ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In oil drilling the failures of PDC drill bits are exhibited as erosive wear, dropping andbreaking of cutters, so the erosion and corrosion resistance of the matrix is one of the key factorsaffecting the quality of PDC bits. In order to understand the degradation mechanism of matrixmaterials for drill bits, a kind of loop recirculation rig is adopted to measure total mass loss TML,mass loss E by pure mechanical erosion, and then through calculation the mass loss C+S bycorrosion and synergy is obtained. The tested and calculated results show that TML of matrixmaterials is not only caused by pure mechanical erosion, but also by corrosion and their synergy ofmechanical erosion and corrosion. In the discussed scope of this paper the volume loss produced bycorrosion and synergy is 24.16% of the total volume loss (TVL) at most, which tells us that thecorrosion resistance of matrix materials should be considered carefully besides their erosiveresistance in the design and selection of PDC drill bits used in the corrosive drilling muds
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.171.pdf
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