Quick Details Place of Origin: Shaanxi, China (Mainland) ,Brand Name: Senwell ,Type: Drill Collar ,Machine Type: Drilling Equipment ,Certification: API ,Material: Non-magnetic alloy steel ,Processing Type: Forging ,Use: Well Drilling, Standard: API .Packaging & Delivery Packaging Details: packing is according to customers' requirements Delivery Detail: 10-35 Days , Shipping: China main port (Tianjin & Shanghai for selection) , Our Services 1.Advanced equipment and techniques 2. Customized design 3.High quality products and the best services to meet the strict needs of our customers 4Our business philosophy of "people-oriented, customer first and reliability first" 5. Long-term cooperative relationships with more than a hundred famous and large manufacturers in China 6. Successfully exported to Europe, America, the Middle East, South Africa and Southeast Asia 7.Warranty