Wei Songbo, Shang Hongfei, Liao Chenglong, Huang Junyuan, Shi Bairu
PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China.
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China.
Biomimetics (Basel). 2019 Aug 5;4(3):54. doi: 10.3390/biomimetics4030054.
Plunger pumps are widely used in oil pumping units around the world. The water content of the wellbore is increasing along with the development progress, so the lubricating capacity of the well fluids between the plunger and barrel is decreasing correspondingly. Commonly, the substrate material of the plunger and barrel are stainless steel, and the plunger surface is usually covered with nickel-based coating. Therefore, the performance of the plunger and barrel has been affected due to poor lubrication and eccentric wear. Non-smooth surfaces have been proven to improve the tribology performance in many cases. A surface texturing plunger covered with specific dimples has been prepared by using laser surface texturing technology. The morphology of the surface texturing plunger was characterized and analyzed. The tribology performance of surface texturing plunger samples was tested using standard friction and wear test machines with oil and water lubrication, respectively. The results indicated that surface texturing could effectively reduce the coefficient of friction, and the wear resistance of the surface textured samples has been improved to some extent.
柱塞泵在世界各地的抽油机中广泛应用。随着开发进程，井筒中的含水量不断增加，因此柱塞与泵筒之间井液的润滑能力相应降低。通常，柱塞和泵筒的基体材料为不锈钢，柱塞表面通常覆盖镍基涂层。因此，由于润滑不良和偏磨，柱塞和泵筒的性能受到影响。在许多情况下，已证明非光滑表面可改善摩擦学性能。通过激光表面织构化技术制备了一种带有特定凹坑的表面织构化柱塞。对表面织构化柱塞的形貌进行了表征和分析。分别使用标准摩擦磨损试验机对表面织构化柱塞样品在油润滑和水润滑条件下的摩擦学性能进行了测试。结果表明，表面织构化可有效降低摩擦系数，表面织构化样品的耐磨性能在一定程度上得到了提高。
