1. Georgia Ground Water Resources Conference
AIR-SLUG LOW-PRESSURE PACKER SYSTEM TO FACILITATE CHARACTERIZATION OF FRACTURED ROCK
Georgia Ground Water Resources Conference
University of Georgia
April 25, 2005

2. Head Measurement Hydraulic Test Sample Compressed Air Saprolite
Upper Packer
STRADDLE PACKER
Separation Pipe
Lower Packer
Head Measurement
Hydraulic Test
Sample

3. (LP) STRADDLE PACKER PIPE PLUG (Cherne Industries)
Pipe String
Pipe Plug
PIPE PLUG (Cherne Industries)
Dia cm Length-45cm
Inflation Pressure: 35psi
Differential Pressure: 13psi (9m)
~$ per Pipe Plug
SEPARATION PIPE
~1.4m PVC pipe
5/16” reinforcement rod
Separation Pipe
Pipe Plug

4. Air Slug Test h t Slug out Slug in Transducer and DAQ Regulator Valve
Compressed Air
Valve h t
Slug out
Slug in
Air Slug Test

5. FIELD APPLICATION (SC Botanical Gardens, Clemson Well Field)
Photo Log
WELL-(LAR-4)
FRX. LOCATION

6. FIELD DATA Transmissivity Example at 50.2m Slug Volume 5.5L
T = dwell2/t0.37
Similar to Hvorslev Method
t0.37=~20sec
dwell2=0.023m2
T=0.001m2/s

7. (LP) PACKER RESULTS
0.013
0.0016

8. (HP) STRADDLE PACKER ROCTEST Packers Length-150cm
Inflation Pressure: 800psi
Differential Pressure: 200psi
~$ per packer

9. VERIFICATION

10. CONCLUSIONS
The (HP) straddle packer system costs $ and requires a winch and several personnel to deploy, which can increase operational costs.
The (LP) Straddle packer system costs $ and can be deployed without a winch using one or two personnel
The (LP) packer system gives T results that are similar to the (HP) packer system T results.
The effectiveness of the (LP) packer seal can be improved by stacking additional packers.

11. ACKNOWLEGEMENTS Murdoch, Larry (Advisor) Schweisinger, Todd (Student)
Elmore, Ryan (student)
Hall, Richard (Student)
Thanks To: National Science Foundation (NSF EAR )