Patents by Inventor Sunil Kokal

Sunil Kokal 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: 20200217767
    Abstract: Certain implementations of the subject matter can be implemented as a method of screening demulsifiers for live crude oil-water emulsions. A live emulsion of a hydrocarbon sample and a water sample is flowed through a capillary viscometer. The live emulsion includes dissolved gases retrieved from a hydrocarbon-carrying reservoir. While flowing the live emulsion through the capillary viscometer, a demulsifier sample is flowed through the capillary viscometer. The demulsifier sample causes breakdown of the live emulsion. Using the capillary viscometer, change in a viscosity of the live emulsion over time resulting from the breakdown of the live emulsion due to the demulsifier sample is measured. Multiple images of the breakdown of the live emulsion over time are captured. A strength of the live emulsion is classified based, in part, on the change in the viscosity of the live emulsion over time and on the plurality of images.
    Type: Application
    Filed: January 3, 2019
    Publication date: July 9, 2020
    Inventors: Sunil Kokal, Zuhair Al-Yousif, Modiu Sanni
  • Publication number: 20200217768
    Abstract: Certain implementations of the subject matter can be implemented to screen demulsifiers. A live emulsion of a live hydrocarbon sample and a water sample is flowed through a capillary viscometer. The live hydrocarbon sample includes dissolved gases retrieved from a hydrocarbon-carrying reservoir. While flowing the live emulsion through the capillary viscometer, a demulsifier sample is flowed through the capillary viscometer. The demulsifier sample is capable of causing breakdown of the live emulsion. Using the capillary viscometer, change in a viscosity of the live emulsion over time resulting from the breakdown of the live emulsion due to the demulsifier sample is measured. Multiple images of the breakdown of the live emulsion over time are captured. A strength of the live emulsion is classified based, in part, on the change in the viscosity of the live emulsion over time and on the plurality of images.
    Type: Application
    Filed: January 3, 2019
    Publication date: July 9, 2020
    Inventors: Sunil Kokal, Zuhair Al-Yousif
  • Patent number: 10669798
    Abstract: Provided are systems and methods for freeing differentially stuck pipe via the in-situ release of fluids from fluid-releasing tanks coupled to a centralizer or stabilizer of a pipe. Fluid-releasing tanks may be coupled to a centralizer or stabilizer of a pipe and located around the circumference of the pipe. Nozzles may be connected to the fluid-releasing tanks to enable the in-situ release of fluid from the fluid-releasing tanks. Various mechanisms may be used to open the nozzles and release the fluid from the fluid-releasing tanks.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: June 2, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Abdulaziz S. Al-Qasim, Mohammed Al-Arfaj, Sunil Kokal
  • Publication number: 20200056089
    Abstract: In one aspect, a complex emulsion includes an internal fluid-in-gas emulsion configured to increase a density and a viscosity of a gas in the internal fluid-in-gas emulsion emulsifying a fluid in the internal fluid-in-gas emulsion. The complex emulsion includes an external fluid emulsifying the internal fluid-in-gas emulsion, and the external fluid is configured to carry corrosion inhibitors into a subterranean zone. The complex emulsion includes hydrophobic particles encapsulating an outer surface of droplets of the fluid in the internal fluid-in-gas emulsion. A concentration of the hydrophobic particles is between about 0.1% and 0.5% by weight.
    Type: Application
    Filed: October 24, 2019
    Publication date: February 20, 2020
    Applicant: Saudi Arabian Oil Company
    Inventors: Fawaz M. Al-Otaibi, Sunil Kokal
  • Patent number: 10557326
    Abstract: Systems and methods for moving a tubular string within a subterranean well include a ring assembly. The ring assembly includes a structural ring sized with a ring inner diameter to circumscribe the tubular string and a ring outer diameter to fit within a bore of the subterranean well. A rotatable blade extends from the structural ring. Wheels are spaced around an inner diameter surface of the structural ring.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: February 11, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Abdulaziz S. Al-Qasim, Raed A. Alouhali, Sunil Kokal
  • Publication number: 20200003749
    Abstract: A dual core flooding apparatus is disclosed. The dual core flooding apparatus includes at least two core holders each configured to contain a core plug. The dual core flooding apparatus includes a fluids delivery system configured to inject one or more fluids into the core holders and core plugs. The dual core flooding apparatus includes an image capture system, a density and viscosity measurement system, and at least two oil/water separators. The dual core flooding apparatus also includes at least two back pressure regulators configured to maintain a pore pressure in the core plugs and an automated confining pressure system configured to maintain a confining pressure in each core holder. The dual core flooding apparatus further includes a data acquisition system, differential pressure measurement systems, and effluent measurement systems.
