iQ™ Magnetic Properties Tool
Measures the casing in 90° sections
Applications
- Casing inspection
- Casing thickness
- Scale determination
- Casing ID
Features and Benefits
- Compact and robust tool design provides the azimuthal casing thickness (map) without delicate arms, pads, or bow springs
- Unique measurement algorithm and new digital electronics generate:
- Quantitative EM casing ID and properties through multi-frequency measurements and inversion
- Quantitative quadrant casing thickness corrected by measured casing properties
- Simple and reliable calibration procedures
- Provides an electromagnetic ID
- Compatible and works with the HD platform
Tool Description
The Weatherford 4-segment receiver of the iQ magnetic properties tool measures the casing in 90° sections (quadrants).
The tool produces a magnetic field that opposes the primary field casing attenuation and phase shift. The magnitude of the measured phase shift is a function of the electrical conductivity, magnetic permeability, and metal thickness of the field being measured.
Multiple coil spacing and frequencies control the depth of investigation and measure the electromagnetic properties of the casing, yielding a quantitative casing thickness and internal diameter measurements.
Specifications—Standard, PTX, HD
Ratings and Dimensions
| 2-3/4 in. | 3-1/2 in. |
Maximum temperature | 350°F (177°C) | |
Maximum pressure | 20,000 psi (138 MPa) | |
Outside diameter | 2.75 in. (69.85 mm) | |
Length | 75 ft (22.8 m) | 68.4 ft (20.8 m) |
Weight | 70 lb (31.75 kg) | 130 lb (177 kg) |
Casing/tubing OD | Min: 3.5 in. (89 mm) | Min: 4.5 in. (114.3 mm) |
Tensile strength | Tension: 15,000 lb (6,803 kg) | |
Measure points | Casing Thickness: 24.5 in. (639 mm) | Thickness: 32.66 in. (829.6 mm) |
*HD only
Borehole Conditions
| 2-3/4 and 3-1/2 in. |
Tool positioning | Centralized |
Logging speed* | Recommended: 30 ft (9.1 m)/min |
*Standard and PTX only
Hardware Characteristics
| 2-3/4 and 3-1/2 in. |
Source type | Single and multi-frequency AC coils |
Sensor type | Azimuthal thickness gauge with quadrant sensitivity multi-frequency caliper and casing properties |
Connections | E-Line ‘GO’ Type |
Combinability | GR, CCL, MAC, Radii Bond Tool |
Acquisition mode* | SRO with TCU |
*HD only
Electrical
| 2-3/4 and 3-1/2 in. |
Current | + 45 mA at 130 V |
Calibration
| 2-3/4 and 3-1/2 in. |
Primary and wellsite | Sections of API casing in different weights |
Measurements
| 2-3/4 and 3-1/2 in. | |
| Casing Thickness | Casing Caliper |
Principle | Remote-field EC | Near-field EC |
Range | 0 to 1.50 in. (0 to 38.1 mm) | 3.50 to 7.00 in. (88.9 to 177.8 mm) |
Azimuthal resolution | 4 sectors | NA |
Vertical resolution | 1.56 in. (39.6 mm) | 1.00 in. (25.4 mm) |
Sensitivity | 1% (2-in. through-hole) | 1% |
Accuracy | ±1% | |
Primary curves | Casing and differential thickness | Casing ID |
Secondary curves | 3-axis accelerometer, internal temperature, casing electrical properties | |
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