Ultra-Seal R wellbore sealant from CSI Technologies is an alternative to Portland cement in a wide variety of wellbore conditions. While the natural density of the epoxy material is slightly

Ultra-Seal hardness can range from that of hard plastic to stiff rubber. (Photo courtesy of CSI Technologies LLC)
greater than water, it can be weighted with no effect on performance. Ultra-Seal R does not readily mix with water, nor is it affected by water contamination. The material set can be controlled from 40°F to 350°F (4°C to 176.6°C). Benefits as a wellbore sealant include improved strength, improved bond strength, non-shrinking and ability to invade permeable solids and harden.

The basic components are a resin and a hardener, although other materials are added to tailor properties and pump time as desired. There are also alternative hardeners available for different temperature ranges. Resin and hardener are mixed on the surface in conventional mixing equipment. Clean-up is with a minimal quantity of a methanol and water mixture. Ultra-Seal R can be batch- or continuously mixed. Ultra-Seal R components are liquid, allowing for more precise mixing than Portland cement.

The material can be weighted to fall though standing water in the well bore or lightened to float on top. Because there are no solids in the basic material, it can be squeezed into casing leaks or into formations. Ultra-Seal R can be used to create virtual well bores in which the resin penetrates into the formation to consolidate weak or damaged zones.

When set, the material is impervious to essentially all wellbore fluids and gases. It can be formulated to degrees of hardness ranging from that of hard plastic to stiff rubber. Ultra-Seal R is extremely ductile in its set phase; it deforms without fracturing when loads are applied and rebounds to its initial shape when loads are released. Ultra-Seal R is readily drillable and millable using conventional bits.

Comments