Patents by Inventor Radovan Rolovic

Radovan Rolovic 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: 20230110623
    Abstract: A system is provided including a coiled tubing reel apparatus including a reel drum for storing a coiled tubing string spooled on the reel drum and a hydraulic reel drive motor that controls rotation of the reel drum. The system further includes a reel controller that determines an estimated reel back tension for a portion of the coiled tubing string between the reel apparatus and the injector based on a set of parameters related to a coiled tubing operation. The reel controller determines a target reel back tension to be applied to the portion of the coiled tubing string by adjusting the estimated reel back tension based on a historical job dataset. The reel controller then determines and sets a target hydraulic pressure of the reel drive motor to achieve the target reel back tension in the portion of the coiled tubing string.
    Type: Application
    Filed: October 7, 2021
    Publication date: April 13, 2023
    Inventors: Oluwatosin Ogundare, Radovan Rolovic, Roshan Joy Jacob, Ramalakshmi Somaskandan, Daniel Joshua Stark, Jeremy C. Nicholson
  • Patent number: 11566479
    Abstract: A system is provided including a coiled tubing injector including at least two gripper chains for gripping a coiled tubing and a gripper system for generating a gripper force applied to the at least two gripper chains by adjusting gripper pressure on at least one gripper cylinder. A gripper controller is configured to determine a minimum gripper pressure and a maximum gripper pressure for the gripper cylinders, based on a current set of parameters related to lowering the coiled tubing into a wellbore or pulling out the coiled tubing from the wellbore. The gripper controller selects a target gripper pressure between the minimum gripper pressure and the maximum gripper pressure based on a historical data model and sets the target gripper pressure for the at least one gripper cylinder.
    Type: Grant
    Filed: November 3, 2021
    Date of Patent: January 31, 2023
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Oluwatosin Ogundare, Radovan Rolovic, Roshan Joy Jacob, Ramalakshmi Somaskandan, Jeremy C. Nicholson, Glenn Marvin Ozburn
  • Patent number: 11313186
    Abstract: Provided is a method for connecting coiled tubing strings, and a coiled tubing working connector, in accordance with one aspect of the disclosure. The method for connecting coiled tubing strings, in one aspect, includes lowering a downhole end of a first coiled tubing string within a wellbore, an uphole end of the first coiled tubing string remaining outside of the wellbore. The method, in one aspect, further includes coupling the uphole end of the first coiled tubing string to a downhole end of a second coiled tubing string while the uphole end of the first coiled tubing string remaining outside of the wellbore to form a combined coiled tubing string, and lowering the combined coiled tubing string within the wellbore.
    Type: Grant
    Filed: February 10, 2021
    Date of Patent: April 26, 2022
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Radovan Rolovic, Shubhangi Dalavi, Eric Bivens
  • Publication number: 20210246742
    Abstract: Provided is a method for connecting coiled tubing strings, and a coiled tubing working connector, in accordance with one aspect of the disclosure. The method for connecting coiled tubing strings, in one aspect, includes lowering a downhole end of a first coiled tubing string within a wellbore, an uphole end of the first coiled tubing string remaining outside of the wellbore. The method, in one aspect, further includes coupling the uphole end of the first coiled tubing string to a downhole end of a second coiled tubing string while the uphole end of the first coiled tubing string remaining outside of the wellbore to form a combined coiled tubing string, and lowering the combined coiled tubing string within the wellbore.
    Type: Application
    Filed: February 10, 2021
    Publication date: August 12, 2021
    Inventors: Radovan Rolovic, Shubhangi Dalavi, Eric Bivens
  • Patent number: 9404338
    Abstract: A method and apparatus for making real-time measurements of downhole properties during cement plug placement. A wired placement conduit is lowered downhole releasing a sensor package. The sensor package is capable of measuring downhole properties in real-time in the period while the cement plug sets.
    Type: Grant
    Filed: October 12, 2009
    Date of Patent: August 2, 2016
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Simon James, Bernard Piot, Michael Montgomery, Gérard Daccord, Radovan Rolovic, Mathew Samuel
  • Publication number: 20150356521
    Abstract: A system for oilfield equipment asset utilization improvement includes a number of units of oilfield equipment, the units of oilfield equipment having a common equipment type. The system further includes a controller having an equipment confidence module that interprets a condition value corresponding to each of the units of oilfield equipment, a job requirement module that interprets a performance requirement for an oil field procedure, and an equipment planning module that selects a set of units from the number of units of oilfield equipment in response to the performance requirement for the oilfield procedure and the condition value corresponding to each of the units of oilfield equipment. The equipment planning module selects the set of units such that a procedure success confidence value exceeds a completion assurance threshold.
