What does the API Screen Number NOT tell us?

The API Screen Number is a single number which defines solids separation potential under specific test conditions. It does NOT define how a screen will operate on a shaker in the field as this will depend upon several other parameters such as fluid type & properties, shaker design, operating parameters, ROP, bit type, etc.

2014-08-27T17:19:16+00:00By ||

What is the D100?

a. The D100 cut point of a screen is the particle size at which no particles will pass through the screen. b. D100 is a single number determined from a prescribed laboratory procedure – the results of the procedure should yield the same value for any given screen. c. The D100 should not be compared [...]

2014-08-27T17:17:27+00:00By ||

Screen Conductance

Conductance, measured in kilodarcies per millimeter (kD/mm), defines a Newtonian fluid’s ability to flow through a unit area of screen in a laminar flow regime under prescribed test conditions. All other factors being equal the screen with the higher conductance number should process more flow.

2014-08-27T17:10:13+00:00By ||

D50 Cut Point

The D50  cut point of a screen is the particle size at which half of those particles reporting to the screen will pass through the screen and half will be retained.

2014-08-27T17:11:20+00:00By ||


Mesh, as it relates to a piece of woven wirecloth, is a measure of the number of holes in a linear inch (such as 100 mesh) or in a linear inch in each direction (such as 100 x 60 mesh).

2014-08-27T17:07:48+00:00By ||

API Screen Number

API Screen Number is determined using a specific test procedure (asset out in API RP 13C).The test a specifically graded sample of Aluminum Oxide which is passed through a stack of sieves including the test sieve  and mounted on a Tyler Ro-Tap®.  The method determines the D100 cut point of the test screen and relates [...]

2014-08-27T17:06:32+00:00By ||
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