Download Supreme Amplifier - Gotco

Gotco International
Preliminary Information:
Caution: The Gotco Supreme Amplifier
is shipped in the closed or “cocked”
position. It is installed between the
running string and the “jarring mass,”
which should be located directly above
the Gotco Supreme Fishing Jar. Once the
Amplifier is elevated in suspension, the
mandrel will open two or three inches,
prior to the Supreme Fishing Jar is
elevated.
Once the Amplifier is lowered downhole, the temperature will expand the
silicon or “energizing fluid,” and
close this gap, increasing the working
stroke of the tool.
Rig Up:
Fill the Gotco Supreme Amplifier
with the supplied, Gotco Amplifier
Fluid and test the tool as per testing
guidelines in this manual, using a
suitable test frame and tester.
Examine the Amplifier to check for
any damage parts or leakage, and to
make sure that it is properly filled.
It is recommended that not less than
two (2) joints of drill collars and not
less than four (4)
joints of heavy-wt. drill pipe be run
between the Supreme Fishing Jar and
the Supreme Amplifier, or between
the Jar and the working string. If this
can’t be avoided, then avoid highimpact jarring loads.
Jarring Procedures:
The Gotco Supreme Amplifier impact
is controlled by the amount of stretch
in the running string and the weight
of the drill collars installed above the
Supreme Fishing Jar. This is
controlled by the operator on the rig
floor. It is necessary to install the
same, similar weights (mass) above
the Amplifier, as you do the Fishing
Jar, for a minimum of 1,000 feet to
lessen the reverse inertia or kinetic
energy on the Fishing Jar and
Amplifier Assemblies. Apply the
minimum pull load above the weight
of the drill collars and running string,
to effect a sufficient blow.
Caution: Do not exceed the
published, Maximum Pull Load at
any time during the jarring
operations! See the “Strength and
Data” section of this manual.
Jarring Procedure:
1.
2.
3.
Initial blow: set the string
down to ensure the jar is
fully closed. Raise the string,
applying the desired overpull on the Jar.
Set the break and wait for
the Jar to strike a blow. This
could take a few seconds to
several minutes, depending
on certain hole conditions.
Close the Jar and repeat the
process, increasing the load
as required to free the stuck
fish.
4.
The Gotco Supreme Amplifier can
transmit full torque in left and right
hand rotation, at all times, while
maintaining full circulation through
the assembly.
After Jarring, Rig Maintenance:
Normally, no action is necessary for
Rig-down. In most cases, only minor
maintenance is required on the rig
floor. After inspecting the rig floor
for any leaks (Jar or Amplifier), lay
the Amplifier down on the derrick
floor.
Caution: The Amplifier should not
be left hanging from the elevators for
extended periods of time.
Reminder: The Gotco Supreme
Amplifier should be located above all
the drill collars, heavy weight drill
pipe, or any other concentrated mass,
that is immediately above the
Supreme Jar. This weight will be used
to provide the necessary impact at the
stuck point when jarring. The
working string, above the Amplifier,
should not have a weight per foot
3
change for at least 1,000 feet of string
directly above the Superior Amplifier.
The only exception is for a lighter
joint screwed directly into the
Amplifier for flexibility, when
required for “bending.” The jarring
results will be much better, if there is
no significant .weight above the
Amplifier. Excess mass or weight
above the Amplifier can cause the
impact to occur, resulting in damage
to the Amplifier, Jar, Bottom Hole
Assembly components, or the fish
being retrieved. When working in
oversized or deviated holes, the
Supreme Jar and Amplifier should be
isolated from these areas, by using a
more flexible joint of string. This will
help to reduce damage to the
equipment and protect the tools from
fatigue failure and bending loads.
It is recommended that not less than
two (2) joints of drill collars and not
less than four (4)
joints of heavy-wt. drill pipe be run
between the Supreme Fishing Jar and
the Supreme Amplifier, or between
the Jar and the working string. If this
can’t be avoided, then avoid highimpact jarring loads.
Immediately remove the Gotco
Supreme Amplifier from the fishing
string and flush all mud from the
internal bore, paying close attention
to mud or debris inside the Washpipe.
After Jarring Procedures:
(Dressing & Maintenance):
The Gotco Supreme Amplifier should
be disassembled, cleaned, inspected
and re-outfitted, after prolonged field
use.
Equipment Required:
1. A suitable vise and tong.
2. Over-head crane with a 1 ton
(2,000 pound) minimum lifting
capacity.
3. Pipe wrenches of various sizes for
outside diameters and internal
parts.