Optical Televiewer

The Optical Televiewer provides continuous logs of oriented, high resolution unwrapped video images of borehole walls. Further processing allows for the computation and display of standard information on fractures and other geological features.

Unlike the Acoustic Televiewer, the Optical Televiewer can be run in both air filled and (clear) water filled holes.

Logging Sondes

Geovista reserve the right to change the products’ list and specifica�ons without prior no�ce

U N I T 1 0 , C A E FFW T B US I N E S S P A RK , G L A N CO NW Y, LL 28 5 S P , U K W E B S I T E : ht tp : / /www.geovis ta .co.uk

P H O N E : +44 (0)1492 57 33 99 F A X : +44 (0)1492 58 11 77 E - M A I L : geovis ta@geovis ta .co.uk

Specifications: Dimensions & Weight: Length: 1.63 m : Diameter: 52 mm max.; Weight: 5 kg

Optical Subsystem:

• Image resolution : 360 to 1440 pixels / circumference ( user definable)

• Data rate : 1500 Kbps

• Colour resolution: 24 bit RGB

• Sensor: 1280x1024 CMOS image sensor

• Structural log and Image data format: : Bitmap files

• Structural and orientation data format..: ASCII files

Log Parameters:

• 360° oriented optical Image

• Borehole azimuth and dip

Operating Conditions : Fluid (clear) and air filled boreholes; Max. Pressure 100 bar; ext. to 150 bar Max. Temp.: 50ºC

Borehole Diameter Range: 57 to 300 mm , depending on conditions

Typical Logging speed: 2.5m/min with 720 pixels horizontal and 1 mm vertical resolution.

The sonde can be supplied with a standard Geovista logger or with only a data modem and acquisition software if no other Geovista sondes are required at the time. The Imaging Modem is a communication interface for the acoustic and the optical imaging tools. It comes fitted with a USB interface and image data acquisition software. The high speed version allows for higher communication speed, of up to 312 Kbits/sec for wirelines up to 1500 meter and 208 Kbits/sec for wirelines up to 2000 meter.

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The Acoustic Borehole Televiewer provides continuous logs of oriented, unwrapped images of borehole walls. Further processing allows for the computation and display of standard information on fractures and other geological features. Unlike the Optical Televiewer, the Acoustic Televiewer can be run in both clear and opaque mud.

Specifications: Dimensions & Weight: Length: 2.10 m ; Diameter: 42 mm; Weight: 10 kg

Acoustical Subsystem: • Frequency: 1.5 MHz

• Beam angle: 3º conical

• Rotation speed: up to 20 rev/sec

• Sampling density : 90, 120, 180 or 360 per revolution

• Acquisition sampling rate: 100 nS

• Gain: 0 to 60 dB in 1 dB steps or Automatic Gain Control (AGC)

• Acquisition resolution: 8 bits

Deviation Subsystem: • 3-axis magnetometer - Azimuth accuracy: ±2.5º

• 3-axis accelerometer - Inclination accuracy: ±0.4º Log Parameters:

• 360° oriented Travel Time Image ( 12-bit resolution / 100 ns per bit )

• 360° oriented Amplitude Image

• Borehole azimuth and dip

Operating Conditions : Fluid filled boreholes; Max. Pressure 200 bar; Max. Temperature: 70ºC

Borehole Diameter Range: 50 to over 400 mm , depending on borehole fluid conditions

Acoustic Borehole Televiewer

Logging Sondes

Geovista reserve the right to change the products’ list and specifica�ons without prior no�ce

U N I T 1 0 , C A E FFW T B US I N E S S P A RK , G L A N CO NW Y, LL 28 5 S P , U K W E B S I T E : ht tp : / /www.geovis ta .co.uk

P H O N E : +44 (0)1492 57 33 99 F A X : +44 (0)1492 58 11 77 E - M A I L : geovis ta@geovis ta .co.uk

The sonde can be supplied with a standard Geovista logger or with only a data modem and acquisition software if no other Geovista sondes are required at the time. The Imaging Modem is a communication interface for the acoustic and the optical imaging tools. It comes fitted with a USB interface and image data acquisition software. The high speed version allows for higher communication speed, of up to 312 Kbits/sec for wirelines up to 1500 m and 208 Kbits/sec for wirelines up to 2000 m.

