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Lateral vibration and vibration control methods for ultra-deep well drill strings based on Cosserat geometrically exact beam theory 认领 引用
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作者 Fan Yu Yun-Hu Lu +4 位作者 Yan Jin Wei Li Bing-Qian Lv Hong-Jian Ni Gen-Lu Huang 《Petroleum Science》 SCIE EI CAS CSCD 2026年第5期2655-2685,共31页
In ultra-deep well operations,severe lateral vibration of drill string is a major factorin tool failure and decreased drilling efficiency.To investigate the vibration mechanisms and identify effective mitigation appro... In ultra-deep well operations,severe lateral vibration of drill string is a major factorin tool failure and decreased drilling efficiency.To investigate the vibration mechanisms and identify effective mitigation approaches,a dynamic model for lateral vibration in ultra-deep well drill strings was established using Cosserat geometrically exact beam theory.The model systematically examined the effects of rotational speed,WoB,andstabilizer position andsize on the vibration behavior.Key findings were validated against downhole measurement data from ultra-deep wells.Additionally,two control strategies leveraging modal competition and transverse wave disturbance were proposed.Results indicate that the bottom hole assembly(BHA)is particularly prone tointense lateral vibrations,with its vibrational modes governed by rotational speedand WOB.When the WOB isbelow the critical bucklingload,increasing either the rotational speed or WOBpromotes backward whirling of the BHA,thereby intensifying the vibration severity and bending stress.Conversely,when theWOB exceeds the critical buckling load,the system transitions into a buckling-whirling competition mode,resulting in a significant reduction in the vibration intensityand bending stress.This trend was reasonably verified through field data.Artificially inducingthis low-risk modal competition by adjusting theWOB and rotational speed can effectively reduce the probabilityof drill stringfailure.The motion of stabilizers shifts from forward whirling to backward whirling as the diameter decreases,which considerably alters the vibration-propagation patterns.The vibration-damping effects of both full-gauge and under-gauge stabilizers initially increase and then decrease as their installation position moves upward.Undergauge stabilizers exhibit less consistent behavior under non-severe vibration conditions;nevertheless,they can suppress severe whirling by interfering with adjacent drill string vibrations through lowfrequency transverse waves.They also demonstrate lower sensitivity to the installation position and enhance drill string safety through stress dispersion.Considering comprehensive vibration suppression,drill string integrity,and engineering applicability,installing under-gauge stabilizers can be a viable BHA optimization measure with significant practical value.This study provides a theoretical basis for vibration control in ultra-deep well drill strings,and the proposedstrategy offers valuable insights for improvingdrilling efficiency and ensuring operational safety. 展开更多
关键词 Drill string dynamics Geometrically exact beam Ultra-deep well Lateral vibration Vibration suppression
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Numerical study of material contrast effect on damage and instability in wellbores under repeated drill string impacts 认领 引用
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作者 Hadi Haghgouei Anders Nermoen Alexandre Lavrov 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第2期831-860,共30页
