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机械钻速、钻头进尺和每米钻探成本通常称之为是钻探工程的主要技术经济指标。这些技术经济指标均与选用的钻头、所用钻进规程参数和操作技术紧密相关。选用的钻头应与所钻地层的硬度、研磨性(可钻性)相适应。操作技术主要取决于司钻人员的技术、经验和水平。而钻进规程参数的选取和确定及其合理配合则是非常重要的一个因素,不可忽视。提出了临界钻进规程的概念。临界规程是一条红线,不可逾越,否则就会发生事故。正常钻进规程时,钻压和钻头转速应该合理配合,冲洗液量宜保证岩粉处于正常规程状态,以得到理想的钻探工程技术经济指标。建议根据功率表读数变化来调整钻压和钻头转速的合理配合,利用流量计监控孔底的冲洗液数量,严格控制临界规程的形成,把经验打钻和科学打钻结合起来。
ROP, bit footage, and drilling cost per meter are commonly referred to as the major technical and economic indicators of a drilling project. These technical and economic indicators are closely related to the drill bit used, the drilling procedure parameters and operating techniques used. The choice of the drill bit should be drilled with the formation of hardness, grinding (drillability) to adapt. Operational techniques depend primarily on the skill, experience and level of driller personnel. The selection and determination of drill parameters and their reasonable cooperation is a very important factor that can not be ignored. Put forward the concept of critical drilling regulations. Critical procedure is a red line, insurmountable, otherwise an accident will occur. Normal drilling rules, the bit weight and bit speed should be reasonable with the amount of flushing fluid should be to ensure that rock powder in the normal state of state, in order to get the ideal technical and economic indicators of drilling engineering. It is suggested to adjust the weight-on-bit and the rotation speed of drill bit according to the change of power meter reading, to use the flowmeter to monitor the amount of flushing liquid at the bottom of the hole, to strictly control the formation of critical procedures, and to combine experience drilling with scientific drilling.