Wells in Saudi Arabia, onshore and offshore, often require workover because of the highly corrosive environment to which the downhole equipment is subjected. During these operations, the downhole equipment often must be repaired or replaced. To maintain well control during these workovers, a single hole often is required to allow the kill fluids to be circulated. Traditionally, these holes have had to be made with explosives and a "Soft Shot" perforator or by mechanical hole-punching methods. Workover jobs that required a single hole to be punched were often economically compromised by the delays in mobilizing explosives and because failures to perforate "soft" tubing were common when using traditional mechanical hole-punching methods.

This paper presents several case histories in which a newly developed slickline-deployed, electro-mechanical tubing punch was used for the first time worldwide. Although the workover requirements in the wells differed and were in both onshore and offshore environments, all required a single hole to be punched. The method was 100% successful and solved the problems that had been experienced using conventional methods.

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