Drill string vibration during drilling plays a vital and potentially decisive role in maintaining wellbore stability,as repeated impacts may lead to fatigue and borehole collapse.While drilling through geological laye... Drill string vibration during drilling plays a vital and potentially decisive role in maintaining wellbore stability,as repeated impacts may lead to fatigue and borehole collapse.While drilling through geological layers,a material contrast may act as a localization point for wellbore damage.The hypothesis tested in this paper is that wellbore instability is focused on the boundary between the layers and that mechanical contrasts accelerate the wellbore collapse.In this study,an elastic-plastic damage model was employed to investigate the effects of repeated mechanical impacts on wellbore stability.A 2-dimensional(2D)model of a wellbore surrounded by contrasting materials was developed,and the accumulated damage caused by repeated lateral impacts was monitored.It was found that damage develops not only around the wall of the wellbore but also along the material boundaries.A sensitivity analysis was carried out to identify the impact of contrasts in both elastic(Young's modulus and Poisson's ratio)and plastic(cohesion,friction angle,and dilation angle)parameters between layers.Four damage patterns were identifiedin the simulated models.The results also suggested that the number of impacts required to reach the critical damage was highly affected by the contrast in elastic parameters,while cohesion and friction angle contrasts had a lesser effect.Additionally,increasing the contrast in the dilation angle localized the damage,thus reducing the number of impacts required to trigger wellbore failure. 展开更多
关键词 Wellbore stability Material contrast Geological layer Drilling Drill string Fatigue Cyclic load
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Numerical investigation of wellbore damage due to drill string lateral vibration 认领 引用 被引量：4
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作者 Hadi Haghgouei Anders Nermoen Alexandre Lavrov 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2025年第3期1287-1301,共15页
During drilling operations,cyclic loading is exerted on the wellbore wall by the vibrations of the drill string.This loading could lead to rock fatigue,which in turn might result in wellbore failure.In this study,a nu... During drilling operations,cyclic loading is exerted on the wellbore wall by the vibrations of the drill string.This loading could lead to rock fatigue,which in turn might result in wellbore failure.In this study,a numerical model is developed to simulate the effects of repeated loading on rock fatigue and failure.The simulation is based on an elasto-plastic constitutive model coupled with a damage mechanics approach,which allows us to examine the wellbore instability due to drill string vibrations.The model is verified with the existing data in the literature related to experiments on impact of a steel ball against a curved wall.The findings indicate that cyclic loading increases the development of plastic strain around the wellbore significantly compared to static conditions,promoting rock fatigue.Furthermore,the cyclic loading expands the radius of the yielded zone substantially,a critical factor for maintaining wellbore integrity.The proposed model can be used to evaluate the wellbore stability under repetitive loading caused by the drill string action. 展开更多
关键词 Wellbore stability Damage mechanics Fatigue modeling Drill string vibration
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The analysis of drill string dynamics for extra-deep wells based on successive over-relaxation node iteration method 认领 引用
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作者 Wen-Chang Wang He-Yuan Yang +4 位作者 Da-Kun Luo Ming-Ming You Xing Zhou Feng Chen Qin-Feng Di 《Petroleum Science》 SCIE EI CAS CSCD 2025年第8期3293-3303,共11页
