Highland company?has been aiming the most advanced technology in the world in the petroleum equipment field. Relying on our enterprise spirit of credibility, pragmatic approach, innovation, and high efficiency, we developed high-temperature dual-metal oil extraction progressive cavity pump. The successful research and development of this products not only bring a revolutionary development in oil extraction of heavy oil, but also bring hope to other areas of screw pump applications. It also embodies the concept of the national low-carbon economy and scientific development, has a great and profound significance.