Patents by Inventor Dong-kyu Cha

Dong-kyu Cha 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).

  • Publication number: 20210270714
    Abstract: A system to measure a streaming potential of a core plug includes a measurement cell having a chamber to hold the core plug and an inlet fluid line connected to an inlet port of the measurement cell. A filtration device is arranged to control a salinity and ionic strength of a liquid medium received in the chamber through the inlet fluid line. The filtration device has membrane filters with different ion rejection rates and is controllable to selectively dispose each of the membrane filters in the inlet fluid line.
    Type: Application
    Filed: February 28, 2020
    Publication date: September 2, 2021
    Applicant: SAUDI ARABIAN OIL COMPANY
    Inventors: Dong Kyu Cha, Subhash C. Ayirala, Ali Abdullah Al-Yousef
  • Publication number: 20210247661
    Abstract: A pressure cell for sum frequency generation spectroscopy includes: a metal pressure chamber; a heating stage that heats the liquid sample; a pump, connected to an interior of the metal pressure chamber, that pressurizes the interior of the metal pressure chamber; and a controller that controls the pump and the heating stage to control a pressure of the interior of the metal pressure chamber and a temperature of a liquid sample. The metal pressure chamber includes: a base that retains the liquid sample; a removable lid that seals against the base to enclose the liquid sample in the metal pressure chamber; and a window in the removable lid that exposes the liquid sample to an exterior of the metal pressure chamber.
    Type: Application
    Filed: February 11, 2020
    Publication date: August 12, 2021
    Applicant: SAUDI ARABIAN OIL COMPANY
    Inventors: Dong Kyu Cha, Mohammed Badri Al-Otaibi, Salah Hamad Al-Saleh, Ali Abdallah Al-Yousef
  • Publication number: 20210247374
    Abstract: A pressure cell for sum frequency generation spectroscopy includes: a metal pressure chamber; a heating stage that heats a liquid sample; an ultrasonic stage that emulsifies the liquid sample; a chamber pump that pressurizes an interior of the metal pressure chamber; and a controller that controls the chamber pump, the ultrasonic stage, and the heating stage to control a pressure of the interior of the metal pressure chamber, an emulsification of the liquid sample, and a temperature of the liquid sample, respectively. The metal pressure chamber includes: a liquid sample holder that retains the liquid sample; a removable lid that seals against a base; a window in the removable lid; a sample inlet that flows the liquid sample from an exterior of the metal pressure chamber to the liquid sample holder at a predetermined flow rate; and a sample outlet.
    Type: Application
    Filed: February 11, 2020
    Publication date: August 12, 2021
    Applicant: SAUDI ARABIAN OIL COMPANY
    Inventors: Salah Hamad Al-Saleh, Dong Kyu Cha, Ali Abdallah Al-Yousef
  • Publication number: 20210215658
    Abstract: A method of making a portion of a microfluidic channel includes lithographically patterning a first pattern into a first layer of photoresist disposed on a substrate, the first pattern representative of morphology of a reservoir rock; etching the first pattern into the substrate to form a patterned substrate; disposing a second layer of photoresist onto the patterned substrate; lithographically patterning a second pattern into the second layer of photoresist to reveal portions of the patterned substrate; and depositing calcite onto the exposed portions of the patterned substrate.
    Type: Application
    Filed: January 14, 2020
    Publication date: July 15, 2021
    Applicant: Saudi Arabian Oil Company
    Inventors: Dong Kyu CHA, Ahmed GMIRA, Mohammed Badri AlOtaibi, Ali Abdallah AL-YOUSEF
  • Publication number: 20210162352
    Abstract: A method for fabricating calcite channels in a nanofluidic device is described. A porous membrane is attached to a substrate. Calcite is deposited in porous openings in the porous membrane attached to the substrate. A width of openings in the deposited calcite is in a range from 50 to 100 nanometers (nm). The porous membrane is etched to remove the porous membrane from the substrate to form a fabricated calcite channel structure. Each channel has a width in the range from 50 to 100 nm.