The complex vibration directly affects the dynamic safety of drill string in ultra-deep wells and extra-deep wells.It is important to understand the dynamic characteristics of drill string to ensure the safety of dril... The complex vibration directly affects the dynamic safety of drill string in ultra-deep wells and extra-deep wells.It is important to understand the dynamic characteristics of drill string to ensure the safety of drill string.Due to the super slenderness ratio of drill string,strong nonlinearity implied in dynamic analysis and the complex load environment,dynamic simulation of drill string faces great challenges.At present,many simulation methods have been developed to analyze drill string dynamics,and node iteration method is one of them.The node iteration method has a unique advantage in dealing with the contact characteristics between drill string and borehole wall,but its drawback is that the calculation consumes a considerable amount of time.This paper presents a dynamic simulation method of drilling string in extra-deep well based on successive over-relaxation node iterative method(SOR node iteration method).Through theoretical analysis and numerical examples,the correctness and validity of this method were verified,and the dynamics characteristics of drill string in extra-deep wells were calculated and analyzed.The results demonstrate that,in contrast to the conventional node iteration method,the SOR node iteration method can increase the computational efficiency by 48.2%while achieving comparable results.And the whirl trajectory of the extra-deep well drill string is extremely complicated,the maximum rotational speed downhole is approximately twice the rotational speed on the ground.The dynamic torque increases rapidly at the position of the bottom stabilizer,and the lateral vibration in the middle and lower parts of drill string is relatively intense. 展开更多
关键词 Extra-deep well Drill string dynamics Calculation speed-up method SOR iteration method
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Optimal bit selection for large-diameter wellbore drilling in an ultra-deep well 认领 引用 被引量：1
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作者 CHEN Lili LI Wenzhe +5 位作者 GUO Jianhua LI Ke CAI Zhixiang WU Jie XU Weining ZHU Xiaohua 《Petroleum Exploration and Development》 SCIE 2025年第3期807-816,共10页
To optimize the bit selection for large-diameter wellbore in the upper section of an ultra-deep well S-1,a full-well dynamic model integrating drill string vibration and bit rock-breaking was established and then veri... To optimize the bit selection for large-diameter wellbore in the upper section of an ultra-deep well S-1,a full-well dynamic model integrating drill string vibration and bit rock-breaking was established and then verified using measured vibration data of drilling tools and actual rate of penetration(ROP)from Well HT-1 in northern Sichuan Basin.This model was employed to calculate and analyze drill string dynamic characteristics during large-diameter wellbore drilling in the Jurassic Penglaizhen Formation of Well S-1,followed by bit optimization.Research results show that during the drilling in Penglaizhen Formation of Well S-1,considering both the ROP of six candidate bits and the lateral/axialorsional vibration characteristics of downhole tools,the six-blade dual-row cutter bit with the fastest ROP(average 7.12 m/h)was optimally selected.When using this bit,the downhole tool vibration levels remained at medium-low values.Field data showed over 90%consistency between actual ROP data and dynamic model calculation results after bit placement,demonstrating that the model can be used for bit program screening. 展开更多
关键词 ultra-deep well exploration well bit selection drill string dynamics drill string vibration rate of penetration
