Patents by Inventor Rajendra A. Kalgaonkar

Rajendra A. Kalgaonkar 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: 11753574
    Abstract: A downhole system includes a packer sealing an annular space around a downhole tubing and an insulating packer fluid positioned within the annular space and adjacent to the packer. The insulating packer fluid includes a sodium bicarbonate activator and an acidic nanosilica dispersion having silica nanoparticles and a stabilizer, wherein the pH of the acidic nanosilica dispersion ranges from 2 to 5, and the silica nanoparticles form at least 20 percent by weight of the acidic nanosilica dispersion.
    Type: Grant
    Filed: July 30, 2021
    Date of Patent: September 12, 2023
    Assignee: SAUDI ARABIAN OIL COMPANY
    Inventors: Vikrant Wagle, Rajendra Kalgaonkar, Abdullah S. Al-Yami
  • Publication number: 20230035211
    Abstract: A downhole system includes a packer sealing an annular space around a downhole tubing and an insulating packer fluid positioned within the annular space and adjacent to the packer. The insulating packer fluid includes a sodium bicarbonate activator and an acidic nanosilica dispersion having silica nanoparticles and a stabilizer, wherein the pH of the acidic nanosilica dispersion ranges from 2 to 5, and the silica nanoparticles form at least 20 percent by weight of the acidic nanosilica dispersion.
    Type: Application
    Filed: July 30, 2021
    Publication date: February 2, 2023
    Applicant: SAUDI ARABIAN OIL COMPANY
    Inventors: Vikrant Wagle, Rajendra Kalgaonkar, Abdullah S. Al-Yami
  • Patent number: 11352546
    Abstract: A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion and an ester activator. The alkaline nanosilica dispersion and the ester activator may form a gelled solid after interaction over a contact period. Methods of lost circulation control using the LCM are also provided.
    Type: Grant
    Filed: August 20, 2020
    Date of Patent: June 7, 2022
    Assignee: Saudi Arabian Oil Company
    Inventors: Vikrant Wagle, Rajendra Kalgaonkar, Abdullah Al-Yami, Zainab Alsaihati
  • Patent number: 11149181
    Abstract: A convertible composition comprising a nanosilica drilling fluid, the nanosilica drilling fluid comprising an aqueous based drilling mud, where the aqueous based drilling mud comprises water, and an alkaline nanosilica dispersion, where the alkaline nanosilica dispersion comprises nanosilica; and a chemical activator, the chemical activator operable to hydrolyze in the presence of water to produce an acid, where a weight ratio of the alkaline nanosilica dispersion to the chemical activator is between 1 to 0.001 and 1 to 0.25.
    Type: Grant
    Filed: September 15, 2020
    Date of Patent: October 19, 2021
    Assignee: SAUDI ARABIAN OIL COMPANY
    Inventors: Vikrant Wagle, Abdullah Al-Yami, Rajendra A. Kalgaonkar, Zainab Alsaihati
  • Patent number: 11015102
    Abstract: A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion, a polyester activator, and a formaldehyde resin. The alkaline nanosilica dispersion and the polyester activator may form a gelled solid after interaction over a contact period, such that the gelled solid incorporates the formaldehyde resin. Methods of lost circulation control using the LCM are also provided.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: May 25, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Vikrant Wagle, Rajendra Kalgaonkar, Abdullah Al-Yami, Zainab Alsaihati
  • Patent number: 10961430
    Abstract: A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion and a polyester activator. The alkaline nanosilica dispersion and the polyester activator may form a gelled solid after interaction over a contact period. Methods of lost circulation control using the LCM are also provided.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: March 30, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Vikrant Wagle, Rajendra Kalgaonkar, Abdullah Al-Yami, Zainab Alsaihati
  • Publication number: 20200407620
    Abstract: A convertible composition comprising a nanosilica drilling fluid, the nanosilica drilling fluid comprising an aqueous based drilling mud, where the aqueous based drilling mud comprises water, and an alkaline nanosilica dispersion, where the alkaline nanosilica dispersion comprises nanosilica; and a chemical activator, the chemical activator operable to hydrolyze in the presence of water to produce an acid, where a weight ratio of the alkaline nanosilica dispersion to the chemical activator is between 1 to 0.001 and 1 to 0.25.
