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.
This Wel-lok M2M™ application was the first use of this new technology. It was developed to overcome the shortcomings of traditional methods of bridge plugs using cement. It quickly became apparent that this innovative technology is superior to the standard methods both when compared by speed and cost. It can be run on a wire line or a slick line and can pass through small restrictions such as damaged or crushed casing, yet still set the gas tight plug due to the larger drift than conventional bridge plugs.
In an effort to increase the expansion ratio beyond even that of the original TS without compromising pressure differential and gas tight sealing capabilities, BiSN developed the Wel-lok M2M MXD™ tool. The use of a bailer to carry the bismuth based alloy downhole in shot form allows for a smaller diameter tool to be run in hole while increasing the expansion ratio of the tool up to 3 times the tool OD.
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
Available in a range of sizes to suit API & non API tubings
Can be used even in damaged or corroded casing
Retrievable without milling
Non-corrosive and not affected by H2S or CO2
Reduced corporate liability
Reduced intervention costs
Reduced environmental impact
Larger expansion than traditional plugs
Temperature ranges up to 160 °C
The Wel-lok M2M TS™ (Tubing Seal) was developed to overcome the shortcomings of traditional methods, using bridge plugs and cement during well abandonment. It is typically run on electric line but can be deployed on a slick line or coil tubing as well. It can pass through small restrictions such as damaged or crushed tubing, yet still create the gas tight seal. It has a higher expansion ratio than conventional plugs, higher pressure ratings than inflatable packers and gas blocking abilities that cement cannot match.
|BiSN WEL-LOK M2M TSTM STANDARD DIMENSIONS|
|CASING/TUBING SIZE||TOOL OD|
|4 1/2" - 5”||3.5||8||180|
|7” - 7 5/8"||5.75||9.5||610|
|* custom sizes available|