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Instant Packer Using Swell Rubber

IP.com Disclosure Number: IPCOM000200462D
Publication Date: 2010-Oct-14
Document File: 3 page(s) / 21K

Publishing Venue

The IP.com Prior Art Database

Abstract

The general idea is to use tubing or coiled tubing to pump a liquid / swellable rubber / filler material mixture into the annulus area of a production string. Once in place the swellable rubber swells and seals off the annulus area thus creating a "packer" between the casing and the production tubing. In addition the swellable rubber may be positively or negatively buoyant to assist in the placement.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 58% of the total text.

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Abstract:

The general idea is to use tubing or coiled tubing to pump a liquid / swellable rubber / filler material mixture into the annulus area of a production string. Once in place the swellable rubber swells and seals off the annulus area thus creating a "packer" between the casing and the production tubing. In addition the swellable rubber may be positively or negatively buoyant to assist in the placement.

Introduction:

Packers are typically placed in well in order to separate production zones or in the single packer configuration to force production up the production tubing. Packers are currently made up as part of the production tubing and are run in the well along with the production tubing. Having a means to install a packer into a well after the production string is in place has a number of applications.

Applications of this design:

Examples of these applications are ---

A) Placement of a packer using an existing well feature ---


In this configuration, an existing structure in a production string is used to facilitate the placement of the swell packer.

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1. An existing structure in the well fits close to the ID of the casing. For example a large diameter subsurface safety valve, landing nipple, sliding sleeve, etc. could be used as an existing structure.
2. The tubing is perforated below the structure.
3. Phenolic or plastic balls are pumped through the perforations followed by swell rubber balls. Note: The balls are buoyant and large enough not to pass by the structure.
4. The rubber swells and forms a packer.
5. The tubing is patched.

Instant Packer Using Swell Rubber



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B) Repair an existing packer or multilateral junction.

The technique is the same as the one above but the flow return path is downward so buoyancy might be required to lift the balls out of the flow path.
C) Between existing structures ---


The liquid return path may be upward, downward or both.

D) Tubing only instant packer (open hole or with casing).

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1. Tubing is perforated with little holes on one side and large holes on the other.
2....