剪切闸板防喷器是井控设备的重要组成部分之一,其作用是在钻井过程中遇到突发情况时及时剪断钻杆并密封井口,其剪切性能直接关系到钻井作业的安全.以某新型上直下V结构的剪切闸板防喷器为研究对象,通过显示动力学模块对剪切闸板剪切钻杆的过程进行数值仿真模拟,分析研究闸板的剪切性能.并用该剪切闸板分别剪切5 in和5.5 in两种不同规格的S135钻杆,以研究其对不同规格钻杆的适应性,分析经验公式计算值和仿真值存在差异的原因,也探讨了在有井压,有悬重情况下剪切力的变化规律.结果表明:该新型剪切闸板能够顺利剪断5 in和5.5 in两种不同规格的S135钻杆,具有较好的适应性.并且经验公式相对保守,可采用适当系数进行修正.同时在有井压的情况下,剪切力随着井压增大而增大,当井压过大时,建议增加增压缸;在有悬重时,剪切力随悬重的增加逐渐下降,钻杆越长越利于剪切.该研究可以为剪切闸板防喷器的设计和使用提供技术指导.

In the physical model experiment, the polymer is usually manufactured by means of distilled water and sewage. In this paper, it was found by scanning electron microscopy that Ca2+ and Mg2+ contained in the formulated water reacted with -COO in the polymer. A sharp drop in the viscosity capacity of the solution, And the effect of Mg2+ on the viscosity of the solution is about 1.2 to 1.5 times than Ca2+. Metal ions have a negative impact on the extraction of polymers., The polymer's adaptability to three ply of oil layers is reduced. Under the condition of high extent of mineralization, the displacement characteristics of the high-efficiency,Viscosity and Salt-resisting polymer is better than middle-divided HPAM, and the enhanced oil recovery value is 3.13% higher than middle-point HPAM.

绚烂多彩的自然美景,深沉厚重的历史文化,迎着热闹的节日,蓬莱之美多次登上央视.海鸥是蓬莱的常客,更是不折不扣的“网红”,在央视频繁“抢镜”,成千万只海鸥翔集仙境海岸,吸引众多游客前来打卡合影.

Using the RD8000 to map pipeline routing, a non-contact metal magnetic memory detector is used to collect the tube segment signal directly above the buried ferromagnetic pipeline. The data is filtered through the Savitzky-Golay filter. It is found that when the magnetic induction normal component change gradient Kz crosses zero and the magnetic induction tangential component change gradient Ky has an extreme value, the feature position can be judged as the girth weld position. By comparing the relative distance ΔL1 of the adjacent ring welds in the magnetic signal diagram with the length ΔL2 of the construction period, the construction period number corresponding to the girth weld in the magnetic signal diagram can be matched. Finally, the GPS information collected by the magnetic memory tester is combined to determine the geographical position of the target ring weld.

通过对非接触式磁记忆技术基本原理和发展概况的调研,研究以金属磁记忆技术为基本原理来进行埋地铁磁管道环焊缝定位的技术.使用有限元仿真模拟确定埋地铁磁管道环焊缝的应力状况,建立检测方案并进行试验检测,对检测结果进行分析处理,对比有限元仿真的结果和金属检测的结果,验证所提检测方案的准确性.

1 前言 随着我国经济的快速增长,对能源的需求日益增长,高效清洁的天然气在燃气事业中占据重要的地位.目前,我国已建立了大规模的燃气输配管网,如西气东输等工程,由此而引发的燃气安全输送问题引起了格外关注,燃气调压器作为城镇输配管网的核心设备,是连接传输管道与居民之间的纽带,是安全供气的重要保障,因此确保燃气调压器的可靠性在保证运输安全中具有重大意义.燃气输送管道内存在多种类型的扰动,这些扰动对调压器的稳压性能产生影响,从而导致出口压力的波动.调压器出口压力若长期处于较大的波动范围,则可能缩短用气设备的使用寿命,导致设备气体的不正常燃烧,降低其热效率,甚至会引发火灾、爆炸、中毒等严重安全事故.

针对水合物混合浆体中存在少量天然气的问题,设计了一种适合水合物混合浆体除气除砂的新型水力旋流器—双锥-内锥型水力旋流器,采用有限体积数值模拟方法研究了颗粒粒径、锥角组合、进口压力对固体颗粒和天然气分离效率的影响.结果表明,固体颗粒粒径为50～90 μm、天然气气泡直径为400～800 μm、进口压力为4.3～7.3 MPa时分离效率最佳,最优的锥角组合为10°-5°.

