Hwa Ok Lee

Learn More
—Electrical logging-while-drilling (LWD) tools are commonly used in oil and gas exploration to estimate the conductivity (resistivity) of adjacent earth media. In general, earth media exhibit anisotropic conductivities. This implies that when LWD tools are used for deviated and horizontal drilling, the resulting borehole problem may include dipping-layered(More)
We have isolated a gene, the c subunit (ATP6L) of vacuolar H(+)-ATPase, involved in oxidative stress response. In this study, we examined the role of ATP6L and its molecular mechanisms in glial cell death induced by H(2)O(2). Expression of the ATP6L gene was increased by H(2)O(2) treatment in C6 glial cells. ATP6L siRNA-transfected C6 cells treated with(More)
—Logging-while-drilling (LWD) borehole sensors are used to provide real-time resistivity data of adjacent Earth formations for hydrocarbon exploration. This allows for an proactive adjustment of the dipping angle and azimuth direction of the drill, and hence geosteering capabilities. The analysis of borehole eccentricity effects on LWD sensor response in(More)
  • 1