Ruggedised Automatic Gauge for Wireline Intervention
The Reservoir Group Sentinel is an extremely rugged downhole pressure and temperature gauge designed to be run as part of any wireline string. A true user friendly ‘Run-it-yourself’ gauge contained in a bespoke spring mounted shock absorbing assembly, the Sentinel is fully automatic and requires no operator input to acquire data.
The Sentinel is supplied in monitor mode, a non-recording mode, where it is checking pressure and temperature readings every two minutes. When a user-programmed temperature or pressure threshold has been exceeded, the Sentinel automatically enters record mode and stores data to memory at a pre-set sample rate. At the end of a survey, the Sentinel stops recording automatically when pressure and temperature readings fall below the user-programmed threshold values. The Sentinel then reverts to monitor mode ready for the next survey.
A large 1,000,000 data set memory and a built in real-time-clock allows real-time storage of data, in individual survey data files, so that every survey is easy to identify. Multiple wireline surveys/drift runs are possible on a single long life AA size battery. A gradient/BHP survey can be performed during any drift run with no additional rig time or wireline operations.
Features
Completely automatic, no operator input required to record data
All data is stored with real time values for easy analysis
1,000,000 data set memory, where 1 second recording rate provides 11.5 days of data
Innovative electronics dramatically reduces power consumption
Long life ‘AA’ size battery is easier to ship since it is not classed as dangerous goods
Overall length of 19” and 1-1/16” SR thread connections makes Wireline rig- up easier
Spring mounted gauge, can be run with perforating guns
Applications
Gradient surveys
Perforation monitoring
Pressure build-up or draw-down tests
Production surveys
Reservoir evaluation, well testing & DST
Static, flowing and build-up surveys
Stimulation monitoring
Specifications
Pressure
Maximum external pressure Must not exceed sensor range or 15 ksi Max
Sensor range 2 options, 8.6 ksi and 15 ksi
Sensor type Piezo-resistive
Accuracy ± 0.06% FSO
Accuracy typical
± 0.04% FSO
Resolution
0.2 psi
Temperature
Maximum temperature
Must not exceed 150°C
Operating range
0 to 150°C
Accuracy
± 1.0°C
Accuracy typical
± 0.5°C
Resolution
0.05°C
Power
Battery type
AA type lithium, hardwired
Operating voltage
3.6 to 3.9 V
Battery life*
Up to 1 Year
Memory
Sampling interval 1 to 600 seconds
Memory type Non-volitile
Capacity 1,000,000 data sets
Record contents
Real time, pressure, temperature
Other
Diameter options 1 1/16" sucker rod
Materials SS 17-4 PH, Sub K500 Monel
Service
Standard or H2S
The Reservoir Group Sentinel is an extremely rugged downhole pressure and temperature gauge designed to be run as part of any wireline string. A true user friendly ‘Run-it-yourself’ gauge contained in a bespoke spring mounted shock absorbing assembly, the Sentinel is fully automatic and requires no operator input to acquire data.
The Sentinel is supplied in monitor mode, a non-recording mode, where it is checking pressure and temperature readings every two minutes. When a user-programmed temperature or pressure threshold has been exceeded, the Sentinel automatically enters record mode and stores data to memory at a pre-set sample rate. At the end of a survey, the Sentinel stops recording automatically when pressure and temperature readings fall below the user-programmed threshold values. The Sentinel then reverts to monitor mode ready for the next survey.
A large 1,000,000 data set memory and a built in real-time-clock allows real-time storage of data, in individual survey data files, so that every survey is easy to identify. Multiple wireline surveys/drift runs are possible on a single long life AA size battery. A gradient/BHP survey can be performed during any drift run with no additional rig time or wireline operations.
Features
Completely automatic, no operator input required to record data
All data is stored with real time values for easy analysis
1,000,000 data set memory, where 1 second recording rate provides 11.5 days of data
Innovative electronics dramatically reduces power consumption
Long life ‘AA’ size battery is easier to ship since it is not classed as dangerous goods
Overall length of 19” and 1-1/16” SR thread connections makes Wireline rig- up easier
Spring mounted gauge, can be run with perforating guns
Applications
Gradient surveys
Perforation monitoring
Pressure build-up or draw-down tests
Production surveys
Reservoir evaluation, well testing & DST
Static, flowing and build-up surveys
Stimulation monitoring
Specifications
Pressure
Maximum external pressure Must not exceed sensor range or 15 ksi Max
Sensor range 2 options, 8.6 ksi and 15 ksi
Sensor type Piezo-resistive
Accuracy ± 0.06% FSO
Accuracy typical
± 0.04% FSO
Resolution
0.2 psi
Temperature
Maximum temperature
Must not exceed 150°C
Operating range
0 to 150°C
Accuracy
± 1.0°C
Accuracy typical
± 0.5°C
Resolution
0.05°C
Power
Battery type
AA type lithium, hardwired
Operating voltage
3.6 to 3.9 V
Battery life*
Up to 1 Year
Memory
Sampling interval 1 to 600 seconds
Memory type Non-volitile
Capacity 1,000,000 data sets
Record contents
Real time, pressure, temperature
Other
Diameter options 1 1/16" sucker rod
Materials SS 17-4 PH, Sub K500 Monel
Service
Standard or H2S
