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Tool and method for locking and releasing a plug

Inactive Publication Date: 2014-08-14
ARCHER OILTOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a tool for locking and releasing a plug in a hydrocarbon well. The tool has a sleeve with a pocket for receiving the plug's pin element, and a locking element that can be moved between a release position and a locking position. The tool is moved in the well to position the pin element in abutment with the locking element, and the locking element is brought into the locking position to lock the plug's pin element. The tool is then used to release the plug by applying fluid pressure to the sleeve-like part, which causes the at least one spring to compress and move the locking element into the release position. The invention provides a simple and effective tool for locking and releasing plugs in hydrocarbon wells.

Problems solved by technology

Plugs are usually set and released by rotation of the drill string, but it can be difficult to achieve controlled rotation at great well depths.
There are several potential sources of error which render the setting and release hazardous.
One such source of error could be left-hand (anti-clockwise) rotation, which may result in equipment such as the drill pipe or plugs being unscrewed from one another.

Method used

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  • Tool and method for locking and releasing a plug
  • Tool and method for locking and releasing a plug
  • Tool and method for locking and releasing a plug

Examples

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Embodiment Construction

[0018]An example of an embodiment of the invention will now be described with reference to the figures, wherein:

[0019]FIG. 1 is a perspective view of a tool coupled to a plug.

[0020]FIGS. 2A-2C show an axial section of the tool in FIG. 1, in the area B, wherein:

[0021]FIG. 2A shows a sleeve on a lower part of the tool where a pin element on a plug is locked to the tool;

[0022]FIG. 2B shows the sleeve on the lower part of the tool, where the locking element is in a release position and the plug's pin element can be released from the tool; and

[0023]FIG. 2C shows the sleeve on the lower part of the tool, where the plug's pin element is in the process of being released from the tool.

[0024]FIGS. 3A and 3B show a section of FIG. 1, in the area A, wherein:

[0025]FIG. 3A shows the tool locked to the plug's pin element;

[0026]FIG. 3B shows the tool when the plug's pin element and the locking element are in a releasing position from the tool.

[0027]FIG. 4A-4H show, step by step, the tool on the way...

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PUM

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Abstract

A tool for locking and releasing a plug in a hydrocarbon well includes a sleeve having at least one pocket for receiving the plug's pin element, and at least one locking element which can be moved between a release position in which the pocket is open, and a locking position in which the pocket is closed.When locking the tool to the plug, the tool is moved in the hydrocarbon well to facilitate positioning of the pin element in abutment with the locking element, further movement bringing the locking element into an open position for receiving the pin element in the pocket, and the locking element is brought into a locking position such that the plug's pin element is locked in the pocket.When releasing the tool from the plug, fluid means are used for movement of the locking element into a release position.

Description

INTRODUCTION[0001]The present invention relates to a tool for locking and releasing a plug in a well, for example, a hydrocarbon well, as specified in the independent apparatus claim. The invention further relates to methods for locking and releasing the plug, as specified in the preamble of the independent method claims.BACKGROUND FOR THE INVENTION[0002]It is usual to use rotation of the drill string when a running tool is to be fastened to or released from a plug in a well. Examples of such solutions can be found, for example, in U.S. Pat. No. 3,509,940 A and US 2008 / 0128132 A1. U.S. Pat. No. 3,509,940 A relates to a well tool that can be reused for retrieving and setting of a plug in a well. The plug has provided at its upper end a transverse bar for retrieving and setting of the plug. The running tool has at its lower end two corresponding “J-slots” for receiving the transverse bar on the plug. The bar is fastened to, and released from, the running tool by rotation.[0003]US 2008...

Claims

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Application Information

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IPC IPC(8): E21B23/04
CPCE21B23/04E21B23/00E21B47/024E21B17/06E21B23/042
Inventor HANSEN, TOR EIVINDKLIMAS, KRZYSZTOF
Owner ARCHER OILTOOLS
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