Packers for permeability tests
Packers for permeability tests
Wireline Packer System
Packer
Type "A"
The Wireline Packer System is a time-saving method for conducting permeability testing during core drilling.
The test is carried out with the drill string in place, reducing the time required to test in open or unstable formations.
Available for all makes of wireline core barrels (N, H and P), Wireline packers are easily repaired in the field in just minutes.
The wireline packers incorporate a bumper that rests inside the throat of the drill bit.
This positions both packers and protects the drill bit. A compression cap ''T'' on the Seal Tee Assembly prevents pressure loss around the composite cable during testing.
The composite cable itself is composed of a high pressure nylon tube for inflation and a cable to lower and retrieve the wireline packer.
These packers are available in a simple version (Type A and A+), or a double packer (Type B)
Specifications
| Wireline core barrels diameter | N | H | P | S |
| Bore-hole diameter (mm) | 76 | 96 | 122 | 146 |
| Packer nominal diameter (mm) | 42 | 56 | 72 | 85 |
| Packer inner diameter (mm) | 17 | 20 | 35 | 35 |
| Max. working pressure (bar) | 40 | 35 | 30 | 35 |
Inflatable packer for wire-line core barrels
This system is an easy way of positioning a Geopro inflatable packer below the wire-line core bit in open hole for conducting permeability testing.
This packer assembly incorporates a positioning ring which rests on the drilling bit inner shoulder.
Packer
Type "B"
Double packers WTP
Geopro has developed a double packer “WTP” especially designed for Lougeon testing. It is available in sizes from
42 up to 170mm.
The main components of the double packer type “WTP” are:
The upper packer which is equipped with one inflation adapter and one plugged port into the fixed end. The tube of the upper packer is perforated in its bottom part. Water testing is conducted by injecting water into the ground through the holes of this perforated tube.
The lower packer equipped with a fixed end at its top and a central tube. There is no inflation port on the fixed end.
The two packers are connected together to build the double packer. The distance or test zone between the two packers can be easily increased in the field using an extension tube “ER”.
Inflation fluid flows inside these extension tubes to inflate the bottom packer. No outside inflation line is required.
