TELEVIEWER OPTIONS
Downhole televiewer tools provide continuous orientated images of the drill hole surface. Two complementary technologies are available: Optical televiewer (OTV) deliver high resolution true color images as an unwrapped orientated image of the borehole wall. Acoustic televiewer (ATV) use a focused ultrasonic beam to scan the drill hole surface providing borehole shape and the strength of the reflected sonic signal.
Note: Acoustic and Optical televiewers are available. The acoustic tools require a water filled hole to operate. Optical tools work in both water filled and dry holes however, the water conditions need to be clear for clarity of image.
QL 40 ACOUSTIC BOREHOLE TOOLS
The QL40ABI and ABI40-GR are the latest generation of acoustic televiewers based on over 20 years of experience and market leadership. The tool benefits from new 2G telemetry protocol optimizing logging speed on long single or multi-conductor wirelines.
The acoustic borehole imager records a 360° image unwrapped of the borehole wall. The tool emits an ultrasonic beam towards the formation and records amplitude and travel time of the reflected signal. Amplitude records are representative of the impedance contrast between rock and fluid. Travel time is used to determine accurate borehole diameter data, which makes the tool ideal for borehole deformation description - stress field analysis and casing inspection.
A built in high precision orientation package incorporating a 3 axis fluxgate magnetometer and 3 accelerometers allows orientation of images to a global reference and determination of borehole azimuth and inclination.
Sophisticated algorithms and real time processes are also implemented to extend tool applications for casing thickness measurement, corrosion evaluation and measurement behind a PVC casing.
The QL40ABI tool is a bottom sub in the Quick Link (QL) product line and can be combined with other QL40 tools to form a tool string or it can be run as a standalone tool.
The ABI40-GR is a standalone tool integrating a built in natural gamma sensor.
QL 40 ACOUSTIC SPECIFICATIONS
TOOL
- Diameter: 40mm (1.6”)
- Length (min/max): 1.62m (63”) / 1.84m (72.4”)
- Weight (min/max): 6.7kg (14.7 lbs) / 7.4kg (16.3 lbs)
- Temp: 0 - 70°C (32 - 158°F)
- Max. Pressure: 200bar (2900psi)
ACOUSTIC SENSOR
- Acoustic Sensor: Fixed transducer and rotating focusing mirror
- Focusing: Collimated acoustic beam
- Frequency: 1.2 MHz
- Rotation speed: Up to 35 revolutions per second - automatic
- Caliper resolution: 0.08mm (0.003")
- Samples per revolution: 72, 144, 216, 288 and 360
NATURAL GAMMA SENSOR
- 0.875” (22.2mm) x 3” (75.6mm) NaI (Ti) scintillation crystal
- Integrated (ABI40 GR) or in line sub (QL40 GR)
ORIENTATION SENSOR
- APS 544 - 3-axis fluxgate magnetometer
- 3 accelerometers
- Inclination accuracy: +/- 0.5 degree
- Azimuth accuracy: +/- 1.2 degree
OPERATING CONDITIONS
- Cable type: Mono, multi-conductor, coax
- Compatibility: Scout / Opal (ALTIogger / Bbox / Matrix)
- Digital data transmission Telemetry: Variable baudrate telemetry according to cable length/type & surface system
- Logging speed: Variable - function of image resolution, borehole diameter, wireline and surface system model
- Centralisation: Required
- Borehole fluid: Water, water based mud, brine, oil (oil based mud not applicable)
- Measurement range: Open hole : 2.5" to 20" depending on mud conditions, Cased hole: 5" to 20" minimum thickness 5mm (scrape casing before operation)
QL 40 ACOUSTIC BOREHOLE TOOLS
APPLICATION
OPEN HOLE
- Detailed and oriented caliper and structural information
- Borehole deformation (stress field analysis)
- Fracture detection and characterization
- Breakout analysis
- Lithology characterizations (Detection of thin beds, determination of bedding dip)
- Rock strength and fabric
CASED HOLE
- Casing inspection and corrosion evaluation
- Steel casing thickness
PRINCIPLE OF MEASUREMENT
The ABI produces images of the borehole wall which are based on the amplitude and travel time of an ultrasonic beam reflected from the formation wall. The ultrasonic energy wave is generated by a specially designed piezoelectric ceramic crystal and has a frequency of around 1.2MHz. On triggering, an acoustic energy wave is emitted by the transducer and travels through the acoustic head and borehole fluid until it reaches the interface between the borehole fluid and the borehole wall.
