A method for inspecting a wellbore. The method may include inducing a transient pressure pulse in the wellbore via a transient pressure pulse generator. The method may further include measuring a pressure trace of the transient pressure pulse using a pressure sensor proximate to the transient pressure pulse generator. The method may also include measuring a returned signature reflection of the transient pressure pulse using the pressure sensor. The method may further include comparing the pressure trace and the returned signature reflection to determine at least one of a type of flow barrier or a condition of the flow barrier.