coring

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coring

[′kȯr·iŋ]

(metallurgy)

A variable composition of individual crystals across a casting, due to nonequilibrium growth over a range of temperature; the purest material is near the center.

(petroleum engineering)

The use of a core barrel (hollow length of tubing) to take samples from the underground formation during the drilling operation; used for core analysis.

coring

Removing a core from a concrete structure or rock foundation, for test purposes.

coring

A phenomenon that occurs in some oil coolers at low atmospheric temperatures when the oil congeals and restricts the flow through the cooler. If this happens, a rise in oil temperature will take place without a corresponding rise in coolant or cylinder head temperature. In this case, the RPM should be increased and/or the shutters closed.

References in periodicals archive ?

As for stability, because springs are integral to most wheeled vehicles, it is important that the suspension of the truck or trailer be isolated during the coring process.

Once you have the core drill properly adjusted, coring operations can begin.

As a rule of thumb, an 18-inch diameter coring drum should rotate between 180-200 rpm.