【摘要】：超短半徑徑向水力噴射鉆井有利于停產(chǎn)井恢復(fù)生產(chǎn),提高油氣水開發(fā)效果。論文通過對(duì)5.5"套管內(nèi)撓性鉆管及轉(zhuǎn)向器工具進(jìn)行機(jī)理分析,對(duì)深部地層鉆進(jìn)不擴(kuò)孔轉(zhuǎn)向工藝進(jìn)行了概念化的設(shè)計(jì),對(duì)轉(zhuǎn)向過程及軌跡影響和撓性鉆管機(jī)械特性及參數(shù)進(jìn)行了分析優(yōu)選,為整套工藝實(shí)施奠定基礎(chǔ)。鉆管是實(shí)現(xiàn)噴射鉆進(jìn)完成90°轉(zhuǎn)向進(jìn)行徑向水力噴射的關(guān)鍵部件。通過室內(nèi)試驗(yàn)研究了撓性鉆管尺寸、材料等對(duì)轉(zhuǎn)向阻力的影響。結(jié)果表明:無內(nèi)壓條件下,其他參數(shù)相同時(shí),鉆管外徑越小轉(zhuǎn)向阻力越小;壁厚越小轉(zhuǎn)向阻力越小;塑性強(qiáng)度越小轉(zhuǎn)向阻力越小。經(jīng)對(duì)比優(yōu)選材料為0Cr17Ni12Mo2、尺寸為φ12x2.0mm的不銹鋼管作為鉆管。利用有限元分析了轉(zhuǎn)向阻力的影響因素,發(fā)現(xiàn)軌道軌跡的幾何參數(shù)、鉆管的材料及尺寸對(duì)轉(zhuǎn)向阻力影響較大。利用數(shù)值模擬,分析了鉆管的應(yīng)力分布,研究了轉(zhuǎn)向阻力隨軌道間隙等參數(shù)的變化規(guī)律,優(yōu)選了軌道內(nèi)徑為14mm和鉆管外徑為12mm的尺寸配合。針對(duì)送進(jìn)單元中鉆管屈曲的現(xiàn)象,對(duì)鉆管長度與扶正筒內(nèi)徑間的尺寸配合進(jìn)行了理論分析;基于水力參數(shù)計(jì)算,對(duì)撓性鉆管及連續(xù)油管等鉆管柱參數(shù)進(jìn)行了分析優(yōu)選。
[Abstract]:Ultra-short radius radial hydraulic jet drilling is beneficial to the resumption of production and the improvement of oil, gas and water development. Based on the mechanism analysis of 5.5 "casing flexible drilling pipe and steering gear tool, the steering process of drilling non-reaming hole in deep formation is conceptualized in this paper. The influence of steering process and trajectory and the mechanical characteristics and parameters of flexible drilling pipe are analyzed and optimized, which lays a foundation for the implementation of the whole process. Drilling pipe is the key component to realize 90 擄steering and radial hydraulic injection. The effects of flexible drilling pipe size and material on steering resistance were studied by laboratory test. The results show that under the condition of no internal pressure, the smaller the outer diameter of the drill pipe is, the smaller the steering resistance is, the smaller the wall thickness is, the smaller the steering resistance is, and the smaller the plastic strength is, the smaller the steering resistance is. The stainless steel pipe with the size of 蠁 12x2.0mm and 0Cr17Ni12Mo2 is selected as drilling pipe. The influencing factors of steering resistance are analyzed by finite element method. It is found that the geometric parameters of track trajectory, the material and size of drill pipe have great influence on steering resistance. The stress distribution of drilling pipe is analyzed by numerical simulation, and the variation of steering resistance with track clearance and other parameters is studied. The size matching of track inner diameter 14mm and drilling pipe outer diameter 12mm is optimized. Based on the calculation of hydraulic parameters, the parameters of flexible drilling pipe and coiled tubing are analyzed and optimized based on the theoretical analysis of the size matching between the length of drilling pipe and the inner diameter of centring tube in view of the phenomenon of buckling of drilling pipe in feed element, and based on the calculation of hydraulic parameters, the parameters of drilling string, such as flexible drilling pipe and coiled tubing, are analyzed and optimized.
【學(xué)位授予單位】：中國石油大學(xué)(華東)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE243

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