Safety anti-deviation drilling tool with half-piece type centralizers

• Main Authors: FU JIHAO, ZHANG LONGLONG, XUE JIBIAO, LIU DENGBING, ZHANG WEI, LEI HUACAI, LI SHANGHUA
• Format: Patent
• Language: Chinese; English
• Published: 22.06.2011
• 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 the technical field of well drilling tools, in particular to a safety anti-deviation drilling tool with half-piece type centralizers. The safety anti-deviation drilling tool comprises a drill bit, a lower half-piece type centralizer, an elbow connector, a lower drill collar, an upper half-piece type centralizer and an upper drill collar, wherein the drill bit, the lower half-piece type centralizer, the elbow connector, the lower drill collar, the upper half-piece type centralizer and not less than one upper drill collar are fixedly installed together sequentially from bottom to top, and an MWD (measurement while drilling) wireless inclinometer while drilling is fixedly installed in the upper drill collar. The safety anti-deviation drilling tool has a reasonable and compact structure, and is convenient to use; owing to the combined use of the drilling tool, the safety anti-deviation drilling tool achieves the safety and anti-deviation purpose; moreover, the mechanical drilling spee