Updates

Case Study

95/8” Rubblizer™ AchievesLongest Interval at 1,017ft

Deep Casing Tools Rubblizer™ technology was deployed by our operating partner, Tasman Oil Tools – a leader in Downhole Drilling Rental Tools in Australia and New Zealand, where it assisted in the recovery of a 9⅝”” top section casing. The tools longest interval to date at 1,017 ft, it was used to make two passes from 508 ft BRT back up to 39 ft BRT, with a third pass operating the tool across the remaining 12 Casing Connectio

The Challenge

Within the onshore Australian Coal Seam Gas market, a client experienced issues with sustained annulus casing pressure. The recovery of a section of 9⅝” casing was required, this was cemented in place from a depth of 155 m back to surface.

The Solution

Following the stabilisation of the annulus pressure the client required the assistance of an innovative technology that would successfully recover the top section of 9⅝” casing. The Rubblizer™ was recommended as a sound solution, due to the likelihood that the section of casing requiring recovery was cemented in place.

The Result

After a series of cuts were performed on the 9⅝” casing, it was recovered to surface. The Rubblizer™ was used to make 2x passes from 508 ft BRT back up to 39 ft BRT, with a third pass operating the tool across the remaining 12 Casing Connections. In total, a length of approximately 1,017 ft was achieved, the longest interval the Rubblizer™ has been operated across to date. A Senior Drilling Engineer from the end user commented: “The Rubblizer™ operation was a success and all indications were that the casing was free. We would not hesitate to use the tool again”.