K55 Casing Coupling 13-3/8inch

Place of Origin Tianjin, China (Mainland) Brand Name China Petroleum Equipment Model Number 4-1/2"-20" Type Coupling Machine Type Oil production Certification API Material Alloy steel Connection LTC STC BTC Surface treatment Whole phosphating, or inside phosphating and outside coating Usage Internally threaded cylinder for joining two lengths of threaded casing pipe Our Services/Warranty As a professional manufacturer, we provide follow services: 1.Lower price 2.ONE year