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Method for interconnecting electrical conduits in a borehole

一种电缆导管、钻井的技术，应用在钻管、钻井设备、连接装置的零部件等方向，能够解决损坏供电电缆等问题

Inactive Publication Date: 2006-11-15
SHELL INT RES MAATSCHAPPIJ BV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] International patent application WO 01 / 02699 is known to provide a cable retractable electric submersible pump (ESP) system with wet-joint electrical inserts that allow the retraction of the ESP system and associated electric motor Go to the surface for maintenance, inspection or replacement without pulling the power supply cable to the surface at the same time, this kind of electric submersible pump system often damages the power supply cable during retrieval, so it often needs to be replaced with a new cable

Method used

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  • Method for interconnecting electrical conduits in a borehole

Examples

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Embodiment Construction

[0018] figure 1 Production tubing 1 of a production well is shown, with an electric submersible pump (ESP) system 2 including ESP and motor assemblies suspended from a cable (not shown).

[0019] The movable part 3 of the downhole electrical plug according to the invention is connected to the motor (not shown) of the ESP system 2 and is located directly above the stationary part 4 of the downhole electrical plug according to the invention.

[0020] The stationary plug-in part 4 is installed in the production tubing 1 and fixed to the power supply cable 5, which is suspended in the production tubing 1 and can be powered by a power source (not shown) on the surface .

[0021] The stationary insert part 4 comprises an annular housing 6 in which a central through hole 7 is provided and from which a set of three sleeve parts 8A, 8B and 8C extend upwardly. Each sleeve portion 8A-C is disposed within a sealed chamber 9A-C including an inlet 10A-C in which a seal is provided that pr...

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Abstract

A method for interconnecting electrical conduits in an underground borehole by means of a self-cleaning downhole electrical connector with a static and a moveable connector part (4,3), comprises installing the static connector part (4) within the borehole such that a central throughbore (7) within the static part (4) provides a passage for fluid and debris passage and for access there beneath after retrieval of the moveable connector part (3); and lowering the movable connector part (3) on top of the static connector part (4) such that pairs of electrical contacts (8 and 11A-C) of the static and movable connector parts (4,3) intermesh and fluid and debris is discharged via the central throughbore into the section of the borehole beneath the static connector part. The connector may be used to connect a wireline retrievable electrical submersible pump (ESP) system (2) to an electrical power supply line (5) which may remain in the borehole when the ESP system (2) is retrieved for inspection, repair or replacement.

Description

technical field [0001] The present invention relates to a method for interconnecting electrical cable conduits in a subterranean wellbore and an electric submersible pump (ESP) system utilizing the method to connect to a supply conduit in a downhole location. Background technique [0002] International patent application WO 01 / 02699 is known to provide a cable retractable electric submersible pump (ESP) system with wet-joint electrical inserts that allow the retraction of the ESP system and associated electric motor Going to the surface for maintenance, inspection or replacement without pulling the power supply cable to the surface at the same time, this electric submersible pump system often damages the power supply cable during retrieval, so it often needs to be replaced with a new cable. The wettable electrical connector known from this prior art document comprises axially spaced pairs of electrical contact rings which are concentric in the wellbore and which do not allow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/02H01R13/52H01R13/523
CPCH01R13/5227H01R13/523Y10T29/49174Y10T29/49204Y10T29/49117Y10T29/49195E21B17/0285
Inventor N·格里菲斯
Owner SHELL INT RES MAATSCHAPPIJ BV
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