Patents by Inventor Ananda K. Nagavarapu

Ananda K. Nagavarapu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10393015
    Abstract: Methods and systems for treating a compressed gas stream. The compressed gas stream is cooled and liquids are removed therefrom to form a dry gas stream, which is chilled in a first heat exchanger. Liquids are separated therefrom, thereby producing a cold vapor stream and a liquids stream. A first part of the cold vapor stream is expanded to produce a cold two-phase fluid stream, and a second part of the cold vapor stream is cooled to form a cooled reflux stream. Various streams are fed into a separation column to produce a cold fuel gas stream and a low temperature liquids stream. The second part of the cold vapor stream is cooled by the cold fuel gas stream, which becomes a warmed fuel gas stream that is compressed and used with the low-temperature liquids stream to chill the dry gas stream and to cool the compressed gas stream.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: August 27, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Ananda K. Nagavarapu, Donald J. Victory, Robert D. Denton
  • Patent number: 10328382
    Abstract: Provided are apparatus and systems for testing the performance a swing adsorption process. This test system is integrated with an operational system that processes a feed stream to form a product stream. The test system includes a test swing adsorption system configured to perform a swing adsorption process on the test feed stream that is based on two or more streams from different locations in the operational system. Then, passing the streams from different steps to different locations in the operational system to be recycled into the operational system.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: June 25, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: William Barnes, Ananda K. Nagavarapu
  • Patent number: 10322365
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to remove contaminants, such as water, from the stream. As part of the process, the adsorbent bed unit may include additional space for the valves on the head of the adsorbent bed unit.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: June 18, 2019
    Assignee: ExxonMobil Upstream Reseach Company
    Inventors: Tracy A. Fowler, Shwetha Ramkumar, Jeffrey W. Frederick, Ananda K. Nagavarapu, Sebastian Chialvo, Robert F. Tammera, John W. Fulton
  • Patent number: 10293298
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to treat the pipeline quality natural gas to form a stream that complies with liquefied natural gas (LNG) specifications. The process may involve a combined TSA and PSA process, which is utilized to remove contaminants from the feed stream.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: May 21, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Bennett D. Marshall, Bruce T. Kelley, Ananda K. Nagavarapu, Harry W. Deckman, Robert A. Johnson, Shwetha Ramkumar, Russell H. Oelfke
  • Patent number: 10220345
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to remove contaminants, such as water, from the stream. As part of the process, the adsorbent bed unit is purged with a purge stream that is provided from the overhead of the demethanizer. The configuration integrates a RCTSA dehydration system with a cryogenic recovery system.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: March 5, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Ananda K. Nagavarapu, Bennett D. Marshall
  • Patent number: 10124286
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to remove contaminants, such as water, from the stream. As part of the process, the adsorbent bed unit is purged with a purge stream that is provided from the overhead of the demethanizer. The configuration integrates a PPSA dehydration system with a cryogenic recovery system.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: November 13, 2018
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Patrick D. J. McMahon, Robert A. Johnson, Shwetha Ramkumar, Russell H. Oelfke, Eugene R. Thomas, Ananda K. Nagavarapu, William Barnes
  • Patent number: 10080992
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to treat the feed stream to form a stream that complies with nitrogen rejection specifications. The process may involve using at least a portion of the nitrogen rejection process product streams as a purge for the swing adsorption process.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: September 25, 2018
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Ananda K. Nagavarapu, Ransdall K. Smith, Russell H. Oelfke
  • Patent number: 10040022
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to remove contaminants, such as water, from the stream. As part of the process, the adsorbent bed unit may include additional space for the valves of the adsorbent bed unit.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: August 7, 2018
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Tracy A. Fowler, Shwetha Ramkumar, Jeffrey W. Frederick, Ananda K. Nagavarapu, Sebastian Chialvo, Robert F. Tammera, John W. Fulton
  • Publication number: 20180085705
    Abstract: Provided are apparatus and systems for testing the performance a swing adsorption process. This test system is integrated with an operational system that processes a feed stream to form a product stream. The test system includes a test swing adsorption system configured to perform a swing adsorption process on the test feed stream that is based on two or more streams from different locations in the operational system. Then, passing the streams from different steps to different locations in the operational system to be recycled into the operational system.
    Type: Application
    Filed: August 22, 2017
    Publication date: March 29, 2018
    Inventors: William Barnes, Ananda K. Nagavarapu
  • Publication number: 20180056229
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing an input feed stream through two swing adsorption systems as a purge stream to remove contaminants, such as water, from the respective adsorbent bed units. The wet purge product stream is passed to a solvent based gas treating system, which forms a wet hydrocarbon rich stream and a wet acid gas stream. Then, the wet hydrocarbon rich stream and the wet acid gas stream are passed through one of the respective swing adsorption systems to remove some of the moisture from the respective wet streams.
    Type: Application
    Filed: August 7, 2017
    Publication date: March 1, 2018
    Inventors: Robert D. Denton, Ananda K. Nagavarapu, Bruce T. Kelley, Robert A. Johnson, Bennett D. Marshall
  • Publication number: 20180016977
    Abstract: Methods and systems for treating a compressed gas stream. The compressed gas stream is cooled and liquids are removed therefrom to form a dry gas stream, which is chilled in a first heat exchanger. Liquids are separated therefrom, thereby producing a cold vapor stream and a liquids stream. A first part of the cold vapor stream is expanded to produce a cold two-phase fluid stream, and a second part of the cold vapor stream is cooled to form a cooled reflux stream. Various streams are fed into a separation column to produce a cold fuel gas stream and a low temperature liquids stream. The second part of the cold vapor stream is cooled by the cold fuel gas stream, which becomes a warmed fuel gas stream that is compressed and used with the low-temperature liquids stream to chill the dry gas stream and to cool the compressed gas stream.