    Type: Application
    Filed: September 15, 2020
    Publication date: December 31, 2020
    Applicant: Saudi Arabian Oil Company
    Inventors: Vikrant Wagle, Abdullah Al-Yami, Rajendra A. Kalgaonkar, Zainab Alsaihati
  • Publication number: 20200377782
    Abstract: A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion and an ester activator. The alkaline nanosilica dispersion and the ester activator may form a gelled solid after interaction over a contact period. Methods of lost circulation control using the LCM are also provided.
    Type: Application
    Filed: August 20, 2020
    Publication date: December 3, 2020
    Inventors: Vikrant Wagle, Rajendra Kalgaonkar, Abdullah Al-Yami, Zainab Alsaihati
  • Patent number: 10851279
    Abstract: A convertible composition comprising a nanosilica drilling fluid, the nanosilica drilling fluid comprising an aqueous based drilling mud, where the aqueous based drilling mud comprises water, and an alkaline nanosilica dispersion, where the alkaline nanosilica dispersion comprises nanosilica; and a chemical activator, the chemical activator operable to hydrolyze in the presence of water to produce an acid, where a weight ratio of the alkaline nanosilica dispersion to the chemical activator is between 1 to 0.001 and 1 to 0.25.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: December 1, 2020
    Inventors: Vikrant Wagle, Abdullah Al-Yami, Rajendra A. Kalgaonkar, Zainab Alsaihati
  • Patent number: 10759986
    Abstract: A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion and an ester activator. The alkaline nanosilica dispersion and the ester activator may form a gelled solid after interaction over a contact period. Methods of lost circulation control using the LCM are also provided.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: September 1, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Vikrant Wagle, Rajendra Kalgaonkar, Abdullah Al-Yami, Zainab Alsaihati
  • Publication number: 20200208037
    Abstract: A convertible composition comprising a nanosilica drilling fluid, the nanosilica drilling fluid comprising an aqueous based drilling mud, where the aqueous based drilling mud comprises water, and an alkaline nanosilica dispersion, where the alkaline nanosilica dispersion comprises nanosilica; and a chemical activator, the chemical activator operable to hydrolyze in the presence of water to produce an acid, where a weight ratio of the alkaline nanosilica dispersion to the chemical activator is between 1 to 0.001 and 1 to 0.25.
    Type: Application
    Filed: March 6, 2020
    Publication date: July 2, 2020
    Inventors: Vikrant Wagle, Abdullah Al-Yami, Rajendra A. Kalgaonkar, Zainab Alsaihati
  • Publication number: 20190276724
    Abstract: A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion, a polyester activator, and a formaldehyde resin. The alkaline nanosilica dispersion and the polyester activator may form a gelled solid after interaction over a contact period, such that the gelled solid incorporates the formaldehyde resin. Methods of lost circulation control using the LCM are also provided.
    Type: Application
    Filed: May 28, 2019
    Publication date: September 12, 2019
    Inventors: Vikrant Wagle, Rajendra Kalgaonkar, Abdullah Al-Yami, Zainab Alsaihati
  • Publication number: 20190276727
    Abstract: A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion and a polyester activator. The alkaline nanosilica dispersion and the polyester activator may form a gelled solid after interaction over a contact period. Methods of lost circulation control using the LCM are also provided.
