西南石油大学学报(自然科学版) ›› 1998, Vol. 20 ›› Issue (3): 55-58.DOI: 10.3863/j.issn.1000-2634.1998.03.015

• 钻采工艺与设备 • Previous Articles     Next Articles

Mechanistic Research on Self-excited Oscil-lating Impulse Jet Flow

Jiang Hai-jun, Liao Rong-qing
   

  1. (Dept. of Petroleum Engineering, SWPI, Sichuan, 637001 )
  • Received:1997-02-17 Revised:1900-01-01 Online:1998-08-20 Published:1998-08-20
  • Contact: Jiang Hai-jun

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Abstract: Firstly a brief review of previous researches on self-excited oscillating impulse jet flow (SEOIJF)is presented in the paper. Based on this and accord-ing to the theory of fluid network, we simplify the physical model of self-excited oscillating impulse jet flow by applying the principle of electric circuit with
load resistance. Based on analog, we build the math-ematical model. In discussing the solution of nonlin-ear equations, we analyze the formative mechanism of impulse jet flow by using the theory of modern self-organization.Because of the system’s complexity and the simulation’s approximation, if one wants to know under which conditions stable dissipation
structure and stable frequency can be formed, one may need to employ more complex analogy circuit with nonlinear analog and have more dependence on
detailed experimental studies.

Key words: Jet drilling theory, Nozzle, Oscillator, Pulse, Flow model, Mechanism

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