    Type: Application
    Filed: May 5, 2017
    Publication date: January 18, 2018
    Inventors: Ananda K. Nagavarapu, Donald J. Victory, Robert D. Denton
  • Publication number: 20170370640
    Abstract: A system for conditioning a sour gas feed stream for a cryogenic distillation tower, comprising a dehydration unit configured to separate the sour gas feed stream into a first stream comprising water and a feed stream, and a sequential cooling assembly coupled to both the dehydration unit and the cryogenic distillation tower, wherein the sequential cooling assembly comprises a first stage configured to separate the feed stream into a partially cooled feed stream and a second stream comprising acid gas, a second stage configured to cool the partially cooled feed stream into a cooled feed stream and a third stream comprising acid gas, and a cooled feed stream header coupled to a cryogenic distillation tower feed inlet, wherein the first stage, the second stage, or both are configured to send at least one of the second and third streams to a bottom section of the cryogenic distillation tower.
    Type: Application
    Filed: January 13, 2016
    Publication date: December 28, 2017
    Inventors: Ananda K. Nagavarapu, P. Scott Northrop, Robert D. Denton, Jaime A. Valencia
  • Patent number: 9823017
    Abstract: A method and system of controlling a temperature within a melt tray assembly of a distillation tower. The method may include determining a melt tray fluid composition of a melt tray fluid, determining a melt tray fluid temperature of the melt tray fluid, determining if the melt tray fluid temperature is within an expected melt tray fluid temperature range for the melt tray fluid composition, decreasing the melt tray fluid temperature if the melt tray fluid temperature is greater than an expected melt tray fluid temperature range upper limit, increasing the melt tray fluid temperature if the melt tray fluid temperature is less than an expected melt tray fluid temperature range lower limit, and maintaining the melt tray fluid temperature if the melt tray fluid temperature is within the expected melt tray fluid temperature range.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: November 21, 2017
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Robert D. Denton, P. Scott Northrop, Ananda K. Nagavarapu
  • Publication number: 20170266604
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to remove contaminants, such as water, from the stream. As part of the process, the adsorbent bed unit may provide access to the adsorbent material within the adsorbent bed unit without having to remove one or more of valves, conduits and manifolds.
    Type: Application
    Filed: March 6, 2017
    Publication date: September 21, 2017
    Inventors: Robert F. Tammera, Bruce T. Kelley, Sebastian Chialvo, Ananda K. Nagavarapu, William Barnes, Tracy A. Fowler
  • Publication number: 20170113175
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to remove contaminants, such as water, from the stream. As part of the process, the adsorbent bed unit may include additional space for the valves on the head of the adsorbent bed unit.
    Type: Application
    Filed: October 4, 2016
    Publication date: April 27, 2017
    Inventors: Tracy A. Fowler, Shwetha Ramkumar, Jeffrey W. Frederick, Ananda K. Nagavarapu, Sebastian Chialvo, Robert F. Tammera, John W. Fulton
  • Publication number: 20170113176
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to remove contaminants, such as water, from the stream. As part of the process, the adsorbent bed unit may include additional space for the valves of the adsorbent bed unit.
    Type: Application
    Filed: October 4, 2016
    Publication date: April 27, 2017
    Inventors: Tracy A. Fowler, Shwetha Ramkumar, Jeffrey W. Frederick, Ananda K. Nagavarapu, Sebastian Chialvo, Robert F. Tammera, John W. Fulton
  • Publication number: 20170056815
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to treat the feed stream to form a stream that complies with nitrogen rejection specifications. The process may involve using at least a portion of the nitrogen rejection process product streams as a purge for the swing adsorption process.
    Type: Application
    Filed: August 10, 2016
    Publication date: March 2, 2017
    Inventors: Ananda K. Nagavarapu, Ransdall K. Smith, Russell H. Oelfke
  • Publication number: 20170056814
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to treat the pipeline quality natural gas to form a stream that complies with liquefied natural gas (LNG) specifications. The process may involve a combined TSA and PSA process, which is utilized to remove contaminants from the feed stream.
    Type: Application
    Filed: August 10, 2016
    Publication date: March 2, 2017
    Inventors: Bennett D. Marshall, Bruce T. Kelley, Ananda K. Nagavarapu, Harry W. Deckman, Robert A. Johnson, Shwetha Ramkumar, Russell H. Oelfke
  • Publication number: 20170056813
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to remove contaminants, such as water, from the stream. As part of the process, the adsorbent bed unit is purged with a purge stream that is provided from the overhead of the demethanizer. The configuration integrates a PPSA dehydration system with a cryogenic recovery system.
    Type: Application
    Filed: August 10, 2016
    Publication date: March 2, 2017
    Inventors: Patrick D.J. McMahon, Robert A. Johnson, Shwetha Ramkumar, Russell H. Oelfke, Eugene R. Thomas, Ananda K. Nagavarapu, William Barnes
  • Publication number: 20170056811
    Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to remove contaminants, such as water, from the stream. As part of the process, the adsorbent bed unit is purged with a purge stream that is provided from the overhead of the demethanizer. The configuration integrates a RCTSA dehydration system with a cryogenic recovery system.
    Type: Application
    Filed: August 10, 2016
    Publication date: March 2, 2017
    Inventors: Ananda K. Nagavarapu, Bennett D. Marshall