For the abundant of noise in testing oil well depth with sound wave, it is difficult to locate the reflected sound wave.
在用声波测试油井油液面深时，反射声波受到大量杂波干扰，给接箍波和液面波的定位带来了极大的困难。
The oil well extended several hundreds of feet in depth.
油井向下延伸了数百英尺。
The depth of this oil well—5,000 feet (1,500 meters) below the ocean surface—has complicated all proposed mitigation efforts.
深入海面5000英尺（1500米）的油井使所有缓和污染的努力陷入困境。
The purpose of perforation is penetrating the casing tube, cement sheath and a certain depth of the formation and forming unhindered channels for oil and gas flowing into the well casing.
射孔目的就是射穿套管、水泥环和地层内一定的深度，为地层的油气流入至井筒，形成一个顺畅的通道。
The principle of depth survey system by photoelectric encoder for oil well logging, the systems composition and its specific hardware circuit are introduced.
介绍了石油测井深度光电编码器测量系统的测量原理、系统组成以及电路分析，同时在对系统误差分析的基础上给出了具体校正方法。
Our country is rich in depth oil and gas accumulation resources. It is difficult to drill the deep well and hard formation where the exploration and the development meets.
我国存在丰富的深层油气藏资源，勘探和开发所遇到的难题就是钻深井硬地层。
The depth checking method is combined with special depth checking apparatus, may achieve all depth checking datas by once drop of apparatus into oil well.
校深方法与专用校深仪器配合使用，能达到仪器一次下井就测全校深资料的目的。
The depth checking method is combined with special depth checking apparatus, may achieve all depth checking datas by once drop of apparatus into oil well.
校深方法与专用校深仪器配合使用，能达到仪器一次下井就测全校深资料的目的。
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