    Type: Application
    Filed: May 28, 2019
    Publication date: September 12, 2019
    Inventors: Vikrant Wagle, Rajendra Kalgaonkar, Abdullah Al-Yami, Zainab Alsaihati
  • Patent number: 10351755
    Abstract: A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion and a polyester activator. The alkaline nanosilica dispersion and the polyester activator may form a gelled solid after interaction over a contact period. Methods of lost circulation control using the LCM are also provided.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: July 16, 2019
    Assignee: Saudi Arabian Oil Company
    Inventors: Vikrant Wagle, Rajendra Kalgaonkar, Abdullah Al-Yami, Zainab Alsaihati
  • Publication number: 20190161668
    Abstract: A convertible composition comprising a nanosilica drilling fluid, the nanosilica drilling fluid comprising an aqueous based drilling mud, where the aqueous based drilling mud comprises water, and an alkaline nanosilica dispersion, where the alkaline nanosilica dispersion comprises nanosilica; and a chemical activator, the chemical activator operable to hydrolyze in the presence of water to produce an acid, where a weight ratio of the alkaline nanosilica dispersion to the chemical activator is between 1 to 0.001 and 1 to 0.25.
    Type: Application
    Filed: November 27, 2017
    Publication date: May 30, 2019
    Inventors: Vikrant WAGLE, Abdullah AL-YAMI, Rajendra A. KALGAONKAR, Zainab ALSAIHATI
  • Publication number: 20190055456
    Abstract: A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion and an ester activator. The alkaline nanosilica dispersion and the ester activator may form a gelled solid after interaction over a contact period. Methods of lost circulation control using the LCM are also provided.
    Type: Application
    Filed: August 17, 2017
    Publication date: February 21, 2019
    Inventors: Vikrant Wagle, Rajendra Kalgaonkar, Abdullah Al-Yami, Zainab Alsaihati
  • Publication number: 20190055455
    Abstract: A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion and a polyester activator. The alkaline nanosilica dispersion and the polyester activator may form a gelled solid after interaction over a contact period. Methods of lost circulation control using the LCM are also provided.
    Type: Application
    Filed: August 17, 2017
    Publication date: February 21, 2019
    Inventors: Vikrant Wagle, Rajendra Kalgaonkar, Abdullah Al-Yami, Zainab Alsaihati
  • Patent number: 10151420
    Abstract: A thermally insulating composition comprises: (A) an aqueous liquid, wherein the aqueous liquid is the continuous phase of the composition; (B) a particulate, wherein the particulate is silica, and wherein the particulate is a dispersed phase of the composition; and (C) an activator, wherein the activator causes at least some of the particulate to aggregate and form a network of at least the particulate, wherein the formation of the network causes the insulating composition to become a gel, and wherein the gelled insulating composition inhibits or prevents heat loss from two areas having different temperatures. A method of thermally insulating a portion of an annulus comprises: introducing the insulating composition into a portion of an annulus, wherein the gelled insulating composition inhibits or prevents heat loss from the portion of the annulus to an area adjacent to the outside of a second object.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: December 11, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Rajendra A. Kalgaonkar, Vikrant B. Wagle
  • Patent number: 10011755
    Abstract: A method of treating a well the method including the steps of: (A) forming a fluid including: (i) a shear-thinning aqueous liquid phase; and (ii) an inorganic setting material; wherein the fluid is shear-thinning, pumpable, and settable; and (B) introducing the fluid into the well.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: July 3, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Arunesh Kumar, Sharath Savari, Jason T. Scorsone, Rajendra A. Kalgaonkar
  • Patent number: 9410070
    Abstract: A treatment fluid for treating a portion of a high-temperature subterranean formation comprises: a base fluid, wherein the base fluid comprises water; a viscosifier, wherein the viscosifier is a polymer, and wherein the viscosifier is thermally stable up to a temperature of 325° F.; and a stabilizer package, wherein the stabilizer package: (A) comprises a first stabilizer and a second stabilizer, wherein the first stabilizer is an oxygen scavenger and the second stabilizer is a pH adjustor; and (B) is capable of increasing the thermal stability of the viscosifier to a temperature greater than 350° F., wherein the portion of the subterranean formation has a bottomhole temperature greater than 350° F. A method of treating a high-temperature subterranean formation comprises introducing the treatment fluid into the portion of the subterranean formation.
    Type: Grant
    Filed: September 20, 2014
    Date of Patent: August 9, 2016
    Inventors: Prerana U. Suryawanshi, Achala V. Danait, Rajendra A. Kalgaonkar