Sucker rod plays a very important role in rod pumping system. If the rod string is not designed properly, it will cause sucker rod failure and affect crude oil production. Allowable stress is the key data in the design of sucker rod string. In order to accurately analyze the allowable stress of sucker rod string, one-dimensional damping wave equation and finite difference algorithm are applied in this paper to accurately analyze the maximum stress, minimum stress and maximum allowable stress of each part of sucker rod string. It is possible to pay close attention to the stress situation of sucker rod and take corresponding measures to extend the service life of sucker rod. The example shows the maximum stress value of the sucker rod is not at or near the top of the cone, for directional wells, but at the maximum inclination angle of the well section. This indicates that the well section with large inclination angle in directional wells is more likely to fail the sucker rod than the top of the cone point. Therefore, we should pay close attention to the sensitive part with large inclination angle and dogleg degree and take corresponding measures to prolong the service life of the sucker rod.

长庆低渗透油田具有产液量低、井斜大、井深的特点,主要采用的游梁式抽油机举升工艺具有耗电高、系统效率低、泵效低,井筒偏磨严重的问题.为解决油田提质增效的瓶颈性问题,通过调研论证,开展了超长冲程采油技术高效举升试验,试验结果表明:超长冲程抽油机较常规技术在泵效、系统效率方面具有较明显的优势,技术经济性和节能降耗效益较好,可扩大试验规模.

Because of corrosion and third-party damage , loss of transmission medium , safety hazard and environmental pollution accidents can be caused in pipeline .To solve the above problem ,a chain-type plugging tool was developed to realize the rapid plugging of the pipe under the pressure condition .In combination with the actual scene ,a fast leak drainage pilot has been developed ,which can lead the leaking crude oil into the recovery tank to ensure that the emergency personnel can seal the pipe leak in 30 minutes .The above two kinds of tools meet the pressure of the pipeline and the demand for oil recovery ,which has the advantages of small volume ,easy to carry and simple operation .

The magnetic polymer microsphere catalysts based on phosphotungstic acid quaternary ammonium salt were designed and prepared in order to improve the performance and reusability of the catalysts during the epoxidation of cyclohexene. The structure, particle size and surface property of the new catalysts were characterized by FTIR, laser particle size analysis and SEM, respectively. And the reactivity of the catalysts was detected in cyclohexene epoxidation. Among the obtained catalysts, PS-double-D-PW4 catalyst exhibited the best catalytic performance and high stability for cyclohexene epoxidation. The results showed that the optimum yield of epoxycyclohexane was 83% with a selectivity above 95% after 7 h. And the catalyst still showed a conversion above 78% after six runs.

A series of supported catalysts using Co and Cu as main catalysts,Ni and Zr as sub-catalysts and TiO2 as carrier are prepared by the impregnation method,and then are characterized by XRD and IR.The catalysts are used in the liquid-phase catalytic oxidation reaction of p-cresol to make p-hydroxybenzaldehyde (PHBA) under ambient pressure,and results show that when n (Co2 +) ∶ n (Cu2 +) =3 ∶ 1,n (Co2 +) ∶ n (Ni2 +) =1 ∶ 0.06,n (Co2 +) ∶ n (Zr2 +) =1 ∶0.005,the catalysts have the best catalytic effect.At the same time,the influences of reaction parameters such as reaction temperature,molar ratio of NaOH to p-cresol,reaction time,oxygen flow rate and methanol dosage on the reaction are studied.On the basis of single factor experiments,the orthogonal experimentis designed to optimize reaction conditions,i.e.,reaction time being 5 h,reaction temperature 75 ℃,methanol dosage 30 mL,n (NaOH) ∶ n (PHBA) =5 ∶ 1,oxygen flow rate 50 mL/min,and then the yield of PHBA based on the amount of p-cresol is 92.58％.The prepared catalyst under ambient pressure exhibits excellent catalytic activity and reusability in the catalytic oxidation reaction of p-cresol.

Through the impregnation method,the magnetic magnesium oxide catalysts are prepared by using magnetic composite microparticles SiO2/Fe3O4 as carrier and are characterized by IR and X-ray diffraction.The influences of the prepared catalysts on synthesis of propylene carbonate by urea and 1,2-propylene glycol are studied.The catalyst prepared by using magnesium nitrate as precursor with a loading amount of 25％ (mass fraction),and being calcined at 600℃ has the best catalytic activity.Through analysis on the experimental results,the optimum reaction conditions are obtained as follows:catalyst mass fraction (accounting in all reaction materials) is 1.0％,n (1,2-propanediol) ∶n(urea) =2∶1,reaction time is 3 h and reaction temperature is 180 ℃.Under the optimal reaction conditions,the highest yield of propylene carbonate is up to 89.49％.The reaction is a heterogeneous catalytic system,and the catalyst can be easily separated from the products in the magnetic field environment due to the magnetic properties of the catalyst.

油田管道由于腐蚀、第三方损坏等原因发生穿孔后,容易造成输送介质的损失、安全隐患、环境污染事故等.针对以上问题,在充分调研的基础上,研制了链条式堵漏工具.通过在长输管道进行现场封堵试验,该工具由两人操作,可在30min内将管道泄漏口封堵,满足长输管道的带压快速堵漏要求,具有体积小、携带方便、操作简单等优点.

通过对镇一联原油脱水影响因素的分析,在2010年对镇一联原油脱水系统进行了扩建改造,增加了原油脱水能力,提高了脱水温度。并在上游站安装输油泵变频装置,保证了镇一联进液量的平稳。2011年研究筛选出了新型CDSPR-1原油破乳剂。该破乳剂是一种多重嵌段式聚醚类原油破乳剂,通过室内评价及现场试验,证明了该破乳剂破乳脱水效果较好,完全满足镇一联原油脱水要求,使该站破乳剂费用降低71.3%。

针对超低渗油田部分区块油井投产后见水问题,为准确判断出水层位,提高油井找堵水效率,研究了找堵水技术。该技术管柱主要包括Y441封隔器、Y341自验封封隔器和滑套开关等,适用于常规套管和小套管。经过5口井现场试验,平均单井日增油1.5t,提高了找堵水效率。

计量车标定过程中均为泄压标定,油井出液通过软管直接进入计量罐,原油中携带的伴生气排放,且不能真实反映油井正常生产时的出液情况,影响标定的准确性.因此,需要研制新型移动式单井计量装置,提高三叠系低产井带压标定和计量的精度.

目前三叠系油井计量主要采用功图法，但因单井产量低、气油比高等多种原因部分井计量误差较大，使用计量车放压标定也存在较大误差，不能准确反映油井生产情况。通过研制RJG—I移动式单井计量装置，经现场试验能够自动计量油井产出液的质量、体积、含水等，满足了三叠系油井带压标定及计量要求。与其它计量方式比较，该装置计量数据准确，计量过程密闭环保、自动控制，解决了三叠系油田高气油比油井计量问题。