为了提高井下防喷器旁通启闭短节密封性能分析的效率,基于Python语言和ABAQUS的GUI功能对ABAQUS进行二次开发,并提出一种参数化计算程序.所开发的程序能有效地减少利用ABAQUS研究并下防喷器旁通启闭短节密封时的重复工作,提高了工作效率.采用该程序分析不同载荷和配合锥角下旁通启闭短节阀芯-阀座的受力规律.结果表明:在阀芯-阀座的最大Mises应力不超过材料的屈服强度的情况下,随载荷的增大旁通启闭短节的密封性能变好,而随配合锥角的增大其密封性能变差.

皮碗是芯轴式清管器上的重要组件,皮碗需要具备密封流体形成驱动力、刮削管壁完成清洗并推动污垢前行等功能.文章分析了三种常见有唇皮碗的受力,建立了它们的力学模型;以针对(mm)管道的皮碗为研究对象,建立了皮碗的二维有限元模型;分别计算分析皮碗在不同唇长和不同工作压差时的最大接触应力、接触长度及接触应力分布规律;得到了皮碗在不同唇长和工作压差时皮碗的相关性能的变化规律.研究结果为实际工作中皮碗的选型与设计提供了理论依据.

According to the correlation properties of natural gas hydrate,several main methods of exploitation of natural gas hydrate are compared and summarized.Based on the current theory on hydraulic lifting process of the natural gas hydrate,the minimum lifting speed of the natural gas hydrate particles is studied,and the minimum velocity was calculated by using the theory of the minimum velocity of hydraulic lifting with the natural gas hydrate particles.The theoretical modeling of the pipeline transportation system of the hydraulic lifting system is carried out,and used to study the effects of particle size.The particle diameter is studied,and compared with that on the pressure drop of gas hydrate in the pipeline system.

Maleic anhydride grafted polyethylene-octene copolymer (POE-g-MA) was used to toughen calcium sulfate whisker/nylon 6 (CSW/PA6) composites,and mechanical,thermal,morphological'properties and processing performance of CSW/PA6 and CSW/POE-g-MA/PA6 composites were studied.The results indicated that the addition of appropriate CSW could increase both the stiffness and toughness of PA6.Compared with those of pure PA6,tensile strength,flexural strength,flexural modulus and notched impact strength of 10％CSW/PA6 composites increased by 7.5％,9.1％,21.1％ and 11.6％,respectively.However,when CSW content increased to 30％,the impact strength of PA6 decreased significantly.The presence of POE-g-MA promoted the homogeneous distribution of CSW in PA6 matrix,also enhanced the interfacial adhesion between CSW and PA6,resulting in significant improvement of impact strength of CSW/PA6 (30/70) composites.Due to the synergistic effect of CSW and POE-g-MA,the notched impact strength and flexural modulus of CSW/POE-g-MA/PA6 (30/5/65) composites increased by 36.8％ and 22.1％ compared with pure PA6,and its tensile and flexural strength were close to those of pure PA6.

The deep sea vehicle as an important deep-sea mining equipment,facing the complex bottom topography,deep sea vehicles planetary gear actuator need to complete crossing ditches and obstacles,moving up and down steps and many kinds of complex actions.According to the performance characteristics and transmission characteristics of the planetary wheel traveling mechanism,planetary gear train obstacle static model and the dynamic equilibrium equation were built to design and analysis traveling mechanism that complete crossing channel,obstacle,moving up and down stairs and other complex actions.The system simulation model of traveling mechanism was built based on ADMAS,vehicle unilateral obstacle,body across 900 mm trench and 42 degrees slope climbing processes are selected to analyze.The analysis results show that the vehicle planetary gear system in a good operating environment offer a safe condition that achieve design requirements.Design and analysis process for deep sea vehicle gear train movement execution system can provide a theoretical basis and reference research.

In order to eliminate the redundant moment of force of the electric load simulation system (ELSS) and improve the output accuracy of the system loading torque, a kind of adaptive control method for eliminating position disturbance torque of steering engine was designed.Based on the feed forward control and adaptive control theory, the effectiveness of the method was analyzed by MATLAB simulation software and the experimental verification was carried out.Simulations and experimental results showed that the method could adaptively adjust the system loading error, and the higher the frequency of the steering engine was, the longer the tracking error could be adjusted.In the same conditions of the loading torque and amplitude phase of the steering engine, the higher the steering engine frequency was, the more obvious the inhibitory effect of the control method to the redundant moment of force was.In the same conditions of the loading torque and movement frequency of the steering engine, the greater the amplitude phase of steering engine was, the more obvious the inhibitory effect was.The method can stabilize the system in an ideal output state by the output of the reference model when the actual system parameters are unknown or gradually changing.The research results have certain reference values for the design of aircraft electric load simulator.