    Type: Application
    Filed: September 11, 2019
    Publication date: January 2, 2020
    Inventors: Fawaz Al-Otaibi, Xianmin Zhou, Ahmed A. Eidan, Sunil Kokal, Almohannad A. Alhashboul
  • Patent number: 10487260
    Abstract: In one aspect, a complex emulsion includes an internal fluid-in-gas emulsion configured to increase a density and a viscosity of a gas in the internal fluid-in-gas emulsion emulsifying a fluid in the internal fluid-in-gas emulsion. The complex emulsion includes an external fluid emulsifying the internal fluid-in-gas emulsion, and the external fluid is configured to carry corrosion inhibitors into a subterranean zone. The complex emulsion includes hydrophobic particles encapsulating an outer surface of droplets of the fluid in the internal fluid-in-gas emulsion. A concentration of the hydrophobic particles is between about 0.1% and 0.5% by weight.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: November 26, 2019
    Assignee: Saudi Arabian Oil Company
    Inventors: Fawaz M. Al-Otaibi, Sunil Kokal
  • Publication number: 20190352557
    Abstract: In one aspect, a secondary or tertiary hydrocarbon recovery method includes flowing a complex emulsion into a subterranean zone. The complex emulsion includes an internal fluid-in-gas emulsion configured to increase a density and a viscosity of a gas in the internal fluid-in-gas emulsion emulsifying a fluid in the internal fluid-in-gas emulsion. The complex emulsion includes an external fluid emulsifying the internal fluid-in-gas emulsion, and the external fluid is configured to carry corrosion inhibitors into the subterranean zone. The complex emulsion includes hydrophobic particles encapsulating an outer surface of droplets of the fluid in the internal fluid-in-gas emulsion. A concentration of the hydrophobic particles is between about 0.1% and 0.5% by weight.
    Type: Application
    Filed: July 31, 2019
    Publication date: November 21, 2019
    Applicant: Saudi Arabian Oil Company
    Inventors: Fawaz M. Al-Otaibi, Sunil Kokal
  • Publication number: 20190345374
    Abstract: This invention generally relates to the field of oil recovery from reservoirs. More specifically, it relates to the recovery of oil from sandstone and carbonate reservoirs using a process for preparing a dispersion of capsules for use downhole including the steps of providing capsules containing a dense liquid, each capsule having a capsule wall defining an inner area, the capsule wall having an outer side. The capsules are functionalized by adding a carbon dioxide-philic compound to the outer side of the capsule wall. A dispersion is then prepared by adding the functionalized capsules to supercritical carbon dioxide such that a stable dispersion of capsules in supercritical carbon dioxide is achieved.
    Type: Application
    Filed: July 22, 2019
    Publication date: November 14, 2019
    Applicant: Saudi Arabian Oil Company
    Inventors: Fawaz AL-OTAIBI, Sunil KOKAL, Howard SCHMIDT, Yun CHANG
  • Publication number: 20190323311
    Abstract: Provided are systems and methods for freeing differentially stuck pipe via the in-situ release of fluids from fluid-releasing tanks coupled to a centralizer or stabilizer of a pipe. Fluid-releasing tanks may be coupled to a centralizer or stabilizer of a pipe and located around the circumference of the pipe. Nozzles may be connected to the fluid-releasing tanks to enable the in-situ release of fluid from the fluid-releasing tanks. Various mechanisms may be used to open the nozzles and release the fluid from the fluid-releasing tanks.
