墨西哥湾安全钻井中处理失循环的指南

[中文适用范围]： 本公告确定了在等效循环密度（ECD）超过断裂梯度时安全应对漏失挑战应考虑的事项。它解决了API 65-2中未涉及的钻井余量和泥浆漏失情况下的钻井问题。当在表面或海底堆栈操作（不包括分流器操作）中遇到漏失时，提供了指导。这些实践可能适用于其他外大陆架（OCS）环境，如加利福尼亚和佛罗里达的近海。 [外文原描述]： This bulletin identifies items that should be considered to safely address lost circulation challenges when the equivalent circulating density (ECD) exceeds the fracture gradient. It addresses drilling margins and drilling ahead with mud losses, which are not addressed in API 65-2. It provides guidance when lost circulation is experienced with either surface or subsea stack operations (excluding diverter operations). These practices may apply to other Outer Continental Shelf (OCS) environments such as offshore California and Florida. Lost circulation during drilling operations, in the form of both seepage and fracture losses, is a common occurrence in the Gulf of Mexico and other OCS environments. Through extensive practical experience, operators and drilling contractors have learned that with proper information, planning and execution, lost circulation can be safely managed to allow well construction goals to be met. The methods used to repair or manage lost circulation are based on w