Applying finite element method,the dynamic characteristics of drill string with cone bit in straight hole were simulated,and the whirl,deformation and the dynamic stress in air drilling were compared with the ones in drilling fluid drilling.
应用有限元方法,仿真了空气钻井时斜直井眼中带牙轮钻头钻柱的动力学特性,比较了空气钻井和钻井液钻井条件下钻柱的涡动、变形以及动态应力状况,探讨了空气钻井钻柱失效的动力学机理。
Design and lab evaluation of ideal packing bridging drilling and completion fluids;
理想充填暂堵型钻井完井液的设计及室内评价
Preparation of drilling and completion fluids used for preventing the formation from damage of the high-pressure and low-permeability sandstone reservoirs;
保护高压低渗致密油气藏的钻井完井液体系的配制与应用
Owing to the water phase trap damage caused by drilling and completion fluids invasion, the logging data do not reflect the real characteristic of gas reservoirs, which results in weak or no well log response and response and gas formation miss.
致密砂岩气层低孔低渗、低初始水饱和度和裂缝发育等特征使其极易受到钻井完井液损害。
660m depthdrilling shaft lining structure design and analysis of main shaft Ban Ji mine
板集主井660m深钻井井壁结构设计分析
Design Optimization of Drilled Shaft Lining Structure in 1000m Deep Shaft
千米深井钻井法凿井井壁结构设计优化
Structure analysis and design optimization of drilling shaft lining bottom in super-deep alluvium
特厚表土层钻井井壁底结构分析与设计优化
Nonlineaer Study on Dynamic Action of Integrated Drill String-Well Rock System;
钻柱结构与井壁岩石互作用下系统耦合非线性动力学研究
electrically driven rotary sidewall sampler
电动钻进式井壁取心器
Mechanical Mechanism and Design Theory of Shaft Lining Constructed in Subsidence Area;
塌陷区新型立井井壁结构与受力机理研究
Research and design of shaft lining structure in mining subsidence area
采空塌陷区立井井壁结构的研究与设计
Study on Vertical Structural Stability of a Super-deep Drilled Shaft in Slurry
泥浆中超深钻井井壁竖向稳定性分析
Structure characteristics of foreign cantilever beams of the jack-up drilling platform
国外自升式悬臂梁钻井平台结构特点
Structure security analysis of cuttings falling-prevention tool for gas drilling
气体钻井防沉屑工具结构安全性分析
To bore(a shaft) with a trepan.
钻用钻井机钻（矿井）
2.4 This is the hole geometry of this well.
这是这口井的井身结构。
Measurement to the Freezing shaft-line Stress of Yang Yin Mine
杨营矿主井冻结段外层井壁结构内外力监测分析
Design rig's mast structure& rig's substructure.
油井的钻机的井架，珩架及底座结构件的应力分析和设计。
Hole Stability and Drilling Fluid Optimization Technical Research for BZ13-1 Oilfield
渤中13-1油田井壁稳定与钻井液优化技术研究
A simple means for gas drilling wellbore stability analysis
一种气体钻井井壁稳定性分析的简易方法
Study on Borehole Sloughing and Drilling Fluid Technology for Drilling in Qian'an Area.
乾安地区井壁坍塌机理及钻井液技术研究
Interaction mechanisms of ultra-low permeable drilling fluid for stability of borehole wall
超低渗透钻井液稳定井壁的作用机理研究
