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)
15,000 psi (103.42 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)
Max: 7 in. (178 mm)

Min: 4.5 in. (114.3 mm)
Max: 9.625 in. (244.46 mm)

Tensile strength

Tension: 15,000 lb (6,803 kg)
Compression: 15,000 lb (6,803 kg)

Measure points

Casing Thickness:
24.5 in. (639 mm)

Caliper:
25.0 in. (635 mm)

Dift’l Thickness:
32.7 in. (828 mm)

Thickness:
32.66 in. (829.6 mm)

Caliper:
25.62 in. (650.8 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
Max: 60 ft (318.2 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
Mem with MLT

*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

iQ Magnetic Properties Tool

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