本文選題：電動(dòng)鉆具　切入點(diǎn)：結(jié)構(gòu)設(shè)計(jì)　出處：《西南石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：在深井及超深井的石油鉆井作業(yè)中,相比于目前最常用的液壓驅(qū)動(dòng)鉆具,本文所研究的井下電動(dòng)鉆具工作時(shí)通過電纜由井下電動(dòng)機(jī)為鉆頭提供鉆井動(dòng)力,電能直接變換為機(jī)械能,因此不受其所處的工作深度、空間位置或泥漿液的影響,具有更高的鉆井效率。井下電動(dòng)鉆具技術(shù)的發(fā)展為鉆井作業(yè)過程的自動(dòng)化奠定了基礎(chǔ),因此對(duì)其進(jìn)行研究勢(shì)必受到石油鉆井行業(yè)的極大重視。保證井下電動(dòng)鉆具實(shí)際使用過程中的安全性能,可提升鉆井效率以及減少鉆井的成本。本文針對(duì)電動(dòng)鉆具工作環(huán)境的特殊性,對(duì)決定其工作壽命的重要零件分別進(jìn)行了有限元分析及井下鉆具系統(tǒng)進(jìn)行了動(dòng)力學(xué)分析,主要完成了以下研究工作:(1)對(duì)比分析了國(guó)內(nèi)外電動(dòng)鉆具的發(fā)展現(xiàn)狀,列舉了目前井下電動(dòng)鉆具的主要類型,根據(jù)電動(dòng)鉆具的工作原理,完成了電動(dòng)鉆具的整體結(jié)構(gòu)設(shè)計(jì)。同時(shí)確定了電動(dòng)鉆具的主要參數(shù):功率、電壓、力矩、鉆壓、減速器傳動(dòng)比等,從而確定了井下電動(dòng)機(jī)的輸出特性。(2)通過受力分析確定了井下力矩及鉆壓的傳遞方向,利用三維建模軟件Pro/E建立了電動(dòng)鉆具易損件——電機(jī)轉(zhuǎn)軸、定子殼體和輸出傳動(dòng)輸出軸的有限元分析計(jì)算模型,利用有限元分析軟件ANSYS,分別對(duì)其進(jìn)行了強(qiáng)度、疲勞強(qiáng)度、模態(tài)和線性穩(wěn)定性等分析,保證了鉆具的安全性能指標(biāo)。(3)利用拉格朗日方程對(duì)井下電動(dòng)鉆具系統(tǒng)進(jìn)行動(dòng)力學(xué)分析,分析并確定了該系統(tǒng)在扭矩作用下的運(yùn)動(dòng)規(guī)律。由第四章的關(guān)鍵零部件的有限元分析,可知：本文設(shè)計(jì)電動(dòng)鉆具在扭矩及鉆壓作用下,易損壞構(gòu)件的強(qiáng)度、疲勞性、及穩(wěn)定性等方面都達(dá)到要求。由第五章在扭轉(zhuǎn)力的作用下對(duì)井下電鉆系統(tǒng)進(jìn)行動(dòng)力學(xué)分析,可知:從角速度曲線來(lái)看,電動(dòng)機(jī)運(yùn)轉(zhuǎn)穩(wěn)定后,電機(jī)軸、減速器部分及鉆頭處角速度輸出曲線的變化是相似的,但角速度波動(dòng)范圍:鉆頭處的大于減速器處,減速器處大于電機(jī)軸處;從彈簧所承受的外力矩第一段扭轉(zhuǎn)彈簧所承受的外力矩變化幅度小于第二段扭轉(zhuǎn)彈簧所承受的外力矩變化幅度�？芍谂まD(zhuǎn)力作用下,波動(dòng)鉆壓通過等效后的扭轉(zhuǎn)彈簧對(duì)減速器及電機(jī)軸的影響逐漸減小。
[Abstract]:Compared with the most commonly used hydraulic driven drilling tools in deep and ultra-deep oil drilling operations, the electric drilling tools studied in this paper provide drilling power for the drill bit by cable through the downhole motor. Electric energy is directly converted into mechanical energy, so it is not affected by the working depth, space position or mud fluid, so it has higher drilling efficiency. The development of downhole electric drilling tool technology has laid the foundation for the automation of drilling operation. Therefore, the research on it is bound to be paid great attention by the oil drilling industry to ensure the safety performance of the downhole electric drilling tools in practical use. The drilling efficiency can be improved and the drilling cost can be reduced. In this paper, according to the particularity of the working environment of electric drilling tools, the finite element analysis and dynamic analysis of the important parts which determine the working life of electric drilling tools are carried out respectively. Mainly completed the following research work: (1) A comparative analysis of the development status of electric drilling tools at home and abroad, enumerating the main types of electric drilling tools in the downhole at present, according to the working principle of electric drilling tools, At the same time, the main parameters of electric drilling tools are determined: power, voltage, torque, drilling pressure, transmission ratio of reducer, etc. Thus, the output characteristic of the downhole motor is determined. (2) through the force analysis, the transmission direction of the downhole torque and the drilling pressure is determined, and the motor shaft is established by using the 3D modeling software Pro/E, which is the easily damaged part of the electric drill tool. The finite element analysis model of the stator shell and the output shaft of the output drive is analyzed by using the finite element analysis software ANSYS. the strength, fatigue strength, modal and linear stability of the stator shell and the output shaft of the output drive are analyzed respectively. The safety performance index of drilling tools is ensured. (3) the dynamic analysis of downhole electric drilling tool system is carried out by using Lagrange equation, and the motion law of the system under the action of torque is analyzed and determined. The finite element analysis of the key parts in Chapter 4th is introduced. It can be seen that the strength, fatigue and stability of the easily damaged components in the electric drill tool designed in this paper meet the requirements under the action of torque and drilling pressure. The dynamic analysis of electric drilling system is carried out in Chapter 5th under the action of torsional force. It can be seen from the angle velocity curve that the change of angular velocity output curve of motor shaft, reducer and bit is similar after the motor is running stably, but the range of angular velocity fluctuation is larger than that of reducer. The speed reducer is larger than the motor shaft, and the change of the external torque of the first section of torsional spring is smaller than that of the second stage of torsional spring. The effect of fluctuating drilling force on reducer and electric shaft is gradually reduced by equivalent torsional spring.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE92

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本文編號(hào)：1633109