Multi-Set Production Injection Packer
The Inflatable Multi-Set Production-Injection Packer is used for isolating zones in open-hole or in casing. The tool is re-settable and may be used for testing, treating, production, or injection of several zones with each trip into the well. This tool is designed for long-term downhole production or injection applications.
The Inflatable Multi-Set Production-Injection Packer may be used
in vertical, deviated, or horizontal wells. No rotation is required
to set the packer, however right-hand rotation is required to unset
the packer.
There are several options available for re-setting multi-set packers.
These include:
- Re-set Darts along with a perforated plug catcher are used when pumping or testing must take place through the tool.
- An expendable ball may be used.
- A standing valve may be used.
- A Wireline plug may be used.
- A solid Pumpout plug or bull plug may be used when no pumping or testing through the packer is required.
Inflatable packers elements for these tools are 1.67 m. (66 Inches) in length. High strength aircraft cable is used to provide good expansion characteristics in washed out or irregular well bores. Cable reinforcement allows these inflatable packer elements to return very close to the original run-in diameter while providing high differential pressure capabilities. The Packer elements are designed in such a way that bulging due to high differential pressure is less likely to occur. Due to superior bonding between the cable and rubber these elements lose less rubber down hole.
Applications
WATER SHUT-OFF
Multi-Set packers may be used for short-term or long-term production
to block water encroachment zones in a well. As the life of a well
increases, water coning may occur. Also, water production may start
occurring from fractures or channels. Inflatable packers provide
an effective seal in open hole or in casing, to block this unwanted
water production.
PRODUCTION
Multi-Set Inflatable Packers are also very effective for production
applications. The packer serves two purposes when used for these
applications. Firstly, the inflatable packer element provides a very
effective seal in open hole or in casing. Secondly, the element anchors
solidly in open hole or in casing, to prevent tubing rotation or
reciprocation at the tool.
INJECTION
Multi-Set Inflatable Packers may be used for injection of fluids
in disposal wells. A large internal bore is provided through the
tool. For long term disposal applications it is very important that
materials used in manufacturing these tools, are able to resist highly
corrosive environments typically associated with disposal wells.
TESTING
Multi-Set Inflatable Packers may be used for testing zones in open
hole or in casing. Zones may be isolated to determine oil, gas, or
water production from certain sections. Testing of each zone will
determine which fluid is produced from that section. Also, testing
will determine flow rates the zone. Electronic Pressure-Temperature
Recorders as well as Shut-In Tools, may be used with the system to
provide additional subsurface data from zones being tested.
TREATING
Multi-Set Inflatable Packers may be used for treating zones in open
hole or in casing. Typical treatments performed through the tool
would be fracturing, acidizing, polymer injection for water shut-off,
and acid washes.
For treating applications, a circulating valve is used above the
tool. This valve is opened to allow treatment fluid to be pumped
from surface, to the tool. Once the treatment fluid is spotted to
the tool, the circulating valve is closed, and treatment fluid is
then injected to the zone located below the packer.
SQUEEZE CEMENTING
Multi-Set Inflatable Packers may be used for squeeze cementing zones
in open hole or in casing. These packers provide greater clearance
for running tools into a well where there are restrictions such as
casing patches. In addition, the long seal section provided with
an inflatable element is more effective in older wells where casing
may be partially corroded. These packers are particularly effective
for squeeze cementing required to abandon old wells.
For squeeze cementing applications, a circulating valve is used above
the tool. This valve is opened to allow cement to be circulated from
surface, to the tool. Once the cement is spotted at the tool, the
circulating valve is closed, and cement is then squeezed into the
zone located below the packer.
PRESSURE TESTING CASING PATCHES
Multi-Set Inflatable Packers are very effective for testing casing
patches. Run-in diameter is reduced when a casing patch is set. An
inflatable packer is designed with a reduced Outer Diameter (O.D.),
which makes it possible to pass through a casing patch.
For testing a casing patch, the single set inflatable packer is normally
set directly below the patch. After the packer has been set, pressure
is applied to the annulus above the packer.
| Available Sizes | ||||||
| Element O.D. | Tool I.D. | Element Seal Length | Thread Connections |
|||
| in | mm | in | mm | in | m | |
| 3.12 | 79 | 0.75 | 19 | 51 | 1.29 | 2 3/8" EUE |
| 3.50 | 89 | 1.25 | 31 | 51 | 1.29 | 2 3/8" EUE |
| 4.25 | 108 | 2.00 | 50 | 48 | 1.22 | 2 3/8" EUE |
| 5.50 | 140 | 2.50 | 63 | 49 | 1.24 | 2 3/8" EUE 2 7/8" EUE |
| 6.75 | 171 | 2.50 | 63 | 49 | 1.24 | 2 3/8" EUE 2 7/8" EUE |
| 7.50 | 191 | 3.50 | 89 | 48 | 1.22 | 3 1/2" EUE |
| 9.38 | 238 | 4.50 | 114 | 47 | 1.19 | 3 1/2" EUE |
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