Nan Gall — Energy Systems

measured performance

A comprehensive range of oilfield data acquisition systems

Production Logging Tools

Nan Gall Energy Systems produces Cased Hole Production Logging Tools for both Memory and SRO (Surface Read Out) operations, together with all the surface hardware and software required to produce API logs ready for analysis.

The downhole standard Production Logging Tool string is rated to a temperature of 175 ̊C and a pressure of 16Kpsi, and is available in both 1-3/8” and 1-11/16” versions*.

The Logging Tools interface with either a downhole memory module for slickline operations or a downhole telemetry module for electric line applications.

The downhole memory module is available in various data memory size options. The downhole telemetry module interfaces with a personal computer via a small surface interface box.

Nan Gall Energy Systems provides its own proprietary software (Uni-Soft) with each tool string to allow easy data processing, analysis and presentation.

The downhole logging tools include:

  • Pressure and Temperature Tools (Quartz or Strain)
  • External Temperature
  • Casing Collar Locator
  • Gamma Ray
  • Fluid Identification

Flowmeters

  • Fixed Bore (various sizes and configurations)
  • Full Bore (various sizes and configurations)
  • In-line (various sizes) together with standard accessories such as centralisers and knuckle joints.

(*A special tool string is available which is rated to 200 ̊C. Please contact us for details.)

Product Specification Table

Tool Type Outside Diameter Maximum Pressure Maximum Temperature GR Sensor GR Sensitivity Range GR Resolution
Gamma Ray / CCL 1.69” (4.29cm) 16,000psi (1103 bar) 175°C (347°F) Scintillator Crystal 0 - 20,000 API ± 1 API
Tool Type Outside Diameter Maximum Pressure Maximum Temperature Pressure Resolution Temperature Resolution Long-Term Drift
Correlation Tool 1.69” (4.29cm) 10,000psi (690 bar) 150°C (302°F) 0.01psi 0.01°C 15psi/annum
Tool Type Outside Diameter Maximum Pressure Maximum Temperature Pulse per Resolution Range Sensor Reference
Continuous Flowmeter 1.6878” (4.29cm) 16,000psi (1103 bar) 175°C (347°F) 10 5 - 5,000 ft/min Fixed Bore 3.5” from bottom
Tool Type Outside Diameter Maximum Pressure Maximum Temperature Density Range Density Resolution Viscosity Range Viscosity Resolution Temperature Range
Viscosity Fluid Density 2.125” (5.39cm) 10,000psi (690 bar) 175°C (347°F) 0 - 1.5 gm/cc 0.001 gm/cc 0 - 20,000 cP ± 0.1 cP 0.01°C
Cement VFD 2.75” (6.98cm) 10,000psi (690 bar) 175°C (347°F) 0 - 2.2 gm/cc 0.001 gm/cc - - -
Tool Type Outside Diameter Maximum Pressure Maximum Temperature Pulse per Resolution
Continuous Flowmeter 1.6878” or 1.375” 16,000psi (1103 bar) 175°C (347°F) 3-40% water, oil continuous mixture only

 

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