COILED TUBING COUNTER

摘要

A tubing counter for counting coiled tubing inserted into a well includ es an outer housing having a through passage for receiving the tailed tubing therethrough. In some embodiments, pressure rated connectors at both of the ends of the outer housing sealably connect the outer housing in series between th e coiled tubing injector head and the outer casing of the well, A plurality of counti ng wheels are rotatably supported within the outer housing for rolling engagement alon g coiled tubing inserted through the outer housing while a counting mechanism records a number of rotations of each counting wheel independently of the other wheels to minimize counting errors. Locating the counter below the injector head arid below the tubing stripper ensures that the tubing is cleaner and less likely to slip i n contact with the counting wheels while also accounting far stretching of the tubing for more accurate measurement.