By careful time sequencing the piezoelectric transducer acts as both transmitter of the ultrasonic pulse and receiver of the reflected wave. Travel time for the energy wave is the period between transmission of the source energy pulse and the return of the reflected wave measured at the point of maximum wave amplitude. Magnitude of the wave energy is measured in dB, a unitless ratio of the detected echo wave amplitude divided by the amplitude of the transmitted wave.
MEASUREMENT FEATURES
OPEN HOLE MODE
- 360° unwrapped and oriented image of the borehole wall based on travel time and amplitude records: caliper and amplitude image logs
- Deviation parameters: azimuth, tilt, tool relative bearing, magnetic field, gravity
- 3 accelerometer calibrated components, 3 magnetometer calibrated components
- Natural gamma in cps or API units (optional ABI40GR-2G)
BEHIND PVC MODE*
- 360° unwrapped and oriented image of the PVC casing and borehole wall based on travel time and amplitude records: caliper and amplitude image logs
- Deviation parameters: azimuth, tilt, tool relative bearing, magnetic field, gravity
- 3 accelerometer calibrated components, 3 magnetometer calibrated components *PVC must be centered in borehole
CASED HOLE MODE
- 360° unwrapped image of the steel casing based on travel time and amplitude records : caliper, amplitude, thickness and score image logs
- Deviation parameters: tilt, tool relative bearing, gravity
"Advance Logic Technology is a world leading developer of slim line acoustic and optical televiewers used globally"
QL 40 OPTICAL BOREHOLE TOOLS
The QL40OBI and the OBI40GR are the new generation of slim hole Optical Borehole Imagers. The new system comprises a completely redesigned optical assembly with new electronics. It implements a high resolution CMOS digital image sensor combined with a fisheye lens. The tool produces an extraordinarily clear, sharp, 360° continuous - unwrapped digital picture of the borehole wall, either in air or clear water. Resolutions up to 1800 pixels over the borehole circumference can be achieved which makes it ideal for lithological, mineralogical and structural analyses.
A built in high precision orientation package incorporating a 3 axis fluxgate magnetometer and 3 accelerometers allows orientation of the images to a global reference and determination of the borehole’s azimuth1 and inclination.
The new QL40OBI is fully digital and can operate on standard wirelines. It is a bottom sub and can be either combined with other logging tools of the QL (Quick Link) product line to build tool strings or operated as a standalone tool.
The OBI40GR is a standalone tool version integrating a natural gamma sensor thereby enabling the measurement of gamma radiation emitted naturally from within the formations crossed by a borehole.
QL 40 OPTICAL SPECIFICATIONS
TOOL
- Diameter: 40mm (1.6”)
- Length (min/max): 1.49m (58.7”) / 1.93m (75.98”)
- Weight (min/max): 5.3kg (11.7 lbs) / 6.5kg (14.3 lbs)
- Temp: 0 - 70°C (32 - 158°F)
- Max. Pressure: 200bar (2900psi)
OPTICAL SYSTEM
- Sensor: 1/3” high sensitivity CMOS digital image sensor
- Color resolution: 24 bits RGB true colors
- Azimuthal resolutions: 120, 180, 360, 600, 900, 1800 points
- Vertical resolution: User defined. Function of depth encoder vertical resolution
- Light source: High efficiency white LEDs
ORIENTATION SENSOR
- APS 544 - 3-axis fluxgate magnetometer 3 accelerometers
- Inclination accuracy: +/- 0.5 degree
- Azimuth accuracy: +/- 1.2 degree
OPERATING CONDITIONS
- Cable type: Mono, multi-conductor, coax
- Compatibility: Scout / Opal (ALTIogger / Bbox / Matrix)
- Digital data transmission Telemetry: Variable baudrate telemetry according to cable length/type & surface system
- Logging speed: Variable - function of image resolution, borehole diameter, wireline and surface system model
- Centralisation: Required
- Borehole fluid: Dry or clear water
- Measurement range: In air and in water : 2.3” to 21” (58 to 530mm)
QL 40 OPTICAL BOREHOLE TOOLS
APPLICATION
OPEN HOLE
- Detailed and oriented structural information
- Reference for core orientation
- Fracture detection and evaluation
- Breakout analysis
- Lithology characterizations (Detection of thin beds, foliation, grain size, mineralogy, luminance), determination of bedding dip
CASED HOLE
- Casing inspection
PRINCIPLE OF MEASUREMENT
The tool incorporates a 1/3-inch CMOS digital image sensor and matching fisheye optics. The digital image sensor captures the reflection of the borehole wall through the fisheye lens. The light source is provided by 10 high efficiency LEDs.
