US 12,234,421 B2
Carbon dioxide recycle stream processing with ethylene glycol dehydrating in an enhanced oil recovery process
Eric Prim, Spring, TX (US); and Mark Mathias, The Woodlands, TX (US)
Assigned to Pilot Intellectual Property, LLC, Houston, TX (US)
Filed by Pilot Intellectual Property, LLC, Houston, TX (US)
Filed on Aug. 27, 2021, as Appl. No. 17/459,523.
Prior Publication US 2023/0072750 A1, Mar. 9, 2023
Int. Cl. C10L 3/10 (2006.01); B01D 3/14 (2006.01); B01D 17/02 (2006.01); B01D 53/00 (2006.01); B01D 53/26 (2006.01); C09K 8/594 (2006.01); E21B 43/16 (2006.01); E21B 43/40 (2006.01)
CPC C10L 3/104 (2013.01) [B01D 3/143 (2013.01); B01D 17/02 (2013.01); B01D 53/002 (2013.01); B01D 53/263 (2013.01); B01D 53/265 (2013.01); C09K 8/594 (2013.01); C10L 3/103 (2013.01); E21B 43/164 (2013.01); E21B 43/40 (2013.01); C10L 2290/543 (2013.01); C10L 2290/545 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A set of process equipment for use in an enhanced oil recovery process, comprising:
an ethylene glycol dehydrator configured to:
receive a first carbon dioxide recycle stream from a hydrocarbon formation, wherein the first carbon dioxide recycle stream comprises water, carbon dioxide, natural gas, and natural gas liquids;
add ethylene glycol to the first carbon dioxide recycle stream to produce an ethylene glycol and carbon dioxide recycle stream;
condense the ethylene glycol and carbon dioxide stream to produce a multiphase stream; and
separate the multiphase stream into a water and ethylene glycol stream and a second carbon dioxide recycle stream, wherein the water and ethylene glycol stream comprises the water and the ethylene glycol, and wherein the second carbon dioxide recycle stream comprises the carbon dioxide, the natural gas, and the natural gas liquids;
an ethylene glycol regeneration system configured to:
receive the water and ethylene glycol stream from the ethylene glycol dehydrator;
separate the water and ethylene glycol stream into a water stream and an ethylene glycol stream; and
transfer the ethylene glycol stream to the ethylene glycol dehydrator; and
a natural gas liquids recovery column configured to:
receive the second carbon dioxide recycle stream from the ethylene glycol dehydrator; and
separate the second carbon dioxide recycle stream steam into a carbon dioxide reinjection stream and a natural gas liquids stream.