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Annular Blowout Container (ABOC)

a technology of blowout container and bladder, which is applied in the field of valves, can solve the problems of over-complexity of existing bops, and achieve the effect of facilitating the force with which the bladder constricts against the tube and increasing the pressur

Inactive Publication Date: 2014-09-18
BAKER DWIGHT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a new type of blowout preventer (BOP) for use in drilling oil wells that is designed to prevent pressure spikes and leaks during drilling. The BOP uses a flexible bladder that can be tightly sealed against the drill string with a high-pressure seal. The top and bottom rotator plates move in opposite directions to twist and constrict the bladder to a full grip and seal. The flexible bladder can seal around irregular components on the drill string without sacrificing the tightness of the seal. The quick rotator action of the rotator plates allows for quick response times to stop the pressure spikes. The hydraulic oil in the bladder is compressed as the piston mechanisms move up, increasing the pressure on the bladder and further facilitating its constriction against the tube or pipe. This new BOP is simpler and more effective in preventing leaks and spikes during drilling operations.

Problems solved by technology

These existing BOPs are generally overly complex and rely on the rig as a source for hydraulic oil pressure to activate.

Method used

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  • Annular Blowout Container (ABOC)
  • Annular Blowout Container (ABOC)
  • Annular Blowout Container (ABOC)

Examples

Experimental program
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Embodiment Construction

[0025]Reference is made first to FIG. 1 for a detailed description of the internal structures of the ABOC device of the present invention. Annular blowout container 10 shown in cross-section in FIG. 1 is constructed primarily of top section body 12 and bottom section body 14. Top connector flange 16 connects the ABOC to the upper wellhead assembly (the balance of the components) and bottom connector flange 19 attaches the ABOC to the lower wellhead assembly 20. Various secure means for connecting top section body 12 to bottom section body 14, such as the use of a radial array of tapered bolts, may be implemented.

[0026]A section of drill pipe 22 is shown positioned within the ABOC central bore, although it will be recognized that the tubular component within the bore may be drill pipe or production tubing. Positioned within top section body 12 is top drive assembly 24 which incorporates top drive motor 26. This drive assembly serves to rotate the top rotator disc 34 as described in m...

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PUM

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Abstract

An annular blowout container (ABOC) that may be used in multiples in a stack in conjunction with additional gate and shear valves to protect a wellhead. The ABOC incorporates a cylindrical formed bladder that provides a tight constrictive seal around whatever pipe or tubing may be in the well bore. The bladder is made of top and bottom rotator plates with springs extending between the plates. The springs are encased in Teflon® and held in place by Kevlar® then covered over completely with cured Viton® that is injected to complete the overall bladder in a molded form. Rotation of the top and bottom rotator plates effects a twisting constriction around the drill pipe or tubing. Electrical and hydraulic operational components are housed inside chambers within the ABOC for predominantly self-contained operation. The cylindrical bladder assembly may be removed and replaced after extended use.

Description

CROSS REFERENCES TO RELATED APPLICATIONS[0001]This application claims the benefit under Title 35 United States Code §119(e) of U.S. Provisional Application 61 / 765,895 filed Feb. 18, 2013 the full disclosure of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates generally to valves, and more particularly, but not by way of limitation, to a constriction valve for controlling the flow of fluids from a well, especially during uncontrolled well blowouts. The present invention more specifically relates to devices for constricting around and closing off the annular flow volume surrounding a pipe or tubing present in a well. The present invention may therefore be described as an annular blowout container (ABOC) and therefore relates to an improved constriction valve for controlling the flow of drilling fluids and hydrocarbon fluids and gases in a state of free flow known as blowout in drilling and production...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B33/06
CPCE21B33/06E21B33/085
Inventor BAKER, DWIGHT
Owner BAKER DWIGHT