The Fluidic Approach to Mud Pulser Valve Design for Measurement-While-Drilling Applications.

Abstract

The design and operation are described for three fluidic-type mud pulsing valves. In principle these valves employ centrifugal pressure forces in a confined vortex flow field to throttle the fluid (mud) which circulates through a drill pipe. Valves of this type can be used for transmitting diagnostic information in the form of binary coded pressure pulses. The pulses travel through the drilling mud between the drill bit and the surface while the well is being drilled. The report discusses the theoretical and simulated operation of vortex valves in a circulating mud system. Test data are presented which describe the steady flow and transient discharge characteristics of valves operating in a flow loop. The test data cover a flow range between 200 and 500 gal./min and a pulse frequency range between 1 and 10 Hz. Keywords: Measurement while drilling; MWD; Pulser; Mud pulser.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1985
Accession Number
ADA163613

Entities

People

  • Allen B. Holmes

Organizations

  • Harry Diamond Laboratories

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Properties
  • Acoustic Waves
  • Actuators
  • Amplifiers
  • Engineering
  • Flow
  • Flow Fields
  • Flow Rate
  • Flow Visualization
  • Fluid Mechanics
  • Fluidic Amplifiers
  • Frequency
  • Measurement
  • Mechanical Engineering
  • Radial Flow
  • Square Waves
  • Steady Flow

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