Crystal Gauges
GRC QPG
QPG 877 Quartz Gauge
Operating Principle
The sensor (QPG 877 Quartz Gauge) is the result of a concentrated effort to provide the energy industry with the latest technology available for accurate measurement of downhole pressures.
The transducer employs the use of a rugged crystalline quartz sensor that responds to the stress created by pressure. The response is in the form of a change in resonant frequency created by the applied pressure. These frequencies are then converted to real pressure by using the calibration coefficients.
The surface computer does this operation. The pressure dependance of the sensor is slightly non-linear but is easily corrected during calibration using a third-order polynomial function. In addition, crystalline quartz is considered to be perfectly elastic which contributes to the excellent repeatability that is characteristic of this technology.
Two additional quartz sensors are employed, one to measure temperature and the second serves as a stable reference signal. The temperature measurement is used for dynamic temperature compensation of the pressure crystal while the reference signal is used as a stable timing base for frequency counting.
Oscillator circuitry employs surface mount technology, which enhances the small overall size and the ruggedness of the transducer.
The memory storage media is non-volatile which means that the internal memory
does not require a constant voltage supply.
Data can be downloaded to a computer within minutes of gauge retrevial and a
full printout, including linear plot can be produced within 10 minutes.
Gauage data can be viewed within minutes of retreival QPG-877 Quartz Pressure
& Temperature Gauge.
Specifications & Features
| Stability | less than 0.1 psi per day |
| Repeatability | less than 0.1 psi |
| Sensitivity | more than 2Hz/psi |
| Resolution | less than 0.1 psi |
| Pressure Accuracy | less than 0.02% of full scale |
| Temperature Sensor Accuracy | +- 1° F |
| Temperature Sensor Resolution | 0.01° C |
EMR - Flash Electronic Memory Recorder
Specifications & Features
- 2 Megabytes of Flash memory type
- Records 340,000 data sets (press, temp. & time) in memory
- Memory programming mode: 20 selective time interval Mode (each of 1 sec up to 466 Hr)
- Plug in cable attaches memory to computer for programming and test data extraction
- Data transfer time approximately 1 minute to load data to and from the computer
- Easier Sample Rate Selection- New software feature calculates and displays resolution for sample rates selected.
- Faster Sampling Rate New- 0.1-second fastest sampling rate. Reciprocal counting increases resolution at high speed sampling rates. Automatic Time Gate Selection-Ensures maximum resolution for each sample rate selected.
- Power supply is a 9VDC battery packs.
- Enhanced power management facilities including power down circuit when sampling time is grater than 20 sec and battery usage is calculated via the software in battery capacity (Amp/Hr).
- Max. Sample time per data point is 1 Hour.
- Audible confirmation of gauge start
QMS-700F Specifications
- High accuracy, high-resolution system
- Wire line or bundle carrier applications
- Up to 17 days of use with a standard battery pack
- Delta pressure option available
| Diameter | 1.5", 3.81 cm |
| Length | 65.5", 166.4 cm |
| Weight | 17.5LBS., 7.9kg |
| Pressure Range | 16'000psi |
| Max. Op. Temp. | 350°F, 177°C |
Spartek QPG
Spartek Quartz Pressure Gauge
Description:
The SS5030 series of pressure gauges is based on the proven performance of QUARTZDYNE® technology combined with Spartek's industry leading proprietary acquisition electronics. Quartz technology provides superior performance in extreme environmental conditions where data quality is critical.The SS5030 series pressure recorder is available in two different diameter packages. The gauge is ideally suited for recording downhole pressure and temperature data on slickline, drill stem test, or pumps. The gauge is also capable of interfacing to an electric line for surface readout. Ideal pressure recorder for permanent monitoring systems.
Applications
- Well Testing
- Monitoring Well Performance
- Permanent sensors
- Well Stimulations
- Permanent Sensors
- Reservoir Characterization
Operation Specifications:
| Temperature range | 175° C | |
| Pressure Rating | 16,000 psi (max) | |
| Maximum O.D. | 0.75 in | 1.25 in |
| Make-up Length | 26 in | 26 in |
| Housing Types | Stainless 17-4 Inconel 718 (Optional) | |
| Memory Capacity | 520,000 data sets *Expandable |
|
| Power Requirements | 6. volts (Memory Mode) 12-30 volts (SRO Mode) .4 ma (Sleep Mode) 20 ma / sample (3 sec) |
|
Performance Specifications:
| Calibration Range(s) | 0 - 5000 psi 0 - 10000 psi 0 - 16000 psi |
| Pressure Accuracy | .020 % Full Scale |
| Pressure Resolution | .00003% Full Scale |
| Pressure Drift | < 2 psi/year |
| Temperature Accuracy | +/- 1degree F |
| Temperature Resolution | 0.01 degree F |
Spartek Sapphire
SS2700 Sapphire Pressure Gauge
Description: The SS2700 is Spartek's latest generation of pressure gauges utilizing our proprietary sapphire pressure transducer technology. The thin film gauge bridge and temperature compensation resistor are deposited onto the surface of the crystal providing superior temperature compensation, resolution, fast response, and long term stability. Combined with improved low power acquisition electronics, this pressure recorder provides superior performance to all others in its class.
