middle-long coring barrel 中长筒取芯
clay coring barrel 取粘土岩心管
lengthening coring barrel 加长岩心管
long barrel coring 长筒取心
medium barrel coring 中筒取心
When coring barrel gets stuck downhole, it is very easy to back off safety joint to trip out inner barrel and cores, and only left outer barrel for fishing operation.
当岩心筒在井下被卡住时，很容易地从安全接头螺纹处倒开，起出内筒和岩心，只留下外筒进行打捞。
Sealing coring tools mainly consists of external threaded adapter, balance piston, limit joint, inner and outer barrel, core catcher, locating pin, sealing head and coring bit.
密闭取心工具主要由外螺纹接头、平衡活塞、限位接头、内外筒、卡箍岩心爪、定位销、密封头、及取心钻头等部件组成。
The wire-line coring tool of HSQ serial has kept up the technical features of conventional placer drills and derived the advanced structure from steel cable fishing tool for inner barrel.
HSQ系列绳索取心钻具，既保持了现用砂钻钻进的工艺特点，又发挥了钢绳打捞内管技术的方便性。
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