Non-standard 187.33mm NC53 drilling tool nipple

• Main Authors: LU SHUANLU, WANG YALAN, KANG YANJUN, LU QIANG, LUO FAQIAN
• Format: Patent
• Language: Chinese; English
• Published: 21.07.2010
• 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 discloses a non-standard 187.33mm NC53 drilling tool nipple, wherein one end of a drilling tool pipe body is processed with an external thread joint and the other end thereof is processed with an internal thread joint matched with the external thread joint; the dimensions of the external thread joint and the internal thread joint of the drilling tool pipe body are NC53; the parameters of the external thread joint and the internal thread joint of the drilling tool pipe body are as follows: the thread form is V-0.038R, the screw pitch is four threads every 25.4mm, the taper is 1:6, the base surface pitch diameter C is 136.525mm, the major diameter DL of the big end of the external thread is 141.803mm, the cylindrical diameter DLF of the external thread joint is 138.90mm, the major diameter DS of the small end of the external thread is 121.696mm, the length LPC of the external thread joint is 120.65mm, the minimum length LBT of the internal thread is 123.83mm, the depth LBC of the internal thre