There are many techniques to form a shield in ruqyah, by reading certain verses will form a type of shield that has a different karaterisktik depending on the type of verse that is read, for example if we read the verse of seats with the intention to form the body shiled from jin interference then dialam ghoib will form the air which is very hot that surrounds our body, this phenomenon has been proven many times by very many peruqyah and testimony of the patients (who feel hot, anxious, hot) and the jinn are not strong close to the body peruqyah.
And if we read other verses from the Qur'an with the intention of protecting ourselves from the criminals in the human realm, there will come a refuge of incompetence that the villain is approaching the body of his readers