以纳米蒙脱土为增强剂与丁腈橡胶、吸水树脂(交联聚丙烯酸钠)等共混,制备了遇水膨胀橡胶.用扫描电镜观察了遇水膨胀橡胶的形貌,测试了力学和吸水膨胀性能.结果表明,添加纳米蒙脱土能显著提高遇水膨胀橡胶吸水前后的力学强度,改善橡胶中吸水树脂的分散性,降低其质量损失率.另外,研究了纳米蒙脱土含量对遇水膨胀橡胶吸水率的影响,对遇水膨胀橡胶在酸、碱、盐水和高温去离子水等不同介质溶液中的膨胀行为进行了探讨.

In order to study the deposition safety of relay buffer, which is the most important part in the hydraulic lifting process of natural gas hydrate, so as to avoid the breakdown of the whole lifting system caused by the excessive deposition in relay buffer, the influence of different structures on the internal flow field of relay buffer under the same conditions and vol-ume was studied using the flow field simulation software CFD. The situation of particle deposition, internal flow velocity dis-tribution, particle size and sea water volume fraction distribution of three different structures of relay buffer, including cube, sphere and cylinder, were compared, and it showed that the safety of cylinder structure is better than the other two kinds of structure. The deposition situation and safety of cylinder structure under different conditions were studied with emphasis. The results showed that increasing the coarse particle concentration, coarse particle diameter and coarse particle density will all result in the increase of deposition thickness in relay buffer and the reduction of safety, while increasing the inlet velocity will lead to the decrease of deposition thickness in relay buffer and the improvement of safety.

为了探明在国内某气田使用的20G/316L双金属复合管出现失效的原因,通过对样品的失效形貌进行分析,结合有限元软件对焊接过程进行模拟,得知腐蚀严重的部位位于管道下部焊缝起弧点附近,主要腐蚀形式为点蚀,焊接应力对工件失效起到了促进和诱导的作用.研究表明,20G/316L双金属复合管的失效是焊接应力、腐蚀性介质Cl-和腐蚀原电池共同作用的结果.

基于混凝沉降原理,对旋流器和涡流反应器的结构进行改进,提出了一种新型旋流混凝设备,该设备集混合、絮凝、沉降于一体,介绍了其结构及工作原理.基于计算流体力学(CFD)方法,运用CFX软件对其内部流场进行了数值模拟分析,依据产水率、速度和速度梯度进行功能评价,以此确定结构优化方法.研究结果表明:对底流口口径、入流口结构、接触面圆角进行优化可以有效改善旋流混凝器的性能;采用对称双切向入口,上部出口交界面采用倒角,底流口直径小于30 mm,可达到旋流混凝器的设计功能要求.

Aiming to the surface water pollution situation and drinking water-induced disease in rural area of Jianghan Plain, the rural water purification scheme and technology were designed to meet the basic drinking water demand of rural populations. The designed technology considered both the tight-structure demand of integrated equipment and the water purification function;the ozone pre-oxidation and coagulating sedimentation are selected as pre-treatment, the reliable quartz sand filtering are se-lected as regular treatment and the ultraviolet sterilization and membrane separation are chosen as advanced treatment. Based on the technical design of water treatment, a set of hydro -cyclone and enhanced coagulation equipment is designed, which in-tegrates mixing, flocculating and settling. As a modularization design, the water purification system is tight in structure, conven-ient in installation and use, and provides a new method for the purification of drinking water in rural areas.

During the pigging, the cup of pig and pipeline interference fit each other, different contact stress exist between them when different interferences exist. Using the finite element method, four typical cups with interference 1% ~10% were ana-lysed. The maximum contact stress, contact length and the contact pressure distribution were analyzed. Results show that the maximum contact stress of disc cup is nearly linear increasing with the amount of interference, but the contact length is deter-mined by the thickness of cup. The maximum contact stress conical cup and dish cup increase slowly in bigger interference, but the contact length increases significantly. Circle cup have small maximum contact stress but big contact length.

The stress distribution of cylinder of double-layer shrunk-on ultrahigh pressure vessel under non-working condition and working condition was simulated by using finite element analysis software. The strength theory was used to optimize wall thickness and interference of the cylinder, which not only could decrease the interference to reduce installation difficulty, but also make stress distribution of each layer of cylinder achieve equal, stress change of the inner wall, inner tube to outer tube wall could be decreased, the tube material could be saved.