Drill pipe drilling depth measuring device and measuring method by using measuring device

• Main Authors: WANG ZHIDONG, ZHAO TONGYU, HE WEIXING, XIE YI, FAN YUNXING
• Format: Patent
• Language: English
• Published: 08.04.2015
• 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 invention provides a drill pipe drilling depth measuring device and a measuring method by using the measuring device. The drill pipe drilling depth measuring device comprises a measuring probe, wherein the measuring probe comprises a permanent magnet which is arranged on a standard drill pipe connected end to end in a non-contact sleeving manner, and also comprises a magnetic induction sensor which is arranged beside the permanent magnet and is used for outputting a corresponding signal when the drill pipe joint passes the permanent magnet. According to the measuring device, whether the joint of the standard pipe passes the measuring probe is judged through a detection signal output by the magnetic induction sensor, the labor intensity of workers can be effectively reduced, and the labor efficiency of the workers is improved. Meanwhile, the measuring probe is in non-contact fit with the moving standard drill pipe in the measuring method, so that a measuring result can be effectively prevented from being influenced by driving or pulling out the standard drill pipe.