This document provides instructions for calibrating a density meter and summarizes procedures for testing density measurement systems using frac slurry mixtures. It outlines a two-point calibration process using air and water, recording calibration results for restoring meter settings, and calibrating on different fluid types. It also describes preparing frac slurry mixtures with various additives to achieve different densities, measuring the true densities of the mixtures, and using the mixtures to calibrate or test a densometer by taking pressure readings and comparing to known densities. The goal is to practice density measurement techniques and calibrate equipment.

1. Density Meter Calibration
David Aakre
Technologist

2. Density Transmitter/ Meter/ Radiation
Source (Cesium 137)

3. Meter Box/ Thermo

4. Thermo Meter –Set Up
• Two Point Calibration on Air and Water
• DAC codes are used to Calibrate
• Two different procedures to calibrate In-line and Blender.
Procedures are two pages long and contain cal- points for different
size Iron.
• Screen Commands on DAC:
• Simulate 4 MA- Exit Set Up, Press 8, down Arrow. Right arrow to
accept
• Simulate 20 Ma- Exit Set Up, Press 5, down arrow. Right arrow to
accept.
• Clear Simulation- Exit Set Up, press 9, down arrow, right arrow to
accept.
• Calibrate on Base Fluid- Exit Set Up, press 121, down arrow, right
arrow to accept. Take 120 seconds to cal.

5. Record The Results of Thermo
Calibration So You Can Recover Meter
• SGDO MEMORY LOSS RECOVERY PROCEDURE
• MUST HAVE LAST CALIBRATION RECORDED: WATER STANDARDIZATION VALUE AND SLOPE
CORRECTION VALUE
• 1. Erase memory by doing a “74” command. (“Exit Setup”, “74”, ↓ , → , → )
• 2. Input oilfield setup. (“Exit Setup”, “1016”, ↓ , → , → )
• 3. Input pipe ID. (“Exit Setup”, “048003”, ↓ , “??.??”, ↓ , “Exit Setup”)
• 4. Run Standardization cycle. (“Exit Setup”, “121”, ↓ , → ) (Ignore what is in the pipe)
• 5. This was done to set command “flags” in memory.
• 6. Input the “water” value recorded during the last calibration.
• 7. “Exit Setup”, “128003”, ↓ , “?.???E?”, ↓ , “Exit Setup”
• 8. Input the “slope correction“ value recorded from the last calibration.
• 9. “Exit Setup”, “049003”, ↓ , “?.???”, ↓ , “Exit Setup”
• The Meter Should be Restored to last Calibration. So Easy a Green Hat Can Do it. lol

6. Lime Density Meter/ Thermo -Denso

7. Lime Calibration Screen Calibrate on
Air. Fill Detector with Water Cal on H20

8. Lime PPA Calibration Screen/ 11 cal
points

9. Source/ Transmitter( Pre-Amp)

10. Thermo- Pre Amp Set UP

11. BERTHOLD LB 444 Frac Densometer

12. Test Density System with Frac Slurry or
Cement
• Fracturing Chemicals
• Water
• Biocides
• Clay Control
• Polymers
• pH Control
• Fluid Loss Additives
• Conductivity Enhancers
• Gel Stabilizers
• Gel Breakers
• Surfactants
• Crosslinkers

13. Frac Slurries Mixture
• Gel Mixture:
• Buffer- weak acid
• Crosslinker- increases viscosity
• Beryllium
• Guar- Gelling Agent
• Breaker: Oxides, Acids, Enzymes, Breaks gel down in about 30 minutes
• Potassium Chloride
• Sand- 20/40 specific gravity 2.65
• Water PH 7 or 8
• Make sure sand is suspended in mixture- does not fall out
• Slick Water:
• Carbopol 940- High viscosity clear gel- Hair Gels
• Ethylene Glycol
• Caustic soda
• Water PH 7 or 8
• Sand-20/40 specific gravity 2.65

14. Measure Density of Your Mixtures

15. Densometer Testing/ Calibration
• Mix five gallon mixtures of slurry using
different Densities.
• Measure Density of Mixtures with AccuPYC
1340.
• Pour Mixture in densometer and shut in. Add
100 to 150 psi of pressure using a compressor.
• Take and average of five meter readings and
compare to know Density(AccuPYC). Can also
use this process to calibrate a densometer.

16. DAVID AAKRE
TECHNOLOGIST
Practice makes perfect!!!