Decontaminating device with staggered and annular scraping blades for inner wall of drill pipe

• Main Authors: CHEN XIAOGANG, PANG JIN, CHEN GUIPING, LI DUNNAN
• Format: Patent
• Language: Chinese; English
• Published: 23.11.2016
• 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 invention discloses a decontaminating device with staggered and annular scraping blades for the inner wall of a drill pipe. The decontaminating device with the staggered and annular scrapping blades for the inner wall of the drill pipe is characterized in that scraping blade groups are formed by the scrapping blades which are equidistantly distributed around a core tube in a circumferential direction; the scraping blade groups have a quantity of at least two layers and are distributed up and down along the axis direction of the core tube; the scraping blades of the adjacent scraping blade groups are distributed in a staggered manner; in a side view, main bodies of the scraping blades are O-shaped; two sides of each O-shaped main body are connected with wing plates respectively; the wing plates are gradually downwards inclined from interior to exterior; the scraping blades are connected with the outer wall of the core tube through supporting arms; in a top view, inner edges and outer edges of the scraping