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DSNTDSNT--II

Dual Spaced Neutron Tool

Insite

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DSNTDSNT--II

INC board Insite Numar Controller

Controls all functionality of the SDLT-I

and DSNT-IMAU board

Media Access Unit

Controls communication between theINC board and GTET

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DSNTDSNT--II

Motor Control board Controls three phase dc power for

caliper motor

Determines end-of-travel Controls caliper motor movement

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DSNTDSNT--II

DC Power Supplies 3.3 volts

Digital 5 volts

Analog +/- 5 volts +/- 15 volts

- 9 volts

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DSNTDSNT--II

Neutron Detection Two He3 Detectors

1 x 4 Short Spaced

2.5 x 12 Long Spaced

Pre-Amplifiers

Amplifier/Discriminator

INC Board (count discriminated pulses)

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DSNTDSNT--II

INSITE 12 +1 Lower Connector Pins 7 and 8 are the 200 volt dc toolbuss power.

The center coax is the toolstringcommunication buss.

The upper end of the communication buss isterminated with 50-ohms in the GTET.

The lower end of the communication bussMUST be terminated with 50 ohms in thelower most tool (or bull-plug).

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DSNTDSNT--II

INSITE 31 + 1 Lower ConnectorConnects Directly to the SDLT Mandrel

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DSNTDSNT--II

When logged without the SDLT-IMandrel.

Must insert the X-Over sub

Upper 31 + 1 Insite connectorLower 12 +1 Insite connector

Sets both Mandrel Open and Close EOT linesa condition that cannot exist. So the DSN

instrument recognizes the SDL is notattached.

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DSNTDSNT--II

Master CalibrationWater Tank Background

Water Tank Ratio

Field Verifier

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DSNTDSNT--II

Master Calibration PreparationFill Water Tank

Install 31+1 to 12+1 x-over

Install 12+1 bull-plug to terminate bussInstall DSNT-I into water tank

Jumper GTET to DSNT-I

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DSNTDSNT

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PARAMETERSPARAMETERS

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Constant TemperatureConstant Temperature

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Gradient TemperatureGradient Temperature

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Tool TemperatureTool Temperature

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Constant PressureConstant Pressure

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Gradient PressureGradient Pressure

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Mud Weight PressureMud Weight Pressure

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Well ParametersWell Parameters

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DSNTDSNT--I LoggingI Logging

De-CentralizationDe-Centralize in boreholes7 7/8 up to 17 inches

Remove De-Centralizer in boreholesless than 7 7/8 inches

Align with SDLT-I Caliper

Use Indents for proper locationWithin 5 of top

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