A kind of combination rotary seal structure was designed to reach the rotary seal requirement of vertical drilling and directional drilling by analysis of working conditions and performance requirement.The combination rotary seal was composed of the mechanical seal,metal bellows and helical seal.The seal structure can be used in high temperature,high pressure,high speed and corrosion-resistant conditions,it improves the seal reliability and working life,and provides a new design method for rotary seal of down-hole devices and tools.

The directional rotary steerable drilling tool makes use of the bending deformation to achieve the purpose of navigational drilling.On the basis of bearing force analysis,the needle bearing was chosen to achieve the purpose of using the cantilever bearing in the upper part of the rotary shaft to restrict the bending of the shaft.However,the bending of the shaft will affect the operation and service life of the needle bearing.Through dynamic analysis of the bending deformation of the rotary,the deflection curve equation of the shaft in its static biasing condition was established to obtain the relation curve between the deflection value and the bias force concerning the shaft in needle bearing.The experiment was carried out to verify the rationality of the dynamic analysis.Through the experiment,the effect of the shaft bending on the operation of needle bearing in static and dynamic operating conditions was studied.The result indicates that the bending deformation of the shaft is the major reason for the failure of needle bearing.Adoption of combined bearing or cemented carbide bearing can change the force condition of the bearing so as to lengthen its service life.

分析了利用MATLAB将水轮机模型综合特性曲线处理成空间曲面的基本思想和流程。通过在四川紫坪铺水电站的应用,证明该方法简单易行,生成的数据误差小,精度能够满足工程要求。

The material cutting in the making of pressure containers generally adopts the common compasses approximate drawing method to make the lineation and therefore the lineation necessarily has some theoretical errors, further, the drawing method of the common compasses also has some deficiencies such as the complicated operating, inefficiency and so forth. A novel polyfunctional compasses is developed to improve the material cutting drawing method. Makeup and operating principles of the novel polyfunctional compasses are described, applications of it in the making of pressure containers are presented and drawing methods of the novel polyfunctional compasses are compared with that of common ones.

The valve device for injection-production integrated technology of heavy oil thermal recovery in slim holes is developed to make the measurement of the dynamic fluid level and the well flushing operation available without downhole operations in the process of the oil production. Furthermore, the characteristics, makeup and operating principles of the valve device are described, and the injection-production integrated technology is presented, which is applied to the small complex fault block heavy oil reservoir of the moderately deep to shallow thin beds in Henan Oilfield. The application of the valve device may make up for the deficiency of the current injection-production integrated technology for the heavy oil reservoir in Henan Oilfield.

The heavy oil reservoirs of Henan oilfield are such small complex fault blocks in shallow thin beds that their water and oil relationships are complex. As a result, there are troubles such as early water breakthrough, quick increasing water-cut and fast edge water incursion in the thermal recovery on slim-hole heavy oil well. To provide a novel blocking approach for the downhole high-temperature water resulting from these problems, a blocking technology with bridge plugs is developed. Firstly, two sets of assemblies with bridge plugs for the blocking technology are presented. Secondly, characteristics, structures, and operating principles of the key parts of the two assemblies such as the release sub and the novel bridge plug which is integrated with functions of releasing, seating, setting, unsetting are described. Lastly, field applications verified the feasibility of this blocking technology with bridge plugs. The results show that the development of this blocking technology with bridge plugs might provide sound support for economic and effective heavy oil recovery in low-grade reservoirs.

构造、流体、蚀变矿化是成矿作用过程中相互联系的有机整体(翟裕生等,1999),它们之间相互作用,共同构成构造-流体-蚀变矿化网络.构造控制了流体的运移方式、速率和方向,且为蚀变矿化提供有效的空间和部位;流体是携带成矿物质与能量的重要媒介,是促成构造活动、蚀变矿化的物质保证;蚀变矿化是构造、流体相互作用的结果.