    Type: Application
    Filed: August 18, 2015
    Publication date: December 10, 2015
    Inventors: Garud Bindiganavale Sridhar, Michael Wedge, Dzung Le, Sarmad Adnan, Iskandar Wijaya, Orlando Defreitas, Radovan Rolovic, Sandra Aldana, Luis Antonio Rodriguez
  • Patent number: 8826979
    Abstract: A method and apparatus for making real-time measurements of downhole properties during cement plug placement. A wired placement conduit (14) is lowered downhole releasing a sensor package (20). The sensor package is capable of measuring downhole properties in real-time in the period while the cement plug sets.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: September 9, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Simon James, Bernard Piot, Joel Rondeau, Michael Montgomery, Gérard Daccord, Radovan Rolovic, Mathew Samuel
  • Patent number: 8302703
    Abstract: A technique is used to control the direction of a drill bit or bottom hole assembly via hydraulic steering utilizing a plurality of steering pads. A portion of hydraulic fluid, e.g. drilling fluid, is directed under pressure to a pad interface region proximate each pad. The hydraulic fluid provides additional force against a surrounding wall and/or reduces or eliminates contact between the pads and the surrounding wall.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: November 6, 2012
    Assignee: Schlumberger Technology Corporation
    Inventor: Radovan Rolovic
  • Publication number: 20120000650
    Abstract: A method and apparatus for making real-time measurements of downhole properties during cement plug placement. A wired placement conduit (14) is lowered downhole releasing a sensor package (20). The sensor package is capable of measuring downhole properties in real-time in the period while the cement plug sets.
    Type: Application
    Filed: September 30, 2009
    Publication date: January 5, 2012
    Inventors: Simon James, Bernard Piot, Joel Rondeau, Michael Montgomery, Gérard Daccord, Radovan Rolovic, Mathew Samuel
  • Publication number: 20120000649
    Abstract: A method and apparatus for making real-time measurements of downhole properties during cement plug placement. A wired placement conduit (30) is lowered downhole releasing a sensor package (34). The sensor package is capable of measuring downhole properties in real-time in the period while cement plug sets.
    Type: Application
    Filed: September 30, 2009
    Publication date: January 5, 2012
    Inventors: Simon James, Bernard Piot, Joel Rondeau, Michael Montgomery, Gérard Daccord, Radovan Rolovic, Mathew Samuel
  • Publication number: 20120000655
    Abstract: A method and apparatus for making real-time measurements of downhole properties during cement plug placement. A wired placement conduit is lowered downhole releasing a sensor package. The sensor package is capable of measuring downhole properties in real-time in the period while the cement plug sets.
    Type: Application
    Filed: October 12, 2009
    Publication date: January 5, 2012
    Applicant: Schlumberger Technology Corporation
    Inventors: Simon James, Bernard Piot, Michael Montgomery, Gérard Daccord, Radovan Rolovic, Mathew Samuel
  • Patent number: 7886826
    Abstract: A method for treating a subterranean wellbore. More specifically, a method for removing wellbore solids. A first, polymer containing fluid is placed in the solids bed. A second, viscosifying fluid is then placed into the solids bed thereby agitating the solids in the bed and causing the formation of a gel capsules when mixed with the biopolymer fluid. These gel capsules are capable of trapping or entraining the agitated solids. The gel capsules typically have a relatively high volume and a relatively low density, thereby making their removal from the wellbore easier.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: February 15, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Geoff Robinson, Radovan Rolovic, Philip F. Sullivan, Golchehreh Salamat
  • Publication number: 20100206567
    Abstract: The present invention is a method for treating a subterranean wellbore. More specifically, the invention is a method for removing wellbore solids. A first, polymer containing fluid is placed in the solids bed. A second, viscosifying fluid is then placed into the solids bed thereby agitating the solids in the bed and causing the formation of a gel capsules when mixed with the biopolymer fluid. These gel capsules are capable of trapping or entraining the agitated solids. The gel capsules typically have a relatively high volume and a relatively low density, thereby making their removal from the wellbore easier.