The displayed log image is derived from a single annulus extracted from the active pixel array. Azimuthal resolutions available are 120, 180, 360, 600, 900 and 1800 points per recorded circle. By using processed digital images in combination with deviation sensor data, the tool can generate an unwrapped 360° oriented image.
MEASUREMENT FEATURES
- 360° RGB true color oriented image
- 360° real time image filtering to enhance image contrast in dark environement
- Deviation parameters: azimuth, tilt, tool relative bearing, magnetic field, gravity
- 3 accelerometer calibrated components, 3 magnetometer calibrated components
- Temperature of CMOS image sensor
- Natural gamma in cps or API units (optional – OBI40GR-2G)
QL40 OPTICAL BOREHOLE TOOLS WITH UV
The QL40OBI-UV is a derived product from the ALT slimhole Optical Borehole Imager. The new system shares the same technology as the standard QL40OBI. It implements a high resolution CMOS digital image sensor combined with a fisheye lens.
This new optical televiewer combines white light as well as ultraviolet (UV) light source in the same logging tool. Please contact Geosensor Wireline for further information.
WINCH OPTIONS
GEOSENSOR WIRELINE HAS A VARIETY OF WINCH SYSTEMS TO OFFER WITH TELEVIEWER LOGGING SYSTEM PACKAGES
- Small and portable, lightweight, shallow geotech winches 0-200m
- Portable compact winches to 500m
- Truck mounted deep winches to 2000m
All tools and winches are shipped in heavy duty, enclosed cases. This ensures equipment is secure during transit.
"Mount Sopris is well-known for its rugged logging winches, featuring proven designs and heavy duty components to ensure reliable performance in the most demanding environments. Winch failures can be very costly in terms of time, money and safety – don’t settle for anything less than a Mount Sopris winch!"
SCOUT PRO LOGGING AQUISITION SYSTEM
The SCOUT PRO is appreciated by logging operators worldwide for its unique combination of high performance, ruggedness and ease of use. In addition to supporting all tools implementing ALT protocol including MSI/ALT tools with QL Telemetry, the new system also offers compatibility with Geovista and Kuster probe lines. The hardware incorporates the latest electronic components with embedded systems controlled via the specially developed LOGGERSUITE Windows interface program.
KEY BENEFITS
- USB interface, runs on any PC compatible notebook
- Windows operating system platform
- Programmable power supply
- Compatibility with Geovista and Kuster probe lines
- Wireline and winch flexibility-runs on coax, mono-or multi-conductor wireline
- High speed up hole telemetry system and automatic telemetry tuning
- High telemetry performance on long single and multiconductor wirelines when used in conjunction with the latest generation of ALT/MSI tools. New Equalizer and Train processes
- Totally software controlled using Logger Suite software
- Real Time Data display and printing
- Very easy to use, with graphical user interface, self diagnostic features, configurable through files, minimal user input required
- Shaft encoder flexibility - compatible with any 12V or 5V shaft encoder
- Wireline tension monitoring. Tension adapter compatible with any tension sensors-gauges
- Robust heavy duty system, fault tolerant
- Preferred solution for customer looking for light weight, high performance equipment
Speak to Geosensor Wireline about your televiewer data interpretation requirements
WELLCAD SOFTWARE SALES AND RENTALS ARE AVAILABLE FOR SELF-INTERPRETATION REQUIREMENTS
Processing services of Optical, Acoustic televiewer and all other borehole data. Televiewer Structure interpretation, breakout analysis, core photo imports, and much more