BAKER HUGHES - Drilling Fluids Reference Manual

BOREHOLE PROBLEMS
Formulation (typical) for 1 bbl mix:
Water 0.55 bbl
Defoamer
0.15 gallons
Soda Ash
1.22 lbs
Bentone 128 210 lbs
Placement of the Plug
• Run in hole with open ended drillpipe and place the bottom of the drillpipe +/- 1 joint
above the thief zone. Pump the gunk pill down the open ended drill pipe, with 5 bbl water
spacer ahead and behind as spacer. If well-bore pressure or conditions prevent the drill
string being pulled out of the hole, those involved should evaluate the possibility of
displacing this mix through the drill string and bit.
• Displace with drilling fluid until the water ahead reaches the bottom of the drillpipe.
• Close the annular preventer.
• Squeeze gunk with the two cement unit pumps;
• Pump No.1: Pump down DP at 2 BPM
• Pump No.2: Pump down annulus at 0,5 BPM
• Squeeze down total gunk pill volume (until all water is cleared from the drill pipe).
• Pull drill pipe well above gunk.
• Hold the squeeze pressure for 30 to 60 minutes.
• Carefully place weight on the gunk pill to test the pill firmness. A maximum period of 3
hours should be given for the gunk to set up.
MAGNE-SET ® SQUEEZE SYSTEM
Description
MAGNE-SET, used as an alternative to cement plugs, offers these advantages in addition to
quick-mixing. MAGNE-SET can be mixed in the mud pits or slug tank.
• This material may be spotted with the drill bit in place.
• MAGNE-SET has very little effect on the fluid system.
• MAGNE-SET contains no diesel and does not affect the toxicity of the fluid system
as diesel would.
Table 7-3 and Table 7-4 give slurry formulations.
BAKER HUGHES DRILLING FLUIDS
REFERENCE MANUAL
REVISION 2006 7-28