Flag Subs

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Products

World recognized leader in the tubular accessory market

Completion Equipment
Rod Pumping Well Equipment
Drilling Equipment
Fishing Tools
Washover Pipe & Accessories

The flag sub is placed immediately below the plug dropping head and swivel. The position of the flag indicates that the pump-down plug has been released from the head and has moved down the drill pipe.

Excellence since 1979

Crossover has been servicing the oil country tubular market since 1979. Our commitment to total quality has made us one of the leading manufacturers in the OCTG market. This assurance is recognized both domestically and internationally by major oil producers in their promotion and application of Crossover tubular products.