail to get latest educational articles and job vacancies. In addition to that, density can be increased by adding weight material such as barite and hematite. The above results showed that oil well cement with halloysite nanotube possess excellent mechanical properties including high strength and good toughness. Refer to individual data sheets for complete details. This oil well cement property (API fluid loss) test is conducted at 100 psi differential through a 325 mesh screen. The cement used for oil well cementing differs from concrete or masonry work in that it consists of a thin slurry of primarily cement and water. Cement is accelerated about the same way that it is retarded by the manufacturer. The yield is the volume of cement mixture created per sack of initial cement. The cement used in oil wells must possess three primary properties. They usually consist of portland or pozzolanic cement (see below) with special organic retarders to prevent the cement from setting too quickly. Also Silica mix with portland cement can be used to temperatures around 750°F. All design considerations should be directed at these functions. Factors that could influence the reaction rate are: pressure, temperature, concentration of each chemical or ionized particles present, and the chemical nature of the combined chemicals present. All API compressive strength tests are run at 3,000 psi when the depth is below 4,000 feet since there is little change in  the  expected compressive strength. A commonly used water to cement ratio is 0.46, which means 46 grams of water to 100 grams of dry cement. A bad cement job can make an  otherwise sound  investment a  disaster. It is performed by composition adjustment, particle size adjustment, and by the addition of a chemical accelerator. 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