Modular sleeve scraper's supplementary scraper mechanism

The utility model provides a modular sleeve scraper's supplementary scraper mechanism, including the arc positioning groove of setting on the sleeve pipe body, every arc positioning groove's both ends are fixed along being connected through first spring and the protruding of upright foot s...

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Bibliographische Detailangaben
1. Verfasser:	BIAN DINGWANG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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