1.中途裸眼测试口袋过长时:(1)对石炭岩地层,可利用选层锚支撑,用ＢＴ封隔器进行测试;(2)对砂泥岩地层,仍需采用井底支撑。但在选择井底支撑尾管时,可考虑用5″加重钻杆代替6″钻铤(或4″钻铤)。2.ＢＴ封隔器在煤层气井注入/压降试井中的改进应用:使用常规ＢＴ封隔器进行注入/ 1. When the naked eye test pocket is too long in the middle: (1) For the carboniferous formation, the anchor with the layer selection anchor can be used and tested with the BT packer; (2) For the sand-shale formation, the bottom hole support is still required. However, when selecting bottom hole support trunks, consider using a 5 “heavier drill pipe instead of a 6” drill collar (or a 4 "drill collar) .2 Improved application of a BT packer in injection / pressure well testing of a CBM well: Injection using a conventional BT packer /