Product use: Calcium bromide is white particles or colorless yellowish transparent liquid, odorless, salty and bitter, easily soluble in water, mainly used as completion fluid, cementing fluid and workover fluid in offshore oil drilling. Calcium bromide liquid is a brine that can be used as a completion fluid to achieve the required specific gravity of 8.4-14.2 lb/hal. Advantages In order to avoid contamination of oil-bearing layers, make oil wells high and stable, so as to effectively improve oil recovery and prolong oil production life of oil wells, calcium bromide liquid can also be used in inverse emulsification aqueous system.