MSIL™ Multistring Isolation Logging Tool


Evaluates the isolation behind casing without the need to remove production tubing from the well


Applications

  • Through-tubing cement evaluation
  • Tubing-anomaly identification


Features and Benefits

  • Quantify zonal isolation behind casing without removing the production tubing from the well.
  • Plan plug and abandonment (P&A) operations on a platform before deploying a rig.
  • Eliminate rig standby costs by logging in memory mode on slickline.
  • Identify tubing anomalies through frequency analysis while simultaneously logging casing isolation.


Tool Description

The Weatherford MSIL cased-hole multistring isolation logging tool evaluates the isolation behind casing without removing production tubing from the well.


Specifications

Ratings and Dimensions

Maximum temperature

350°F (177°C)

Maximum pressure

20,000 psi (138 MPa)

Outside diameter

3.5 in. (88.9 mm)

Tubular range

Tubing OD: ≥4.5 in. (114.3 mm)
Casing OD: ≤13.375 in. (339.7 mm)

Length1

8.92 ft (272 cm)

Weight

100 lb (45.5 kg)

Tensile strength2

Joints and compression: 60,000 lb
Torque: 150 ft-lb

Materials

Corrosion-resistant materials throughout

1The length does not include centralizers. A minimum of two in-line centralizers is required when running the MSIL tool. One centralizer is placed at each end. Add approx. 2.2 ft. (67 cm) for each centralizer.
2Strengths apply to new tools at 70°F (21°C) and 0 psi.

 

Borehole Conditions

Borehole fluids

Salt, fresh and oil

Logging speed

Recommended: 20 ft/min (6.1 m/min)
Maximum: 60 ft/min (18.28 m/min)

Tool positioning

Centralized and eccentralized

 

Hardware Characteristics

Source type

Piezoelectric

Sensor type

Omni-directional: Piezoelectric
Radial: Piezoelectric with azimuthal sensitivity

Sensor spacings

Receivers: 5 ft (152.4 cm)
3 ft. (91.44 cm)

Firing rate

300 – 1000 ms variable via down-link

Waveform

3ft (91.44 cm),
5ft (152.4 cm), 4 Sectors

Recording time

1280 µs for each receiver

Connections

Inverted GO (GOI) and 1-3/16-12 UN threads on top and bottom

Acquisition mode

Surface readout or memory

 

Electrical

Voltage

50 V

Wattage

5 W

 

Measurement

Radial resolution

90 (4 sectors)

Output

Primary: MSIL curve and 4 sector MSIL map
Secondary: Head voltage, internal temperature, and relative bearing
(Recommended running in combination with GR/CCL)

MSIL Multistring Isolation Logging Tool

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