【摘要】：隨著技術(shù)的進步和材料的發(fā)展,反井鉆機的施工工藝得到了快速的發(fā)展。伴隨著國家近幾年大力投資水電行業(yè),實現(xiàn)水電工程立井斜井的安全快速旌工已經(jīng)成為反井鉆機技術(shù)推廣的最好契機。目前,反井導(dǎo)孔的偏斜問題已經(jīng)成為制約其發(fā)展的關(guān)鍵問題。本文依托于豐寧抽水蓄能電站上斜井反井施工研究課題,對反井鉆機導(dǎo)孔旌工中的鉆頭受力、鉆桿受力進行了一維二維建模分析,在此基礎(chǔ)上對鉆進參數(shù)和鉆具布置對于反井偏斜的影響進行了理論推導(dǎo)；然后利用Matlab數(shù)值計算軟件,對復(fù)雜的彎矩方程進行求解,并探討了無穩(wěn)定鉆桿和單穩(wěn)定鉆桿兩種情況下各種因素對于導(dǎo)孔偏斜影響狀況。分析了鉆壓、傾角、鉆具尺寸、穩(wěn)定鉆桿布置等因素對于導(dǎo)孔垂向偏斜力的影響。分析和計算了豐寧抽水蓄能電站上斜井的鉆具布置,設(shè)計了加厚型、螺旋型、軸承型三種不同形式尺寸的穩(wěn)定鉆桿,并在實際的鉆進中進行了試驗與對比。研究結(jié)果表明,在反井斜井工程中無論是在力學(xué)模型的理論計算數(shù)值求解中,還是在實際的鉆進過程中,鉆壓的增大都會使得導(dǎo)孔向下偏斜的趨勢減�。粚�(dǎo)孔偏斜對于穩(wěn)定鉆桿的布置間距非常敏感,存在一個合理的區(qū)間使得導(dǎo)孔最不易偏斜；螺旋穩(wěn)定鉆桿和帶軸承不旋轉(zhuǎn)穩(wěn)定鉆桿對于導(dǎo)孔偏斜的控制要好于傳統(tǒng)的直條型穩(wěn)定鉆桿；穩(wěn)定鉆桿穩(wěn)定翼加厚,越接近鉆頭的尺寸,導(dǎo)孔偏斜率越低；導(dǎo)孔向上偏斜時,導(dǎo)孔方位角變化更快,向右偏斜的程度越厲害。所以在反井鉆機的施工中對于鉆機方案設(shè)定和安裝時,要合理鉆具選型與布置,實時反饋偏斜情況調(diào)整參數(shù),盡量避免增斜情況的出現(xiàn)能有效的控制導(dǎo)孔的偏斜。為反井鉆機在大直徑斜井工程中的應(yīng)用和推廣提供技術(shù)參考。
[Abstract]:With the progress of technology and the development of materials, the construction technology of anti-well drilling rig has been developed rapidly. With the country investing heavily in hydropower industry in recent years, it has become the best opportunity to popularize the technology of counterwell drilling rig to realize the safety and speed of vertical inclined shaft in hydropower project. At present, the deflecting problem of anti-well guide hole has become a key problem restricting its development. In this paper, based on the research subject of inverse well construction in the upper inclined well of Fengning pumped Storage Power Station, the one-dimensional and two-dimensional modeling analysis of drill bit and drill pipe force in the guide hole of the anti-well drill rig is carried out. On the basis of this, the influence of drilling parameters and drilling tool arrangement on the deviation of anti-well is deduced theoretically. Then the complex moment equation is solved by using Matlab software, and the influence of various factors on the deflection of the guide hole is discussed in the case of unsteady drill pipe and single stable drill pipe. The effects of drilling pressure, inclination angle, drilling tool size and stable drill pipe arrangement on the vertical deflection force of the guide hole are analyzed. This paper analyzes and calculates the arrangement of drilling tools in the upper inclined well of Fengning pumped Storage Power Station, designs three kinds of stable drill pipes of thickening type, spiral type and bearing type, and carries out tests and comparisons in actual drilling. The results show that the increase of drilling pressure will decrease the downwardness of the guide hole in the reverse well inclined well engineering, both in the theoretical calculation of the mechanical model and in the actual drilling process. The deflection of guide hole is very sensitive to the spacing of the stable drill pipe, and there is a reasonable interval to make the guide hole most difficult to deviate. The control of guide hole deflection of spiral stabilized drill pipe and non-rotating stable drill pipe with bearing is better than that of traditional straight strip stable drill pipe, and the thickening of stabilizing wing of stabilizing drill pipe is closer to the size of drill bit, the deflecting rate of guide hole is lower. When the guide hole deflects upward, the azimuth of the guide hole changes faster, and the degree of deviation to the right is more severe. Therefore, in the process of setting and installing the drilling rig scheme, we should select and arrange the drilling tools reasonably, and adjust the parameters by feedback in real time so as to avoid the deviation of the guide hole effectively. It provides a technical reference for the application and popularization of reverse drilling rig in large diameter inclined well engineering.
【學(xué)位授予單位】：煤炭科學(xué)研究總院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TV554;TV53

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本文編號：2379366