Patent ID: 8861307

Claim:
An acoustic borehole logging tool comprising: at least one acoustic source comprising a plurality of source elements wherein each of the plurality of source elements is independently controlled so that the acoustic source can generate a multipole acoustic signal along different orientations with respect to the tool; at least one acoustic receiver comprising a plurality of acoustic sensing elements wherein each of the plurality of acoustic sensing elements is independently recorded; a plurality of sensors for determining an instantaneous tool face angle; a source firing control which uses the instantaneous tool face angle to control a firing of the plurality of source elements so that a direction of the multipole acoustic signal generated by the acoustic source is controlled to be geostationary and has one or more predetermined geostationary directions; and receiver recording electronics which use the instantaneous tool face angle to appropriately combine as recording of the plurality of acoustic sensing elements so that the receiver records a multipole acoustic signal along a geostationary direction and wherein the geostationary direction is chosen from one or more predetermined geostationary directions.