Abstract: The disclosure includes a system, method, and tool for logging while pulling. The disclosed system includes a tool and a bottom hole assembly, and the tool engages with the bottom hole assembly. The tool includes an elongated body, a retarder positioned on the elongated body, and a locking ring positioned on the elongated body. The retarder has at least one point of contact with an interior surface of a drill pipe. The disclosed method includes assembling the tool, providing a landing ring on a bottom hole assembly, free dropping the tool to the bottom hole assembly, and engaging the landing ring of the bottom hole assembly with the locking ring of the tool so that a portion of the tool extends below the bottom hole assembly.