Zeta Potential Control for Simultaneous Enhancement of Penetration Rates and Bit Life in Rock Drilling.
Authors
Engelmann WH; Watson PJ; Tuzinski PA; Pahlman JE
Source
MISSING :18 pages
Link
NIOSHTIC No.
10005850
Abstract
In pursuit of innovative methods to improve mining productivity, the Bureau of Mines is investigating the use of inorganic salts as drilling fluid additives for penetration enhancement. Laboratory diamond drilling tests were performed on Westerly granite with aluminum chloride solutions and on Sioux quartzite with aluminum, aluminum nitrate, calcium, sodium, and zirconium chloride solutions as drilling fluid additives. These drilling results were compared with the average drilling performance using distilled, deionized water on Sioux quartzite (12 replicate tests) and Westerly granite (3 replicate tests). Maximum increases in penetration per given time and bit life were obtained when drilling with zero point of charge (zpc) concentration solutions of each additive. For Sioux quartzite, maximum increases in penetration and bit life ranged from 96 to 115 pct and 64 to 99 pct, respectively. For Westerly granite, maximum increases in penetration of 155 and 165 pct and bit life of 109 and 136 pct were obtained at or near zpc aluminum chloride concentrations of quartz (7.3 X 10-7 mol/l alcl3) and alkali feldspars (1.1 to 1.5 X 10-6 mol/l alcl3), respectively. This simultaneous increase in penetration per time together with extended bit life should result in increased productivity and reduced bit costs.
Links with this icon indicate that you are leaving the CDC website.
The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website.
Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website.
You will be subject to the destination website's privacy policy when you follow the link.
CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website.
For more information on CDC's web notification policies, see Website Disclaimers.
CDC.gov Privacy Settings
We take your privacy seriously. You can review and change the way we collect information below.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
Cookies used to make website functionality more relevant to you. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests.
Cookies used to track the effectiveness of CDC public health campaigns through clickthrough data.
Cookies used to enable you to share pages and content that you find interesting on CDC.gov through third party social networking and other websites. These cookies may also be used for advertising purposes by these third parties.
Thank you for taking the time to confirm your preferences. If you need to go back and make any changes, you can always do so by going to our Privacy Policy page.