HeBei Solidkey Petroleum Machinery Co., Ltd.
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- Solidkey - Model 5 1/2 Inches IADC637G ...
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- RPM(r/min): 80~40
- WOB(KN): 69~167
Formations: Hard formation with high compressive strength, such as hard shale, sandstone, dolomite, hard gypsum, chert, granite,etc.
Popular size in drilling pilot hole for HDD application, the thread connection is customized for fitting with mud motor.

