pressure hole

Based on careful analysis, it is considered that the root causing the complex accident is the pressure difference between the balance pressure needed and the actual water static pressure down hole.

本文通过分析得出，造成大26井井壁坍塌及其后的井下复杂情况的根本原因是起钻所需平衡压力与实钻井底水静压力之间存在压差。

Strength Design and Test Research of the Lug flange of Man-Hole in Pressure Vessel's Cylinder

压力容器筒体人孔凸缘法兰的强度设计与试验研究

This paper introduces the design method of the tool, to ensure the tool must be convex prism intersected between the adjacent segments by segmental machining the long tapered hole with small aperture and big depth bearing super high pressure.

介绍对承受超高压小孔径大深度长锥孔进行分段加工，保证相邻段必须是凸棱状相交的刀具设计方法。

It analyzes the concrete reason that the hole-digging grouting pile's roughness has an influence to carrying capacity, summarizes the constructive measures that accrete hole wall roughness. Introduces the concrete construction technique of pressure grouting, and propounds the calculation formula of carrying capacity.

分析了钻孔灌注桩的孔壁粗糙度对其承载力产生影响的具体原因，并总结了一些增大孔壁粗糙度的施工措施，介绍了压力灌浆的具体施工工艺，并提出承载力计算公式。

The practice proved that the technology can reduce flowing bottom hole pressure, minish interlayer interference under reasonable injecting-producing pressure system.

实践证明，在合理的注采压力系统下，潜油电泵可以应用于低渗透油田。

An experimental study on pressure loss in annular of a slim hole was con-ducted with a test rack of annular in slim hole in laboratory.

在室内小井眼环空实验架上对小井眼环空压力损失进行了试验研究。

In the case of a bottom-hole sample it is necessary to raise the temperature and pressure of the field sample to reservoir conditions.

如果是井底取样，有必要将样本的温、压恢复到油藏条件。

Using a diamond drill instead of the test hole to examine volume unit weight and to inspect pressure water testing for impermeability and quality.

应用金刚石钻机代替挖试坑法检测砌体容重及定期进行压水试验以检查、控制砌体透水率的质量控制方法。

Development and Test of IYC-50 Hydraulic Pressure Hole Forming Tree Planter

1YC&50液压植树成穴机的研制与试验

The results of some test measurement data indicate that it is feasible and provides a new and practicable method for long distance and big dimension hole-drilling to leak pressure and prevent rockburst.

通过多次试验数据表明，该方法是可行的，并为长距离、大孔径钻孔卸压防冲研究提出了一个新的可行的科学方法。

To obtain formation pressure data, formation pressure test by cable measures formation pressure of reservoir directly in open hole.

电缆地层压力测试是在裸眼井中直接测量储集层的地层压力，以获取地层压力资料。