公开(公告)号：US12123278B2

公开(公告)日：2024-10-22

申请号：US18011576

申请日：2021-06-22

申请人： BISN TEC LTD.

发明人： Paul Carragher ,  Andre Levchenko ,  Billy Clark ,  Lance Underwood

IPC分类号： E21B33/12 ,  E21B33/134 ,  E21B36/00

CPC分类号： E21B33/1212 ,  E21B33/134 ,  E21B36/008

摘要： A plug with composite reinforced end(s) and a mostly-bismuth-alloy middle section. At least one end comprises a composite material. One end is a composite, with a bismuth alloy and a particulate material of greater strength than the bismuth material. A plug having both ends of the composite material.

公开(公告)号：US12110259B2

公开(公告)日：2024-10-08

申请号：US16095928

申请日：2017-05-05

申请人： BiSN Tec Ltd

发明人： Paul Carragher

IPC分类号： C06B45/14 ,  C06B21/00 ,  E21B33/134 ,  E21B36/00

CPC分类号： C06B45/14 ,  C06B21/0041 ,  E21B33/134 ,  E21B36/00 ,  E21B36/008

摘要： 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.

公开(公告)号：US20230358113A1

公开(公告)日：2023-11-09

申请号：US18224521

申请日：2023-07-20

申请人： BiSN Tec Ltd.

发明人： Paul Carragher

IPC分类号： E21B33/13 ,  E21B36/00 ,  E21B33/134

CPC分类号： E21B33/13 ,  E21B36/00 ,  E21B33/134 ,  E21B36/008

摘要： The present disclosure 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 housing a chemical reaction heat source material. The heater body has a leading end that, in use, is deployed down-hole first. The heater is provided with ignition means, located in a heating zone proximal to the leading end of the heater body, for triggering a chemical reaction in the chemical reaction het source material located in the heating zone. The heater is further provided with an actuator housed within the heater body and configured to urge the chemical reaction heat source material towards the heating zone so as to generate a focused heating pattern.

公开(公告)号：US11634966B2

公开(公告)日：2023-04-25

申请号：US16304251

申请日：2017-05-24

申请人： BiSN Tec Ltd

发明人： Paul Carragher ,  Lance D Underwood

IPC分类号： E21B36/00 ,  E21B33/13 ,  E21B33/134

摘要： The present invention provides a cartridge (1) for a chemical heater used in down-hole operations. The cartridge (1) comprises a quantity of a chemical reaction heat source (2) wrapped in a temporary coating (3) that is capable of maintaining the shape of the cartridge (1) prior to use but which is consumed during the burn of the heater. The present invention also provides a eutectic/bismuth based alloy well plugging/sealing tool (5). The tool (5) having a tubular heater body (6) with an internal cavity (8) capable of receiving a chemical heat source and a quantity of eutectic/bismuth based alloy (7) provided in thermal communication with the heater body (6) around an outer surface of the heater body (6). The tool has a sleeve (10) provided around an outer surface of the alloy (7), which insulates and/or mechanically protects the alloy (7) down-hole. In this way the sleeve (10) enables the diameter of tool (5) to be reduced whilst maintaining its functionality. In further aspect, the present invention also discloses the provision of a refractory lining (20) on the inner walls of the tubular heater body of chemical heaters, such as the heater (6) used in the eutectic/bismuth based alloy well plugging/sealing tool (5).

公开(公告)号：US20220018211A1

公开(公告)日：2022-01-20

申请号：US17195546

申请日：2021-03-08

申请人： BiSN Tec LTD

发明人： Paul Carragher

IPC分类号： E21B33/13 ,  E21B33/12 ,  C22C12/00 ,  E21B27/02 ,  E21B33/134 ,  E21B36/00 ,  E21B33/136 ,  E21B17/10 ,  C06B33/00 ,  C06B47/00 ,  C09K8/42 ,  C22C9/00

摘要： 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.

