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.

公开(公告)号：US11525326B2

公开(公告)日：2022-12-13

申请号：US17367376

申请日：2021-07-04

申请人： BiSN Tec Ltd

发明人： Paul Carragher

IPC分类号： E21B33/122 ,  E21B33/124 ,  E21B33/12 ,  E21B36/00 ,  E21B31/00 ,  E21B29/10 ,  E21B17/042 ,  E21B33/13 ,  E21B41/00 ,  E21B19/00 ,  E21B33/14 ,  E21B43/10

摘要： An oil or gas well downhole fishing tool has a receptacle that is open at one end. The tool also has deployment tool engaging means, located on the opposite end of the receptacle to the one end. The tool further has a layer of an alloy provided on the interior surface of the receptacle. The alloy is a eutectic alloy and/or bismuth alloy. The tool further comprises heating means to heat the alloy so that it melts and can flow over any object received within the receptacle.

公开(公告)号：US11434716B2

公开(公告)日：2022-09-06

申请号：US17068491

申请日：2020-10-12

申请人： BiSN Tec Ltd

发明人： Paul Carragher ,  Leo Richards

IPC分类号： E21B33/138 ,  E21B33/13 ,  E21B23/00 ,  E21B33/12 ,  E21B33/134 ,  E21B36/00

摘要： 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.

公开(公告)号：US20210246758A1

公开(公告)日：2021-08-12

申请号：US17068491

申请日：2020-10-12

申请人： BiSN Tec Ltd

发明人： Paul Carragher ,  Leo Richards

IPC分类号： E21B33/13 ,  E21B23/00 ,  E21B33/12 ,  E21B33/134 ,  E21B33/138 ,  E21B36/00

摘要： 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.

公开(公告)号：US11053771B2

公开(公告)日：2021-07-06

申请号：US16429037

申请日：2019-06-02

申请人： BiSN Tec Ltd

发明人： Paul Carragher

IPC分类号： E21B31/00 ,  E21B33/122 ,  E21B33/124 ,  E21B33/12 ,  E21B36/00 ,  E21B29/10 ,  E21B17/042 ,  E21B33/13 ,  E21B41/00 ,  E21B19/00 ,  E21B33/14 ,  E21B43/10

摘要： 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).

公开(公告)号：US20200248526A1

公开(公告)日：2020-08-06

申请号：US16589012

申请日：2018-04-04

申请人： BiSN Tec Ltd

发明人： Paul Carragher ,  Sylvain Bedouet

IPC分类号： E21B33/12

摘要： The present invention provides a thermally deformable annular packer with pressure relief means for use in oil and gas wells. The annular packer is formed from a stack of component parts, said parts comprising one or more eutectic alloy based ring sections sandwiched between two end sections. At least one of the annular packer component parts has one or more enclosed voids that are configured to become exposed when the packer is subjected to a predetermined pressure or temperature. The exposure of the enclosed voids serves to increase the effective volume within the sealed region formed by the annular packer in the annulus between two coaxial well casing/tubing. The increase in the effective volume serves to reduce the pressure within the sealed region thus preventing a build-up of pressure that might otherwise have damaged the well casing/tubing.

公开(公告)号：US10370931B2

公开(公告)日：2019-08-06

申请号：US15502966

申请日：2015-08-14

申请人： BISN TEC LTD.

发明人： Paul Carragher

IPC分类号： E21B33/13 ,  E21B33/122 ,  E21B31/00 ,  E21B29/10 ,  E21B17/042 ,  E21B41/00 ,  E21B19/00 ,  E21B33/14 ,  E21B43/10

摘要： 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.

公开(公告)号：US20190186230A1

公开(公告)日：2019-06-20

申请号：US16326183

申请日：2017-08-21

申请人： BiSN Tec Ltd

发明人： Paul Carragher ,  Lance Underwood ,  Sylvain Bedouet

IPC分类号： E21B33/124 ,  E21B33/13

CPC分类号： E21B36/008 ,  E21B33/1208 ,  E21B33/13 ,  E21B33/134 ,  F24V30/00

摘要： 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).

公开(公告)号：US20170306717A1

公开(公告)日：2017-10-26

申请号：US15648277

申请日：2017-07-12

申请人： BISN TEC LTD

发明人： Paul Carragher ,  Leo Richard

IPC分类号： E21B33/13 ,  E21B33/134 ,  E21B23/00 ,  E21B33/12 ,  E21B36/00 ,  E21B33/138

CPC分类号： E21B33/13 ,  E21B23/00 ,  E21B33/12 ,  E21B33/134 ,  E21B33/138 ,  E21B36/00

摘要： 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.