公开(公告)号：WO2017203248A1

公开(公告)日：2017-11-30

申请号：PCT/GB2017/051458

申请日：2017-05-24

Applicant: BISN TEC LTD

Inventor： CARRAGHER, Paul ,  UNDERWOOD, Lance

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

Abstract: 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).

Abstract translation: 本发明提供了一种用于在井下作业中使用的化学加热器的筒（1）。 药筒（1）包括一定量的化学反应热源（2），所述化学反应热源（2）包裹在临时涂层（3）中，所述临时涂层能够在使用之前保持药筒（1）的形状，但在燃烧期间 加热器。 本发明还提供了一种共晶/铋基合金填塞/密封工具（5）。 具有管状加热器本体（6）的工具（5）具有能够接收化学热源的内腔（8）以及与加热器本体（6）热连通设置的一定量的共晶/铋基合金（7） 围绕加热器主体（6）的外表面。 所述工具具有围绕所述合金（7）的外表面设置的套筒（10），所述套筒（10）绝缘和/或机械地保护所述合金（7）的井下。 以这种方式，套筒（10）能够在保持其功能的同时减小工具（5）的直径。 在另一方面，本发明还公开了在化学加热器的管状加热器主体的内壁上设置耐火衬里（20），例如用于共晶/铋基合金井堵塞/密封的加热器（6） 工具（5）。

公开(公告)号：WO2016024122A2

公开(公告)日：2016-02-18

申请号：PCT/GB2015/052347

申请日：2015-08-14

Applicant: BISN TEC LTD

Inventor： CARRAGHER, Paul

IPC: E21B29/10

CPC classification number: E21B33/122 ,  E21B17/042 ,  E21B19/00 ,  E21B29/10 ,  E21B31/007 ,  E21B33/13 ,  E21B33/14 ,  E21B41/00 ,  E21B43/10

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.

Abstract translation: 本发明的第一方面提供一种具有安装在其上的环形封隔器的气井或油井管，其中环形封隔器由共晶合金形成。 通过将环形封隔器预制在管道上，可以从一开始就将其置于原位，因此可以随时熔化而有效地快速，容易地形成共晶密封。 还提供了具有旁路管道的环形封隔器，以便当水泥在其原位时被泵送通过环形封隔器。 环形封隔器还设置有用于从导管内清除水泥的导管间隙装置。

公开(公告)号：WO2023084220A1

公开(公告)日：2023-05-19

申请号：PCT/GB2022/052850

申请日：2022-11-10

Applicant: BISN TEC LTD

Inventor： LEVCHENKO, Andre ,  CHANCELLOR, Bobby ,  NAYLOR, Matthew ,  CLARK, Billy ,  TALAPATRA, Didhiti ,  CARRAGHER, Paul ,  MOODY, Mike

IPC: E21B29/02 ,  E21B33/12 ,  E21B33/134 ,  E21B36/00 ,  E21B23/04

Abstract: The present invention relates to downhole tool assemblies (50) for use in deploying an alloy plug (61) or seal within a target region of an oil/gas well and clearing/removing well structures from said target regions. The assemblies are provided with a gas-generating chemical heating mixture (58, 59, 60). The heat generated by the chemical heating mixture is employed in heating a downhole target region, while the gas generated is harness to actuate the operation of one or more functional components (54) provided on the assembly to achieve the assembly's particular downhole operation.

公开(公告)号：WO2016024123A1

公开(公告)日：2016-02-18

申请号：PCT/GB2015/052348

申请日：2015-08-14

Applicant: BISN TEC LTD

Inventor： CARRAGHER, Paul

IPC: E21B29/10 ,  E21B33/138

CPC classification number: E21B33/122 ,  E21B17/042 ,  E21B19/00 ,  E21B29/10 ,  E21B31/007 ,  E21B33/13 ,  E21B33/14 ,  E21B41/00 ,  E21B43/10

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.

