本文選題：潛油電泵　切入點(diǎn)：砂蝕　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：潛油電泵主要用于油井大排量抽吸液體,是油氣田穩(wěn)產(chǎn)、高產(chǎn)和經(jīng)濟(jì)效益較好的機(jī)械采油方式之一。由于采液強(qiáng)度增加,地層壓力逐步下降,砂巖承受載荷增加,導(dǎo)致膠結(jié)物受到破壞,引起油井出砂。潛油電泵在生產(chǎn)過程中要求井液含砂量不能超過萬分之五,含砂量過高則會(huì)造成潛油泵葉導(dǎo)輪磨損,排量效率下降;扶正軸承磨損,配合間隙增大,機(jī)組振動(dòng)加劇,保護(hù)器機(jī)械密封失效,井液進(jìn)入電機(jī);機(jī)組連接螺栓松動(dòng),甚至斷裂,導(dǎo)致機(jī)組掉井事故。如何改進(jìn)現(xiàn)有潛油電泵的防砂工藝、研發(fā)新型結(jié)構(gòu)防砂泵,有效延長(zhǎng)機(jī)組運(yùn)行壽命,已成為擺在各家機(jī)械采油設(shè)備供應(yīng)商面前的重要課題。本文從油井出砂對(duì)潛油電泵造成的損壞形式入手,運(yùn)用計(jì)算流體力學(xué)理論和Fluent分析軟件對(duì)潛油泵的主要過流部件葉輪和導(dǎo)輪進(jìn)行仿真分析,并對(duì)潛油電泵在含砂井中實(shí)際應(yīng)用時(shí)磨損發(fā)生的部位進(jìn)行統(tǒng)計(jì),對(duì)磨損原因進(jìn)行分析,并通過室內(nèi)試驗(yàn)進(jìn)行驗(yàn)證。針對(duì)磨損發(fā)生的部位及原因改進(jìn)葉導(dǎo)輪結(jié)構(gòu),選用硬度較高的材質(zhì)并合理設(shè)計(jì)扶正軸承位置,通過合理設(shè)計(jì)葉輪在導(dǎo)輪中的軸向串動(dòng)量、葉輪鎖緊結(jié)構(gòu)、改變機(jī)組安裝工藝,使?jié)撚捅霉ぷ鲿r(shí)葉輪上下蓋板不與導(dǎo)輪接觸,保證一定的懸浮量,在井液沖擊作用下砂礫不易積存,葉輪、砂礫、導(dǎo)輪三者間不發(fā)生硬摩擦。增強(qiáng)潛油電泵在高含砂井液中的適應(yīng)能力,有效解決了油井出砂造成的潛油電泵失效問題。本文研制的耐砂蝕潛油電泵機(jī)組經(jīng)公司技術(shù)部門鑒定驗(yàn)收后,將在國(guó)內(nèi)外含砂油田有較好的應(yīng)用前景,不僅能有效延長(zhǎng)機(jī)組在含砂井中的使用壽命,還能讓公司的產(chǎn)品性能跨上一個(gè)新臺(tái)階,增強(qiáng)公司參與國(guó)內(nèi)外市場(chǎng)的競(jìng)爭(zhēng)力,為公司創(chuàng)造巨大的經(jīng)濟(jì)效益和社會(huì)效益。研制過程中進(jìn)行的整體壓緊式潛油泵在工作時(shí)的軸向力測(cè)試將為整體壓緊式潛油泵設(shè)計(jì)和高承載止推軸承保護(hù)器研究提供相關(guān)數(shù)據(jù)。
[Abstract]:Electric submersible pump is mainly used for pumping liquid in oil wells with large displacement. It is one of the mechanical oil recovery methods with stable production, high yield and good economic benefit in oil and gas fields. Due to the increase of fluid recovery intensity, formation pressure decreases gradually, and the load on sandstone increases. During the production process of submersible oil pump, the sand content of well fluid should not exceed 5/10000. If the sand content is too high, it will cause wear of the impeller of the submersible pump and decrease of discharge efficiency. When the matching gap increases, the vibration of the unit intensifies, the mechanical seal of the protector fails and the well fluid enters the motor; the connection bolt of the unit is loosened or even broken, which results in the accident of the unit falling out. How to improve the sand control technology of the existing submersible electric pump, Research and development of a new type of structural sand control pump, which effectively prolongs the operating life of the unit, has become an important subject in front of various mechanical oil recovery equipment suppliers. This paper begins with the damage form caused by the oil well sand production to the submersible electric pump. By using the theory of computational fluid dynamics and Fluent software, the impeller and guide wheel of submersible pump are simulated and analyzed, and the wear position of submersible electric pump in sand well is counted, and the cause of wear is analyzed. According to the position and reason of wear, the impeller structure is improved, the material with high hardness is selected and the position of the bearing is reasonably designed, and the axial serial momentum of impeller in the guide wheel is reasonably designed. Impeller locking structure, changing the installation process of the unit, making the upper and lower cover plate of the impeller not in contact with the guide wheel when the submersible pump is working, ensuring a certain amount of suspension, the sand gravel is not easy to accumulate under the action of the well fluid impact, the impeller, the sand gravel, There is no hard friction among the three guide wheels. The adaptability of the submersible electric pump in the high sand well fluid is enhanced. The problem of submersible oil pump failure caused by sand production in oil wells is effectively solved. After the identification and acceptance by the technical department of the company, the submersible oil pump unit developed in this paper will have a good application prospect in sand bearing oil fields at home and abroad. It can not only effectively prolong the service life of the units in sand wells, but also enable the company to take its product performance to a new level and enhance the competitiveness of the company in participating in the domestic and foreign markets. The axial force test of the whole pressure tight submersible oil pump will provide the relevant data for the design of the integral pressure tight submersible oil pump and the research of the high bearing thrust bearing protector.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE933.3

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本文編號(hào)：1564319