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Linc Energy Reports Doubling of UCG Syngas Flow Rates From Gasifier Through Use of Coil Tubing Unit

Australia-based Linc Energy reports that it has more than doubled its underground coal gasification (UCG) Gasifier 4 flow rates with the workover processes it recently completed with its newly acquired coil tubing unit equipment.

A coil tubing unit is a specialized drilling and well intervention rig that reduces the need to continuously connect drill pipe as equipment is moved in and out of the well. A continuous pipe, as opposed to many individual pipes used on conventional drilling rigs, the coil tubing unit also creates a safer operating environment, Linc said.

This is the first time in the world that coil tubing unit equipment has intervened on a live and flowing UCG gasifier to enhance its pproductivity We’ve more than doubled syngas flow, whilst considerably improving its quality and composition...We know how to use coil tubing equipment, how to conduct UCG cavity workovers while the well is still live and flowing, and how to perform all of this safely.

—Peter Bond, Linc Energy CEO



People who believe that the limited amount of coal recoverable by conventional means will cause a near-term peak in CO2 emissions have another thing coming.


80+% of all coal is too deep to mine or too thin to make mining worth it. UGC tech especially with thin tube on coil rigs which can now reach depths of 3000 meters opens almost all of the unminable coal seams to gasification. In the USA alone there is over 1.6 Trillion tones of coal that is technically reachable with 3500 meter rigs this is enough for hundreds of years of use even at 100% of our annual 105 quad btu consumption rate. Using the industry standard of FT syn where 1.2 ton of coal equals 1bbl of oil equivalent in liquid form and .5 bbl in light hydrocarbon gases (C3-C5) that trillion in coal becomes a trillion barrel equivalent in liquid fuels.

A couple of companies are working on using UCG syngas to liquids and others are using fuel cells or turbines for UCG to electricity the given price per btu of cleaned syngas is in the 2-4 dollar range for MMBTU this is half of the well head price for natural gas and is on par with lignite on a MMBTU basis.

Deep coal seams are almost always topped with cap rocks, so if one desired to do so the burned out cavitys are perfect to store CO2 in a liquid state. If the coal gas (methane)+ CO2 did not leak out over millions of years the returned CO2 will not. to do UCG you have to first recover all the methane and CO2 in the formation and dewater it then send down your steam, h2 or o2 gas to begin the retort reactions.

With the right price this process could be carbon neutral by putting the co2 back underground and exporting the power via high voltage, the water byproducts once cleaned with RO would be potable and free to release into the watersheds a win-win for the dry high plains basins. The small amount of RO permeate would be disposed of how all saline permeates are deep injection right back to the UGC cavities.


Sounds too good to be true?

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