The SS2700 series pressure recorder is available in four different diameter packages. The advances made in miniaturizing has expanded the applicability of this versatile gauge. The gauge is ideally suited for recording downhole pressure and temperature data on slickline, drill stem test, or pumps. The gauge is also capable of interfacing to an electric line for surface readout. Ideal pressure recorder for permanent monitoring systems.
Specifications:
Primary Features
- Superior data quality
- Low power consumption
- Large memory capacity
- Surface readout "ready"
Applications
- Well Testing
- Monitoring Well Performance
- Permanent sensors
- Well Stimulations
- Permanent Sensors
- Reservoir Characterization
Operation Specification:
| Temperature range | 170° C | |
| Pressure Rating | 20,000 psi (max) | |
| Maximum O.D. | 1.00 in | 1.25 in |
| Make-up Length | 24 in | 24 in |
| Housing Types | Stainless 17-4 | |
| Memory Capacity | 520,000 data sets *Expandable |
|
| Power Requirements | 6. volts (Memory Mode) 12-30 volts (SRO Mode) .4 ma (Sleep Mode) 20 ma / sample (3 sec) |
|
Performance Specification:
| Calibration Range(s) | 0 - 750 psi 0 - 1500 psi 0 - 3000 psi 0 - 6000 psi 0 - 10000 psi 0 - 15000 psi 0 - 20000 psi |
| Pressure Accuracy | .022 % Full Scale |
| Pressure Resolution | .00004% Full Scale |
| Pressure Drift | <3 psi/year |
| Temperature Accuracy | +/- 1degree F |
| Temperature Resolution | 0.01 degree F |
Metrolog QPG
Metrologx Quartz Crystal Pressure and Temperature Memory Gauge
- High resolution and high stability even at high temperature
- Used by any technician with no previous knowledge of electronic gauges
- Operated without being open thanks to the HPC connection system
- Powered by Smart batteries which remember their use, can be tested for their remaining life and offer up to 2 years of continuous downhole recording
- Tested, programmed, started & stopped by the GTI+PM
- Operated & read by any IBM compatible PC even portable
- Can be programmed & read by phone
- The gauge main board and battery are integrated in one housing for very long exposure to gas
Specifications:
| Metrologx | |||
| Pressure (Quartz crystal sensor) | |||
| Maximum range | 20000 psi | 1350 bar | |
| Sensor range | 15000 psi | 1000 bar | |
| Accuracy | 0.02% of full scale | ||
| Resolution | 0.01 psi | 0.001 bar | |
| Temperature | |||
| Range | 320°F | 160°C | |
| Accuracy | 0.2°F | 0.1°C | |
| Memory Capacity | |||
| 350000 points (non volatile) | |||
| Programming Modes | |||
| Conventional | yes | ||
| Advanced | yes, up to 16 intervals | ||
| Parameters | |||
| Scanning Rate | any, from 1 s to 10 hrs | ||
| Time Delay | any, from 0 s to 41 days | ||
| Pressure Start | yes, threshold and trigger | ||
| Smart Battery Type | |||
| F15E or 2F15E (below 300°F or 150°C) | |||
| F16E (above 300°F or 150°C) | |||
| Mechanics | |||
| Material | stainless steel, for sour service | ||
| O.D. | 1.25 " | 31.75 mm | |
| Length | 40 " | 1.02 m | |
| Weight | 10 lbs | 5 Kg | |
| Thread connection | 15/16'' (pin up * box down) | ||
| Bottom nose connection | 1/4'' NPT (female) | ||
MetroWin Functions
MetroWin is the software used to operate the Metrolog recorders and to produce
various reports from the data acquired. It runs under Windows 95, 98 or Windows
NT 4.0. It allows to:
- test a recorder,
- program it (thus erasing its memory) and start data acquisition,
- read it after the operation is completed,
- produce various reports and plots of the data acquired and
- export the data under various formats for further treatment by other software.
Capacitance Gauges
GRC EPG
EMS 700 ELECTRONIC MEMORY SYSTEM
Consisting of:
- EPG-720 capacitance pressure & temprature sensor
- EMR-710 Electronic memory recorder
- Battery pack
EPG 720 Capacitance Gauge
Operating Principle
The sensor (EPG 720 Capacitance Gauge) has a frequency proportional to pressure. The CPU will arrange for storage of these frequencies W.R. T. time. These frequencies are then converted to real pressure by Bottom hole temperatures are used for the final calculation of pressures. The temperature reading is taken on a ratio basis to pressure readings.
The memory storage media is non-volatile which means that the internal memory does not require a constant voltage supply.
Data can be downloaded to a computer within minutes of gauge retrieval and a full printout, including linear plot can be produced within 10 minutes. Gauge data can be viewed within minutes of retrieval EPG-720 Electronic Pressure & Temperature Gauge.