公开(公告)号：US10113386B2

公开(公告)日：2018-10-30

申请号：US15011308

申请日：2016-01-29

申请人： BISN TEC LTD

发明人： Paul Carragher

IPC分类号： E21B33/12 ,  E21B33/13 ,  E21B36/00 ,  E21B27/02 ,  E21B33/134 ,  E21B33/136 ,  E21B17/10 ,  C22C12/00 ,  C06B33/00 ,  C06B47/00 ,  C09K8/42

摘要： 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.

公开(公告)号：US20160145962A1

公开(公告)日：2016-05-26

申请号：US15011308

申请日：2016-01-29

申请人： BISN TEC LTD

发明人： Paul Carragher

IPC分类号： E21B33/12

CPC分类号： E21B33/13 ,  C06B33/00 ,  C06B47/00 ,  C09K8/426 ,  C22C9/00 ,  C22C12/00 ,  E21B17/1028 ,  E21B27/02 ,  E21B33/12 ,  E21B33/1204 ,  E21B33/134 ,  E21B33/136 ,  E21B36/008 ,  E21B47/00

摘要： 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.

摘要翻译： 提供了用于堵塞井，特别是油气井的塞子。 插头具有由较小厚度的外部金属管形成的插头体。 塞子还具有附接到外管的内表面的加强装置，其给予塞子至少与较厚金属管的截面结构强度相当的横截面结构强度。 插头具有沿着插头的轴线定位的中央加热器接收空隙，以使插头部署加热器能够被接纳在其中。 还提供了一种插头组件，其在垂直于在地下管道堵塞期间组件展开的平面的平面中具有可变的横截面面积。

公开(公告)号：US20150345248A1

公开(公告)日：2015-12-03

申请号：US14654423

申请日：2013-12-20

申请人： BISN TEC LTD

发明人： Paul Carragher

IPC分类号： E21B33/12

CPC分类号： E21B33/13 ,  C06B33/00 ,  C06B47/00 ,  C09K8/426 ,  C22C9/00 ,  C22C12/00 ,  E21B17/1028 ,  E21B27/02 ,  E21B33/12 ,  E21B33/1204 ,  E21B33/134 ,  E21B33/136 ,  E21B36/008 ,  E21B47/00

摘要： 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.

摘要翻译： 提供了用于堵塞井，特别是油气井的塞子（1）。 插头（1）具有由较小厚度的外部金属管（2）形成的插头体。 插头还具有附接到外管（2）的内表面的加强装置（4），其给予插塞至少与较厚金属管的截面结构强度相当的横截面结构强度。 插头具有沿着插头的轴线定位的中央加热器接收空隙，以使插头部署加热器能够被接纳在其中。 还提供了一种插塞组件（10），其在垂直于在地下管道堵塞期间组件展开的平面的平面中具有可变的横截面面积。

公开(公告)号：US20230417121A1

公开(公告)日：2023-12-28

申请号：US18038204

申请日：2021-11-22

申请人： BISN Tec Ltd.

发明人： Paul Carragher ,  Jake Dearmon ,  Didhiti Talapatra

IPC分类号： E21B33/13 ,  E21B36/00 ,  E21B31/08

CPC分类号： E21B33/13 ,  E21B36/008 ,  E21B31/08

摘要： A single trip method of repairing a leaking annular seal located within an annulus that encircles an oil/as wellbore tubular body, examples of such seals including annular packers or cement seals. The method comprises providing deflector within a wellbore tubular body adjacent to one or more openings in the wall of the tubular body. Alloy beads are then deployed downhole via the tubular body so that the alloy beads are deflected via said openings into the annulus where they accumulate on top of the annular seal. The alloy is then heated to form an alloy plug above the annular seal. The present invention also provides an annular seal repair tool assembly for use in the repair method of the present invention.

公开(公告)号：US11753897B2

公开(公告)日：2023-09-12

申请号：US16304262

申请日：2017-05-24

申请人： BiSN Tec Ltd.

发明人： Paul Carragher ,  Sylvain Bedouet

IPC分类号： E21B33/13 ,  E21B36/00 ,  E21B33/134

CPC分类号： E21B33/13 ,  E21B33/134 ,  E21B36/00 ,  E21B36/008

摘要： 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.