    Type: Application
    Filed: April 24, 2018
    Publication date: October 24, 2019
    Inventors: Abdulaziz S. Al-Qasim, Mohammed Al-Arfaj, Sunil Kokal
  • Patent number: 10444218
    Abstract: A dual core flooding apparatus is disclosed. The dual core flooding apparatus includes at least two core holders each configured to contain a core plug. The dual core flooding apparatus includes a fluids delivery system configured to inject one or more fluids into the core holders and core plugs. The dual core flooding apparatus includes an image capture system, a density and viscosity measurement system, and at least two oil/water separators. The dual core flooding apparatus also includes at least two back pressure regulators configured to maintain a pore pressure in the core plugs and an automated confining pressure system configured to maintain a confining pressure in each core holder. The dual core flooding apparatus further includes a data acquisition system, differential pressure measurement systems, and effluent measurement systems.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: October 15, 2019
    Assignee: Saudi Arabian Oil Company
    Inventors: Fawaz Al-Otaibi, Xianmin Zhou, Ahmed A. Eidan, Sunil Kokal, Almohannad A. Alhashboul
  • Patent number: 10421895
    Abstract: In one aspect, a secondary or tertiary hydrocarbon recovery method includes flowing a complex emulsion into a subterranean zone. The complex emulsion includes an internal fluid-in-gas emulsion configured to increase a density and a viscosity of a gas in the internal fluid-in-gas emulsion emulsifying a fluid in the internal fluid-in-gas emulsion. The complex emulsion includes an external fluid emulsifying the internal fluid-in-gas emulsion, and the external fluid is configured to carry corrosion inhibitors into the subterranean zone. The complex emulsion includes hydrophobic particles encapsulating an outer surface of droplets of the fluid in the internal fluid-in-gas emulsion. A concentration of the hydrophobic particles is between about 0.1% and 0.5% by weight.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: September 24, 2019
    Assignee: Saudi Arabian Oil Company
    Inventors: Fawaz M. Al-Otaibi, Sunil Kokal
  • Patent number: 10400158
    Abstract: This invention generally relates to the field of oil recovery from reservoirs. More specifically, it relates to the recovery of oil from sandstone and carbonate reservoirs using a process for preparing a dispersion of capsules for use downhole including the steps of providing capsules containing a dense liquid, each capsule having a capsule wall defining an inner area, the capsule wall having an outer side. The capsules are functionalized by adding a carbon dioxide-philic compound to the outer side of the capsule wall. A dispersion is then prepared by adding the functionalized capsules to supercritical carbon dioxide such that a stable dispersion of capsules in supercritical carbon dioxide is achieved.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: September 3, 2019
    Assignee: SAUDI ARABIAN OIL COMPANY
    Inventors: Fawaz Al-Otaibi, Sunil Kokal, Howard Schmidt, Yun Chang
  • Publication number: 20190242199
    Abstract: Systems and methods for reducing friction between a casing string and a bore of a subterranean well when moving the casing string within the bore of a subterranean well include a roller bearing assembly. The roller bearing assembly has a bearing body and a plurality of spherical bearings spaced around an outer diameter of the bearing body. The bearing body is sized to be removably attached to an outer diameter of the casing string and to be stationary relative to the casing string.
    Type: Application
    Filed: February 5, 2018
    Publication date: August 8, 2019
    Applicant: Saudi Arabian Oil Company
    Inventors: Abdulaziz S. Al-Qasim, Mohammed K. Al-Arfaj, Mohammad Saud Al-Badran, Sunil Kokal
  • Publication number: 20190169950
    Abstract: Systems and methods for moving a tubular string within a subterranean well include a ring assembly. The ring assembly includes a structural ring sized with a ring inner diameter to circumscribe the tubular string and a ring outer diameter to fit within a bore of the subterranean well. A rotatable blade extends from the structural ring. Wheels are spaced around an inner diameter surface of the structural ring.
