Production Logging Tools
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Cable Head
Provides mechanical and electrical connection between wireline (braided line) and toolstring
Intended as a “weak link” if toolstring becomes stuck in a wellbore
Telemetry
Wireline deployed
Real-time data transmission to a surface acquisition system
Memory Adapter Tool (MAT)
Collects digital data from connected downhole tools
Stores data within 64 MB internal memory core
Gamma Ray Detector
Detects naturally occurring and artificially induced gamma ray radiation
Tracer logs can determine fluid movement or direction of fractures
Dual Gamma Ray Detector
Same features and functionality as the gamma ray detector
Two scintillation crystal gamma ray detectors
Gradiomanometer
Derives fluid density in a well
Measurements can be obtained while the tool is continuously moving up or down the well
Dielectric
Measures fluid capacitance
Measurement determines water percentage
Inline Flowmeters
Run at any point in a tool string
Performs in all orientations from vertical to horizontal
3-Sensor Caliper
Measures inside diameter of a wellbore
Tool data indicates presence of restrictions or out-of-round conditions
Tracer Ejector
Maintains constant internal pressure exceeding wellbore pressure
Electrically activated solenoid ejects a finite amount of radioactive fluid
Knuckle Joint
Bottom section of tool pivots
Can be used to de-centralize string
Roller Centralizer
Centers tool string as it moves in and out of well
Carbide rollers eliminate friction and wear
Bowspring Centralizer
Centers tool string as it moves in and out of well
Arms expand and contract to fit casing or tubing
Flowrate Sensor
Collects samples from a connected spinner head
Frequencies are transmitted over individual channels to the telemetry or memory tool
Hi-Res Pressure/Temperature/Flow (PTF) Sensor
Pressure sensor has built-in temperature compensation
Temperature sensor is an RTD resistor housed within a thin inconel probe
Fullbore Spinner Heads
Spinner collapses to run through tubing and expands to larger diameter in casing
Provides large cross-sectional velocity measurements
Continuous Spinner Heads
Impeller is integrated into tool body
Effective in restricted boreholes, tubing, and high flow velocity