Patents by Inventor Paul Carragher

Paul Carragher 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: 10370931
    Abstract: A first aspect of the invention provides a gas or oil well tubing having an annular packer mounted thereon, wherein the annular packer is formed from an eutectic alloy. By prefabricating the annular packer on the tubing it can be placed in situ from the outset and thus can be active by melting at any time to form a eutectic seal quickly and easily. An annular packer with by-pass conduits is also provided to enable cement to be pumped past the annular packer when it is in situ. The annular packer is further provided with conduit clearance means to clear cement from within the conduits.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: August 6, 2019
    Assignee: BiSN Tec Ltd.
    Inventor: Paul Carragher
  • Patent number: 10329872
    Abstract: Apparatus, in the form of a eutectic alloy plug (1) and a deployment heater (10) are provided. The plug (1) and the deployment heated (10) are provided with means (5, 13) for releasably retaining the deployment heater (10) within a cavity (4) in the plug (1). The nature of the retaining means is such that once the plug (1) is secured in a well the heater (10) can be recovered without the plug (1). An extraction heater (20), which is also receivable within the cavity (4) of the plug (1), is provided to re-melt the eutectic alloy and thus enable the extraction of the plug from a well. Various method of plugging abandoned wells are made possible by the control that the provided apparatus gives.
    Type: Grant
    Filed: August 19, 2018
    Date of Patent: June 25, 2019
    Assignee: BiSN Tec Ltd
    Inventors: Paul Carragher, Leo Richards
  • Publication number: 20190186230
    Abstract: The present invention provides a method of sealing a region of a sand screen of an Open Hole Gravel Pack without the need to perforate the sand screen and a tool for use in such. The tool being a eutectic/bismuth based alloy well plugging/sealing tool (1) having a tubular heater body (2) with an internal cavity (4) capable of receiving a chemical heat source (105). The tool is provided with a quantity of eutectic/bismuth based alloy (3) around an outer surface of the heater body (2) such that it can be heated by the chemical heat source (105). In addition the tool (1) has an insulating sleeve (7) provided around an outer surface of the alloy (3), wherein the sleeve (7) is configured to provide a focused egress for the alloy (3) as it is melted by the chemical heat source (105).
    Type: Application
    Filed: August 21, 2017
    Publication date: June 20, 2019
    Applicant: BiSN Tec Ltd
    Inventors: Paul Carragher, Lance Underwood, Sylvain Bedouet
  • Patent number: 10309187
    Abstract: An oil or gas well fishing tool (60). The downhole fishing tool (60) has a receptacle (61) that is open at one end. The tool also has deployment tool engaging means (62), located on the opposite end of the receptacle (61) to the one end. The tool further has a layer of an alloy (64) provided on the interior surface of the receptacle (61). The alloy is a eutectic alloy and/or a bismuth alloy. The tool further comprises heating means (65) to heat the alloy (64) so that it melts and can flow over any object received within the receptacle (61).
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: June 4, 2019
    Assignee: BiSN Tec Ltd.
    Inventor: Paul Carragher
  • Publication number: 20190144355
    Abstract: A chemical reaction heat source for use in heaters for downhole applications is provided. The heat source has a solid fuel composition that comprises thermite and a binding agent. The binding agent serving to maintain the solid form of the solid fuel composition during burning and ensure a predetermined uniform heating pattern can be provided for longer. The solid fuel composition can be provided in the form of blocks. The solid fuel composition can also be provided in the form of a plurality of fragments that, during burning, behave more like powdered thermite and have the ability to flow.
    Type: Application
    Filed: May 5, 2017
    Publication date: May 16, 2019
    Applicant: BiSN Tec Ltd
    Inventor: Paul CARRAGHER
  • Publication number: 20190128091
    Abstract: A plug for plugging wells, and in particular oil and gas wells, is provided. The plug has a plug body formed from an outer metal tube of a reduced thickness. The plug also has reinforcement means, attached to an inner surface of the outer tube, that give the plug a cross-sectional structural strength that is at least equivalent to that of a thicker metal tube. The plug has a central heater receiving void located along the axis of the plug to enable a plug deployment heater to be received therein. Also provided is a plug assembly with a variable cross-sectional area in a plane perpendicular to the plane in which the assembly is deployed during the plugging of underground conduits.