    Type: Application
    Filed: January 22, 2021
    Publication date: June 3, 2021
    Applicant: Saudi Arabian Oil Company
    Inventors: Dong Kyu Cha, Mohammed Badri AlOtaibi, Sultan Muhammad Al Enezi, Ali Abdallah Al-Yousef
  • Patent number: 10983439
    Abstract: A method for fabricating calcite channels in a nanofluidic device is described. A photoresist is coated on a substrate, and a portion of the photoresist is then exposed to a beam of electrons in a channel pattern. The exposed portion of the photoresist is developed to form a channel pattern, and calcite is deposited in the channel pattern using a calcite precursor gas. The deposited calcite includes at least one side having a length in a range of approximately 50 to 100 nanometers. The photoresist remaining after developing the exposed portion of the photoresist is removed.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: April 20, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Dong Kyu Cha, Mohammed Al Otaibi, Ali Abdallah Al-Yousef
  • Patent number: 10948429
    Abstract: A process for the preparation and imaging of a sample of rock from an oil and gas reservoir is provided. A sample of reservoir rock may be obtained, such as from a core sample obtained using a core sampling tool inserted in a wellbore extending into an oil and gas reservoir. A photoresist may be deposited on the surface of reservoir rock sample to form a homogenous layer. The photoresist-coated surface of the reservoir rock sample may be imaged using a focused ion beam (FIB). The photoresist protects the pores and other surface features of the rock from damage or implantation by the FIB ion beam and thus minimizes the curtain effect in the resulting images.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: March 16, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Dong kyu Cha, Sultan Enezi, Mohammed Al Otaibi, Ali Abdallah Al-Yousef
  • Patent number: 10926227
    Abstract: A method for fabricating calcite channels in a nanofluidic device is described. A porous membrane is attached to a substrate. Calcite is deposited in porous openings in the porous membrane attached to the substrate. A width of openings in the deposited calcite is in a range from 50 to 100 nanometers (nm). The porous membrane is etched to remove the porous membrane from the substrate to form a fabricated calcite channel structure. Each channel has a width in the range from 50 to 100 nm.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: February 23, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Dong Kyu Cha, Mohammed Badri AlOtaibi, Sultan Muhammad Al Enezi, Ali Abdallah Al-Yousef
  • Publication number: 20200301282
    Abstract: A method for fabricating calcite channels in a nanofluidic device is described. A photoresist layer is coated onto a top surface of a silicon nitride (SiN) substrate. After coating the photoresist layer, the photoresist layer is scanned with an electron beam in a predefined pattern. The scanned photoresist is developed to expose portions of the top surface of the SiN substrate in the predefined pattern. Calcite is deposited in the predefined pattern using atomic layer deposition (ALD) using a calcite precursor gas. Using a solvent, a remaining portion of the photoresist layer is removed to expose the deposited calcite in the predefined pattern and on the top surface of the SiN substrate, where a width of the deposited calcite is in range from 50 to 100 nanometers (nm).
    Type: Application
    Filed: June 11, 2020
    Publication date: September 24, 2020
    Applicant: Saudi Arabian Oil Company
    Inventors: Dong Kyu Cha, Mohammed Badri AlOtaibi, Ali Abdallah Al-Yousef
  • Patent number: 10761428
    Abstract: A method for fabricating calcite channels in a nanofluidic device is described. A photoresist layer is coated onto a top surface of a silicon nitride (SiN) substrate. After coating the photoresist layer, the photoresist layer is scanned with an electron beam in a predefined pattern. The scanned photoresist is developed to expose portions of the top surface of the SiN substrate in the predefined pattern. Calcite is deposited in the predefined pattern using atomic layer deposition (ALD) using a calcite precursor gas. Using a solvent, a remaining portion of the photoresist layer is removed to expose the deposited calcite in the predefined pattern and on the top surface of the SiN substrate, where a width of the deposited calcite is in range from 50 to 100 nanometers (nm).
