Completion & Workover designCompletion & Workover tools sale and service1.downhole tools selection, sales and onsite installation(including but not limited to each kind of tubing, screens, production packer, liner hanger, packer, bumper sub, downhole safety valve, setting sub, gas lift valve, chemical injection valve, ESP and other artificial lifting equipment2.Wellhead and X-mas tree sales and installation serviceDesign, manufacture, installation and maintenance for wellhead and X-mas t...