Concepts and Theories

Throughout the visit to Schlumberger, you will be exposed to a wide range of learning opportunities that allow you to connect the things that we have learnt in school (sciences, humanities, entrepreneurship, etc.) and their application in the industries.



  • Magnetic flux density
    • Quanitity of magnetic field passing through an area
  • Eddy currents
    • Currents induced in conductors when a conductor is exposed to a changing magnetic field
  • Hysteresis
    • The dependence of a system not just on its current environment, but also on its past.
    • Hysteresis losses in transformers are by heat.
  • Magnetic wire
    • Copper wire with thin insulation used in laminations. It is not itself magnetised.
  • Lamination
      • Silicon steel plates with holes to slot magnet wire through in the motors

  • Silicon steel
    • Alloy consisting of iron, silicon and carbon
    • Used to minimise loss of magnetic flux
    • If silicon content is too low, the steel will be too soft. If the silicon content is too high, the steel will be too brittle.

  • American wire gauge
    • Wire size system

  • Standard wire gauge
    • Between each gauge, weight decreases by approximately 20%

  • Rotor
    • Moving part of motor

  • Stator
    • Stationary part of motor

  • Coupling
    • Device used to connect two shafts together to transmit power

  • Induction motor
    • An induction or asynchronous motor is a type of AC motor where power is supplied to the rotor by means of electromagnetic induction
Units of measure
  • Barrel, as a unit of volume
    • 1 oil barrel = 42 US gallons = 159 litres
  • Horsepower
    • Unit of power
    • 1 metric HP ≈ 735.5 watts

Electronics and programming
  • Source code
    • A text written using the format and syntax of the programming language that it is being written in
  • Binary code
    • A binary code is a way of representing text or computer processor instructions by the use of the binary number system's two-binary digits 0 and 1

  • G-force
    • Acceleration relative to the standard acceleration due to gravity g=9.80665m/s^2


Materials at oil well
  • Sand oil
    • Sands containing bitumen

  • Shale oil
    • found in kerogen in shale rock

Quality checking tools
  • Spectrometer
    • Uses the concept of emission spectrum to determine
      relative composition of the various elements in the alloy
      to be tested
    • Quality control of manufactured product
Other materials used
  • Manganese Phosphate
    • Used to prevent galling in the gas lift mandrels

  • Chromium
    • Transition metal
    • Added to steel produced in foundry to increase corrosion resistance

  • Nickel
    • Used to increase tensile strength of the alloy

  • Amine gas
    • To catalyse the bonding process in the cold box manufacturing of cores
    • A polyamide produced by Dupont


a. Supply chain

  • Bill of materials
    • List of materials and components needed to manufacture an end product

  • Confidence level
    • Statistical measure of the percentage of times that test results can be expected to be within a specified range

  • Lead time
    • The delay between the time and reorder point is reached and renewed availability
  • Safety stock
    • Level of extra stock that is maintained to mitigate risk of stockouts due to uncertainties in supply and demand

  • Z-factor
    • Measure of statistical effect size

  • Poisson distribution
    • Expresses the probability of a given number of events
      occurring in a fixed interval of time and / space if these events occur
      with a known average rate and independently of the time since the last event.

b. Management - Safety
  • Safety comes first
  • Anyone has the power to stop production the moment they see that safety is compromised
  • Respect for human life and not 'blinded' by the bottom-line


"Engineering research is different from scientific research. Scientific research adds on to
the existing knowledge, while engineering research puts things together to work according
to requirements and uses existing knowledge."
- Fraz Ahmad Kharal, an electrical engineer from Pakistan working in Schlumberger, Singapore