The application situation and existing problems of CYJW18-5-105HF Pumping Units are introduced.It is discussed in the paper the improved design of Pumping Units in detail,including improved design of the main assembly structure,such as horse head,walking beam,equalizer,pitman,crank,base,framework and bearings,etc.The calculation of improved assembly structure,such as walking beam,pitman and equalizer are checked.Strength and stiffness of the framework are analyzed by finite element analysis software ANSYS.Conclusion shows that,the improved pumping units have reasonable structure,greatly improved dynamic performance and high safety performance.

To put drilling pumps in good operation order for a long period,enhancing production rate,reducing shotdown period and prolonging operation life,good maintenance was necessarily kept for drilling pumps.Therefore in consideration of their major parts including lubrication system,power end,rolling bearing and fluid end and based on the long application experiences,detail technical requirements for their maintenance are proposed for reference to the drilling engineers.

利用地震属性、碎屑岩岩性和骨架颗粒成分、重矿物组合、ZTR指数和倾角测井资料,为确定沙二段物源体系进行了研究.结果表明歧口凹陷沙二段发育6大物源体系:燕山褶皱带、沧县隆起、港西凸起、孔店凸起、埕宁隆起和沙垒田凸起.沧县隆起物源有葛沽、小站、增幅台和沈青庄4个物源口;歧北次凹是混合物源区,物源为北部燕山褶皱带和港西凸起.通过研究分析确定了各个物源体系的波及范围.

用亚硫酸钠在酸性条件下的较强还原性,将含铬废水中毒性强的Cr6+还原成危害性小的Cr3+,并转化为Cr(OH)3沉淀予以除去.其成本低、效果好,是一种合理、经济、稳定、可行的处理方法.