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.
For wells with integrity issues, such as holes or leaking connections, BiSN has developed the Wel-lok M2M CLS (Casing Leak Seal). This tool can be run as a single seal to isolate a small leak or as a straddle assembly to isolate larger intervals. The through bore allows for continued production and wireline runs or it can be milled out to achieve a full drift without compromising the integrity of the gas tight seal.
Creates a metal to metal seal without using elastomers
Ready for pressure testing in one hour
V0 ISO 14310 tested
No mechanical parts
One trip operation
Differential pressure ratings up to 10,000 psi
Can be used even in damaged and corroded tubings and casings
Larger through bore than standard packoffs
Higher pressure ratings than standard expandable patches
Non-corrosive and not affected by H2S or CO2
Millable to achieve a full bore
Available in a range of sizes to suit API & non API tubing and casings
Temperature ranges up to 160 °C
The Wel-lok M2M CLS™ (Casing Leak Seal) was developed to address the shortcomings of traditional methods in sealing leaks in tubings and casings. This tool provides a V0 rated seal with higher pressure ratings than conventional casing patches with a larger through bore than traditional packoffs. If full bore access is required, it can be milled out leaving a seal only across the leaking area of the well.
|BiSN WEL-LOK M2M CLSTM STANDARD DIMENSIONS|
|CASING/TUBING SIZE||TOOL OD|
|DRIFT ID IF NOT
|4 1/2" - 5”||3.5||8||2.5|
|7” - 7 5/8"||5.75||9.5||4.5|
|* custom sizes available|
You can view or download a PDF data sheet of all our other tools by clicking the links below.