RADii® Cement-Bond Tool – Small-to-Medium Diameter
Identifies cement channeling and generates traditional cement-bond and variable-density logs
Applications
- Cement-bond quality
- Formation isolation
- Cement channeling
Features and Benefits
- Probe® high-speed digital (HD) platform version compatible with fast telemetry
- Full surface read out (SRO) and memory logging capabilities with HD version
- Master calibration stored in tool memory for retrieval when no free pipe is encountered in the well
- High-temperature version for hostile environments
Tool Description
The Weatherford small-to-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 that enables identification of cement channeling while the single receiver generates the traditional cement-bond log (CBL) and a variable-density log (VDL).
The small-to-medium diameter RADii segmented cement bond tool comes in three configurations: Probe telemetry (PTX), HD, andIdentifies cement channeling and generates traditional cement-bond and variable-density logs high temperature.
Specifications
Ratings and Dimensions
| PTX | HD | High Temperature |
Maximum temperature | 350°F (177°C) | 475°F (246°C) | |
Maximum pressure | 20,000 psi (138 MPa) | 15,000 psi (103.4 MPa) | 20,000 psi (138 MPa) |
Outside diameter | 1.69 in. (43 mm) | ||
Length | 8.60 ft (2.62 m) | ||
Weight | 41 lb (18.60 kg) | ||
Tensile strength | Tension and compression: 15,000 lb | ||
Measure points | Amplitude, transit time: 4.3 ft (1.3 m) | ||
Min/max casing/tubing OD | Min: 2.38 in. (60.45 mm) | ||
Borehole Conditions
| PTX | HD | High Temperature |
Borehole fluids | OBM and WBM | ||
Tool positioning | Centralized with one each centralizer above and below | ||
Logging speed | Recommended: 60 ft/min (18.2 m/min) | ||
Electrical
| PTX | HD | High Temperature |
Current | 38 mA at 130 V | 50 mA at 50 V (SRO) | 38 mA at 130 V |
Calibration
| PTX | HD | High Temperature |
Primary | 5.5 in. (13.97 cm) pressurized calibration tank | ||
Wellsite | Free pipe, stored calibration tank waveforms on demand | ||
Hardware Characteristics
| PTX | HD | High Temperature |
Source type: | One piezoelectric crystal fired at 20 kHz, 50 ms intervals | ||
Sensor type | Omni Receiver: One 20-kHz piezoelectric | ||
Fire rate | 20/s | ||
Waveform | Analog: 3 ft (0.9 m), 5 ft (1.5 m) | ||
Record time | 1,300 us for each receiver | ||
Connections | Top: 1 3/16 in. 12P type-A GO box | Top: GOI box | Top: 1 3/16 in. 12P type-A GO box |
Combinability | GR, CCL, ProMac™, iQ™, temperature | GR, CCL, single or dual spaced neutron, temperature | |
Acquisition mode | N/A | SRO with telemetry control unit Memory with MLT | N/A |
Measurements (all configurations 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 | PTX and heavy duty: head voltage, internal temperature, | |
Reach out to optimize reservoir performance
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