    Type: Application
    Filed: October 29, 2018
    Publication date: May 2, 2019
    Applicant: BiSN Tec Ltd
    Inventor: Paul Carragher
  • Publication number: 20190085659
    Abstract: The present invention provides a chemical heater for use in down-hole operations together with methods for operating such in oil/gas wells. The chemical heater comprises a heater body (1) housing a chemical reaction heat source material (2). The heater body (1) has a leading end that, in use, is deployed down-hole first. The heater is provided with ignition means (3), located in a heating zone proximal to the leading end of the heater body, for triggering a chemical reaction in the chemical reaction heat source material located in the heating zone (4, 4a). The heater is further provided with an actuator (5,6) housed within the heater body (1) and configured to urge the chemical reaction heat source material (2) towards the heating zone so as to generate a focused heating pattern.
    Type: Application
    Filed: May 24, 2017
    Publication date: March 21, 2019
    Applicant: BiSN Tec Ltd
    Inventors: Paul Carragher, Sylvain Bedouet
  • Publication number: 20190071950
    Abstract: Apparatus, in the form of a eutectic alloy plug (1) and a deployment heater (10) are provided. The plug (1) and the deployment heated (10) are provided with means (5, 13) for releasably retaining the deployment heater (10) within a cavity (4) in the plug (1). The nature of the retaining means is such that once the plug (1) is secured in a well the heater (10) can be recovered without the plug (1). An extraction heater (20), which is also receivable within the cavity (4) of the plug (1), is provided to re-melt the eutectic alloy and thus enable the extraction of the plug from a well. Various method of plugging abandoned wells are made possible by the control that the provided apparatus gives.
    Type: Application
    Filed: August 19, 2018
    Publication date: March 7, 2019
    Applicant: BiSN Tec Ltd
    Inventors: Paul Carragher, Leo Richards
  • Publication number: 20190055806
    Abstract: A chemical reaction heat source for use in heaters used in down-hole applications is provided. The heat source has a fuel composition that comprises thermite and a damping agent. The use of the thermite mix enables the heaters of the present invention to generate hotter temperatures down wells. This in turn allows the use of Bismuth/Germanium alloys, which have higher melting points, to enable the production of plugs for the abandonment of deeper wells where subterranean temperatures are higher.
    Type: Application
    Filed: August 19, 2018
    Publication date: February 21, 2019
    Applicant: BiSN Tec LTD
    Inventor: Paul Carragher
  • Patent number: 10161215
    Abstract: A plug (1) for plugging wells, and in particular oil and gas wells, is provided. The plug (1) has a plug body formed from an outer metal tube (2) of a reduced thickness. The plug also has reinforcement means (4), attached to an inner surface of the outer tube (2), that give the plug a cross-sectional structural strength that is at least equivalent to that of a thicker metal tube. The plug has a central heater receiving void located along the axis of the plug to enable a plug deployment heater to be received therein. Also provided is a plug assembly (10) with a variable cross-sectional area in a plane perpendicular to the plane in which the assembly is deployed during the plugging of underground conduits.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: December 25, 2018
    Assignee: BiSN Tec Ltd
    Inventor: Paul Carragher
  • Patent number: 10145203
    Abstract: A chemical reaction heat source for use in heaters used in down-hole applications is provided. The heat source has a fuel composition that comprises thermite and a damping agent. The use of the thermite mix enables the heaters of the present invention to generate hotter temperatures down wells. This in turn allows the use of Bismuth/Germanium alloys, which have higher melting points, to enable the production of plugs for the abandonment of deeper wells where subterranean temperatures are higher.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: December 4, 2018
    Assignee: BiSN Tec Ltd
    Inventor: Paul Carragher
  • Patent number: 10113386
    Abstract: A plug for plugging wells, and in particular oil and gas wells, is provided. The plug has a plug body formed from an outer metal tube of a reduced thickness. The plug also has reinforcement means, attached to an inner surface of the outer tube, that give the plug a cross-sectional structural strength that is at least equivalent to that of a thicker metal tube. The plug has a central heater receiving void located along the axis of the plug to enable a plug deployment heater to be received therein. Also provided is a plug assembly with a variable cross-sectional area in a plane perpendicular to the plane in which the assembly is deployed during the plugging of underground conduits.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: October 30, 2018
    Assignee: BiSN Tec Ltd.
