Patents by Inventor Randall S. Shafer

Randall S. Shafer 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: 20190186233
    Abstract: A method of plugging a hydrocarbon well includes deploying a downhole tool to remove at least a portion of a casing at a section of well to be plugged. Deploying a blocking device downhole to block a bottom of the section of well to be plugged. Deploying a plugging material downhole onto the blocking device to fill an area to be plugged. Deploying an exothermic fluid downhole, wherein activation of the exothermic material liquefies the plugging material. Allowing the plugging material and the exothermic fluid to solidify form a cast-in-place plug that fills the section of well to be plugged.
    Type: Application
    Filed: December 13, 2018
    Publication date: June 20, 2019
    Inventor: Randall S. SHAFER
  • Patent number: 10316612
    Abstract: A plug for Plug and Abandonment (P&A) operations and methods of installation and use. The plug is a two-part plug of bismuth-based alloy and resin, allowing for sealing of an oil well using two different mechanisms with a shorter plug.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: June 11, 2019
    Assignee: ConocoPhillips Company
    Inventor: Randall S. Shafer
  • Publication number: 20190128092
    Abstract: Method of plugging a hydrocarbon well by a through-tubing technique are described. The method allows the tubing to be left in place. Only a short (<2 m) section is cut, milled, perforated, ruptured and expanded, or combinations thereof. A blocking device is sent downhole to block a bottom of the plug section, and bismuth alloy pellets dropped onto the blocking device. A heater is deployed to melt the bismuth alloy pellets. Next, the alloy liquid is allowed to cool and solidify. During solidification, the alloy expands and fills the section of well to be plugged or a portion thereof. Once primary and secondary barriers are in place, the well can be closed and the Christmas tree removed. A rock-to-rock plug can be set by removing or partially removing the tubular and outer casing, or just inner casing/tubulars can be removed if the exterior cement and casing are of sufficient quality.
    Type: Application
    Filed: October 30, 2018
    Publication date: May 2, 2019
    Inventors: Dan MUELLER, Geir Ove TITLESTAD, David D. HEARN, Curtis G. BLOUNT, Rick D. WATTS, Randall S. SHAFER, Dale R. DOHERTY
  • Patent number: 10260288
    Abstract: Systems and methods contain fluids discharged from a subsea well or at the surface by capping the well blowout with a pre-positioned capping device. The capping device includes at least one blind shear ram and is separate from a blowout preventer. The blowout preventer may operate to control well events up to a certain pressure, above which the capping device is employed since the capping device has a higher pressure rating than the blowout preventer.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: April 16, 2019
    Assignee: CONOCOPHILLIPS COMPANY
    Inventors: Randall S. Shafer, Gordon T. Poss
  • Publication number: 20180298715
    Abstract: A plug for Plug and Abandonment (P&A) operations and methods of use are described. The plug comprises a bismuth-based alloy and resin, allowing for sealing of an oil well using two different mechanisms with a shorter plug.
    Type: Application
    Filed: April 9, 2018
    Publication date: October 18, 2018
    Inventor: Randall S. SHAFER
  • Publication number: 20180258735
    Abstract: A method for creating access to annular spacing during P&A operations is described. Specifically, helical coils are cut into one or more casings before the plugging material is set. The plugging material is able to exit the helical coils, forming multiple, small rock-to-rock seals.
    Type: Application
    Filed: March 12, 2018
    Publication date: September 13, 2018
    Inventor: Randall S. SHAFER
  • Publication number: 20180216437
    Abstract: Methods of plugging a hydrocarbon well by a through-tubing technique wherein the tubing is left in place, and only very short (<5 m) sections are cut, milled, perforated, ruptured and expanded, or combinations thereof. A blocking device is sent downhole if needed to block a bottom of the plug section, and resin dropped onto the blocking device to make a first plug, then cement is deployed onto said first plug to form a second plug. Therefore, the final interval is plugged with a two material binary plug. Once completed, and both primary and secondary barriers are in place, the well can be closed and the Christmas tree removed. A rock-to-rock plug can be set by removing or partially removing the tubular and the outer casing, or just inner casing/tubulars can be removed if the exterior cement and casing are of sufficient quality.
    Type: Application
    Filed: September 27, 2017
    Publication date: August 2, 2018
    Inventor: Randall S. SHAFER
  • Publication number: 20180148991
    Abstract: This disclosure describes a device and method of sealing perforations on a well casing inside a subterranean well. The device comprises a generally cylindrical sleeve having a open top and a closed bottom; a heater located inside the sleeve, the heater comprising a thermite mixture; an ignition mechanism that ignites the thermite mixture upon actuation; and a string connected to the heater ignition and detachably engages the sleeve.
    Type: Application
    Filed: September 15, 2017
    Publication date: May 31, 2018
    Inventors: David D. Hearn, Casey HIRSCHMANN, Randall S. Shafer, Stewart M. ROBERTSON, Dan MUELLER
  • Publication number: 20180094504
    Abstract: A composition for a plug for wellbores undergoing plugging and abandonment operations is described. Methods of setting the plug are also described.
