Modelling of a Drill Bit Blaster


The drill bit blaster (DBB) studied in this paper aims to maximize drilling rate by creating drilling fluid pulsation, which could lead to lower drill string friction, more efficient removal of cuttings underneath the bit and increased nozzle fluid pressure and velocity; all of which could ultimately lead to more efficient cutting and transport of cuttings while drilling. A testing procedure was established in order to measure the fluid pulsations in above ground testing and to create a repeatable method of testing further designs. An analytical model was created in an attempt to predict and describe the pulsation pressure characteristics as a function of operating conditions and internal geometry and compared against experimental results. The results indicated that internal tool design and operating conditions have a significant effect on the pulsation frequency and amplitude. Application of this technology in future designs could allow the bit pressure oscillation frequency and amplitude to be optimized with regard to the lithology of the formations being drilled. This could lead to faster, more efficient drilling which could cut drilling costs and lead to a larger number of oil and natural gas plays being profitable.

Meeting Name

50th US Rock Mechanics / Geomechanics Symposium (2016: Jun. 26-29, Houston, TX)


Geosciences and Geological and Petroleum Engineering

Keywords and Phrases

Bits; Drill Strings; Drilling Fluids; Lithology; Natural Gas Well Drilling; Rock Mechanics; Above-Ground Testing; Internal Geometry; Oil And Natural Gas; Operating Condition; Pressure Characteristics; Pressure Oscillation; Pulsation Frequency; Testing Procedure; Transport Properties

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version


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© 2016 American Rock Mechanics Association (ARMA), All rights reserved.

Publication Date

01 Jun 2016

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