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Dynamic Response of Two-Degree-of-Freedom Riserless Drill String for Vortex-Induced Vibration Suppression and Enhancement 认领 引用
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作者 WANG Yu LOU Min +1 位作者 WANG Yangyang ZHANG Chen 《Journal of Ocean University of China》 SCIE CAS CSCD 2023年第3期612-626,共15页
The mechanical behavior,dynamic evolution,and flow-field distribution of a two-degree-of-freedom riserless drill string were simulated numerically by using FLUENT fluid simulation software with the user-defined functi... The mechanical behavior,dynamic evolution,and flow-field distribution of a two-degree-of-freedom riserless drill string were simulated numerically by using FLUENT fluid simulation software with the user-defined function embedded.The rotation angular velocities before and after the critical rotation angular velocity were used as independent variables,and the reduced velocity range was 3-14.Fluid-structure coupling was realized based on the dynamic overset grid and the SST k-ωturbulence model.Results reveal that the dynamic response of the riserless drill string was considerably affected by rotation and flow velocity,which are coupled with each other.The cross-flow average dimensionless displacement increased with the rotation angular velocity,and rotation considerably enhanced the in-line maximum average dimensionless displacement.However,the cross-flow amplitude caused by vortex-induced vibration was suppressed when the rotation angular velocity reached a certain value.The in-line and cross-flow frequencies were the same,thereby causing the trajectory to deviate from the standard'figure-eight'shape and become a closed circle shape.The vortex did not fall behind the cylinder at low reduced velocity with high-rotation angular velocity,and the structure of the near-wake vortex remained U-shaped.The wake of the cylinder was deflected along the cross-flow direction,thereby leading to vibration asymmetry and resulting in increased vibration instability and disordered vibration trajectories,especially at high-rotation angular velocities. 展开更多
关键词 riserless drill string two-degree-of-freedom vortex-induced vibration rotation dynamic response
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NEW METHOD FOR GEOMETRIC NONLINEAR ANALYSIS OF LARGE DISPLACEMENT DRILL STRINGS 认领 引用
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作者 谈梅兰 王鑫伟 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2005年第7期921-928,共8页
Based on the actual measured well depth, azimuth and oblique angles, a novel interpolation method to obtain the well axis is developed. The initial stress of drill string at the reference state consistent with well ax... Based on the actual measured well depth, azimuth and oblique angles, a novel interpolation method to obtain the well axis is developed. The initial stress of drill string at the reference state consistent with well axis can be obtained from the curvature and the tortuosity of well axis. By using the principle of virtual work, the formula to compute the equivalent load vector of the initial stress was derived. In the derivation,the natural （curvilinear） coordinate system was adopted since both the curvature and the tortuosity were generally not zero. A set of displacement functions fully reflecting the rigid body modes was used. Some basic concepts in the finite element analysis of drill string were clarified. It is hoped that the proposed method would offer a theoretical basis for handling the geometric nonlinear problem of the drill string in a 3-D larg edisplacement wellbore. 展开更多
关键词 finite element geometric nonlinearity numerical simulation drill string
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Influence of friction on buckling of a drill string in the circular channel of a bore hole 认领 引用 被引量：2
