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Consumers' Checkbook/Center for the Study of Services (doing business as Consumers’ CHECKBOOK) is an independent, nonprofit consumer organization.It was founded in 1974 [1] in order to provide survey information to consumers about vendors and service providers.
A rubber plug used to separate the cement slurry from other fluids, reducing contamination and maintaining predictable slurry performance. Two types of cementing plug are typically used on a cementing operation. The bottom plug is launched ahead of the cement slurry to minimize contamination by fluids inside the casing prior to cementing.
Consumer Reports Best Buy Drugs is available free on Consumer Reports Health.org. It compares prescription drugs in over 20 major categories, such as heart disease, blood pressure and diabetes, and gives comparative ratings of effectiveness and costs, in reports and tables, in web pages and PDF documents, in summary and detailed form.
Resist chemical deterioration of cement; Confine abnormal pore pressure; To increase the possibility to hit the target; Cement is introduced into the well by means of a cementing head. It helps in pumping cement between the running of the top and bottom plugs. The most important function of cementing is to achieve zonal isolation.
By far the most common type of cement is hydraulic cement, which hardens by hydration of the clinker minerals when water is added. Hydraulic cements (such as Portland cement) are made of a mixture of silicates and oxides, the four main mineral phases of the clinker, abbreviated in the cement chemist notation, being: C 3 S: alite (3CaO·SiO 2);
Consumer Reports has put out its first-ever brand ranking on used vehicles as well as its 10 top picks of the best individual used cars priced under $20,000 — two of which are General Motors ...
It was less expensive than a cement truck dedicated to only carrying cement and allowed the trucks used to continue to be adapted for other things. [2] Concrete mixers have continued to advance. Recently, research detailing a forward simulation model of an energy-saving concrete mixer using hydraulic technology was released based on Matlab ...
When it comes to product reviews, Consumer Reports is the gold standard. Gathering data from 300,000 vehicles from 2000-2023, CR’s team of engineers, journalists, researchers and scientists has ...