Abstract translation: 提供了一种用于气井或油井的井下工具。 该工具包括具有安装在其外表面上的至少一个环形密封装置的一段管道。 由共晶/铋基合金形成的环形密封装置用于将井下工具固定在油井或气井内的适当位置，使得工具能够执行其功能。

公开(公告)号：WO2015150828A2

公开(公告)日：2015-10-08

申请号：PCT/GB2015/051045

申请日：2015-04-02

Applicant: BISN TEC LTD

Inventor： CARRAGHER, Paul

CPC classification number: E21B33/138 ,  E21B29/02 ,  E21B29/10 ,  E21B33/16 ,  E21B36/001 ,  E21B36/003 ,  E21B36/008 ,  E21B37/00

Abstract: A method of clearing well casing or tubing from a target region of an oil/gas well borehole is provided. The clearance of the oil/gas well bore hole being achieved by employing chemical agents that consume, weaken or melt the well casing/tubing. In some aspects of the method the well casing is cleared to expose the rock formation within which the well borehole is formed so that the rock formation can be accessed from within the well casing/tubing. In other aspects of the method the removal of inner tubing structures is used to facilitate the unimpaired deployment of repair tools down the well borehole.

Abstract translation: 提供了一种从油/井井眼的目标区域清除井套管或管道的方法。 通过使用消耗，削弱或熔化井套管的化学试剂来实现油/气井孔的清除。 在该方法的一些方面，井壳被清除以暴露形成井眼的岩层，从而可以从井套管内进入岩层。 在该方法的其他方面，使用内部管道结构的移除来促进维修工具在井眼下的未受损部署。

公开(公告)号：WO2014096857A3

公开(公告)日：2014-06-26

申请号：PCT/GB2013/053396

申请日：2013-12-20

Applicant: BISN TEC LTD

Inventor： CARRAGHER, Paul

IPC: E21B36/00 ,  E21B33/134 ,  C22C12/00 ,  E21B33/136 ,  E21B17/10

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.

公开(公告)号：WO2021260442A1

公开(公告)日：2021-12-30

申请号：PCT/IB2021/000504

申请日：2021-06-22

Applicant: BISN TEC LTD.

Inventor： CARRAGHER, Paul ,  LEVCHENKO, Andre ,  CLARK, Billy ,  UNDERWOOD, Lance

IPC: E21B33/12 ,  E21B33/13 ,  E21B36/00 ,  E21B33/1208

Abstract: 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：WO2019097252A3

公开(公告)日：2019-05-23

申请号：PCT/GB2018/053333

申请日：2018-11-16

Applicant: BISN TEC LTD

Inventor： CARRAGHER, Paul

IPC: E21B33/12 ,  E21B43/10 ,  E21B36/00

Abstract: The present invention provides a method of deploying a eutectic alloy based tool within an oil/gas well. The method comprising providing a eutectic alloy based downhole tool comprising a tubular body with eutectic alloy located on an outer surface thereof, said tool having an outer diameter with a clearance from the inner diameter of the well. The downhole tool is delivered to a target region within an oil/gas well where the tool is to be deployed. Once the tool is in position within the well a tubular expanding tool is run through the interior of the tubular body so as to increase the outer diameter of the sealing downhole tool and in so doing reduce the clearance between the alloy and the well. Following the expansion of the tubular body a heater is deployed within the tubular body proximal to the alloy and operated to melt the alloy. The alloy is then allowed to cool and resolidfy, whereby the tool is sealed in place within the target region of the well using the alloy.

公开(公告)号：WO2018185482A1

公开(公告)日：2018-10-11

申请号：PCT/GB2018/050909

申请日：2018-04-04

Applicant: BiSN TEC LTD

Inventor： CARRAGHER, Paul ,  BEDOUET, Sylvain

IPC: E21B33/12 ,  C22C12/00 ,  E21B33/138 ,  E21B36/00

CPC classification number: E21B36/00 ,  C22C12/00 ,  E21B29/10 ,  E21B33/12 ,  E21B33/1208 ,  E21B33/1212 ,  E21B33/138

Abstract: 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：WO2017203247A1

公开(公告)日：2017-11-30

申请号：PCT/GB2017/051457

申请日：2017-05-24

Applicant: BISN TEC LTD

Inventor： CARRAGHER, Paul ,  BEDOUET, Sylvain

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

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.

Abstract translation: 本发明提供了一种用于井下作业的化学加热器，以及用于在油井中操作的方法。 化学加热器包括容纳化学反应热源材料（2）的加热器主体（1）。 加热器本体（1）具有在使用中首先在井下部署的前端。 加热器设置有位于加热器主体前端附近的加热区中的点火装置（3），用于触发位于加热区（4,4a）中的化学反应热源材料中的化学反应。 加热器还设置有容纳在加热器主体（1）内的致动器（5,6），并且该致动器构造成将化学反应热源材料（2）推向加热区以产生聚焦加热模式。