All three phrases in the list are correct.
If you want to say that you will read it but not carefully, you could express it as, "I am going to skim through it." By saying that, you are conveying that you will read the entire thing, but you will not read it carefully.
To my ears, the three phrases given imply that you will be using the information you read at a later date. For example, a student might say the night before a test, "I am going to go over my notes."