几年前人们认为,在深度不大的水底打勘探钻孔的最好办法是在钻探船或不大的固定平台上进行。然而,使用这种设备的工作经验表明,设备有效使用的可能性在颇大程度上取决于天气、水面波浪强度以及涨潮和退潮。与全面钻进相比,经常提取岩心使设备的操 A few years ago it was thought that the best way to drill for exploration holes on a submarine bottom was to do it on a drilling vessel or a small fixed platform. However, the experience of working with such equipment shows that the possibility of effective use of the equipment depends to a large extent on weather, surface wave strength, and high and low tides. Compared with comprehensive drilling, the core is often extracted to make the equipment fucked