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作者 Valery Gulyayev Natalya Shlyun 《Petroleum Science》 SCIE CAS CSCD 2016年第4期698-711,共14页
Enhancement of technology and techniques for drilling deep directed oil and gas bore hole is one of the most important problems of the current petroleum industry.Not infrequently, the drilling of these bore holes is a... Enhancement of technology and techniques for drilling deep directed oil and gas bore hole is one of the most important problems of the current petroleum industry.Not infrequently, the drilling of these bore holes is attended by occurrence of extraordinary situations associated with technical accidents. Among these is the Eulerian loss of stability of a drill string in the channel of a curvilinear bore hole. Methods of computer simulation should play a dominant role in prediction of these states. In this paper, a new statement of the problem of critical buckling of the drill strings in 3D curvilinear bore holes is proposed. It is based on combined use of the theory of curvilinear elastic rods, Eulerian theory of stability, theory of channel surfaces, and methods of classical mechanics of systems with nonlinear constraints. It is noted that the stated problem is singularly perturbed and its solutions have the shapes of localized harmonic wavelets. The calculation results showed that the friction effects lead to essential redistribution of internal axial forces, as well as changing the eigenmode shapes and sites of their localization. These features make the buckling phenomena less predictable and raise the role of computer simulation of these effects. 展开更多
关键词 Directed bore hole Drill string Critical states Singular perturbation Friction forces Harmonic wavelet
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METHOD OF EQUILIBRIUM DIFFERENTIAL EQUATION FOR ANALYSIS OF STRENGTH OF LARGE DEFLECTION DRILL STRING 认领 引用
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作者 刘延强 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2000年第11期1292-1299,共8页
To counter the strength problem of drill string in well of large curvature and small diameter, well axis was taken as datum mis. Based on description of deflection of well an's and on analysis of three dimensional... To counter the strength problem of drill string in well of large curvature and small diameter, well axis was taken as datum mis. Based on description of deflection of well an's and on analysis of three dimensional forces of a small section of drill string, equilibrium differential equations of large deflection drill string were established. The internal forces were found by Longe-Kutta method. The stresses were found by using them and the strength prerequisite was established. Stresses of drill string in lateral horizontal well H767 were computed. The results are in agreement with those of finite element model and soft-rope rigidified model. But the method is simpler for computation than finite element model and is more perfect than soft-rope rigidified model. Curvature of the well is too large and there is stress concentration so that the fraction accident of drill string occurs. 展开更多
关键词 lateral horizontal well large deflection drill string stress strength equilibrium differential equation
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THREE-DIMENSIONAL NONLINEAR ANALYSIS OF DRILL STRING STRUCTURE IN ANNUI US 认领 引用
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作者 刘延强 吕英民 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1994年第3期275-290,共16页
