The Wel-lok M2M™ technology consists of utilizing a modified thermite chemical reaction heater to melt bismuth-based alloys downhole. The melted alloys have a viscosity similar to water, and a specific gravity 10 times that of water, allowing them to flow into the smallest areas of a wellbore without the need of any surface pumping equipment. As the alloys cool and solidify, they expand to provide a seamless gas tight seal that is non-corrosive and not affected by H2S or C02.
No mechanical parts
One trip operation
Differential pressure ratings up to 10,000 psi
Available in a range of sizes to suit API & non API tubing and casings
Temperature ranges up to 160 °C
Can be used even in damaged and corroded tubings and casings
Creates a gas tight barrier without the need to pump from surface
Non-corrosive and not affected by H2S or CO2
Can seal in cased or open hole
Millable to achieve a full bore
Non-porous and solidifies in minutes as opposed to cement and resins
The Wel-lok M2M Perf-lok™ was developed to isolate perforations in a cased hole completion for zonal isolation or well P&A. Unlike typical cement squeezes traditionally used for this purpose, the Perf-lok™ does not require squeezing as it is flows into the perforation tunnels by gravity due to its viscosity and density. Applying pressure to squeeze the cement can often cause the perforations to collapse and eliminate the ability to fill the entire void. If the Perf-lok™ can also be milled out inside the casing, maintaining a seal inside the perforations through its unique expansion properties.
|BiSN WEL-LOK M2M Perf-lokTM Current Qualified Tools|
|CASING SIZE||TOOL OD|
|* custom sizes available|