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- Keywords hole wall;dynamic pressure;manganin pressure resistance sensor; 岩石孔壁;动态压力;锰铜压阻传感器;
- The contact between drillstring and bore hole wall in the process of horizontal drilling is of large area and geometrically nonlinear. 长中半径水平井钻柱与井壁的接触问题是大面积接触的几何非线性问题。
- Dry and solidify the wet film , liquid light sensitive resistance welding, dry the net board and hole wall, etc. 湿膜、液态感光阻焊的干燥和固化；也可用于网版的干燥；板材和孔壁的干燥等等。
- "Is PTH and small via hole wall quality checked by cross-section and followed by a closed loop corrective action? 是否通过切片检验PTH与小导通孔孔壁状况，并有相应的改善对策跟踪？"
- The calculation and analysis of the damage failure of the plunger hole wall for the aeroplunger pump ZB-16D are presented. 对航空柱塞式液压泵ZB-16D的柱塞腔壁贯穿故障进行了结构和受力分析及计算。
- As a typical example, the contact-impact problem between the drillstring and the bore hole wall in oil field has been calculated and analysed. 文中针对石油工程中钻柱这类典型的细长杆与圆形井壁的接触碰撞问题进行了求解。
- Three spiraled ribs designed to minimize downhole torque, reduce damage to the hole wall and ensure maximum fluid circulation. 产品说明 ： 稳定器的三个螺旋叶片能有效地降低井下扭矩，减轻对井壁的损害并确定最大量的泥浆循环。
- Polymer anti-caving drilling fluid was used to deal with hole wall instability in constriction of directional geothermal well in Tianjin. 针对天津市地热定向井施工中存在的孔壁不稳的问题,经过摸索,采用聚合物防塌钻井液进行护壁堵漏,取得了良好的效果。
- The results show that the contact -impact problem between the slender rod and the wall of a round hole, such as the drillstring and the bore hole wall, can be solved better. 结果表明,动力间隙元能较好地解决细长杆(如钻柱)与圆孔孔壁(如井壁)的接触碰撞问题。
- The low pressure-sealing plug is installed by pressing the plug into a tapered hole. The surface hardened, but flexible plug achieves anchorage by gripping with the hole wall. 该系列为低压力密封堵头。安装时由工具压入锥形孔，软性堵头被压入孔壁表面。该系列有以下特点：
- The influence of stocking upon ground surrounding the borehole on the stability of hole wall and the influence of nearby foundation drilling on the building are also analyzed. 同时，文中分析了孔周地面堆载对孔壁稳定性的影响和临近基础钻孔对建筑物的影响。
- By analyzing the random contact and impact between drilling string and bore hole wall at arbitrary depth and circle direction in slim hole well, a dynamic model of whole drilling string is presented. 考虑小井眼细长钻柱沿井深和井眼圆周方向的随机接触碰撞，建立了钻柱瞬态动力学模型。
- Hammer products, electric drills, electric drills impact, planer, stone cutting machine, diamond saw blades, hole wall bi-metal hole for, carpentry openings for, carbide drill series. 产品有电锤、电钻、冲击电钻、电刨、石材切割机、金刚石锯片、墙璧开孔器、金属开孔器、木工开孔器、硬质合金钻头等系列。
- Keywords hole stabilization;mudstone;shale;critical point;time; 井眼稳定;泥岩;页岩;临界点;时间;
- Stability of hole wall and relations between well oblique of wellhole drilled and azimuth are important contents to design a correct safe density window of drilling fluid of oriented well. 研究定向井井壁稳定与井眼钻进的井斜和方位之间的关系是正确设计定向井钻井液安全密度窗口的重要内容。
- Keywords hole transpart material;styryl triarylamine;reduction; 空穴传输材料;苯乙烯基三芳胺;还原;
- According to the foundation project of Chongyang bridge,the stability of hole wall of pile to different soil layers was analyzed on the analysis of condition of hole wall stability,at . 结合重阳大桥钻孔灌注桩工程,在分析孔壁稳定条件的基础上,进行不同土层的钻孔孔壁稳定性分析,同时分析孔内泥浆的稳定护壁作用及功能,建立孔壁稳定性数学分析模型,提出相应的护壁措施,防止孔壁的坍塌。
- Top-base high-profile, Guaidan chaos of Health, there are holes wall, gatehouse, a side of Oasis, Bixi, Cai Qi, landscaped, Teana absolutely not. 顶垒高台，怪石乱生，洞前有面墙、门楼，侧有甘泉、碧溪、菜畦、花木，天籁不绝。
- Keywords hole polygonal double crystal arch combined searching unit; 孔洞;多角度双晶弧形组合探头;
- Keywords hole transport material;triaryl amine;oxadizole;synthesis;application; 空穴传输材料;三芳胺;恶二唑;合成;应用;
