Installing method and device for tensioning type impressed current device underwater component

A technology of impressed current and installation method, which is applied in the field of installation method and installation device of underwater parts of tension type impressed current device, can solve the problems of lack of installation method and installation device, etc., and achieve safe and controllable lowering installation process and avoid torsion Risk of sabotage, effect of extended service life

Active Publication Date: 2018-02-02
CNOOC TIANJIN BRANCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no precedent for the design and application of tension-type impressed current devices for life extension on CNOOC platforms, so there is also a lack of corresponding installation methods and installation devices

Method used

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  • Installing method and device for tensioning type impressed current device underwater component
  • Installing method and device for tensioning type impressed current device underwater component
  • Installing method and device for tensioning type impressed current device underwater component

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings. However, it should be understood that the accompanying drawings are provided only for better understanding of the present invention, and they should not be construed as limiting the present invention.

[0018] Such as Figure 1~5 As shown, the installation device for underwater parts of the tension type impressed current device provided by the present invention includes a first cable winch 1, a second cable winch 2, a first fixed pulley 3, a second fixed pulley 4, a movable pulley 5, and a triangular hole Plate 6 and ROV (Underwater Robot) shackle 7.

[0019] The first cable winch 1 and the second cable winch 2 are fixedly arranged on the bottom deck of the offshore platform, between the first cable winch 1 and the second cable winch 2, and the bottom roof of the offshore platform is provided with a composite cable tension point 8, and The projection position of the ...

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Abstract

The invention relates to an installing method and device for a tensioning type impressed current device underwater component. The installing method is characterized by comprising the following steps that firstly, a gravity foundation and a cable roller around which a composite cable is wound are placed on an offshore platform bottom layer deck, and a triangular plate is hooked to an offshore platform bottom layer top plate; secondly, a traction rope of a first cable winch penetrates a first fixed pulley and is connected with the triangular hole plate through a movable pulley, and the movable pulley is fixedly connected with the gravity foundation; thirdly, the first cable winch is started, the gravity foundation is lowered to the designed position of the seabed position, and a traction rope of a second cable winch penetrates a second fixed pulley and is connected with the triangular hole plate; fourthly, the second cable winch is started, the triangular hole plate disengages from the offshore platform bottom layer top plate, and the triangular hole plate is connected with an auxiliary cable at one end of the composite cable; fifthly, the first cable winch is started, the compositecable is lowered, and the composite cable is connected with the gravity foundation; and sixthly, the other end of the composite cable is arranged at the stretching point of the composite cable. The installing method and device can be widely applied to the field of offshore oil platforms.

Description

technical field [0001] The invention relates to an installation method and an installation device of a tension type applied current device, in particular to an installation method and an installation device of an underwater component of a tension type applied current device. Background technique [0002] At present, many offshore platforms in China have reached the late stage of service and need to extend their service life. The method of adding impressed current cathodic protection devices to existing platforms is usually used to protect the offshore platform jacket and extend the service life of offshore platforms. Impressed current methods for life extension can generally be divided into two methods: remote anode type and tension type impressed current method. Due to the special structure of the gravity foundation on the bed and the composite cable between the gravity foundation and the offshore platform, the composite cable may have risks such as rotation, entanglement, ...

Claims

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Application Information

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IPC IPC(8): C23F13/20
CPCC23F13/20
Inventor 李志刚贾旭余晓毅常炜黄一宋世德刘磊
Owner CNOOC TIANJIN BRANCH
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