{"data":{"id":"us/30-cfr-250.511","jurisdiction":"us","citation":"30 CFR 250.511","heading":"Traveling-block safety device.","body":"All units being used for well-completion operations that have both a traveling block and a crown block must be equipped with a safety device that is designed to prevent the traveling block from striking the crown block. The device must be checked for proper operation weekly and after each drill-line slipping operation. The results of the operational check must be entered in the operations log.","path":["Title 30—Mineral Resources","CHAPTER II—BUREAU OF SAFETY AND ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR","SUBCHAPTER B—OFFSHORE","PART 250—OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF","Subpart E—Oil and Gas Well-Completion Operations"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"619698eeb60d7af66c76d3156532c0190f4e78c221a5bf4a0aa422ac1f82a6d8","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-250.510","next":"us/30-cfr-250.512"},"notice":"GroundRules: Original legal text. Not legal advice."}