    Type: Application
    Filed: April 23, 2010
    Publication date: August 19, 2010
    Inventors: Geoff Robinson, Radovan Rolovic, Philip F. Sullivan, Golchehreh Salamat
  • Patent number: 7703529
    Abstract: Disclosed are methods of treating a producing well by removing wellbore solids. Accordingly, a first, polymer containing fluid is placed in the solids bed, and a second, viscosifying fluid is then placed into the solids bed thereby agitating the solids in the bed and causing the formation of a gel capsules when mixed with the biopolymer fluid. These gel capsules are capable of trapping or entraining the agitated solids. The gel capsules typically have a relatively high volume and a relatively low density, thereby making their removal from the wellbore easier.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: April 27, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Geoff Robinson, Radovan Rolovic, Philip F. Sullivan, Golchehreh Salamat
  • Publication number: 20090133931
    Abstract: A method for hydraulically controlling the direction of a drill bit or bottom hole assembly containing a drill contains lateral orifices which can be selectively opened and closed to move a portion of drilling fluid from the drill string out into a narrow gap between the lateral orifices and a lateral bore hole face or wall, which produces a lateral hydraulic force to thereby push the drill bit or bottom hole assembly in an opposite direction of the fluid flow through the lateral orifices. The apparatus for accomplishing this hydraulic steering can provide for the movement of the tip of the orifice into close proximity with the bore hole face to thereby increase the lateral hydraulic force created. This method can also be adapted to push-the-bit bore hole pads to minimize their contact with the bore hole while increasing the lateral force obtained by their engagement.
    Type: Application
    Filed: November 27, 2007
    Publication date: May 28, 2009
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: RADOVAN ROLOVIC
  • Publication number: 20080066962
    Abstract: Apparatus and methods for measuring solids in wellbore that include a bottom hole assembly having a sensor to measuring a characteristic indicative of solids in the wellbore. The measurement may be used to measure solids or solids suspended in fluid flow. The invention is useful for use in wellbore cleanouts. A computer model may be used and updated based on the measured characteristic. The input of measured characteristic and the updating of the computer model may be performed in real time whilst the wellbore cleanout operation is ongoing.
    Type: Application
    Filed: November 6, 2007
    Publication date: March 20, 2008
    Inventors: Radovan Rolovic, Stephen Hill, Frank Espinosa, John Lovell
  • Patent number: 7308941
    Abstract: Apparatus and methods for measuring solids in wellbore that include a bottom hole assembly having a sensor to measuring a characteristic indicative of solids in the wellbore. The measurement may be used to measure solids or solids suspended in fluid flow. The invention is useful for use in wellbore cleanouts. A computer model may be used and updated based on the measured characteristic. The input of measured characteristic and the updating of the computer model may be performed in real time whilst the wellbore cleanout operation is ongoing.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: December 18, 2007
    Assignee: Schlumberger Technology Corporation
    Inventors: Radovan Rolovic, Stephen D. Hill, Frank Espinosa, John R. Lovell
  • Publication number: 20050178548
    Abstract: The present invention is a method for treating a subterranean wellbore. More specifically, the invention is a method for removing wellbore solids. A first, polymer containing fluid is placed in the solids bed. A second, viscosifying fluid is then placed into the solids bed thereby agitating the solids in the bed and causing the formation of a gel capsules when mixed with the biopolymer fluid. These gel capsules are capable of trapping or entraining the agitated solids. The gel capsules typically have a relatively high volume and a relatively low density, thereby making their removal from the wellbore easier.
    Type: Application
    Filed: February 13, 2004
    Publication date: August 18, 2005
    Inventors: Geoff Robinson, Radovan Rolovic, Philip Sullivan, Golchehreh Salamat
  • Publication number: 20050126777
    Abstract: Apparatus and methods for measuring solids in wellbore that include a bottom hole assembly having a sensor to measuring a characteristic indicative of solids in the wellbore. The measurement may be used to measure solids or solids suspended in fluid flow. The invention is useful for use in wellbore cleanouts. A computer model may be used and updated based on the measured characteristic. The input of measured characteristic and the updating of the computer model may be performed in real time whilst the wellbore cleanout operation is ongoing.
    Type: Application
    Filed: December 10, 2004
    Publication date: June 16, 2005
    Inventors: Radovan Rolovic, Stephen Hill, Frank Espinosa, John Lovell
  • Patent number: 6457534
    Abstract: This invention relates to a method for use in coiled tubing operations wherein fatigue of the coiled tubing owing to short trips is reduced by reducing the number of bending and straightening events that coiled tubing undergoes to accomplish a particular wellbore objective. The invention relates to a method that allows the coiled tubing reel and tubing reeled thereon to remain stationary while making small movements of coiled tubing using the injector. The invention also relates to a method that permits synchronized movement of coiled tubing between the coiled tubing reel and injector.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: October 1, 2002
    Assignee: Schlumberger Technology Corporation
    Inventors: Radovan Rolovic, David Stein