快速加工轴类中心孔的组合夹具

作为石油装备制造企业，我厂每年要生产大量的双头螺柱，这类零件在加工外表面前必须加工A形中心孔。采用常规加工中心孔的方法（见图1），大约每件需180s，生产效率低。     

八槽式油套管接箍超声波自动清洗磷化装置

油套管接箍磷化是油套管制造过程中的关键工序,目前多采用的是强酸、强碱人工预处理,磷化质量差、效率低、操作环境恶劣、废液排放困难、污染环境,而且还会腐蚀接箍本体。采用超声波技术对接箍表面进行超声波清洗、漂洗及清水漂洗新工艺预处理,有效提高了磷化效果、螺纹的抗黏扣能力和生产效率,降低了能耗,节约了生产成本,实现了接箍磷化的机电一体化控制。     

施工条件下CO2泡沫压裂液的对流换热特性

Foam fracturing is an important technology in the development of low permeability oil/gas reservoirs. The heat transfer characteristics of foam fracturing fluid are directly relevant to the calculation of pressure drop in the well, the optimum choice of fracturing parameters and the accurate evaluation of fracturing results. CO2 foam fracturing fluid behaves as a non-Newtonian fluid. The convective heat transfer characteristics of CO2 foam fracturing fluid were experimentally investigated on the newly constructed large-scale test loop under downhole conditions with CO2 in supercritical state, the pressure up to 40MPa. From the test data, corresponding correlations for convective heat transfer were obtained and the influences of pressure, temperature and flow rate were also studied. The convective heat transfer coefficient increased with the increase of temperature and flow rate, while the effect of pressure was much more complicated. In most cases, with the increase of pressure the coefficient tended to decrease.     

粉末喷涂技术在防腐油管上的应用

通过对油井管腐蚀机理及防腐现状进行研究,分析了吐哈油田公司机械厂现有粉末喷涂防腐油管生产线存在的问题,综合比较了目前油井管防腐技术,提出了对生产线进行技术升级的方案。该生产线建成后,产品质量有保证,安全环保有保障,降低了生产成本。     

黑曲霉酸性β-甘露聚糖酶的发酵工艺

从数十株实验室保藏和土壤分离的黑曲霉菌株中 ,通过筛选和物理化学诱变 ,获得了 1株黑曲霉酸性 β 甘露聚糖酶高产菌株 AspergillusnigerL 76 1。经正交试验选出的最佳产酶培养基为 :魔芋粉 4 0 % ,豆饼粉 2 5 % ,玉米浆 1 5 % ,CaCl2 1 0 % ,KH2 PO4 0 1% ,Na2 HPO40 1% ,MgSO4 ·7H2 O 0 1% ,pH6 0。优化的发酵条件为 :装液量 30mL/2 5 0mL三角瓶 ,摇床转速2 2 5r/min ,发酵温度和时间分别为 ( 31± 1)℃和 84h。在上述条件下 ,L 76 1的 β 甘露聚糖酶发酵酶活力达 32 0U/mL。