Mechanical Integrity Services
INTERFACING & TOOL COMBINATIONS
- Simultaneous Operation with other Specialty Cased Hole Logging Tools
Casing Inspection (Casing Calipers) (MIT 24 Finger)
Radial Bond Logs (RBT)
Temperature Surveys
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Casing Inspection (Casing Calipers) / Multi Finger Imaging Tool (MIT 24 Finger)
The 24 finger Multi Finger Imaging Toll (MIT) is used to detect very small changes to the internal surface condition of tubing or casing with a high degree of accuracy. The MIT can be run through tubing to log casing deeper within a well.
APPLICATIONS
- Casing inspection
- Quantification of scale build-up and corrosion
- Accurate location of anomalies
- Identification of items within tubing, buckling and damage
- Suitable for all well deviations including horizontal
- 3D visualization capabilities
SPECIFICATIONS
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Diameter
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1 11/16” (43 mm)
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Length
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64.6” (1,640 mm)
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Weight
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20.7 lbs (9.38 kg)
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Max. Temperature
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350°F (177°C)
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Max. Pressure
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15,000psi (103MPa)
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STANDARD
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EXTENDED
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Measurement Range
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1.75” – 4.5” (45 – 114 mm)
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1.75” – 7” (45 – 178 mm)
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Radial Resolution
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0.002” (0.051 mm)
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0.003” (0.076 mm)
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Radial Accuracy
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± 0.02” (0.508 mm)
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± 0.02” (0.508 mm)
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Finger Tip Width
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0.063” (1.60 mm)
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0.063” (1.60 mm)
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Finger Contact Force
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0.75 – 1.25 lbf (3.4 – 2.7 N)
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0.75 – 1.25 lbf (3.4 – 2.7 N)
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Vertical Resolution
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0.083” (1.27 mm) @ ~ 30 f/min (10 m/min)
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Materials
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Corrosion Resistant Throughout
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Radial Bond Logs/Tool (RBT)
The RBT measurment is based upon the prinicples of Sonic Attenuation. A traditional Cement Bond Log (CBL) measures the amplitude of a sonic signal passing along the casing; the signal is reduced where the casing is bonded to the cement. While cement bonds that are either complete, or totally absent, can be clearly identified, signals showing partial bonds provide insufficent data to determine hydraulic isolation. The RBT overcomes this problem by using six (6) receivers positioned circumferentially around the tool. Each receiver provides bond data covering a 1/6th sector of the casing, generating a six segmented “map” of the cement in additon to the conventional CBL and VDL (Variable Density Log).
APPLICATIONS
- Cement bond evaluation
- Cement channel identification
- Bond index calculation (hydraulic isolation effectiveness)
- Bond attenuation measurement
- Cement compressive strength
- Simultaneous cement bond and casing inspection
- Compressional delta T (computed product), DT
SPECIFICATIONS
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Diameter
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1 11/16” (43 mm)
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Length
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130.7” (3,320 mm)
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Weight
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40 lbs (18.1 kg)
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Max. Temperature
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350 °F (177 °C)
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Max. Pressure
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20,000 psi (138 MPa)
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Receivers
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Piezoelectric Crystal (2 ft spacing)
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Measurement
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6-Channel Radial, 3’ and 5’ Acoustic
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Borehole Fluids
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Oil, Fresh Water, Brine
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Materials
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Corrosion Resistant Throughout
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Temperature Surveys (Capacitance / Temperature / Flowmeter (CTF))
Capacitance Water Hold-Up (CWH): Hydrocarbons and water have different dielectric constants. The output frequency of the probe is in response to the average dielectric constant of the fluids between the cage of the tool and the inner probe. From this the down hole water to hydrocarbon ratio can be derived.
Temperature: The sensor uses a platinum resistance probe, which changes resistance with temperature. The output signal is multiplied within the electronics to convert to extremely high resolution. The probe tip is very small resulting in a very rapid (0.5 sec) response time.
Flowmeter Electronics: Dual magnets are fitted to the flowmeter main shaft which close Hall effect sensors/switches as the shaft rotates. 5 pickups give a directional output of 10 pulses per revolution.
APPLICATIONS
- Fluid compositon from average dielectric constant
- Fluid ID from temperature response
- Location of leaks and crossflow by temperature response
- Quantitative measurement of flowrate in casing and tubing
CAPACITANCE WATER HOLD-UP / TEMPERATURE SPECIFICATIONS
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Diameter
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1 3/8” (35 mm)
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Length
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18.78” (0.47 m)
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Weight
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4.0 lbs (1.81 kg)
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Max. Temperature
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350°F (177°C)
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Max. Pressure
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15,000 psi (103 MPa)
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Temp Measure point
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8.72” (0.22 m)
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CWH Measure point
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5.34” (0.13 m)
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Power Supply
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+12 V @ 25 mA
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CWH Resolution
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1%
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CWH Range
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0-45% Water Hold-up
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Temp. Resolution
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0.0055°F
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Temp. Accuracy
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+/- 1°F
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Temp. Response
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<0.5 seconds
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Flowmeter Output
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10 pulses/Revolution
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Material
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Corrosion Resistant Throughout
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FLOWMETER SPECIFICATIONS
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Diameter
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1 3/8” (35 mm) and 1 11/16” (43 mm)
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Length
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2.91 ft (890 mm)
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Weight *
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10 lbs (4.5 kg)*
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Max. Temperature
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350° F (177° C)
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Max. Pressure
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15,000 psi (103.4 MPa)
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Sensor Measure Point
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13.5” (349 mm)
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Output
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10 pulses/rev (directional)
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Sensor Threshold *
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~ 1.7 ft/min (0.01 m/s), 100 bpd in 7” CSG
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Max Fluid Velocity
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500 ft/min (2.54 m/s), 2,850 bpd in 7” CSG
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Casing Range
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2 3/8” to 9 5/8”
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Materials
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Corrosion Resistant Throughout
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* Dependant on spinner & cage sizes
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