Self Venting Setting Tool That Utilizes Wellbore Fluid to Dampen Setting Motion

Abstract

A setting tool for setting a device within a wellbore. The setting tool includes first and second chambers within a housing. A piston separates the chambers and is moveable within the second chamber. The piston is initially positioned adjacent a first end of the second chamber. The setting tool includes a first aperture in communication with the second chamber. Wellbore fluid may enter the second chamber through the first aperture. As the piston moves towards the second end of the second chamber, wellbore fluid within the second chamber is forced out of the second chamber through the first aperture. Pressure within the first chamber vents from the first chamber through the first aperture when the piston moves past the first aperture within the second chamber. The housing may include a second aperture adjacent to the second end of the second chamber that permits wellbore fluid to enter and exit.

Description

BACKGROUNDField of the Disclosure[0001]The embodiments described herein relate to apparatuses, systems, and methods for damping the movement of a piston within a setting tool with wellbore fluid and venting the pressure created by the detonation of a power charge within the setting tool.Description of the Related Art[0002]A downhole setting tool may use a power charge to set a device within a wellbore. The power charge is detonated to generate the force required to set the device. For example, the force from the detonated power charge may move a piston causing the setting of the device. The power charge of the downhole setting tool may be used to set various devices in a wellbore as would be appreciated by one of ordinary skill in the art. For example, a downhole setting tool with a power charge may be used to set bridge plugs, cement retainers, packers, and various other downhole devices.[0003]The force created by the detonation of the power charge can be significant. Present downh...

AI Technical Summary

Benefits of technology

The patent describes a method for setting a device in a wellbore using a setting tool. The tool has two chambers separated by a piston. The tool has an aperture that allows fluid to enter the second chamber and move the piston. The process involves moving the piston to set the device and then venting the first chamber as the piston moves. This method helps to control the movement of the piston and ensures the device is set safely and securely in the wellbore.

Problems solved by technology

Another issue with downhole setting tools is the venting of the pressure within the setting tool after the detonation of the power charge.

It is undesirable to bring a downhole setting tool to the surface with pressure from the detonation of the power charge still contained within a portion of the setting tool.

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