Multiple Ramp Compression Packer

Abstract

Systems and methods for remotely setting a downhole device. The system includes a base pipe having inner and outer radial surfaces and defining one or more pressure ports extending between the inner and outer radial surfaces. An internal sleeve is arranged against the inner radial surface and slidable between a closed position, where the internal sleeve covers the one or more pressure ports, and an open position, where the one or more pressure ports are exposed to an interior of the base pipe. A trigger housing is disposed about the base pipe and defines an atmospheric chamber in fluid communication with the one or more pressure ports. A piston port cover is disposed within the atmospheric chamber and moveable between blocking and exposed positions. A wellbore device is used to engage and move the internal sleeve into the open position by applying predetermined axial force to the internal sleeve.

Description

BACKGROUND[0001]The present invention relates to systems and methods used in downhole applications and, more particularly, to providing a seal in a casing annulus capable of stopping gas migration.[0002]In the course of treating and preparing a subterranean well for production, downhole tools, such as well packers, are commonly run into the well on a conveyance such as a work string or production tubing. The purpose of the well packer is not only to support the production tubing and other completion equipment, such as sand control assemblies adjacent to a producing formation, but also to seal the annulus between the outside of the production tubing and the inside of the well casing or the well bore itself. As a result, the movement of fluids through the annulus and past the deployed location of the packer is substantially prevented.[0003]Some well packers are designed to be set using complex electronics that often fail or may otherwise malfunction in the presence of corrosive and / or...

AI Technical Summary

Benefits of technology

The present invention relates to a system and method for sealing a wellbore annulus to prevent gas migration. The system includes a base pipe with an opening seat, a piston, and a wellbore device for engaging and moving the opening seat. The system also includes first and second packer elements and a cavity between them that traps fluid and provides a hydraulic seal. The technical effect of the invention is to provide a reliable and effective seal in the wellbore annulus to prevent gas migration.

Problems solved by technology

While reliable in some applications, these and other methods of setting well packers add additional and unnecessary complexity and cost to the pack off process.

Moreover, these conventional methods for setting the well packer are often only able to seal the annulus up to certain nominal pressures and thereafter are unable to prevent migration of fluids, such as gases, past the set well packer.

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