Description
The High Speed Radial Cement Bond Logging Tool is a next-generation downhole evaluation instrument designed to deliver high-resolution, full-circumference cement bond assessment with rapid logging performance. Engineered for modern oil and gas well integrity programs, this tool leverages advanced acoustic principles to quantitatively evaluate cement sheath quality between casing and formation - an essential indicator of zonal isolation and long-term well reliability.
What It Is and Why It Matters
Cement bond evaluation is a critical step in well completion and integrity verification. After casing and cementing operations are performed, operators must ensure the cement provides effective sealing between formations, preventing unwanted fluid communication behind casing. Traditional single-axis cement bond logs provide only average bond quality; in contrast, radial cement bond logging captures 360° cement quality distribution for improved channel and micro-annulus detection.
Key Operational Benefits
◆ Rapid, high-resolution recording of cement bond conditions.
◆ Full circumferential coverage mitigates ambiguity inherent in single-axis logs.
◆ Improved risk identification for channeling, voids, and poor bonding.
◆ Actionable data for completion decisions before perforation, stimulation, or production.
Technical Parameters
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General Specs |
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Pressure Rating |
14,500psi (100Mpa) |
14,500psi (100Mpa) |
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Temperature Rating |
350°F (175℃) |
350°F (175℃) |
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Minimum Casing Diameter |
4.5" (114mm) |
4.5" (114mm) |
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Maximum Casing Diameter |
10" (254mm) |
13-3/8" (339.7mm) |
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Diameter |
2-3/4" (70mm) |
3-11/20" (90mm) |
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Length |
2680mm(105.5in) |
2750mm(108.3in) |
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Weight |
44.6kg |
67kg |
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Logging Speed |
32ft/min(10m/min) |
32ft/min(10m/min) |
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Joint Connection |
13-core |
13-core |
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Logging Conditions |
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Well Fluid |
Oil, Fresh Water, Salty Water |
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Position |
Center of Casing |
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Sensors Parameters |
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Transmitter |
1 |
1 |
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Receiver |
2 |
2 |
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AD Resolution Ratio |
12 bit |
12 bit |
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AD Acquisition Ratio |
10Mps |
10Mps |
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Source Distance |
8-sector probe |
12-sector probe |
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CBL Probe |
CBL Probe |
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VDL Probe |
VDL Probe |
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Electrical Characteristics |
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Voltage |
15 to 30 VDC |
15 to 30 VDC |
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Current |
80mA@20VDC |
80mA@20VDC |
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Sampling Period |
320ms |
320ms |
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Transducer Parameters Memory Capacity |
20KHZ 10Gb |
20KHZ 10Gb |
How It Works: Scientific and Technical Principles
The High Speed Radial Cement Bond Logging Tool uses a network of radially distributed acoustic receivers positioned around the tool body. Multiple sensors capture the attenuation of acoustic energy transmitted into the casing, cement, and rock formation. Variations in returned signal amplitude and waveform shape directly correlate with bonding conditions at both the casing–cement interface and the cement–formation interface.
360° Radial Acoustic Mapping
Unlike conventional cement bond log tools that provide a single azimuthal average, radial tools are designed with several sector receivers (often eight or more) to measure acoustic responses at defined angular intervals around the borehole. This multi-sector approach enables:
◆ Detailed identification of cement channels or localized poor bonds.
◆ Accurate differentiation of uniform zones vs. partial bonding regions.
◆ Output of radial cement bond maps that visually convey circumferential quality variations.
This level of resolution provides operators with quantitative insights into cement sheath performance that are essential for robust well integrity evaluation.
Application Scenarios in Modern Well Operations
The High Speed Radial Cement Bond Logging Tool is widely applied in:
◆ Cement Quality Verification
Post-cement logging to confirm cement placement and bonding compliance before production.
◆ Zonal Isolation Assessment
Verification of hydraulic isolation between producing and non-producing zones - crucial for avoiding crossflow and reservoir contamination.
◆ Pre-Perforation Evaluation
Ensuring cement integrity before perforating to avoid communication through poor bonds.
◆ Remedial Planning
Diagnosis of cement channels or poor bonding to guide cement squeeze, casing patching, or other remedial operations.
◆ Complex Geometry Wells
Effective logging in deviated, horizontal, or extended-reach wells where uniform circumferential evaluation is critical.
Why This Tool Builds Operator Confidence?
◆ Industry-Backed Technology
Radial cement bond logging is a recognized enhancement over traditional single-axis tools, offering quantitative circumferential data that reduces interpretation uncertainty.
◆ Data-Driven Insights
By combining high data acquisition rates with sector-based acoustic measurement, this tool delivers objective evidence of cement integrity - a key factor in regulatory compliance and operational planning.
◆ Reduced Operational Risk
High-resolution cement bond assessment minimizes the likelihood of undetected poor bonding conditions, reducing the need for costly re-logging or remedial interventions.
◆ Versatile Well Compatibility
The tool supports a wide range of casing sizes, fluids, and logging environments, making it adaptable to diverse geological and operational settings.
For oilfield operators and service companies focused on robust well integrity programs, the High Speed Radial Cement Bond Logging Tool provides a scientifically grounded, high-performance solution for cement evaluation. With full circumferential coverage and rapid data acquisition, this tool transforms complex bond analysis into clear, actionable insight - supporting safer completions, enhanced reservoir protection, and optimized field performance.
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