本文選題：鉆井 + 爬行器��； 參考：《西安理工大學(xué)》2017年碩士論文

【摘要】：隨著勘探開發(fā)需求的持續(xù)增加,鉆井工作量大幅度上升。目前鉆井方式主要為轉(zhuǎn)盤帶動鉆桿的旋轉(zhuǎn)鉆井方法,這種方法具有較大不足。一方面,鉆桿振動會大大減少井下鉆具的壽命;另一方面,鉆桿跨度太長造成能量損耗太大,作業(yè)效率較低。本文提出使用組合鉆井裝置鉆井的方案,并對其進(jìn)行參數(shù)優(yōu)化。主要研究內(nèi)容如下:組合鉆井裝置由爬行器、井下動力鉆具、防失速工具和鉆頭四大部分組成。通過研究各個部分的結(jié)構(gòu)形式與工作特性,結(jié)合井下鉆進(jìn)的特點,最終確定出合理的結(jié)構(gòu)方案:爬行器選擇由鉆井液驅(qū)動的WWT型爬行器;井下動力鉆具選擇適合低鉆壓、大扭矩的螺桿鉆具;鉆頭使用PDC鉆頭;并且設(shè)計了防失速短節(jié)。針對所確定的組合鉆井裝置的結(jié)構(gòu)方案,進(jìn)行了四大組成部分三維模型的建立。包括各個部分的零件模型、裝配體模型的建立以及組合鉆井裝置的總裝配體模型的建立。對防失速工具進(jìn)行了運動仿真,驗證了結(jié)構(gòu)方案的合理性與可行性。通過參考鉆具標(biāo)準(zhǔn)連接螺紋,設(shè)計出連接件的結(jié)構(gòu)。分別使用數(shù)值方法、ANSYS有限元分析軟件對連接螺紋進(jìn)行了螺紋牙受載分析與結(jié)構(gòu)靜力學(xué)分析。通過對連接螺紋結(jié)構(gòu)中應(yīng)力分散槽的圓角半徑進(jìn)行優(yōu)化,得到了最優(yōu)圓角半徑,優(yōu)化后連接螺紋處的應(yīng)力集中現(xiàn)象得到了很好的改善。對組合鉆井裝置鉆進(jìn)水力參數(shù)進(jìn)行優(yōu)化。在傳統(tǒng)的水力參數(shù)優(yōu)化的基礎(chǔ)上,考慮了螺桿鉆具的壓降和循環(huán)壓耗,確定了適合組合鉆井裝置鉆井的鉆進(jìn)水力參數(shù)優(yōu)化方法。通過對具體鉆井實例進(jìn)行優(yōu)化設(shè)計,驗證了鉆進(jìn)水力參數(shù)優(yōu)化方法的正確性。本文為爬行器應(yīng)用于鉆井的進(jìn)一步研究做了有效工作,并且為組合鉆井裝置鉆井的鉆進(jìn)水力參數(shù)優(yōu)化研究提供了一定的依據(jù)。
[Abstract]:With the continuous increase of the demand for exploration and development, the drilling workload has increased by a large margin. At present, the main drilling method is rotary drilling, which is driven by rotary disc. On the one hand, the vibration of drill pipe can greatly reduce the life of drilling tool, on the other hand, too long span of drill pipe causes too much energy loss and low working efficiency. This paper presents a scheme of drilling with combined drilling unit and optimizes its parameters. The main research contents are as follows: the combined drilling device consists of four parts: crawler, downhole power drilling tool, stall control tool and drill bit. By studying the structure form and working characteristics of each part and combining the characteristics of downhole drilling, the reasonable structure scheme is finally determined: the crawler selects WWT crawler driven by drilling fluid, the downhole power drilling tool is suitable for low drilling pressure, High torque screw drilling tool; bit using PDC bit; and designed stall-proof short section. According to the structural scheme of the combined drilling equipment, the three-dimensional model of four components is established. It includes parts model, assembly model and assembly model of combined drilling equipment. The motion simulation of the stall prevention tool is carried out to verify the rationality and feasibility of the structural scheme. The structure of the joint is designed by referring to the standard thread of the drill tool. The numerical method and ANSYS finite element analysis software are used to analyze the thread tooth load and structure statics respectively. By optimizing the radius of the circular corner of the stress dispersion groove in the connection thread structure, the optimum radius of the circular corner is obtained, and the stress concentration phenomenon at the connection thread is improved very well after the optimization. The hydraulic parameters of combined drilling unit are optimized. On the basis of traditional hydraulic parameter optimization, considering the pressure drop and circulating pressure consumption of screw drilling tool, the drilling hydraulic parameter optimization method suitable for combined drilling unit is determined. The optimization method of drilling hydraulic parameters is verified by the optimization design of drilling examples. This paper provides an effective basis for further research on the application of crawler in drilling, and provides a certain basis for the optimization of drilling hydraulic parameters of combined drilling units.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE92

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