BAKER HUGHES - Drilling Fluids Reference Manual

Baker Hughes Drilling Fluids
3. With a plastic pipette, add 0.5 ml of sample (mud filtrate) to the beaker and swirl
the contents to ensure proper mixing. If mud filtrate is going to be saved for future
fluoride electrode testing the filtrate should be retained in a plastic container. The
mud filtrate should never be stored in a glass container due to the tendency of the
aluminum complex to adhere to the glass surface.
4. With 3ml pipette or 10cc syringe, add 3 ml of acetic acid/potassium acetate buffer
to the beaker.
5. Swirl the solution to ensure proper mixing.
Allow the solution to sit for 5 minutes prior to testing.
Repeat steps 1-5 for each sample analysis.
Sample Analysis
1. Rinse the electrode with distilled water between each analysis.
2. Blot probe dry, do not wipe dry.
3. Prepare samples as previously described in “D” above. Place the electrode in the
sample and record sample readings after 1 minute.
4. Check calibration every 4 hours by analyzing the 100 standard.
5. Rinse electrode with distilled water and blot dry between each test.
Note:
Should your concentration readings be greater than 100, you may HAVE FORGOTTEN to
add buffer.
Reinecke Salt Test Procedure for Residual MAX-GUARD in PERFORMAX Filtrates
Equipment and Materials;
1. Reinecke salt
2. Volumetric flask – 100 ml
3. Deionized water
4. Pipettes
5. Syringes (optional)
6. Sample of MAX-GUARD
Procedure
1. Prepare a solution of the Reinecke Salt indicator solution by dissolving
approximately 3% by weight of the Reinecke salt material into deionized water (or
0.75 g per 24.25 ml water). Small amounts of the solution should be prepared
since the shelf life is about 7–10 days at temperatures below 65°F. Shelf life
decreases rapidly above this temperature. It is recommended to store the solution
in a refrigerator, if possible, when not in use. (Please note: you will see some
apparent insoluble materials at the bottom of the container; ignore).
2. In a small vial or bottle, place about 2 ml water, 8 drops of Reinecke salt solution
and 0.5 ml of the mud filtrate and shake.
Baker Hughes Drilling Fluids
Reference Manual
Revised 2006 3-103