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: September 1, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Dong Kyu Cha, Mohammed Badri AlOtaibi, Ali Abdallah Al-Yousef
  • Publication number: 20200171492
    Abstract: A method for fabricating calcite channels in a nanofluidic device is described. A porous membrane is attached to a substrate. Calcite is deposited in porous openings in the porous membrane attached to the substrate. A width of openings in the deposited calcite is in a range from 50 to 100 nanometers (nm). The porous membrane is etched to remove the porous membrane from the substrate to form a fabricated calcite channel structure. Each channel has a width in the range from 50 to 100 nm.
    Type: Application
    Filed: December 3, 2018
    Publication date: June 4, 2020
    Applicant: Saudi Arabian Oil Company
    Inventors: Dong Kyu Cha, Mohammed Badri AlOtaibi, Sultan Muhammad Al Enezi, Ali Abdallah Al-Yousef
  • Publication number: 20200071824
    Abstract: A method for fabricating calcite channels in a nanofluidic device is described. A photoresist layer is coated onto a top surface of a silicon nitride (SiN) substrate. After coating the photoresist layer, the photoresist layer is scanned with an electron beam in a predefined pattern. The scanned photoresist is developed to expose portions of the top surface of the SiN substrate in the predefined pattern. Calcite is deposited in the predefined pattern using atomic layer deposition (ALD) using a calcite precursor gas. Using a solvent, a remaining portion of the photoresist layer is removed to expose the deposited calcite in the predefined pattern and on the top surface of the SiN substrate, where a width of the deposited calcite is in range from 50 to 100 nanometers (nm).
    Type: Application
    Filed: August 28, 2018
    Publication date: March 5, 2020
    Applicant: Saudi Arabian Oil Company
    Inventors: Dong Kyu Cha, Mohammed Badri AlOtaibi, Ali Abdallah Al-Yousef
  • Publication number: 20190367801
    Abstract: A composition for increased hydrocarbon production from a hydrocarbon-bearing reservoir. The composition includes a saltwater solution suitable for injection into the hydrocarbon-bearing reservoir for water flooding, the saltwater solution having a salinity; and a plurality of nanocapsules, where the nanocapsules are operable to be suspended amongst the saltwater solution, where the nanocapsules have an overall positively charged outer surface at respective outer shells of the nanocapsules, where the nanocapsules encapsulate water molecules within the nanocapsules, and where the nanocapsules are operable to release the water molecules in the hydrocarbon-bearing reservoir proximate overall negatively charged zones.
    Type: Application
    Filed: May 28, 2019
    Publication date: December 5, 2019
    Applicant: Saudi Arabian Oil Company
    Inventors: Mohammed Badri Al-Otaibi, Dong Kyu Cha, Ali Abdallah Al-Yousef
  • Publication number: 20190250514
    Abstract: A method for fabricating calcite channels in a nanofluidic device is described. A photoresist is coated on a substrate, and a portion of the photoresist is then exposed to a beam of electrons in a channel pattern. The exposed portion of the photoresist is developed to form a channel pattern, and calcite is deposited in the channel pattern using a calcite precursor gas. The deposited calcite includes at least one side having a length in a range of approximately 50 to 100 nanometers. The photoresist remaining after developing the exposed portion of the photoresist is removed.
    Type: Application
    Filed: April 25, 2019
    Publication date: August 15, 2019
    Applicant: Saudi Arabian Oil Company
    Inventors: Dong Kyu Cha, Mohammed Al Otaibi, Ali Abdallah Al-Yousef
  • Publication number: 20190234889
    Abstract: A process for the preparation and imaging of a sample of rock from an oil and gas reservoir is provided. A sample of reservoir rock may be obtained, such as from a core sample obtained using a core sampling tool inserted in a wellbore extending into an oil and gas reservoir. A photoresist may be deposited on the surface of reservoir rock sample to form a homogenous layer. The photoresist-coated surface of the reservoir rock sample may be imaged using a focused ion beam (FIB). The photoresist protects the pores and other surface features of the rock from damage or implantation by the FIB ion beam and thus minimizes the curtain effect in the resulting images.
