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A new drilling method-Earthworm-like vibration drilling.

Peng Wang1, Hongjian Ni1, Ruihe Wang2

  • 1Research Institute of Unconventional Oil & Gas and Renewable Energy, China University of Petroleum (East China), Qingdao, China.

Plos One
|April 12, 2018
PubMed
Summary
This summary is machine-generated.

Earthworm-like drilling significantly reduces borehole wall friction, enhancing load transfer in complex wells. This novel technology outperforms traditional methods, paving the way for deeper and more extended reach drilling operations.

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Area of Science:

  • Petroleum Engineering
  • Mechanical Engineering
  • Drilling Technology

Background:

  • Borehole wall friction impedes penetration rates and limits extended-reach drilling in complex wells.
  • Effective load transfer is crucial for overcoming these drilling challenges.

Purpose of the Study:

  • To introduce and evaluate a novel friction reduction technology called "earthworm-like drilling" for complex structural wells.
  • To improve load transfer capabilities and enhance drilling efficiency.

Main Methods:

  • Development and solution of a mathematical model based on the "soft-string" theory.
  • Comparative analysis of earthworm-like drilling against single-point vibration drilling.
  • Optimization of shaker placement using a projection gradient method for horizontal wells.

Main Results:

  • Earthworm-like drilling demonstrates superior performance in friction reduction and load transfer compared to single-point vibration drilling.
  • Pulse pressure amplitude and frequency, along with shaker installation position, significantly influence friction reduction.
  • Optimization of shaker positions in horizontal wells confirmed the technology's effectiveness.

Conclusions:

  • Earthworm-like drilling offers a feasible and advantageous solution for mitigating borehole friction.
  • The study provides a strong theoretical basis for the practical application of earthworm-like drilling in oil field operations.