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Non-Ballistic Positive Displacement Dump Bailer

IP.com Disclosure Number: IPCOM000240588D
Publication Date: 2015-Feb-10
Document File: 2 page(s) / 259K

Publishing Venue

The IP.com Prior Art Database

Abstract

An apparatus for setting material into a zone of interest within a wellbore. The apparatus comprising of an electrically actuated hydraulic release mechanism.

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INR4-55890

Title:

Non-Ballistic Positive Displacement Dump Bailer

Abstract:

An apparatus for setting material into a zone of interest within a wellbore.  The apparatus comprising of an electrically actuated hydraulic release mechanism.

Description:

The dump bailer functions by use of an atmospheric chamber with a piston and rod contained therein.  This piston/rod is held in place by hydrostatic pressure and/or a shear device such as a shear screw.  Attached to the bottom end of the rod is a weight and a swab but piston.  The lower portion of the rod resides in a chamber open to hydrostatic pressure.  The dump media, usually (but not limited to) cement is inserted into the lower chamber (cargo housing) through a fill-up port near the swab cup piston.  The media is held inside the chamber by means of a lower piston.  This lower piston is held in place by a shear device.  An exit port for the media is just below this lower piston.  The dump bailer is activated by opening the atmospheric chamber to hydrostatic pressure through a trigger device at the top of the dump bailer.  Hydrostatic pressure would push the piston, and thus the rod, shearing the device holding the rod in place.  The rod would move down, causing the swab cup piston to push the media into the bottom piston, shearing the device, and opening the exit port for the dump media.  The weighted piston would continue to push media out the port until the swab cup piston reached the port.