APPLICATION OF COILED TUBING UNIT AND ITS NECESSARY TOOLS IN OILFIELDS

The coiled tubing unit, which has unique structural design, can be used to many downhole conventional or special operations, in which there is no need to make up and break out tubing thread. Therefore, it has the advantages of safe and reliable operation and good economic benefits. This paper emphatically introduces applications of coiled tubing unit in production technologies such as washover, cement squeeze, gas lift, testing of deflecting well and horizontal well,as well as packer job, internal cutting and reaming. Furthermore, it gives an simple introduction to the necessary tools such as couple, on-off connector, wireline tool and releasing tool, and presents some suggestions for the application and popularization of coiled tubing unit in oil field.