Processing of super-heavy oil coagulation in wellbore

In the development of super-heavy oil reservoir, it is very important to prevent coagulation in wellbore. Heavy oil often coagulates and blocks wellbore, and even high pressure fails to go through. In the previous workover treatment, some problems existed, such as the difficult return of heavy oil, the block of circulation system, the abnormal recovery of heavy oil feeding, the dilute oil high consumption, difficult construction, long cycle, high labor intensity and high cost. According to the special well conditions of ultra-deep and super-heavy oil, the buckle with coiled tubing cutting technology, the drilling and grinding technology and the ground device improvement technology have been applied in the Tahe Oilfield, making the prevent of super-heavy oil coagulation more efficient.