Three-dimensional nonlinear analysis of drill string structure in annulus of curvedwellbore is done by using the theory of finite element and Newton-Raphson method.According to the characteristics of its deformation,a... Three-dimensional nonlinear analysis of drill string structure in annulus of curvedwellbore is done by using the theory of finite element and Newton-Raphson method.According to the characteristics of its deformation,a method of the description andcomputation of taking different forms of elements for different parameters is advanced.The penalty function method is applied for finding the unknown boundary .the nonlinear effects of curvature of wellbore on the side forces on bit ae shown by thecomputation. 展开更多
关键词 Newton-Raphson method. penalty function method. nonlineareffect. drill string
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Critical Buckling of Drill Strings in Cylindrical Cavities of Inclined Bore-Holes 认领 引用 被引量：1
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作者 Nabil Musa Valery Gulyayev +1 位作者 Nataliya Shlyun Hasan Aldabas 《Journal of Mechanics Engineering and Automation》 2016年第1期25-38,共14页
Notwithstanding the fact that the problem of drill string buckling （Eulerian instability） inside the cylindrical cavity of an inclined bore-hole attracts attention of many specialists, it is far from completion. Thi... Notwithstanding the fact that the problem of drill string buckling （Eulerian instability） inside the cylindrical cavity of an inclined bore-hole attracts attention of many specialists, it is far from completion. This peculiarity can be explained by the complexity of its mathematic model which is described by singularly perturbed equations. Their solutions （eigen modes） have the shapes of boundary effects or buckles （harmonic wavelets） localized in zones of the bore-hole that are not specified in advance. Therefore, the problem should be stated in the domain of entire length of the drill string or in some separated part including an expected zone of its buckling. In the paper, a mathematic model for computer analysis of incipient buckling of a drill string in cylindrical channel of an inclined bore-hole is elaborated. The constitutive equation is deduced with allowance made for action of gravity, contact, and friction forces. Computer simulation of the drill string buckling is performed for different values of the bore-hole inclination angle, its length, friction coefficient, and clearance. The eigen values （critical loads） are found and modes of stability loss are constructed. The numerical results for the case when the inclination angle equals friction angle coincide with ones obtained analytically. 展开更多
关键词 Deep drilling inclined bore-holes drill strings stability singularly perturbed problem.
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特深层小井眼钻井钻柱系统动力学特性 认领 引用 被引量：1
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作者 祝效华 成耀杰 刘伟吉 《中国石油大学学报（自然科学版）》 EI CAS CSCD 北大核心 2026年第1期125-134,共10页
目前基本建立了解决超深井的钻井技术体系,但在特深级万米井方面还处于研究空白。探究特深层小井眼钻进中钻柱的动力学特性是保障钻柱安全以及高效破岩的重要基础。但目前针对特深层小井眼钻柱的动力学研究仍然匮乏。建立特深层钻井的... 目前基本建立了解决超深井的钻井技术体系,但在特深级万米井方面还处于研究空白。探究特深层小井眼钻进中钻柱的动力学特性是保障钻柱安全以及高效破岩的重要基础。但目前针对特深层小井眼钻柱的动力学研究仍然匮乏。建立特深层钻井的全井钻柱系统动力学数值模型,分析不同细长比钻柱在同一井深下的屈曲变形、动态应力以及振动情况。结果表明:随着钻柱细长比的不断增加,钻柱底部的受压区域长度会不断增加,使钻柱的屈曲变形更加复杂,钻柱所受压应力和剪切应力增大,钻柱的横向振动减小,轴向振动和扭转振动增大,底部钻具组合起到的稳定效果也会减弱;当钻柱细长比增大至1.29×105时,由于钻柱尺寸减小而带来的动力学响应会更加剧烈。 展开更多
关键词 特深层 钻柱系统 小井眼 动力学 钻井提速
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特深井大陆科学钻探绳索取心技术挑战与展望 认领 引用
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作者 岳文 梁健 +9 位作者 张恒春 朱丽娟 朱丽娜 王志乔 王瑜 贾建波 薛启龙 刘凡 徐良 王金印 《钻探工程》 2026年第4期1-13,共13页
特深井大陆科学钻探是揭示地球深部物质组成、构造演化与资源潜力的关键途径,岩心是解读地层信息的第一手实物证据。绳索取心作为高效获取岩心的核心技术,直接决定取心质量与钻探效率。然而,超万米钻探受超高温、超高压、高应力与复杂... 特深井大陆科学钻探是揭示地球深部物质组成、构造演化与资源潜力的关键途径,岩心是解读地层信息的第一手实物证据。绳索取心作为高效获取岩心的核心技术,直接决定取心质量与钻探效率。然而,超万米钻探受超高温、超高压、高应力与复杂地层的共同作用,易造成钻头寿命缩短、密封失效、岩心卡堵、丢心风险加剧,同时还存在钻杆强重比差、孔壁摩阻大、井底动力钻具输出扭矩不足、送钻精度低等诸多难题。本文系统综述了绳索取心技术的挑战、进展与趋势,剖析了深部极端工况下取心钻具、钻柱、动力钻具、垂钻系统、随钻测井系统及动态测试平台等方面的技术瓶颈,总结了国内外在这些领域的最新进展。结果表明,尽管各项关键技术已取得重要突破,但仍亟待解决材料在极端环境下的适应性、井下密封传动可靠性及智能测控协同等问题。未来需依托多学科交叉融合创新,重点攻关可耐受300℃、175 MPa工况的钻具材料,推进智能取心钻头、耐高温机械式垂钻与取心工艺的智能化融合,构建多场耦合动态测试与评价标准体系,实现从传统取心技术向智能绳索取心技术的战略升级,为万米级科学钻探提供坚实的技术保障。 展开更多
