Full Bore Valve for Downhole Use

a full bore, flapper valve technology, applied in the direction of fluid removal, borehole/well accessories, construction, etc., can solve the problems of assembly fouling, time-consuming and costly process, and repeated setting and removal of plugs within the wellbore,

Inactive Publication Date: 2010-08-26
FRAZIER W LYNN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Enables efficient isolation of hydrocarbon intervals with minimal pressure drop and maximum tool passage, reducing operational costs and improving production efficiency by allowing bi-directional fluid communication initially and unidirectional communication when needed.

Problems solved by technology

The repeated setting and removal of plugs within the wellbore is a time consuming and costly process that requiring multiple run-ins to place and remove the one or more downhole plugs and / or tools.
First, the installation of check valves places one or more multi-piece assemblies downhole; these assemblies are prone to fouling by production fluids, potential mechanical failure due to damage from the passage of downhole tools, and / or chemical attack from routine wellbore operations.
Second, the use of a check valve requires a complimentary valve seat disposed within the wellbore, proximate to the check valve.
Constraints within the casing string often require the valve scat to have a smaller diameter or bore than the adjoining casing string, thereby limiting the passage of tools through the check valve and increasing the pressure drop through the tool.

Method used

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  • Full Bore Valve for Downhole Use
  • Full Bore Valve for Downhole Use
  • Full Bore Valve for Downhole Use

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Embodiment Construction

[0032]A detailed description will now be provided. Bach of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the “invention” may in some cases refer to certain specific embodiments only in other cases it will be recognized that references to the “invention” will refer to subject matter recited in one or more, but not necessarily all, of the claims. Each of the inventions will now be described in greater detail below, including specific embodiments, versions and examples, but the inventions are not limited to these embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the inventions, when the information in this patent is combined with available information and technology.

[0033]FIG. 1 depicts a partial cross sectional view of an illust...

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Abstract

Downhole tools and methods for producing hydrocarbons from a wellbore. A downhole tool can include a body having a bore formed therethrough and at least one end adapted to threadably engage one or more tubulars. A sliding sleeve, adapted to move between a first position and a second position within the body, can be at least partially disposed within the body. A valve assembly including a valve member having an arcuate cross section wherein the valve member is adapted to pivot between an open and closed position within the body can be disposed within the body. A valve seat, having an arcuate cross-section adapted to provide a fluid tight seal with the valve member assembly can be disposed within the body.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application having Ser. No. 12 / 130,840, filed on May 30, 2008, which claims priority to U.S. Provisional Patent Application having Ser. No. 61 / 016,323, filed on Dec. 21, 2007, which are both incorporated by reference herein.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]Embodiments of the present invention generally relate to downhole tools and methods for using same. More particularly, embodiments of the present invention relate to a full bore flapper valve for a downhole tool and methods for using same.[0004]2. Description of the Related Art[0005]A wellbore typically penetrates multiple hydrocarbon hearing intervals, each requiring independent perforation and fracturing prior to being placed into production. Multiple plugs are often employed to isolate the individual hydrocarbon bearing intervals, thereby permitting the independent treatment of each interval with minimal...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): E21B34/14E21B34/06
CPCE21B2034/005E21B34/14E21B2200/05
InventorFRAZIER, W. LYNN
OwnerFRAZIER W LYNN