Specifications & Features
- Stability: less than 0.1 psi per day
- Repeatability: less than 0. 1 psi
- Sensibility: less than 0. 1psi
- Resolution: less than 0. 1 psi
- Accuracy: 0.04% of full scale
- Output Frequency Range 700 KHZ Nominal
- Temperature Sensor Accuracy (+) or (-) 2F to350 F
- EEPROM memory type (non-volatile)
- Records 32,000 data points in memory
- Memory programming: Mode 1-20 selective time interval Mode 2-Delta pressure
- Plug in cable attaches memory to computer for programming and test data extraction
- Access times approximately 1 second to load or unload data to and from the computer
- Power supply is a 9V DC battery packs maximum 18 days operations
- Power consumption - 66 milliwatts typical, 100-mw peak
- Min. sample time per data point is one second
EMS-700 Electronic Memory System
Applications
The EMS-700 Memory gauge is robust, which makes it ideal for both wireline and
DST with TCP applications.
This tool has an excellent sensitivity comparable to Quartz transducer but does
not suffer the same thermal transient problems of Quartz gauges.
Specifications
- High accuracy, high resolution system
- Wireline or bundle carrier applications
- Up to 17 days of use with a standard battery pack.
- Delta pressure option available
- Diameter : 1.5" , 3.81 cm
- Length : 44" , 111.7 cm
- Weight : 12.7 Lbs. , 5.8 kg
- Pressure Range : 10'000 psi , (optional 16'000 psi upon request)
- Max. Op. Temp. :350F , 177C
EMS-2000 Miniature Gauges
To augment our current range of Quartz and Capacitance gauges we introduced a
range of the latest technology 3 Volt miniature piezo-resistive memory gauges.
They have many potential applications where small size and excellent power
management capabilities are the prerequisite.Equipment is supplied in both
single and tandem gauge packages for your transport convenience.
| Specifications for EMS-2000 | |
| Pressure Resolution Pressure Accuracy Pressure Drift |
0.0006% of full scale 0.03% of full scale < 3 PSIi per year |
| Maximum Temperature Maximum Pressure |
177°C / 150°C 15,000 PSI |
| Memory Sample Rate |
500,000 time, pressure, temp. 1 second minimum |
| Battery Life | Varies w/sample rates, temp. |
| Connection to Computer Software |
Standard RS232 Windows |
| Tool Diameter/Tool Length | 1.9cm (0.75 in) / 27.8cm (10.9 in) 3.2cm (1.25 in) / 38.2cm (15.0 in) |
Gauges Accessories
External Carrier
EXTERNAL ELECTRONIC GAUGES CARRIER
Gauges Sensing Point @ 9.58"
Carrier I.D. 2.25"
Threads 3.5 I.F.
Carrier can accommodate 2 or 4 gauges
Internal Carrier
GAUGES BUNDLE CARRIER
The GBC-405 carrier is designed to take advantage of the short (40 inches)
EMS-700, EMS-770 and EMS-725 for use in drillstem tests, tubing conveyed
perforating tests, above and below packer, surge tool testing and similar
tasks. The carrier is fully concentric and will run in 7 inch and larger
casings.
It can also be used with a sub to accommodate all GRC electronic memory gauges,
or to provide enough space for 2 extra battery packs to operate 2 gauges for
longer term testing.
Features
- Shock Protection
- Two in-series shock mountings
- Versatility, the GBC-405 runs up to four EMS-700 or EMS-725 gauges
- Runs above or below packer
- Quick loading/unloading and easy assembly
- Corrosion resistant stainless steel inner housing
Gauges Bundle Carrier Specifications:
| GBC-405 | |
| Weight | 294 lbs. (133.35 kg) |
| Makeup Length | 101" (256.54 cm) |
| Overall Length | 104.8" (266 cm) |
| Gauge Chamber Section | 82.5" (209.55 cm) |
| Maximum O.D. | 5.5" (13.97 cm) |
| Maximum I.D. | 2.16" (5.49 cm) |
| Differential Pressure | 13,000 PSI (89600 KPa) |
| Tensile Strength | 400000 lbs. (181440 kg) |
SRO Panel
GRC SURFACE READ OUT (S.R.O) INTERFACE
Used for surface recording, this is an interface between the gauge and computer which supplies power to the down hole instrument through a single conductor electric line.
It receives the pressure/temperature signals from the gauge, multiplies the signals through a phase-lock loop amplifier and counts the signals before transferring them to a computer for processing.
The GSC-503 is widely used with the EPG-520 & QPG-820 for real-time recording of pressures and temperatures, which can be displayed on the host computer.
The GSC-503 has four recording channels. It can record output from the EPG-520
down well and the WHG-730 at the wellhead. It also records output from an
ETG-514 temperature gauge.
The EPG-720, which is the gauge portion of the EMS-700, can be configured for
electric line output to be recorded by the GSC-503. Similarly, the QPG-877,
which is the gauge portion of the QMS-700F, can be configured (as QPG-820) for
electric line output to be recorded by the GSC-503.