关键词 特深井 大陆科学钻探 绳索取心 钻柱系统 井底动力钻具 垂钻系统 随钻测井 动态测试平台
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深水复合隔水管-钻柱系统动态特性分析 认领 引用
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作者 杨文武 李洋 +3 位作者 谢议升 许胜显 徐正钰 陈龙 《船舶工程》 CSCD 北大核心 2026年第2期140-148,共9页
[目的]为揭示复杂环境载荷下复合隔水管-钻柱系统的耦合机理,[方法]针对现有动力学模型的不足,构建了多物理场耦合的非线性动力学模型。该模型综合考虑了涡激力、海流速度、顶张力、连接层刚度及钻井液流速等关键参数。[结果]研究结果表... [目的]为揭示复杂环境载荷下复合隔水管-钻柱系统的耦合机理,[方法]针对现有动力学模型的不足,构建了多物理场耦合的非线性动力学模型。该模型综合考虑了涡激力、海流速度、顶张力、连接层刚度及钻井液流速等关键参数。[结果]研究结果表明,在海流速度为0.4 m/s、张力为1.2 G、连接层刚度为10000 N/m、内钻井液流速为1 m/s的基本工况下,海流速度与顶张力的增大对复合隔水管-钻柱系统的动力学特征影响显著。海流速度增大时,复合管柱系统整体位移幅值增加,碰撞力幅值增大约35倍;连接层刚度与钻井液流速对复合管柱系统模态影响较小,但也会不同程度地影响复合管柱的运动特征,增加复合隔水管-钻柱系统失效风险。[结论]研究成果可为复合隔水管-钻柱系统的设计及安全使用提供参考。 展开更多
关键词 深水钻井 非线性动力学 管中管 复合隔水管-钻柱结构 接触碰撞
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基于Timoshenko理论的受压自旋钻柱系统振动特性研究 认领 引用
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作者 冯文杰 范谨铭 +1 位作者 李骁 李映辉 《力学季刊》 CAS CSCD 北大核心 2026年第2期308-321,共14页
钻井作业中,钻柱同时进行轴向与自旋运动,其运动轨迹复杂,易激发横向及耦合振动.这类振动会引起钻柱磨损和系统共振,进而增加钻井风险与作业成本.针对上述问题,本文对钻柱系统的振动特性进行了详细研究.基于Timoshenko梁理论建立了简支... 钻井作业中,钻柱同时进行轴向与自旋运动,其运动轨迹复杂,易激发横向及耦合振动.这类振动会引起钻柱磨损和系统共振,进而增加钻井风险与作业成本.针对上述问题,本文对钻柱系统的振动特性进行了详细研究.基于Timoshenko梁理论建立了简支边界条件下钻柱横向振动的运动方程;采用分离变量法与格林函数法求解所得微分方程,获得了钻柱系统频率方程的格林函数解及相应的模态函数.进一步对比分析了Timoshenko模型与Euler模型钻柱系统的动力学特性,并揭示了自旋速度、轴向速度和轴向载荷对系统固有频率的影响规律.研究结果表明,考虑转动惯量和剪切变形效应会降低钻柱系统的固有频率. 展开更多
关键词 钻柱系统 Timoshenko理论 横向振动 格林函数 模态响应
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Numerical Characterization of the Annular Flow Behavior and Pressure Loss in Deepwater Drilling Riser 认领 引用
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作者 Chengwen Liu Lin Zhu +2 位作者 Xingru Wu Jian Liang Zhaomin Li 《Computer Modeling in Engineering & Sciences》 SCIE EI 2020年第8期561-572,共12页
In drilling a deepwater well,the mud density window is narrow,which needs a precise pressure control to drill the well to its designed depth.Therefore,an accurate characterization of annular flow between the drilling ... In drilling a deepwater well,the mud density window is narrow,which needs a precise pressure control to drill the well to its designed depth.Therefore,an accurate characterization of annular flow between the drilling riser and drilling string is critical in well control and drilling safety.Many other factors influencing the change of drilling pressure that should be but have not been studied sufficiently.We used numerical method to simulate the process of drill string rotation and vibration in the riser to show that the rotation and transverse vibration of drill string can increase the axial velocity in the annulus,which results in the improvement of the flow field in the annulus,and the effect on pressure loss and its fluctuation amplitude.In addition,there are also multiple secondary flow vortices in the riser annulus under certain eccentricity conditions,which is different from the phenomenon in an ordinary wellbore.The findings of this research are critical in safely controlling well drilling operation in the deepwater environment. 展开更多
关键词 Deepwater drilling riser drill string movement pressure loss powerlaw fluid numerical simulation
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Exploration and determination of the principles of rotary-percussive underground slimhole drilling 认领 引用 被引量：1
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作者 Shadrina Anastasija Saruev Lev 《International Journal of Mining Science and Technology》 EI CAS 2014年第2期245-249,共5页
