plugs

This work chronicles a series of operational activities in hydrate-blockage detection, modeling assessment, and safe and successful plug-remediation efforts in a Norwegian gas condensate subsea asset.

Prior to proceeding with a contract to fulfil a rigless P&A campaign for Sasol in Mozambique, BiSN designed a field trial to prove the effectiveness of its bismuth plug technology. Although the technology had been used in 19 countries by BiSN for a variety of downhole applications, it had not yet been qualified for use in Mozambique.

A dissolvable collet field tested in an unconventional completion led to an average running time of 32 minutes per stage in a vertical section and 19 minutes per stage in the horizontal section.

Shale producers have learned in recent years that their fracture plugs may not be holding up as well as they thought. One of the first operators to realize the true scope of the issue is now sharing the pathway it took to solving it.

When a plug gets stuck in a well, consider the cause. Often stuck fracturing tools are a warning sign of casing trouble. Companies that have investigated plug problems have been surprised by the findings.

The shale sector is seeking answers to a complex issue involving casing deformations that block access to long sections of a lateral. As opposed to frac hits, this rising problem is considered to be an intrawell phenomena.

The most common method used for the placement of cement plugs is the balanced-plug method using drillpipe, tubing, or a combination of both.