DNP-AB
Nuclear Dual Compensated Neutron w\ Epithermal Neutron Pad 

DNP-AB
Dual Neutron
Compensated
Neutron w\ Epithermal Neutron Pad

DNP-AB.png

  
Dual Neutron
Compensated
Neutron w\ Epithermal Neutron Pad

 

DNP-AB Presentation.png
 

 

Part No: 22006 – 4404

DESCRIPTION

The Dual Neutron Pad is a Compensated Neutron with Epithermal Neutron Pad (DNP) assembles to the Pad Deployment Tool (PDT) mandrel section for logging operations. The Pad Deployment Tool includes the caliper assembly.
 
The thermal section of the DNP uses Helium 3 detectors to measure the ratio of thermal neutrons at each detector. The ratio is corrected for hole size and a porosity is computed for a selected lithology. In addition, a caliper signal is recorded and used for the hole size correction.  The Epithermal section uses cadmium wrapped He3 detectors to measure fast neutrons for porosity calculations in air-drilled holes.  In addition, a caliper signal is recorded and used for the hole size correction.  All measurements are done simultaneously.

SPECIFICATIONS

Parameters
English
Metric
Pressure
20,000 PSI
1,379 bar
Temperature
350° F
177° C
Weight
41.89 lbs
19.0 kg
Tool Length
2.38 ft
0.73 m
Tool OD
4.75 in
12.06 cm
1 From end of top thread protector to end of bottom thread protector.
  Tool O.D includes PDT
 

COMBINABLE WITH

The DNP-AB is combinable with all TTI open hole tools. Place anywhere below the Gamma Ray/Spectral Gamma Ray (GRT) tools, but above the Phased Induction Tool (PIT).

REMARKS

 
The mandrel can be run in the eccentric mode to prevent caliper collapse in deviated wells.
 
 

 

LOGGING PARAMETERS

 
Parameter
English
Metric
Vertical Resolution
  PHIN
10 in
25.4 cm
Depth of Investigation
  PHIN
6 – 12 in
15 – 31 cm
Measurement Range
  PHIN
0 PU – 65 PU (LS)
Maximum Logging Speed
50 ft/Min
15.2 m/Min
Borehole Range
    Minimum
6.0 in
15.2 cm
    Maximum (PDT-GA)
18 in
45.72 cm
 

BOREHOLE ENVIRONMENT

Open, cased, or fluid-filled holes; fresh or salt muds.

DEFINITIONS

   PHIN = Porosity – Neutron
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