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Expandable Jet perforating tools

IP.com Disclosure Number: IPCOM000234996D
Publication Date: 2014-Feb-21
Document File: 2 page(s) / 25K

Publishing Venue

The IP.com Prior Art Database

Abstract

This document describes the idea to develop a Coiled Tubing abrasive perforating system with the ability to change the outside diameter during the different phases of the treatment. Specifically the tools will expand during the blasting operation and will shrink during descent and retrieval

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Expandable Jet perforating tools

Introduction

This document describes the idea to develop a Coiled Tubing abrasive perforating system with the ability to change the outside diameter during the different phases of the treatment. Specifically the tools will expand during the blasting operation and will shrink during descent and retrieval.

The ability to expand and retract in a controlled manner will allow the use of abrasive perforating technology in a well completed with "small" production tubing (small restriction) and a "big" casing or liner (i.e expansion ratio's of 3:1).

Prior Art

The wells are normally perforated using conventional wireline run explosive guns. The pressure generated by the perforating guns connects the borehole with the formation by creating a tunnel through the casing, cement and formation. The pressure generated in the formation creates the perforation channel compressing the rock. The compressed rock is called a crashed zone. In this area the permeability is drastically reduced. This is a well known damaging mechanism associated with the conventional perforation technique.

Recently several service companies re-propose an old alternative perforation technique. This technique uses the idea of perforating the well by blasting sand slurry at high pressure. The jet slowly erodes the completion and pipe creating a channel in the formation. This technology leaves a clean channel without any crashed/damaged zone.

Jet technology is widely used and proven for perforation before frac and in some case has been used to perforate for production. One of perforating jetting technology limits is the tools diameter. Typical abrasive jet tool size...