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Hydraulic Release Feethrough Packer

IP.com Disclosure Number: IPCOM000202941D
Publication Date: 2011-Jan-11
Document File: 4 page(s) / 37K

Publishing Venue

The IP.com Prior Art Database

Abstract

An apparatus configured to isolate an uphole section of a borehole from a downhole section of the borehole, the apparatus having: a seal configured to seal against the borehole to isolate the uphole section from the downhole section; a release mechanism disposed in the borehole and configured to release the seal from sealing; and one or more control lines extending uphole from the release mechanism and configured to provide a hydraulic signal to the release mechanism to release the seal from sealing

This text was extracted from a Microsoft Word document.
This is the abbreviated version, containing approximately 38% of the total text.

HYDRAULIC RELEASE FEEDTHROUGH PACKER

ABSTRACT OF THE DISCLOSURE

An apparatus configured to isolate an uphole section of a borehole from a downhole section of the borehole, the apparatus having: a seal configured to seal against the borehole to isolate the uphole section from the downhole section; a release mechanism disposed in the borehole and configured to release the seal from sealing; and one or more control lines extending uphole from the release mechanism and configured to provide a hydraulic signal to the release mechanism to release the seal from sealing.

DETAILED DESCRIPTION

[0001]   Disclosed are techniques for releasing a packer from the surface of a borehole penetrating the Earth.  The techniques, which include apparatus and method, call for operating a release mechanism using hydraulic pressure transmitted by one or more control lines (i.e., tubing or conduit having an internal flow bore) extending from the packer to the surface of the well.  The control lines can be dedicated to releasing the packer or they can have multiple uses.

[0002]   In one embodiment, the hydraulic pressure is applied directly to the release mechanism from the surface of the well.  In another embodiment, the release mechanism detects a hydraulic signal and then releases the packer.  The hydraulic signal can be applied via one control line (such as a series of pulses) or more than one control line.  In embodiments where the control lines have multiple uses, a selected unique array of hydraulic signals may be applied to the control lines to actuate the release mechanism.  For example, the unique array can have high pressure applied to certain control lines, low pressure applied to other control lines, or a combination thereof.  The unique array is selected so as not to interfere with the other uses associated with the control lines.

[0003]   For convenience, certain definitions are presented.  The term “packer” relates to an apparatus configured to seal an uphole section of a borehole from a downhole section of the borehole.  The term “uphole” relates to the direction leading to the entrance of the borehole.  The term “downhole” relates to the direction leading to the end of the borehole that is being drilled or has been drilled.

[0004]   Reference may now be had to FIG. 1.  FIG. 1 illustrates an exemplary embodiment of a tubular string 4 disposed in a borehole 2 penetrating the Earth 3.  The Earth 3 may in some instances include a geologic formation having a reservoir of hydrocarbons.  To extract the hydrocarbons in such exemplary situation, the tubular string has an internal flow bore.  The borehole 2 in the embodiment of FIG. 1 is lined with a casing 5 to prevent the borehole 2 from collapsing.  Hence, disclosure related to sealing against the borehole 2 inherently includes sealing against the casing 5 when the borehole 2 is cased.

[0005]   Still referring to FIG. 1, a packer 10 is shown disposed in the tubular string 4.  The packer 10...