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125575

OPTIMIZATION OF DIAMOND CORE BIT PERFORMANCE UTILIZING HIGH ROTARY SPEED IN DRILLING LIMESTONE ROCKS

Article

Last updated: 26 Dec 2024

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Subjects

-

Tags

Mining and Metallurgical Engineering.

Abstract

The principal factors that require in predicting drilling rates are the operating parameters of the drill bits and the penetrated rock characteristics. The effect of some mechanical and geological parameters on the penetration rate during drilling limestone rocks has been previously carried out by using a low rotary speed of 400 rpm. In this work, the drilling trails were carried out on the same rocks and by using the same machine and bit at high rotary speed of approximately 1200 rpm. A fixed laboratory-diamond drilling machine was used to drill three types of limestone rocks utilizing rotational speed of 1200 rpm, and over a range of weights on bit (WOB). Operating parameters of the drill bit such as WOB, rate of penetration (ROP), torque and drilling specific energy (SE) were continuously monitored during the drilling trials. The effects of these parameters on the performance of the bit were examined. Relationships between WOB and both ROP, and SE were also described and the relationship between ROP and SE was also given. The obtained results were compared with that obtained by using a low rotary speed of 400 rpm. Increasing the rotary speed from 400 rpm to 1200 rpm increases the rate of penetration 3 times for Fresh limestone at the optimum weight on bit of 105 kg and this leads to decrease the specific energy. To obtain ROP of 0.5 cm/min as an example, the drilling machine needs S.E in Non-Fresh Limestone 3 times that for Fresh limestone and 2 times for Bedded limestone.

DOI

10.21608/jesaun.2010.125575

Authors

First Name

Mohamed A.

Last Name

Sayed

MiddleName

-

Affiliation

Professor at the Mining and Metallurgical Engineering Department, Faculty of Engineering, Assiut University, Assiut 71516, Egypt

Email

mohamad_sayed2007@yahoo.com

City

-

Orcid

-

First Name

Gamal Y.

Last Name

Boghdady

MiddleName

-

Affiliation

Professor at the Mining and Metallurgical Engineering Department, Faculty of Engineering, Assiut University, Assiut 71516, Egypt

Email

gamal_64@hotmail.com

City

-

Orcid

-

Volume

38

Article Issue

No 6

Related Issue

16878

Issue Date

2010-11-01

Receive Date

2010-08-11

Publish Date

2010-11-01

Page Start

1,531

Page End

1,543

Print ISSN

1687-0530

Online ISSN

2356-8550

Article File

JESAUN_Volume 38_Issue No 6_Pages 1531-1543.pdf

PDF . 530.3kB

Link

https://jesaun.journals.ekb.eg/article_125575.html

Detail API

https://jesaun.journals.ekb.eg/service?article_code=125575

Order

10

Type

Research Paper

Type Code

1,438

Publication Type

Journal

Publication Title

JES. Journal of Engineering Sciences

Publication Link

https://jesaun.journals.ekb.eg/

MainTitle

OPTIMIZATION OF DIAMOND CORE BIT PERFORMANCE UTILIZING HIGH ROTARY SPEED IN DRILLING LIMESTONE ROCKS

Details

Type

Article

Created At

23 Jan 2023