A possibility of the efficient use of rotary percussive drilling to provide drilling smaller diameter holes(40–70 mm) both in mining and prospecting is disclosed herein. A new construction designed for the nipple thr... A possibility of the efficient use of rotary percussive drilling to provide drilling smaller diameter holes(40–70 mm) both in mining and prospecting is disclosed herein. A new construction designed for the nipple thread connection is described. The relative amplitude variation, change of power pulse time and energy in their propagation throughout the drilling tool are determined. A possibility of the efficient power pulse transfer along the drill string to the rock destruction tools with new nipple connections which allow automating the make-up and breakout system of drill pipe was supported by experiments. 展开更多
关键词 Rotary-percussive drilling Smaller diameter holes Drill string Nipple thread connection Power pulse Percussive energy
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Improved Methods for Acoustic Transmission along the Drill String and Other Periodic Media 认领 引用
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作者 Cheng Li Tianhuai Ding 《稀有金属材料与工程》 SCIE EI CAS 北大核心 2006年第A3期495-498,共4页
Acoustic telemetry along the drill string helps to know the physical and chemical characteristics of the formation and drilling fluid.A time-domain algorithm is developed for the propagation of one-dimensional axial s... Acoustic telemetry along the drill string helps to know the physical and chemical characteristics of the formation and drilling fluid.A time-domain algorithm is developed for the propagation of one-dimensional axial stress waves with the inner and outer viscous fluid.The algorithm simulates the passbands,stopbands and spikes due to the presence of the discontinuous boundaries of drill string.Then the effects of transmitted pulses and transceivers on acoustic transmission are analysed.The simulated results show that the raised cosine pulses and optimal placements of transceivers improve system performance.Moreover,dual PZT receivers can exclude signals propagating in a direction opposite to the transmitted signals.It is obvious that the uses of the available modeling and signal processing techniques can make the drill string as a waveguide for transmitting information at high data rates. 展开更多
关键词 formation characteristics drill string acoustic telemetry well logging signal processing
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钻柱纵-扭耦合非线性振动试验与数值模拟研究 认领 引用 被引量：3
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作者 谢豆 伍沁瑶 +3 位作者 厍伦元 邹敏 万长成 李伟成 《机械工程学报》 EI CAS CSCD 北大核心 2025年第23期134-144,共11页
采用一种新型多功能实验钻机研究了钻柱纵-扭耦合非线性振动,该钻机具有多种配置方案,能够模拟所有重要的钻柱振动类型,包括黏滑、跳钻、涡动和螺旋屈曲。首先,开展了钻柱黏滑振动试验与参数研究,揭示了黏滑振动机理,以及钻柱纵向振动... 采用一种新型多功能实验钻机研究了钻柱纵-扭耦合非线性振动,该钻机具有多种配置方案,能够模拟所有重要的钻柱振动类型,包括黏滑、跳钻、涡动和螺旋屈曲。首先,开展了钻柱黏滑振动试验与参数研究,揭示了黏滑振动机理,以及钻柱纵向振动与扭转振动间的相互耦合,试验结果表明:提高驱动转速和降低有效钻压均有助于减轻钻柱的扭转振动,甚至消除黏滑现象。其次,开展了稳态钻进条件下钻头破岩试验研究,据此建立了钻头-岩石相互作用模型,并进行了特征参数识别。在此基础上,构建了考虑黏滑、跳钻和钻头破岩再生效应的钻柱纵-扭耦合振动集总参数模型,模型计算结果与试验测试结果的高度一致验证了该模型的正确性和有效性,并进一步开展了钻柱纵-扭耦合非线性振动的数值模拟研究。研究结果为优化钻柱结构及钻井参数,降低钻柱有害振动,提高钻井效率奠定了理论基础。 展开更多
关键词 钻柱系统 纵‐扭耦合振动 黏滑振动特性 钻头-岩石相互作用 集总参数模型
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基于AMESim和ADAMS钻井管柱液压举升装置联合仿真研究 认领 引用 被引量：1
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作者 宋炳豪 王旱祥 +3 位作者 张衡 刘延鑫 蔡文军 陈志礼 《石油机械》 北大核心 2025年第7期50-57,82,共8页
随着钻井工艺技术的不断发展,对钻具输送效率以及自动化程度要求越来越高,但在输送过程中钻具存在不可预知的滚动,故无法有效控制其运动轨迹,同时负载实时变化也无法保证液压缸的同步性,且单一仿真软件无法真实反映实际工况。为此,研发... 随着钻井工艺技术的不断发展,对钻具输送效率以及自动化程度要求越来越高,但在输送过程中钻具存在不可预知的滚动,故无法有效控制其运动轨迹,同时负载实时变化也无法保证液压缸的同步性,且单一仿真软件无法真实反映实际工况。为此,研发了一款新型夹持式的钻井管柱液压举升装置,可防止管柱在输送过程中的滚动。基于阀前补偿的负载敏感液压系统保证了各机构液压缸的同步性,实现了流量与负载压力大小无关的无级控制;基于AMESim和ADAMS搭建的联合仿真模型,模拟了该举升装置的真实运行状态。仿真结果表明:液压执行机构输出值较好地跟踪了目标期望值,最大相对误差不超过3.6%。研究结果可为管柱输送装置的研制与试验提供理论指导。 展开更多
关键词 钻井管柱 液压举升装置 PID位置反馈 负载敏感液压系统 机液联合仿真
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