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Method And Apparatus For Tool Retrieval

Inactive Publication Date: 2015-05-28
SCHLUMBERGER TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent is about a method and apparatus for fishing and retrieving tools that become lodged in wellbores during drilling and wellbore operations. The patent describes various tools and techniques for engaging and dislodging these tools, including the use of overshots and fishing tools. The technical effects of the patent include improving the efficiency and safety of fishing operations, reducing the time and cost of wellbore operations, and preventing damage to equipment and personnel.

Problems solved by technology

During these operations, a downhole tool may become lodged in the wellbore or disconnected from its conveyance.

Method used

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  • Method And Apparatus For Tool Retrieval
  • Method And Apparatus For Tool Retrieval
  • Method And Apparatus For Tool Retrieval

Examples

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Embodiment Construction

[0013]It is to be understood that the following disclosure provides many different embodiments, or examples, for implementing different features of various embodiments. Specific examples of components and arrangements are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting. In addition, the present disclosure may repeat reference numerals and / or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and / or configurations discussed. Moreover, the formation of a first feature over or on a second feature in the description that follows may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features may be formed interposing the first and second features, such that the first and second features may not be in d...

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PUM

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Abstract

The present disclosure is directed towards, in general, retrieval tools operable for conveyance within a wellbore extending below a wellsite surface, and methods of using such retrieval tools. One such retrieval tool comprises an annular member operable to receive a conveyance terminating at a downhole tool lodged within the wellbore. The annular member may subsequently receive and engage a portion of the downhole tool. The retrieval tool also comprises a flapper selectively operable to sever the conveyance if the downhole tool cannot be dislodged from the wellbore.

Description

BACKGROUND OF THE DISCLOSURE[0001]In a variety of well-related operations, downhole tools are utilized to carry out desired tasks at downhole locations. For example, different types of downhole tools may be utilized to drill wellbores, deploy tubing and other equipment downhole, perform testing operations, and conduct servicing operations, among other possibilities. During these operations, a downhole tool may become lodged in the wellbore or disconnected from its conveyance. The lodged tool may be referred to as a fish, and a fishing operation may be performed in an attempt to retrieve the fish. For example, a fishing tool may be deployed downhole from a surface rig or platform. The fishing tool comprises a latching or attachment end intended to engage the fish to be retrieved. If the fish cannot be dislodged from the wellbore, the fishing tool is removed from the well. Another downhole tool may then be deployed to separate the fish from its conveyance, such that the conveyance may...

Claims

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Application Information

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IPC IPC(8): E21B23/14E21B29/04E21B31/00
CPCE21B23/14E21B29/04E21B31/00E21B31/12
Inventor COOPER, LARRY VICTORRAMSEY, ROBERT M.
Owner SCHLUMBERGER TECH CORP