Acoustic velocity logging system

Claim 1

AN APPARATUS FOR MEASURING THE ACOUSTIC WAVE TRAVEL TIME IN THE EARTH FORMATIONS SURROUNDING A BORE COMPRISING A SUPPORT ADAPTED TO BE LOWERED INTO SAID BORE, AT LEAST ONE ACOUSTIC WAVE TRANSMITTER AND TWO ACOUSTIC WAVE RECEIVERS MOUNTED IN LONGITUDINALLY SPACED APART RELATION ON SAID SUPPORT, MEANS CONNECTED TO SAID TRANSMITTER FOR ENERGIZING SAID TRANSMITTER AT EQUAL DEPTH INTERVALS IN SAID BORE, SAID TRANSMITTER BEING ADAPTED TO GENERATE AN ACOUSTIC WAVE IN SAID EARTH FORMATIONS UPON ENERGIZATION WHICH REACHES SAID RECEIVERS IN SUCCESSION, SIGNAL STORAGE MEANS SYNCHRONIZED WITH SAID ENERGIZING MEANS, MEANS COUPLED TO SAID RECEIVERS FOR IMPRESSING A SERIES OF SIGNALS ON SAID STORAGE MEANS AS SAID RECEIVERS ARE PASSED ALONG THE BORE, EACH OF SAID SIGNALS BEING REPRESENTATIVE OF THE TIME REQUIRED FOR AN ACOUSTIC WAVE TO TRAVEL THE DISTANCE BETWEEN SAID RECEIVERS, MEANS COUPLED TO SAID STORAGE MEANS FOR SIMULTANEOUSLY RECOVERING A PLURALITY OF SAID SIGNALS FROM SAID STORAGE MEANS AT A LATER INSTANT IN TIME, AND ADDING MEANS COUPLED TO SAID RECOVERING MEANS FOR DETERMINING THE ACOUSTIC WAVE TRAVEL TIME OVER A DISTANCE IN SAID FORMATIONS CORRESPONDING TO AN INTEGRAL MULTIPLE OF THE DISTANCE BETWEEN SAID RECEIVERS.

Claim 2

AN APPARATUS FOR MEASURING THE ACOUSTIC WAVE TRAVEL TIME IN THE EARTH FORMATIONS SURROUNDING A BORE COMPRISING A SUPPORT ADAPTED TO BE LOWERED INTO SAID BORE, AT LEAST ONE ACOUSTIC WAVE TRANSMITTER AND TWO ACOUSTIC WAVE RECEIVERS MOUNTED IN LONGITUDINALLY SPACED APART RELATION ON SAID SUPPORT, MEANS CONNECTED TO SAID TRANSMITTER FOR ENERGIZING SAID TRANSMITTER AT EQUAL DEPTH INTERVALS IN SAID BORE, SAID TRANSMITTER BEING ADAPTED TO GENERATE AN ACOUSTIC WAVE IN SAID EARTH FORMATIONS UPON ENERGIZATION WHICH REACHES SAID RECEIVERS IN SUCCESSION, SIGNAL STORAGE MEANS SYNCHRONIZED WITH SAID ENERGIZING MEANS, MEANS COUPLED TO SAID RECEIVERS FOR IMPRESSING A SERIES OF SIGNALS ON SAID STORAGE MEANS AS SAID RECEIVERS ARE PASSED ALONG THE BORE, EACH OF SAID SIGNALS BEING REPRESENTATIVE OF THE TIME REQUIRED FOR AN ACOUSTIC WAVE TO TRAVEL THE DISTANCE BETWEEN SAID RECEIVERS, MEANS COUPLED TO SAID STORAGE MEANS FOR SIMULTANEOUSLY RECOVERING A PLURALITY OF SAID SIGNALS FROM SAID STORAGE MEANS AT A LATER INSTANT IN TIME, AND ADDING MEANS COUPLED TO SAID RECOVERING MEANS FOR DETERMINING THE ACOUSTIC WAVE TRAVEL TIME OVER A DISTANCE IN SAID FORMATIONS CORRESPONDING TO AN INTEGRAL MULTIPLE OF THE DISTANCE BETWEEN SAID RECEIVERS.