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7
SECTION 3
TIMED FILTRATION STICKING TEST PROCEDURE
(Numbers in [ ] refer to Fig. 1 thru 5)
The general procedure for assembling and operating the instrument is basically the same whether the
test described in Section 3 or Section 4 is being run. Ensure that the apparatus is clean. Refer to
Section 6.
The timed filtration sticking test uses a predetermined sticking time to determine the sticking coefficient.
In this test the stuck tendency coefficient K
st
is determined. If the flat plate [9] is used R = 1 with edge
effects considered. Refer to Step B-3 below. If the radius'd plate [15] is used, the stuck surface may be
less than R = 1, R = 1, or R = 1 with edge effects depending on the cake building characteristics of the
drilling fluid. Refer to Step B - 3 below. In this test the bulk sticking coefficient K
sc
is determined.
A. Cell Assembly
1. Place a sheet of heavy-duty filter paper, Part #N8805 [16], locking mesh (if used) [13]), rubber
gasket [10], and plastic ring [11] inside the cell.
NOTE: The locking mesh will lock the drilling fluid cake to the paper so that it
cannot invalidate the test results by sticking to the torque plate face
and breaking loose from the filter paper.
2. Holding the gaskets centered, screw the hold-down retainer ring [8] over the gaskets. Use the
ring wrench [3], and tighten securely.
3. Insert the threaded end of one valve stem [17] into the bottom center hole of the cell and
screw in as far as possible hand tight. .
4. Fill the cell to the scribe line with the drilling fluid sample to be tested. This is 1/4 in. (6.3 mm)
from the top.
5. Set the cell on its stand [1], mating two of its holes into the stand tips. If the valve stem in the
lid is in line with the stand columns, this will interfere with the lever [4]. Rotate the cell 90 .
6. Select either the flat bottom torque plate [9], or the radius'd torque plate [15]. Refer to Section
5-B "PLATE SELECTION" for effects of each type of torque plate. Insert the stem of torque
plate [9] or [15] through the lid as far as possible with the polished surface facing down from
the inside of the lid. Be careful not to cut the "O" Ring [21].
7. Assemble the cell cap [6] and torque plate onto the cell, making sure the "O" ring [22] is
properly seated in the lid.
8. Secure the cell to the stand using screws [26]. This will facilitate tightening of the cell cap and
torque wrench usage by one person.
9. Tighten the cell cap, Refer to Fig. 3.
10. Insert the second valve stem [17] into cell cap. Close the valve hand-tight.
11. Set the CO
2
assemblies [2] over the top end of the top valve stems [17] and insert the locking
pin [27].