    Type: Application
    Filed: April 3, 2019
    Publication date: August 1, 2019
    Inventors: Dong kyu Cha, Sultan Enezi, Mohammed Al Otaibi, Ali Abdallah Al-Yousef
  • Patent number: 10365564
    Abstract: A method for fabricating calcite channels in a nanofluidic device is described. A photoresist is coated on a substrate, and a portion of the photoresist is then exposed to a beam of electrons in a channel pattern. The exposed portion of the photoresist is developed to form a channel pattern, and calcite is deposited in the channel pattern using a calcite precursor gas. The deposited calcite includes at least one side having a length in a range of approximately 50 to 100 nanometers. The photoresist remaining after developing the exposed portion of the photoresist is removed.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: July 30, 2019
    Assignee: Saudi Arabian Oil Company
    Inventors: Dong Kyu Cha, Mohammed Al Otaibi, Ali Abdallah Al-Yousef
  • Patent number: 10324049
    Abstract: A process for the preparation and imaging of a sample of rock from an oil and gas reservoir is provided. A sample of reservoir rock may be obtained, such as from a core sample obtained using a core sampling tool inserted in a wellbore extending into an oil and gas reservoir. A photoresist may be deposited on the surface of reservoir rock sample to form a homogenous layer. The photoresist-coated surface of the reservoir rock sample may be imaged using a focused ion beam (FIB). The photoresist protects the pores and other surface features of the rock from damage or implantation by the FIB ion beam and thus minimizes the curtain effect in the resulting images.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: June 18, 2019
    Assignee: Saudi Arabian Oil Company
    Inventors: Dong kyu Cha, Sultan Enezi, Mohammed Al Otaibi, Ali Abdallah Al-Yousef
  • Publication number: 20190049847
    Abstract: A method for fabricating calcite channels in a nanofluidic device is described. A photoresist is coated on a substrate, and a portion of the photoresist is then exposed to a beam of electrons in a channel pattern. The exposed portion of the photoresist is developed to form a channel pattern, and calcite is deposited in the channel pattern using a calcite precursor gas. The deposited calcite includes at least one side having a length in a range of approximately 50 to 100 nanometers. The photoresist remaining after developing the exposed portion of the photoresist is removed.
    Type: Application
    Filed: August 9, 2017
    Publication date: February 14, 2019
    Inventors: Dong Kyu Cha, Mohammed Al Otaibi, Ali Abdallah Al-Yousef
  • Publication number: 20180231477
    Abstract: A process for the preparation and imaging of a sample of rock from an oil and gas reservoir is provided. A sample of reservoir rock may be obtained, such as from a core sample obtained using a core sampling tool inserted in a wellbore extending into an oil and gas reservoir. A photoresist may be deposited on the surface of reservoir rock sample to form a homogenous layer. The photoresist-coated surface of the reservoir rock sample may be imaged using a focused ion beam (FIB). The photoresist protects the pores and other surface features of the rock from damage or implantation by the FIB ion beam and thus minimizes the curtain effect in the resulting images.
    Type: Application
    Filed: August 24, 2017
    Publication date: August 16, 2018
    Inventors: Dong kyu Cha, Sultan Enezi, Mohammed Al Otaibi, Ali Abdallah Al-Yousef
  • Patent number: 8520113
    Abstract: Provided are a digital photographing apparatus capable of taking a self-shot, a method of controlling the same, and a recording medium storing a program to execute the method. A digital photographing apparatus includes a shooting unit, configured to generate a live image of a subject; a main display unit, configured to display the generated image; an auxiliary display unit mounted on a front of the digital photographing apparatus and configured to display the generated image; a determination unit configured to determine whether the auxiliary display unit is switched on or off; and a self-shot setting unit configured to set a self-shot mode when the auxiliary display unit is switched from an ‘off’ state to an ‘on’ state.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: August 27, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hye-jin Kim, Jun-ho Choi, Dong-kyu Cha