RADii® Cement-Bond Tool - Medium Diameter
Identifies cement channeling and generates traditional cement bond log and variable-density log
Applications
- Cement-bond quality
- Formation isolation
- Cement channeling
Features and Benefits
- Fully Probe® high-speed digital (HD) platform compatible
- Full SRO and memory capability
- Storable master calibration in tool memory for retrieval when no free pipe is encountered in the well
- High-temperature (HT) version for hostile environments
Tool Description
The Weatherford medium diameter RADii segmented cement-bond tool uses a single ceramic transmitter, an eight-segment receiver at 3 ft, and a single receiver at 5-ft spacing. The segmented receiver generates a cement map enabling cement-channeling identification while the single receiver generates the traditional cement-bond log (CBL) and a variable-density log (VDL).
The medium-diameter RADii segmented cement-bond tool comes in three configurations: standard, with temperature sub, and HD.
Specifications
Ratings and Dimensions
| Standard | With Temperature Sub | HD |
Maximum temperature | 350°F (177°C) | ||
Maximum pressure | 20,000 psi (138 MPa) | 15,000 psi (103.4 MPa) | |
Outside diameter | 2.75 in. (69.85 mm) | ||
Length | 8.73 ft (2.66 m) | 9.39 ft (2.86 m) | 8.73 ft (2.66 m) |
Weight | 93 lb (42.18 kg) | ||
Tensile strength | Tension: 50,000 lb | ||
Casing/tubing OD | Min: 4.5 in. (115 mm) | ||
Materials | Alloy steel (stainless also available) | Corrosion resistant materials used throughout | SST |
Measure points | Amplitude, TT: 4.3 ft (1.3 m) | Amplitude, TT: 4.3 ft (1.3 m) | Amplitude, TT: 4.3 ft (1.3 m) |
Borehole Conditions
| PTX | HD/Memory | HD |
Borehole fluids | OBM, WBM | ||
Tool positioning | Centralized with one each centralizer above and below | ||
Logging speed | Recommended: 60 ft/min (18.2 m/min) | ||
Electrical
| Standard | With Temperature Sub | HD |
Current | 45 mA at 130 V | 45 mA at 130 V | 65 mA at 50 V (SRO) |
Calibration
| Standard | With Temperature Sub | HD |
Primary | 5.5 in. (13.97 cm) pressurized calibration tank | ||
Wellsite | Free pipe, stored calibration tank waveforms on demand | ||
Hardware Characteristics
| Standard | With Temperature Sub | HD |
Source type | One piezoelectric crystal fired at 20 kHz, 50 msec intervals | ||
Sensor type | Omni receiver: One 20 kHz piezoelectric | ||
Connections | Top: 1 3/16 in. 12-P GO box | Top: 1 3/16 in. 12-P type-A | Top: GOI box |
Combinability | GR, CCL, ProMac™, iQ™, Temperature | GR, CCL, single- or dual-spaced neutron | GR, CCL, ProMac™, iQ™, Temperature |
Acquisition mode | SRO | SRO | SRO with TCU |
Fire rate | 20/sec | ||
Waveform | Analog: 3 ft (.9 m), 5 ft (1.5 m) | ||
Record time | 1,480 microseconds for each receiver | ||
Measurements (all configuration except where noted)
| E1 Peak Amplitude | Sonic Waveform |
Principle | Sonic wavetrain attenuation | |
Range | 200 to 1,500 us | |
Resolution | 3 ft/0.9 m | 5 ft/1.5 m |
Precision (1 SD) | < 1 mV | N/A |
Primary curves | Amplitude: 3ft (.9 m) | |
Secondary curves | Probe telemetry and Temperature: Head Voltage, Internal Temperature | |
*Temperature sub configuration only
Reach out to optimize reservoir performance
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