Dongying Lianfeng Petroleum Machinery Co., Ltd. is located in Dongying Economic Development Zone, the hinterland of Shengli Oilfield, the second largest oil field in China. It is mainly engaged in the production and sales of oil drill pipe joints. The company covers an area of more than 30 mu, with modern office environment, advanced production equipment and a number of high-quality scientific research and technical personnel, senior management personnel. The company can produce all kinds of steel grade and various types of joints, with an annual production capacity of more than 100000 pairs. The company has passed the American API certification and ISO9001 quality management system certification, and established a set of mature market operation system. The products are supplied to Shengli Oilfield, Zhongyuan Oilfield, Changqing Oilfield, Daqing Oilfield and Karamay Oilfield.
Advanced and excellent equipment is the guarantee of product quality. Lianfeng company pays attention to the quality of products and the renewal of production equipment. The main production equipment are: Speria pre pumping vacuum heat treatment furnace unit, cgk-46 CNC lathe, ce7132 profiling lathe, 6163 ordinary lathe, a1-245 pipe lathe, z5180 drilling machine, two column sawing machine, four column 1200 ton hydraulic press, etc. With raw material chemical analysis, mechanical performance testing, super strength magnetic particle flaw detector, automatic ultrasonic flaw detector, Brinell hardness tester, Rockwell hardness tester, vertical concentricity tester, thread single measuring instrument, thread gauge and other inspection equipment.
The material of drill pipe joint of Lianfeng company is aisi4137h (37crmnmo) high-quality alloy steel. The advanced production process and rigorous testing methods are used to produce the drill pipe joint in accordance with API standards. The product has the following advantages:
1. The most advanced Japanese speria-212 vacuum multi-purpose continuous furnace unit is used for quenching and tempering. The vacuum quenching and tempering unit ensures the hardenability and reasonable combination of strength and toughness, no oxide skin on the surface, uniform hardness, stable microstructure and good comprehensive mechanical properties. It can make the workpiece reach the standard mechanical properties and machinability, refine the grains and eliminate the structural defects.
2. The thread of drill pipe joint is processed by precision CNC thread lathe to ensure the geometric dimension of the thread. The single parameter, shape, surface roughness, precision, root arc size and comprehensive dimension of the thread are strictly controlled.
3. The thread surface is protected by phosphating or copper plating process. Zinc manganese phosphating solution is adopted for phosphating, electrolytic copper process is adopted for copper plating. The thickness of copper plating and phosphating layer is strictly controlled to make the joint have strong sealing performance, no sticking and prolong the service life of the joint.
Quality makes brand, quality creates advantage. The company has been committed to "quality win the market" of the assiduous exploration. With the development of Dongying economy relying on oil development, Lianfeng Petroleum Machinery Co., Ltd. will also change with each passing day. We insist that when interests conflict with quality, we choose quality. We are willing to work closely with our customers and become win-win partners. Welcome to visit and guide us.