The following will be used in these
cases :
(a) After a shoot & pull job and prior to
p.o.o.h.
(b) To control & cure losses before a workover,
before pulling completion string in case string is not
parted or has holes in it,
or when pulling an E.S.P. pump out of hole
Mixing Procedure for Temperature 290°F
to 305°F
Allow Pill to agitate for 10-15 mns prior to pumping downhole.
If CaCl
2 is used, add 3-5 ppb extra of
Thermasal-B
thru hopper.
The Pill will be displaced downhole using
Thixsal-Ultra
being minimum 5bbls ahead and 10 bbls behind using 6 ppb
concentration in H
2O.
Polytex AHT is used for temp
over 300°F and up to 335°F.
The
Bridgesal-Ultra temp limitation
is 335°F. If correct formula is used.
Pill volume normally needed is:
½ to 1 barrel per foot of open perfs + volume to
fill inside the casing from plug back total depth up to
+/- 100 to above top open perforation .
Note: Old wells may require up to 2 bbls/foot
to insure sealing.
Thixsal-Ultra Viscous Carrier
Fluid Mixing Procedure
Clean up pit and fix any leak of water to pit.
Place required volume of water {produced or kharita} in
the pit and add the required
Defoam-2.
Add
Thixsal-ultra vis standard
mix hopper at the rate of 3-5 mns / 50 lbs sack allowing
the polymer to yield .
Preparation for the carrier fluid 5 bbls
ahead and 10 bbls behind to avoid contamination, thinning
or roping of above pill .
