Product Description Quick Details · Place of Origin: Hebei, China (Mainland) · Brand Name: Great · Model Number:   S617G · Type: Drill Bit · Machine Type: Drilling Equipment · Certification: API · Material: Alloy steel after heat treatment · Processing Type: Forging · Use: Well Drilling · size: 12 1/4'' · use: water well or oil well Packaging & Shipping 1).wooden box,iron box or as requested 2)By Express like TNT, DHL, UPS, Fedex, Aramex, suitable for small bits total weight less than 45kg 3). By Air, suitable for urgent orders, total weight exceed 45kg 4). By ship, suitable for large quantity, will take more shipping time   Our Services 1:24 hour uninterrupted service, answer your questions in a timely manner 2:Warmly welcome guests to visit 3.One of the largest manufacturers and suppliers in Asia. High technology, high quality. 4.Flexible production 5.Sincerely cooperate with you 6.Service to customer satisfaction Company Information GREAT is a leading supplier of premium drilling products and services to the worldwide Oil and Gas Industry.We specialize in designing, manufacturing and marketing of various high quality diamond drill bits for various petroleum drilling activities. Products series classified by cutting elements covers PDC bits, TSP bits, Natural diamond bits, impregnated diamond bits. Product series classified by purpose covers diamond drill bits, coring bits, bi-center bits and reaming tools while drilling. Size of various bits and special tools covers from 3-1/2” to 26”, includes standard size and nonstandard size.      Production Process   Exhibitions   Certificate