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型号
外径mm
内径mm
接头螺纹BOX
下入套管/油管in
QM79
79 12 NC23
4
QM89
89 12 NC26
4 1/2
QM98
98 12 NC26
5
QM110
110 12 NC31
5 1/2
QM146
146 20 NC38
7
QM203
203 25 NC50
9 5/8
QM305
305 38 6 5/8REG
13 3/8
 TIANHE QM type Impression Block  is an effective tool used to determine the dimensions, configuration, condition, and location of the top end of a fish in the hole.
 Order instruction
1 Main body serial number and products code
2 Thread connection
3 OD of impression block
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Tianhe Oil Group Huifeng Petroleum Equipment CO. ltd.