    Inventor: Paul Carragher
  • Patent number: 10053951
    Abstract: Apparatus, in the form of a eutectic alloy plug (1) and a deployment heater (10) are provided. The plug (1) and the deployment heated (10) are provided with means (5, 13) for releasably retaining the deployment heater (10) within a cavity (4) in the plug (1). The nature of the retaining means is such that once the plug (1) is secured in a well the heater (10) can be recovered without the plug (1). An extraction heater (20), which is also receivable within the cavity (4) of the plug (1), is provided to re-melt the eutectic alloy and thus enable the extraction of the plug from a well. Various method of plugging abandoned wells are made possible by the control that the provided apparatus gives.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: August 21, 2018
    Assignee: BiSN Tec Ltd
    Inventors: Paul Carragher, Leo Richards
  • Patent number: 10053950
    Abstract: A chemical reaction heat source for use in heaters used in down-hole applications is provided. The heat source has a fuel composition that comprises thermite and a damping agent. The use of the thermite mix enables the heaters of the present invention to generate hotter temperatures down wells. This in turn allows the use of Bismuth/Germanium alloys, which have higher melting points, to enable the production of plugs for the abandonment of deeper wells where subterranean temperatures are higher.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: August 21, 2018
    Assignee: BiSN Tec Ltd
    Inventor: Paul Carragher
  • Publication number: 20170306717
    Abstract: Apparatus, in the form of a eutectic alloy plug (1) and a deployment heater (10) are provided. The plug (1) and the deployment heated (10) are provided with means (5, 13) for releasably retaining the deployment heater (10) within a cavity (4) in the plug (1). The nature of the retaining means is such that once the plug (1) is secured in a well the heater (10) can be recovered without the plug (1). An extraction heater (20), which is also receivable within the cavity (4) of the plug (1), is provided to re-melt the eutectic alloy and thus enable the extraction of the plug from a well. Various method of plugging abandoned wells are made possible by the control that the provided apparatus gives.
    Type: Application
    Filed: July 12, 2017
    Publication date: October 26, 2017
    Applicant: BISN TEC LTD
    Inventors: Paul Carragher, Leo Richard
  • Publication number: 20170234100
    Abstract: A first aspect of the invention provides a gas or oil well tubing having an annular packer mounted thereon, wherein the annular packer is formed from an eutectic alloy. By prefabricating the annular packer on the tubing it can be placed in situ from the outset and thus can be active by melting at any time to form a eutectic seal quickly and easily. An annular packer with by-pass conduits is also provided to enable cement to be pumped past the annular packer when it is in situ. The annular packer is further provided with conduit clearance means to clear cement from within the conduits.
    Type: Application
    Filed: August 14, 2015
    Publication date: August 17, 2017
    Applicant: BISN TECH LTD.
    Inventor: Paul CARRAGHER
  • Publication number: 20170234093
    Abstract: An oil or gas well fishing tool (60) is provided. The downhole fishing tool (60) has a receptacle (61) that is open at one end. The tool also has deployment tool engaging means (62), located on the opposite end of the receptacle (61) to the one end. The tool further has a layer of an alloy (64) provided on the interior surface of the receptacle (61). The alloy is a eutectic alloy and/or a bismuth alloy. The tool further comprises heating means (65) to heat the alloy (64) so that it melts and can flow over any object received within the receptacle (61).
    Type: Application
    Filed: August 14, 2015
    Publication date: August 17, 2017
    Applicant: BISN TECH LTD.
    Inventor: Paul CARRAGHER
  • Publication number: 20170226819
    Abstract: A downhole tool for use in a gas or oil well is provided. The tool comprising a length of tubing having at least one annular sealing means mounted on the outer surface thereof. The annular sealing means, which are formed from a eutectic/bismuth based alloy, serve to secure the downhole tool in position within an oil or gas well during so that the tool can carry out its function.
    Type: Application
    Filed: August 14, 2015
    Publication date: August 10, 2017
    Applicant: BISN TEC LTD.
    Inventor: Paul CARRAGHER
  • Patent number: 9708882
    Abstract: Apparatus, in the form of a eutectic alloy plug (1) and a deployment heater (10) are provided. The plug (1) and the deployment heated (10) are provided with means (5, 13) for releasably retaining the deployment heater (10) within a cavity (4) in the plug (1). The nature of the retaining means is such that once the plug (1) is secured in a well the heater (10) can be recovered without the plug (1). An extraction heater (20), which is also receivable within the cavity (4) of the plug (1), is provided to re-melt the eutectic alloy and thus enable the extraction of the plug from a well. Various method of plugging abandoned wells are made possible by the control that the provided apparatus gives.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: July 18, 2017
    Assignee: BISN OIL TOOLS
    Inventors: Paul Carragher, Leo Richards
  • Publication number: 20170089168
    Abstract: A chemical reaction heat source for use in heaters used in down-hole applications is provided. The heat source has a fuel composition that comprises thermite and a damping agent. The use of the termite mix enables the heaters of the present invention to generate hotter temperatures down wells. This in turn allows the use of Bismuth/Germanium alloys, which have higher melting points, to enable the production of plugs for the abandonment of deeper wells where subterranean temperatures are higher.
    Type: Application
    Filed: December 9, 2016
    Publication date: March 30, 2017
    Applicant: BISN TECH LTD.
    Inventor: Paul Carragher