The purpose of cement bond log (CBL) under increasing borehole pressure is to differentiate micro annulus from bypass channel.
在井内加压下进行水泥胶结测井带压作业，其目的是将微环空与串槽区分开。
In view of the leakage of complex formations, in which the size and shape of leakage path change with the variation of borehole pressure, the concept of "Strong cohesiveness" is presented.
针对漏失通道的尺寸、形状随井内压力变化的复杂井漏，提出了“强粘接性”概念。
The technology of monitoring well bottom while drilling has high precision, which can control borehole pressure more precise, but also the scope of the pressure gradient is well established.
井下随钻流量监测技术具有很高的监测精度，能够对井眼压力进行更加精细的控制，还能够对压力梯度范围很好的确定。
The software RFPA is used to simulate the borehole burst, validate critical pressure, and research the stress drop and acoustic emission before and after occurring the burst in the borehole.
用RFPA软件对钻孔冲击进行了数值模拟，验证了钻孔冲击实验得出的临界压力，并研究了钻孔冲击前、后的应力降及声发射等特征。
Surge pressure is a major factor which affects borehole stability.
波动压力是影响井眼稳定的主要因素。
During the drilling procedure, the mud filtrates continuously penetrate into the formation because of the unbalance between the mud column pressure in the borehole and formation pressure.
在钻井过程中，井筒泥浆柱压力和地层压力的不平衡使得泥浆滤液不断渗入地层。
It showed that eccentric pressure is produced by eccentric decouple charge blasting on borehole wall.
实验结果表明，偏心不耦合装药在孔壁上形成明显的偏心应力场。
The relationship between pressure drop and flow rate doesn't obey Darcy's law around the borehole of horizontal Wells with high productivity.
在高产量水平井井眼附近，压降与流量的关系不符合达西定律。
The pressure loss in horizontal borehole may have certain influences on production performance of fractured horizontal wells.
水平井筒内的压力损失对压裂水平井的生产动态有一定的影响；
So in such a formation construction, it is important to use the technology of drilling mud back to tank to balance the pressure of the loose layer and prevent the borehole collapse.
所以在这种地层中施工，利用泥浆回灌钻孔技术有效地平衡松散层压力不使其垮塌尤为重要。
Using slope shoring method combined borehole pile and high pressure jet grouting pile and anchor is an important mean to protect the safety of the existing buildings around the foundation pit.
采用钻孔桩及高压旋喷桩与锚索相结合的边坡支护方法，是保护基坑周边已有建筑物安全的一种重要手段。
Experimental results indicated that direct measurement of explosion pressure on the wall of a borehole by manganese-copper sensor is feasible.
试验结果表明，用锰铜压阻传感器测试炮孔孔壁压力是可行的。
By using the surge pressure calculating method, in this paper the formulas have been derived which are used to calculate the maximum allowable velocity in pulling and running pipe in borehole.
本文根据波动压力计算方法推导出了最大许用起钻速度和下钻速度的计算公式。
Wellsite calibration, temperature and pressure correction must be made while the sensor is used in the borehole.
这种机电一体化的流体密度传感器在井下应用时必须进行井场刻度以及温度和压力的校正。
Correctly recognizing the differential pressure sticking is of great significance to reduce complex accidents of borehole, increase drilling speed and reduce the drilling cost.
正确认识压差卡钻，对于减少井下复杂事故，提高钻井速度，降低钻井成本具有十分重要的意义。
Sequentially, the effective radius of gas extraction and the effective pressure-released radius of pressure-released borehole are calculated by the borehole destroying radius expressions.
所得出的钻孔破坏半径的表达式可用于不同条件下计算瓦斯排放钻孔的有效排放半径和卸压钻孔的有效卸压半径。
More CO2 content, slow drop on borehole temperature and fast drop on the pressure.
CO2含量越高，温度下降越慢，而压力下降越快；
Based upon blasting mechanics theory, pressure on the wall of borehole and blast stress field are gained in the course of detonation with air cushion charging construction.
利用爆炸力学理论，得到空气垫层装药爆破的孔壁压力及其爆炸应力场。
The research into explosion pressure on the wall of a borehole occupied a very important place in the study work about the mechanism of rock fragmentation by blasting.
炮孔孔壁压力问题在爆破机理研究中占有极其重要的地位和作用。
The peak pressure attenuation of shock in water in borehole axis direction was slower than the direction vertical to the borehole axis.
水中冲击波压力峰值在炮孔轴线上衰减比垂直于炮孔轴线向上衰减慢。
The negative pressure for under balanced perforating is a key parameter in well perforating design. It can directly influence the productivity and borehole stability of a perforated well.
负压射孔技术的关键参数之一就是负压差的大小，它直接影响油井射孔完成后的产能以及孔眼的稳定性。
The negative pressure for under balanced perforating is a key parameter in well perforating design. It can directly influence the productivity and borehole stability of a perforated well.
负压射孔技术的关键参数之一就是负压差的大小，它直接影响油井射孔完成后的产能以及孔眼的稳定性。
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