    Type: Application
    Filed: December 1, 2017
    Publication date: June 6, 2019
    Inventors: Abdulaziz S. Al-Qasim, Raed A. Alouhali, Sunil Kokal
  • Publication number: 20180305607
    Abstract: In one aspect, a complex emulsion includes an internal fluid-in-gas emulsion configured to increase a density and a viscosity of a gas in the internal fluid-in-gas emulsion emulsifying a fluid in the internal fluid-in-gas emulsion. The complex emulsion includes an external fluid emulsifying the internal fluid-in-gas emulsion, and the external fluid is configured to carry corrosion inhibitors into a subterranean zone. The complex emulsion includes hydrophobic particles encapsulating an outer surface of droplets of the fluid in the internal fluid-in-gas emulsion. A concentration of the hydrophobic particles is between about 0.1% and 0.5% by weight.
    Type: Application
    Filed: June 28, 2018
    Publication date: October 25, 2018
    Applicant: Saudi Arabian Oil Company
    Inventors: Fawaz M. Al-Otaibi, Sunil Kokal
  • Publication number: 20180305606
    Abstract: In one aspect, a secondary or tertiary hydrocarbon recovery method includes flowing a complex emulsion into a subterranean zone. The complex emulsion includes an internal fluid-in-gas emulsion configured to increase a density and a viscosity of a gas in the internal fluid-in-gas emulsion emulsifying a fluid in the internal fluid-in-gas emulsion. The complex emulsion includes an external fluid emulsifying the internal fluid-in-gas emulsion, and the external fluid is configured to carry corrosion inhibitors into the subterranean zone. The complex emulsion includes hydrophobic particles encapsulating an outer surface of droplets of the fluid in the internal fluid-in-gas emulsion. A concentration of the hydrophobic particles is between about 0.1% and 0.5% by weight.
    Type: Application
    Filed: June 28, 2018
    Publication date: October 25, 2018
    Applicant: Saudi Arabian Oil Company
    Inventors: Fawaz M. Al-Otaibi, Sunil Kokal
  • Publication number: 20180258341
    Abstract: This invention generally relates to the field of oil recovery from reservoirs. More specifically, it relates to the recovery of oil from sandstone and carbonate reservoirs using a process for preparing a dispersion of capsules for use downhole including the steps of providing capsules containing a dense liquid, each capsule having a capsule wall defining an inner area, the capsule wall having an outer side. The capsules are functionalized by adding a carbon dioxide-philic compound to the outer side of the capsule wall. A dispersion is then prepared by adding the functionalized capsules to supercritical carbon dioxide such that a stable dispersion of capsules in supercritical carbon dioxide is achieved.
    Type: Application
    Filed: May 11, 2018
    Publication date: September 13, 2018
    Applicant: Saudi Arabian Oil Company
    Inventors: Fawaz AL-OTAIBI, Sunil KOKAL, Howard SCHMIDT, Yun CHANG
  • Patent number: 10047275
    Abstract: In one aspect, a method of recovering hydrocarbons from a subterranean zone includes flowing carbon dioxide in a first state into the subterranean zone including hydrocarbons, wherein a density of the carbon dioxide in the first state is greater than a density of carbon dioxide in a gaseous state, and recovering at least a portion of the hydrocarbons in the subterranean zone in response to flowing carbon dioxide in the first state into the subterranean zone.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: August 14, 2018
    Assignee: Saudi Arabian Oil Company
    Inventors: Fawaz M. Al-Otaibi, Sunil Kokal
  • Patent number: 10047276
    Abstract: This invention generally relates to the field of oil recovery from reservoirs. More specifically, it relates to the recovery of oil from sandstone and carbonate reservoirs using a process for preparing a dispersion of capsules for use downhole including the steps of providing capsules containing a dense liquid, each capsule having a capsule wall defining an inner area, the capsule wall having an outer side. The capsules are functionalized by adding a carbon dioxide-philic compound to the outer side of the capsule wall. A dispersion is then prepared by adding the functionalized capsules to supercritical carbon dioxide such that a stable dispersion of capsules in supercritical carbon dioxide is achieved.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: August 14, 2018
    Assignee: Saudi Arabian Oil Company
    Inventors: Fawaz Al-Otaibi, Yun Chang, Sunil Kokal, Howard Schmidt