Electromagnetic M.W.D. - (E-Field)

Scientific Drilling's E-Field MWD uses Electromagnetic Wave Propagation to transmit down-hole data to the surface. Transmission of data is at least four times faster than conventional MWD mud pulse systems.

Main Features:

  • Tool O.D. is 1.75" and can be configured for use in collar sizes 3.5" to 9.5" O.D.

  • The tool length varies from 27 - 32ft.

  • The survey probe sensing point is 3 to 4 ft from the bottom of the tool.

  • The downhole sensor package includes:
    • Inclination

    • Tool face(Highside + Magnetic)

    • Azimuth

    • Vibration (Peak + Average)

    • Gamma (optional)

    • PWD pressure while drilling, (annular -pipe-differential) optional.
  • The MWD can be commanded from surface without the pumps on.

  • Data rates are such that a survey can be taken during pipe connections in less than 30 seconds.

  • Toolface updates are at 6 second intervals.  The raw magnetic vector components are transmitted when required to enable RANGING to be performed using a proprietary method, already fully tested on SAGD (Steam assisted gravity Drainage) well pairs.

Main advantages:
  • Operates with conventional mud even when lost circulation material is pumped.

  • Operates with no returns.

  • Operates when drilling with aerated mud (gas, nitrogen, air)

  • Operates when drilling on pure air (needs special SOFTRIDE drill collar, Scientific Patent).

  • Drilling with air can increase ROP by a factor of 4 compared to mud operations.

  • Save approximately 70% connection time while drilling with any medium.

  • Bi-directional communication.

  • No moving parts.

  • Minimal pressure drop.

  • Can be used for ranging.

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