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Control Line Isoltion and Protection System for Intelligent Well Operations

IP.com Disclosure Number: IPCOM000201800D
Publication Date: 2010-Nov-23
Document File: 5 page(s) / 409K

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The IP.com Prior Art Database

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033640: OTHER

Abstract

The “Filler Strip” is a length of properly suited material with a cross section that would include a slot used to retain the tubing while the surrounding material fills the bypass slot. Two flanges are used to help retain and position the filler strip and divert fluid flow. In areas that are not subject to violent flow , or where the flanges would not have an opposing surface to control flow, the filler strip may be used without the flanges. In this application the primary function is protection of the lines from direct flow and preventing metal to metal contact from occurring with other lines or the tool body. The strips are easily attached and can be retro-fitted and or replaced, to existing equipment with minimal or no modification to the tool.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 53% of the total text.

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033640

CONTROL LINE ISOLATION AND PROTECTION SYSTEM FOR "INTELLIGENT WELL" APPLICATIONS

(SUMMARY)

The recent failure of control lines on a high rate gas injection well, has resulted in the need to

minimize the potential damage that can occur from vibration and erosion to the control lines, and

thereby increase the life & reliability of an "intelligent" well completion.

While the control lines are protected within grooves (bypass slots) on the sides of the tool,

potentially high flow velocities in the deflector area can cause flow through the bypass slots and

cause vibration and eventually erode the control lines.

Injection rates of 25,000 bpd over a 3 week period at 1500 psi differential creates enough damage to

the control lines to lead to control line failure and costly downtime.

The photo below shows an electrical I-wire line damaged as a result of high energy flow causing erosion & vibration.

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The photo below shows damage to the valve body as a result of the control line vibration.

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(ANALYSIS)

Extensive testing was done to simulate these conditions and CFD (Computational Fluid Dynamics)

analysis was used to simulate potential wear and flow characteristics. Potentially high flow velocities

in the deflector area can erode the valve body leading into the bypass slot and eventually eroding the

control line. The CFD model shown below illustrates swirl patterns/ vortexes along the valve O.D.

that can cause potential erosion.

The CFD model also shows that a substantial flow is pushed through the grooves, bypassing the

control lines. This flow and the vortexes seen in the model, cause substantial high frequency

vibration in the control lines.

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(SOLUTION )

The "Filler Strip" is a length of properly suited material with a cross section that would include a slot


used to retain the tubing while the surrounding material fills the bypass slot. Two flanges are used to

help retain and position the fil...