scholarly journals Future Development of Water Control Methods in Air Drilling Operations

1959 ◽  
Vol 12 (12) ◽  
pp. 37-38
Author(s):  
Alan P. Roberts
Keyword(s):  
Future Development ◽  
Control Methods ◽  
Water Control ◽  
Air Drilling ◽  
Drilling Operations

Air Drilling Operations Improved by Percussion-Bit/Hammer-Tool Tandem

1986 ◽  
Vol 1 (05) ◽  
pp. 377-382 ◽  
Author(s):  
Maxwell C. Whiteley ◽  
William P. England
Keyword(s):  
Air Drilling ◽  
Drilling Operations

A Computational Model for Drilled Cutting Transport in Air (or Gas) Drilling Operations

1986 ◽  
Vol 108 (1) ◽  
pp. 8-14 ◽  
Author(s):  
M. P. Sharma ◽  
D. V. Chowdhry
Keyword(s):  
Computational Model ◽  
Carrying Capacity ◽  
Drill Pipe ◽  
One Dimensional ◽  
Gas Drilling ◽  
Solids Suspension ◽  
Solid Suspension ◽  
Air Drilling ◽  
Drilling Operations ◽  
Flow Stream

The hydrodynamics of isothermal, one-dimensional gas-solids suspension is theoretically analyzed. A computational model is developed. The model is applied in predicting the pressure drop distribution in air-sandstone mixture flows through a vertical annular space (simulating the flow stream between a bore hole and a drill pipe). The model can be applied to any isothermal, one-dimensional flow of gas-solid suspension. The numerical results are in satisfactory agreement with the experimental data collected from studies done on drilled cutting carrying capacity of air in air-drilling operations.

Dry and Compressed Air Cooling Comparative Study on 6061 Aluminium Alloy Drilling Using Coated Drill

2014 ◽  
Vol 903 ◽  
pp. 45-50
Author(s):  
Prasanth Asok ◽  
Palanisamy Chockalingam
Keyword(s):  
Surface Roughness ◽  
Aluminium Alloy ◽  
Feed Rate ◽  
Spindle Speed ◽  
Air Cooling ◽  
Cold Air ◽  
Dry Drilling ◽  
Air Drilling ◽  
Drilling Operations ◽  
6061 Aluminium Alloy

The use of aluminium alloy in the manufacturing industry has increased tremendously in the past decade mainly in the areas of aeronautics and automobiles. The ease of machinability of this material makes it a more desirable operand in manufacturing usage. Hence, in this research, a study was undertaken to perform a comparative analysis of dry and cold air drilling on 6061 aluminium alloy. The drill tool used in the drilling process was HSS Cobalt coated tool which has not featured in many research papers. Subsequently, the quality of each hole was identified based on the diameter accuracy of the hole and the surface roughness of the hole. A variation in the parameters was employed to identify the best feed rate and spindle speed that can accommodate a quality hole. In addition, during the drilling operations, force was measured to analyse the ensemble of parameters that present the highest and lowest force. Based on the data collected, an analysis was performed to identify the best quality hole. The force measured for cold air drilling was relatively lower than those measured in dry drilling primarily when high feed rate of 80 mm/min and high speed of 6000 rpm is used. The surface roughness and hole diameter does not differ much between cold air and dry drilling. Therefore, it is highly recommended that feed rate of 80 mm/min coupled with a spindle speed of 6000 rpm be used for drilling operations with a 5mm diameter tool.

Progress of Filling Layer of Self-Compacting Concrete in CRTS-III Type Track System

2012 ◽  
Vol 629 ◽  
pp. 438-442 ◽  
Author(s):  
Jian Qiang Cheng ◽  
Xiao Hui Zeng ◽  
Yan Ke Yang ◽  
Hai Peng Gu
Keyword(s):  
Quality Control ◽  
Influencing Factors ◽  
Future Development ◽  
Design Methods ◽  
Test Method ◽  
Railway Track ◽  
Control Methods ◽  
Self Compacting Concrete ◽  
Mix Proportion ◽  
Track System

In this paper,the functions and performances of filling layer of self-compacting concrete(SCC) in CRTS(China Railway Track System)-Ⅲ type track system were introduced. Developments of SCC including design methods and test method was described in detail. The influencing factors of workability of SCC was analysised. The trends of future development of mix proportion design methods,durability evaluation admixtures,applications were discussed.This paper also pointed that it's importance for SCC to studying the quality control methods and the application.

scholarly journals Control of the water-level in faintly sloping areas.

1953 ◽  
Vol 1 (3) ◽  
pp. 164-174
Author(s):  
F. Van Schagen
Keyword(s):  
Water Level ◽  
Control Methods ◽  
Water Control

Detailed diagrams and maps are given to supplement the account of water-control methods and installations in central, southern and eastern Holland. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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