Downhole Tool Centralizing Pistons

a technology of centralizing pistons and downhole tools, applied in the field of pistons, can solve problems such as incompatibility of seals

Inactive Publication Date: 2014-06-26
SCHLUMBERGER TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a system for centralizing downhole tools in wellbores using pistons with rollers or other features to position the tool correctly. The pistons can be used to establish fluid communication with the formation surrounding the wellbore for testing and sampling purposes. The system can include a wellsite rig and drill string for advancing the downhole tool into the formation. The technical effect of the patent is to provide a more effective and reliable method for positioning downhole tools in wellbores, which can improve the accuracy of wellbore construction and evaluation.

Problems solved by technology

However, the inability to centralize the downhole tool in the wellbore may result in an incomplete seal.

Method used

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  • Downhole Tool Centralizing Pistons
  • Downhole Tool Centralizing Pistons
  • Downhole Tool Centralizing Pistons

Examples

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Embodiment Construction

[0015]It is to be understood that the present 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.

[0016]The present disclosure is directed to pistons that may be employed to centralize downhole tools within a wellbore. According to certain embodiments, the pistons may include rollers designed to centralize the tool within the wellbore. For example, the rollers may include wheels designed to roll along the circumference of the wellbore wall to centralize the tool along a longitudinal axis of the wellbore. In certain embodiments, the downhole tool may pivot around a probe extended toward an opposite side of the wellbore from the centralizing pistons.

[0017]FIGS. 1 and 2 depict examples of wellsite systems that may employ the centralizing pist...

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Abstract

The present disclosure is directed to setting pistons designed to centralize downhole tools within a wellbore. In one embodiment, a downhole tool includes a probe extendable to engage a wall of a wellbore and a setting piston extendable towards the wall of the wellbore. A roller is coupled to the setting piston and designed to roll circumferentially along the wall to pivot the downhole tool within the wellbore.

Description

BACKGROUND OF THE DISCLOSURE[0001]The disclosure relates generally to pistons that may be employed in downhole tools to position the downhole tools within a wellbore.[0002]Wellbores (also known as boreholes) are drilled to penetrate subterranean formations for hydrocarbon prospecting and production. During drilling operations, evaluations may be performed on the subterranean formation for various purposes, such as to locate hydrocarbon-producing formations and manage the production of hydrocarbons from these formations. To conduct formation evaluations, the drill string may include one or more drilling tools that test and / or sample the surrounding formation, or the drill string may be removed from the wellbore, and a wireline tool may be deployed into the wellbore to test and / or sample the formation. These drilling tools and wireline tools, as well as other wellbore tools conveyed on coiled tubing, slick line, drillpipe, casing or other conveyers, are also referred to herein as “dow...

Claims

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Application Information

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IPC IPC(8): E21B23/01
CPCE21B49/10E21B17/1014
InventorHARRIGAN, EDWARD
OwnerSCHLUMBERGER TECH CORP