Bullet card assembly drags for lance structure

• Main Authors: WU SHUJUN, GU XIAOBIN, LU XUELIAN, HE HUILAN, YANG ZHENGYING, DING XIANGZHONG
• Format: Patent
• Language: English
• Published: 30.12.2015
• Subjects: 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

The utility model relates to a bullet card assembly drags for lance structure belongs to prospecting with creeping into equipment technical field. Technical scheme is: contain and drag for spearhead (1), rotation axis (2), locating piece (3), spring (4) and drag for lance seat (5), drag for spearhead (1) and articulate through rotation axis (2) with dragging for lance seat (5), dragging for and being equipped with spring installation hole (13) and locating piece mounting hole (12) in lance seat (5), locating piece mounting hole (12) are located spring installation hole (13) top, and establish in spring installation hole (13) spring (4), and establish in locating piece mounting hole (12) locating piece (3), locating piece up end (14) with drag for spearhead bottom surface (9) and contact for the plane. The beneficial effects of the utility model are that: drag for the spearhead and can keep good vertical state under the effect of spring, when dragging for the spearhead rotation, surface to surface contact becomes the contact of line face, and the rotation of spearhead is dragged for in very convenient realization.