    Type: Application
    Filed: September 15, 2017
    Publication date: April 5, 2018
    Inventors: David D. Hearn, Casey HIRSCHMANN, Randall S. Shafer
  • Patent number: 9347270
    Abstract: Systems and methods contain fluids discharged from a subsea well or at the surface by capping the well blowout with a pre-positioned capping device and diverting flow of hydrocarbons to a secondary location for disposal/handling in situations where casing integrity is compromised preventing ability to close in the flow of the hydrocarbons. The capping device includes at least one blind shear ram and is separate from a blowout preventer. Different personnel offsite of a rig drilling the well may have access and control to operate the device.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: May 24, 2016
    Assignee: ConocoPhillips Company
    Inventors: Randall S. Shafer, Graham Alvord, Rune Woie
  • Patent number: 9255446
    Abstract: Systems and methods contain fluids discharged from a subsea well or at the surface by capping the well blowout with a pre-positioned capping device. The capping device includes at least one blind shear ram and is separate from a blowout preventer. Different personnel offsite of a rig drilling the well may have access and control to operate the device.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: February 9, 2016
    Assignee: ConocoPhillips Company
    Inventor: Randall S. Shafer
  • Publication number: 20150129234
    Abstract: An offshore drilling unit includes a main body configured to be bottom supported in shallow water. Also included is an anchoring assembly secured to a sea floor. Further included is a tensioning system operatively coupled to the main body and the anchoring assembly, wherein the tensioning system is configured to apply a downward force on the main body to resist ice loads imposed on the offshore drilling unit.
    Type: Application
    Filed: November 10, 2014
    Publication date: May 14, 2015
    Inventors: Peter NOBLE, Randall S. SHAFER
  • Patent number: 8967273
    Abstract: A system for the detection, containment and removal of hydrocarbon leaks in a subsea environment.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: March 3, 2015
    Assignee: ConocoPhillips Company
    Inventors: Anthony W. Ray, Randall S. Shafer, Ravi Aurora, Dominique P. Berta
  • Patent number: 8956081
    Abstract: An ice worthy jack-up rig that may extend the drilling season in shallow water off shore Arctic or ice prone locations. The rig would work like a conventional jack-up rig while in open water with the hull jacked up out of the water. However, in the event of ice conditions, the legs are held in place by cans embedded in the sea floor to resist lateral movement of the rig and the hull is lowered into the water into an ice defensive configuration. The hull is specifically shaped with an ice-bending surface to bend and break up ice that comes in contact with the hull while in the ice defensive configuration.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: February 17, 2015
    Assignee: ConocoPhillips Company
    Inventors: Peter G. Noble, Randall S. Shafer, Dominique P. Berta
  • Publication number: 20150021036
    Abstract: Systems and methods contain fluids discharged from a subsea well or at the surface by capping the well blowout with a pre-positioned capping device. The capping device includes at least one blind shear ram and is separate from a blowout preventer. Different personnel offsite of a rig drilling the well may have access and control to operate the device.
    Type: Application
    Filed: June 23, 2014
    Publication date: January 22, 2015
    Inventor: Randall S. SHAFER
  • Publication number: 20150021037
    Abstract: Systems and methods contain fluids discharged from a subsea well or at the surface by capping the well blowout with a pre-positioned capping device and diverting flow of hydrocarbons to a secondary location for disposal/handling in situations where casing integrity is compromised preventing ability to close in the flow of the hydrocarbons. The capping device includes at least one blind shear ram and is separate from a blowout preventer. Different personnel offsite of a rig drilling the well may have access and control to operate the device.
    Type: Application
    Filed: June 24, 2014
    Publication date: January 22, 2015
    Inventors: Randall S. SHAFER, Graham ALVORD, Rune WOIE
  • Publication number: 20150021038
    Abstract: Systems and methods contain fluids discharged from a subsea well or at the surface by capping the well blowout with a pre-positioned capping device. The capping device includes at least one blind shear ram and is separate from a blowout preventer. The blowout preventer may operate to control well events up to a certain pressure, above which the capping device is employed since the capping device has a higher pressure rating than the blowout preventer.
    Type: Application
    Filed: July 8, 2014
    Publication date: January 22, 2015
    Inventors: Randall S. SHAFER, Gordon T. POSS
  • Patent number: 8911179
    Abstract: The invention relates to a jack-up rig. The inventive rig would work like a conventional jack-up rig while in open water with the hull jacked up out of the water. However, in the event of ice conditions, the hull is lowered into the water into an ice defensive configuration. The hull is specifically shaped with a lower portion that is an ice-bending surface to bend and break up ice that comes in contact with the hull while in the ice defensive configuration. Furthermore, the jack-up rig comprises at least two derricks.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: December 16, 2014
    Assignees: ConocoPhillips Company, Keppel Offshore & Marine Technology
    Inventors: Peter G. Noble, Randall S. Shafer, Dominique P. Berta, Yew Yuen Chow, Tak On Cheung, Kok Seng Foo, Chin Kau Quah, Cynthia Wang
  • Patent number: 8870497
    Abstract: The invention relates to an ice worthy jack-up rig with a conical piled monopod working together to drill wells and produce hydrocarbons in ice prone locations. The inventive rig would work like a conventional jack-up rig while in open water with the hull jacked up out of the water. However, in the event of ice conditions, the legs are held in place by cans embedded in the sea floor to resist lateral movement of the rig. Both the hull and conical piled monopod are shaped with ice-bending surfaces to bend and break up ice that comes into contact.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: October 28, 2014
    Assignee: ConocoPhillips Company
    Inventors: Randall S. Shafer, Peter G. Noble, Ravi P. Aurora, Thomas E. Ramsey, Ted H. Westerman, Dominique P. Berta
  • Patent number: 8851176
    Abstract: The present invention relates to recovery of hydrocarbons being released subsea in an uncontrolled manner. More specifically, the invention relates to an apparatus, process and system for the recovery of well stream products being released subsea in an uncontrolled manner, optionally under conditions that are conducive to the formation of gas hydrate crystals.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: October 7, 2014
    Assignee: ConocoPhillips Company
    Inventors: Peter G. Noble, Randall S. Shafer