Seal Perforations in Cased Hole Completions

When operators have open perforations that need to be isolated, either to produce from another zone or during well abandonment operations, squeezing cement or resin is a common method. However, if the formation is too tight to inject, wellbore temperatures are high, there is a large void behind the casing or they are working in a remote location where mobilizing a rig or coil tubing unit is not possible, this method cannot be utilized.

wel-lok™ offers the ability to isolate perforations when squeezing is not possible. Due to its low viscosity and high density, no pumping or injection rate is required and its nature allows the alloy to bridge off in a voided annulus, leaving a solid plug in the perforation tunnels for full isolation.

If access below the “squeezed” perforations is required, the wel-lok™ plug is easily milled and full bore ID of the casing can be achieved without compromising the integrity of the plug.