Gamma Ray – Casing Collar Locator – Neutron – Inclinometer – Temperature Tool
Provides correlation and formation evaluation information
Applications
- Through casing porosity
- Gas identification
- Wellbore directional survey
Features and Benefits
- Slim profile for maximum wellbore access
- Compact array of sensors for evaluation of wellbore and reservoir uncertainty
Tool Description
The Weatherford gamma ray – casing collar locator (CCL) – neutron – inclinometer – temperature tool is a compact tool for through-casing evaluation of certain reservoir parameters that can be accurately correlated and understood together with the well geometry.
Specifications
Ratings and dimensions
Maximum temperature | 350°F (177°C) for 4 hours |
Maximum pressure | 20,000 psi (138 MPa) |
Outer diameter | 1.69 in. (42.93 mm) |
Length | 96.46 in. (2450.084 mm) | (M/U length 94.67 in. (2404.62 mm) |
Weight | 35.0 lb (15.9 kg) |
Minimum casing/tubing OD | 2.38 in. (60.45 mm) |
Maximum casing/tubing OD | 7.0 in. (178.0 mm) |
Tensile strength* | Tension: 65,000 lb |
Measure points | GR: 84.79 in. (2,153.67 mm) |
*Strengths apply to new tools at 70°F (21°C) and 0 psi.ß
Borehole conditions
Borehole Fluids | Salt, fresh and oil |
Logging Speed | Recommended: 60 ft/min (18.2 m/min) |
Electrical specifications
Operating V / Current | 130V DC at 45 mA |
Hardware characteristics
| Gamma Ray | Casing Collar Locator | Neutron | Inclinometer |
Sensor Type | Thallium activated sodium iodide crystal | Dual magnet, | Helium-3 filled neutron detector | 3-axis accelerometer |
Transmission Type | Digital telemetry | Line wobble | Digital telemetry | Digital telemetry |
Data Rate | 20 frames / sec at 20 kHz | |||
Combinability | RADII and CBT (bottom only) | |||
Connections | GO top, Source sub bottom (no feedthrough) | |||
Temp Specs | Sensor: RTD (1000) | Trans Type: Digital telemetry | Prim Curve: Temp (°F/C) | Calibration: 2pt linear | |||
Measurements
Principle | Natural Gamma Radiation | Magnetic Flux Lines | Thermal Neutron Detector | Gravity Vector |
Range | 0 to 10,000 cps | 2.38 to 7.0 in. | 200 to 2,000 cps | ± 2 g |
Vert resolution | 6.0 in. (152.5 mm) | NA | NA | NA |
Accuracy (1SD) | ± 5% | NA | ± 0.07% | ± 0.5 degrees |
Sensitivity | ~0.998 cps/API unit | NA | 15 cps/nv | 900 lsb/g |
Primary curves | GR (API) | CCL (mV) | NEU (API) | Inclination |
Secondary | Head voltage, Internal temperature (telemetry only) | |||
Temperature measurements
Accuracy (+/-) | 0.898°F (0.5°C) |
Response time | 0.5 seconds |
Resolution | 0.0018°F (0.001°C) |
Reach out to optimize reservoir performance
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