Extrong focus on design, menufacture, and field engineering of well completion system and tools. Supply professional and competitive service and products with experienced engineer team. Extrong has its own research and development team, precision machining workshop, function test laboratory.We advocate fair competition based on competitive strength.We are technology explorer in this field.We attach great importance to Health, Safety and Environment.Certified by API:Q1, 14A, 14L, 11D1(V0), 5CT(Threading), 7-1(Threading)For customers and partners, We can supply:1. Downhole tools design and design, meeting the requirements of various oilfield underground work environment.2. Manufacture and test of Downhole tools.For our suppliers:We respect our suppliers and welcome to contact with us if you can supply completitive service or products involved.