BAKER HUGHES - Drilling Fluids Reference Manual

BOREHOLE PROBLEMS
Fluid Density
(lbm/gal)
Diesel
Volume
(bbl)
MIL-SPOT 2
(55-gal drum)
Water
(Seawater or
Drillwater) (bbl)
MIL-BAR (lb)
8.0
29.0
4
14.6
1925
10.0
26.7
4
13.7
6600
12.0
26.4
4
10.5
11,750
14.0
26.0
4
6.9
17,650
16.0
24.9
4
4.5
22,750
18.0
23.4
4
2.5
27,900
NOTES:
1. The relative volumes of oil/water must be adhered to for each density.
2. To obtain fluid densities between those listed in the table is a simple case of extrapolation.
3. All these fluids are designed for yield point values of ± l6 lb f /100 ft 2 . Increasing oil content
decreases viscosity; increasing water content increases viscosity, but also increases tendency of
solids to become water wet.
4. Employ maximum agitation in the slug pit when mixing barite.
Table 7 - 9 MIL-SPOT 2 Material Requirements - Formulation per 50 bbl
Recommended Treatment (BIO-SPOT)
Spot at least enough BIO-SPOT spotting fluid to cover the entire stuck pipe interval, but
preferably not less than 100 bbl (see Table 7-10).
Density
(lb m /gal)
BIO-SPOT
(bbl)
Water (bbl)
MIL-BAR
(sacks)
8.7
100
0
0
10.0
95
0
74
12.0
87
0
185
14.0
80
0
297
16.0
65
7
410
18.0
50
14
523
Table 7 - 10 BIO-SPOT Materials Requirement - Formulation per 100 bbl
Mixing Procedure
1. Thoroughly clean mixing pit. Flush pump and mixing lines with water and drain, if possible, to
minimize dilution of the BIO-SPOT fluid.
2. Add correct volume of BIO-SPOT concentrate for desired volume and fluid density.
BAKER HUGHES DRILLING FLUIDS
REFERENCE MANUAL
REVISION 2006 7-39