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Title: Development of two-phase flow and material-transport models for large-diameter drilling systems: program overview and preliminary results

Abstract

This report describes the approach and preliminary results in investigating the behavior of fluid and material transport beneath a 20-ft-diam rotating drill bit assembly. Both analytical and laboratory models of this two-phase transport problem are being developed. Preliminary results obtained using a quasi-three-dimensional numerical model of the drilling system are described. In addition, analytical studies are in progress where a single cutter is isolated and the surrounding flow field is studied. A fully three-dimensional numerical model is described, along with examples of preliminary results. A brief similarity analysis and description of laboratory models under construction are also presented. Experiments using a single cutter to obtain material size distributions are discussed.

Authors:
 [1]
  1. (comp.)
Publication Date:
Research Org.:
Los Alamos Scientific Lab., NM (USA)
OSTI Identifier:
6165670
Report Number(s):
LA-8894-MS
ON: DE81030502
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 01 COAL, LIGNITE, AND PEAT; COAL MINING; DRILLING EQUIPMENT; ROTARY DRILLS; MATERIALS HANDLING; TWO-PHASE FLOW; COAL MINES; DRILL BITS; EXCAVATION; DRILLS; EQUIPMENT; FLUID FLOW; MINES; MINING; 420206* - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989); 012000 - Coal, Lignite, & Peat- Mining

Citation Formats

Gregory, W.S. Development of two-phase flow and material-transport models for large-diameter drilling systems: program overview and preliminary results. United States: N. p., 1981. Web.
Gregory, W.S. Development of two-phase flow and material-transport models for large-diameter drilling systems: program overview and preliminary results. United States.
Gregory, W.S. Wed . "Development of two-phase flow and material-transport models for large-diameter drilling systems: program overview and preliminary results". United States.
@article{osti_6165670,
title = {Development of two-phase flow and material-transport models for large-diameter drilling systems: program overview and preliminary results},
author = {Gregory, W.S.},
abstractNote = {This report describes the approach and preliminary results in investigating the behavior of fluid and material transport beneath a 20-ft-diam rotating drill bit assembly. Both analytical and laboratory models of this two-phase transport problem are being developed. Preliminary results obtained using a quasi-three-dimensional numerical model of the drilling system are described. In addition, analytical studies are in progress where a single cutter is isolated and the surrounding flow field is studied. A fully three-dimensional numerical model is described, along with examples of preliminary results. A brief similarity analysis and description of laboratory models under construction are also presented. Experiments using a single cutter to obtain material size distributions are discussed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jul 01 00:00:00 EDT 1981},
month = {Wed Jul 01 00:00:00 EDT 1981}
}

Technical Report:
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