When penetrating into the low pressuredzone, 2% of SLD-1 plugging agent is added to prevent leakage, and 2% of XC-1 and XC-2, 3% of YL-180 are used to plug the formation fractures, 3% of MHR-86 lubricant is also used.

• 进入低压带后加入2%25SLD-1随钻堵漏剂；防止渗漏；加入2%25的 XC-1和XC-2.；3%25的YL-180封堵地层孔隙；并加入3%25MHR-86润滑剂;