冻结孔间距,是冻结法凿井设计中的重要参数之一,合理的冻结孔间距除了必须满足技术上的要求保证形成冻结壁外;还须考虑到使每米井筒的打钻和冻结成本最低,施工期限最短。 在冻结孔布置直径一定的条件下,缩短冻结孔间距对形成可靠的冻结壁是有利的;但由于孔距缩短,孔数相应地增加,从而增加打钻和冻结器的费用,在另一方面孔距缩短,相应地将缩短积极冻冻结时间,降低了冻结费用。因而经济而合理的冻结孔间距应根据上述有关因素分析决定。合理的冻结孔间距,是时间和冻结凿井各项技术操作水平的函数,随着冻结 Freezing hole spacing is one of the most important parameters in freezing sinking design. Reasonable spacing of frozen holes in addition to meeting the technical requirements to ensure the formation of a frozen wall; the minimum drilling and freezing costs per meter of wellbore must also be taken into account , The shortest construction period. Shortening the spacing of the frozen holes is advantageous for forming a reliable frozen wall with a fixed diameter of the frozen holes; however, the number of holes is correspondingly increased due to the shortened hole pitch, increasing the cost of drilling and freezing, on the other hand Pitch shortened accordingly will shorten the active freezing time, reducing the freezing costs. Therefore, economic and reasonable freezing hole spacing should be based on the above-mentioned factors analysis and decision. Reasonable spacing of frozen holes is a function of time and the level of technical operation of the freezing sinking well, with the freezing