BAKER HUGHES - Drilling Fluids Reference Manual

Water Based Drilling Fluids
Table 3-17
PYRO-DRILL Product Concentration Guidelines for Various Fluid Types
Concentration Product Freshwater
Brackish
Water
10.0 lbm/gal MIL-TEMP
CHEMTROL X
PYRO-TROL
KEM-SEAL
POLYDRILL
12.0 lbm/gal MIL-TEMP
CHEMTROL X
PYRO-TROL
KEM-SEAL
POLYDRILL
15.0 lbm/gal MIL-TEMP
CHEMTROL X
PYRO-TROL
KEM-SEAL
POLYDRILL
18.0 lbm/gal MIL-TEMP
CHEMTROL X
PYRO-TROL
KEM-SEAL
POLYDRILL
0.25-0.50
0.50-2.00
0.25-2.00
0.75-1.50
N/A
0.50-0.75
1.00-3.00
0.50-2.00
0.50-1.00
N/A
0.75-1.25
3.00-5.00
0.50-2.00
1.00-2.00
N/A
1.50-2.00
4.00-6.00
1.00-2.00
0.25-0.75
N/A
SALT
WATER
Chlorides
(20,000-
190,000
mg/L)
0.25-0.50
0.50-2.00
0.50-2.00
0.75-1.50
N/A
0.50-0.75
1.00-3.00
0.50-2.00
0.75-1.50
N/A
0.75-1.25
3.00-5.00
0.50-2.00
0.50-1.00
N/A
1.50-2,00
4.00-6.00
1.00-2.00
0.50-1.00
N/A
NOTES:
Saturated
SALT
WATER
0.25-0.50
1.0-2.00
1.0-3.00
1.0-2.00
3.0-6.00
0.50-0.75
2.0-4.00
1.0-2.00
1.0-2.00
3.0-6.00
0.75-1.25
4.0-6.00
1.0-2.00
0.75-1.50
3.0-6.00
1.5-2.00
5.0-8.00
1.00-2.00
0.75-1.50
3.00-6.00
High
Hardness
Ca++/Mg++
(5,000±
mg/L)
0.25-0.50
0.50-2.00
1.00-3.00
4.00-8.00
0.50-1.00
2.00-4.00
1.00-2.00
4.00-8.00
0.75-1.50
4.00-6.00
0.75-1.50
4.00-8.00
1.50-2.50
5.00-8.00
0.75-1.50
4.00-8.00
Lime
Base
pH ≥ 11.0
0.50-0.75
1.00-3.00
∗
1.00-3.00
4.00-8.00
0.75-1.00
3.00-5.00
*
1.00-2.00
4.00-8.00
1.00-2.00
5.00-7.00
*
1.00-2.00
4.00-8.00
1.50-3.00
6.00-8.00
*
0.75-1.50
4.00-8.00
• All concentrations are in lbm/bbl. To convert lbm/bbl to kg/m 3 , multiply lbm/bbl by
2.85.
• Product concentration ranges should build stable fluids to 500 o F (260 o C).
• * pH levels of 11.0 or above will hydrolyze PYRO-TROL ® and reduce its effectiveness.
• PYRO-VIS is to be used as a supplementary viscosifier only as needed. Typical
treatments are 0.25 to 2.00 lbm/bbl, depending on density, salinity, and hardness levels.
• AVOID OVERTREATMENT.
N/A = Not Applicable.
System Maintenance
Drilling in high-temperature environments requires close monitoring of solids content, solids
type, and particle-size distribution. Daily retort analyses and physical observations at the rig site
should be supplemented with weekly particle-size distribution analyses (at a Field Service
Laboratory) if penetration rates are slow, otherwise laboratory monitoring should be more
frequent. This will enable the engineer to closely monitor solids control equipment efficiency.
Reference Manual
Baker Hughes Drilling Fluids
3-64 Revised 2006