Patent ID: 8921769
Filing Date: 2014-12-30
Classification: G01V,H05H

Abstract:
1. An apparatus configured to estimate a value of a property of an earth formation, the apparatus comprising: a tool including a sealed container configured to be conveyed in a borehole; a radiation source on the tool configured to irradiate the earth formation from a plurality of axially spaced apart locations inside the sealed container by changing the axial position of the source of the irradiation; at least one detector configured to produce a signal responsive to interaction of the radiation with the earth formation; and at least one processor configured to estimate the value of the property using the signal; wherein the radiation source further comprises: a source of a beam of ions; a target extending axially along the sealed container; and a beam director configured to direct the beam of ions to at least two of the plurality of axially spaced apart locations by shifting the direction of the beam.