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| 折扣與優(yōu)惠：團購最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘 要：鉆柱力學(xué)是關(guān)于井眼軌跡設(shè)計控制、鉆柱設(shè)計以及鉆進參數(shù)優(yōu)選的基礎(chǔ)。從鉆柱力學(xué)問題的提出、研究目標(biāo)與分析方法、鉆柱運動狀況、鉆柱力學(xué)的基本方程、下部鉆具組合受力情況、鉆柱振動等一系列方面綜合分析了鉆柱力學(xué)的發(fā)展現(xiàn)狀。到目前為止鉆柱力學(xué)已經(jīng)形成了一套比較完整的理論體系。利用縱橫彎曲梁方法研究鉆柱，可以有效的控制鉆頭的實鉆軌道，使之盡量靠近預(yù)定的理論軌道，準(zhǔn)確鉆達目標(biāo)區(qū)，從而降低鉆井成本，提高固井質(zhì)量，縮短完井周期。本文就是在縱橫彎曲法基本理論的基礎(chǔ)上，將下部鉆具組合在穩(wěn)定器處斷開并建立簡支梁模型，導(dǎo)出其力學(xué)模型，再利用邊界條件和連續(xù)條件求解三彎矩方程組，根據(jù)變截面縱橫彎曲梁理論所對應(yīng)的撓曲線微分方程和邊界條件及連續(xù)條件，能夠得出關(guān)于梁柱撓度和端部轉(zhuǎn)角的解析計算式，進而應(yīng)用縱橫彎曲理論解決有關(guān)的底部鉆具組合的受力分析問題。最后在此基礎(chǔ)上開發(fā)出配套軟件系統(tǒng)，對變截面鉆具組合的力學(xué)特性進行系統(tǒng)分析，并通過數(shù)據(jù)驗證了該理論的正確性。 關(guān)鍵詞： 鉆柱力學(xué)；底部鉆具組合；縱橫彎曲梁法；變截面；三彎矩方程
Abstract：Drill string mechanics is the basis of the design and control of borehole trajectory,the drill string design,and the drilling parameter optimization.The development of drill string mechanics is discussed from the perspectives of the introduction of the topic,the research objective,the methods employed for the research,the motion behavior of the drill string,the fundamental equation for of drill string dynamics,the stress analysis of the bottom hole assembly,the drill string vibration and so on.A relatively integrated theory has been developed for the drill string mechanics.Through the beam-column theory of drill problems,we can effectively control the actual drilling track,make it nearly orbital track which ever predicted,accurate drill targets,reduce costs,improve the well quality,shorten the completion period.The paper is based on the beam-column theory which is that put bend the lower part of the BHA in the stabilizer root as simply disconnect the number of beams.Then establish the mechanical model,and use the continuity conditions and boundary conditions to solve the three-moment equation.Based on the differential equations of deflection curve and conditions of continuity and boundary of non-uniform stiffness beam-column,the analytical calculation formulae for deflection and slope angles of beam-column are derived.Furthermore,applying beam-column theory principle of superposition,the mechanical force and BHA with variable gauge stabilizer can be solved.At last,On the basis of beam-column theory,deformations of the BHA（Bottom Hole Assembly） of variable cross section are analyzed and the analyzing software system has been developed.The mechanics characters have analyzed to the BHA of variable cross section and theory is proven through the data. Key words：drill string mechanics；BHA（Bottom Hole Assembly）；beam-column theory；non-uniform beams；three-moment equation |