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Geovista supply a range of colour borehole inspection cameras featuring high

resolution and high sensitivity CCD sensors.

All cameras operate on co-axial logging cables and on short lengths of

standard mono-conductor cables. As a result, the cameras can be run on the

same winch as the logging sondes.

Dual Camera

The Dual Camera sonde offers the convenience of both

downhole and sidewall viewing facility by switching between

two individual cameras, one directed axially and the other

directed radially with 360º infinite rotation.

In addition, this sonde can be fitted with a compass for image

orientation.

The side view objective is fitted with an array of white, high

luminosity LED lights. Downhole lighting is supplied with either a

frontal light head or a ring light for larger diameter boreholes.

Camera Systems

Geovista reserve the right to change the products’ list and specifica�ons without prior no�ce

U N I T 1 0 , C A E FFW T B US I N E S S P A RK , G L A N CO NW Y, LL 28 5 S P , U K W E B S I T E : ht tp : / /www.geovis ta .co.uk

P H O N E : +44 (0)1492 57 33 99 F A X : +44 (0)1492 58 11 77 E - M A I L : geovis ta@geovis ta .co.uk

Specifications

− Image sensor: 1/3” CCD − Resolution: 700 TV lines / 976 (H) x 582 (V) pixels − Min. illumination: 0.01 Lux − Lens size: 6 mm and 2.6 mm (or as required) − Electronic Iris, Remotely controlled focus − White LED integral lighting for side-view objective

− Removable 80W Halogen Ring Light (∅135 mm)

− Removable LED Ring Light (∅80 mm) − (Optional) Detachable LED Frontal light − External Diameter: 72 mm − Length: 125 cm − Weight: 17 kg (with ring light) − Temperature rating: 60ºC − Pressure: 200 bar

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Image Orientation and Borehole Inclination

An option to measure and display image orientation and borehole

inclination on the video monitor is available with the Dual Camera .

− Image sensor: 1/3”CCD − Resolution: 550 TV lines / 795 (H) x 596 (V) pixels − Min. illumination: 0.01 Lux − Lens size: 2.6 mm (or as required) − Automatic Iris / Fixed focus − White LEDs integrated ring light − Max.External Diameter: 42mm − Length: 66 cm − Temperature rating: 60ºC

Axial Viewing Cameras

The Axial Viewing Camera sonde offers the convenience of a smaller diameter , a low-

er price, and a wide angle lens to maximise the frontal field of vision.

With a 0.01 lux sensitivity sensor and frontal light head, this camera is suitable for inspec-

tions in small diameter wells or in wells with small diameter access ports.

Specifications

Camera Control Unit

Camera Systems

Geovista reserve the right to change the products’ list and specifica�ons without prior no�ce

U N I T 1 0 , C A E FFW T B US I N E S S P A RK , G L A N CO NW Y, LL 28 5 S P , U K W E B S I T E : ht tp : / /www.geovis ta .co.uk

P H O N E : +44 (0)1492 57 33 99 F A X : +44 (0)1492 58 11 77 E - M A I L : geovis ta@geovis ta .co.uk

The camera control panel comes in a transit case,

and includes a monitor and a video keyboard.

Video recording can be done either on a separate

DVD recorder or on a suitable laptop PC .

For vehicle mounted systems, the control panel comes in a

compact enclosure with a separate monitor and optional

DVD recorder.

HiTemp Camera

The HiTemp Camera sonde can be run in wells with temperatures of up to

100°C. This is an axial viewing sonde with a single wide- angle objective.

The HiTemp camera is available in colour for up to 1500m of cable, and

in Black & White for up to 2000m of cable.

Specifications

− Image sensor: 1/3” CCD − Resolution: 700 TV lines / 976 (H) x 582 (V) pixels − Frame rate: 30 frames /second − Min. illumination: 0.01 Lux − Lens size: 2.6 mm − Automatic Iris / fixed focus − Max External Diameter: 60 mm − Temperature rating: 100ºC / Pressure: 200 bar

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