دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a chemical additive that reduces the setting time of cement. See cement, cementing materials.

n: A downhole tool used in conjunction with a jar to store energy that is released suddenly when the jar operates.

A chemical that speeds up the rate of a chemical reaction. Most common are the accelerators used in cementing.

an energy increasing device, with sudden energy release, used in a jarring string while fishing.

n: 1. in general, a substance added in small amounts to a larger amount of another substance to change some characteristic of the latter. In the oil industry, additives are used in lubricating oil, fuel, drilling mud, and cement. 2. in cementing, a substance added to cement to change its characteristics to satisfy specific conditions in die well. A cement additive may work as an accelerator, retarder, dispersant, or other reactant.

n: The agent put into the drilling fluid in order to change some performances of the drilling fluid or slurry.

a compound incorporated into a gas, liquid, or solid system to alter the properties for a particular purpose.

n: See accelerator.

an additive such as calcium chloride, and salt in high concentrations that speeds the set of cement.

n: a material added to cement to change its properties. Chemical accelerators, chemical retarders, and weightreduction materials are common additives. See cementing materials.

n: The general name of treating chemical for adjust the performance of cement slurry.

n: See accelerator.

n pi: a slurry of portland cement and water and sometimes one or more additives that affect either the density of the mixture or its setting time. The portland cement used may be high early strength, common (standard),or slow setting. Additives include accelerators (such as calcium chloride),retarders (such as gypsum),weighting materials (such as barium sulphate),lightweight additives (such as bentonite),or a variety of lost circulation materials (such as mica flakes).

n: The bonding material for cementing.

n: a hydraulic tool used in conjunction with a jar and made up on the fishing string above the jar to increase the power of the jarring force.

n: the tool of jam release and prevent sticking that using the shocking foce to the tubing in the hole .



a hydraulic tool used in combination with a jar to increase the impact of the jar on the fish.