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Using a Modified API RP 19B Section IV Laboratory to Test Hydrajetting

IP.com Disclosure Number: IPCOM000186007D
Publication Date: 2009-Aug-05
Document File: 8 page(s) / 573K

Publishing Venue

The IP.com Prior Art Database

Abstract

This manuscript describes testing simulated hydrajetting at near down hole conditions. The flow laboratory simulates downhole conditions by controlling overburden, pore, and wellbore pressure independently and it also utilizes a simulated casing coupon and a layer of cement. The test provides a means of evaluating the hydrajetting process, the casing hole and cavity depth, cavity volume, and cavity geometry under pressure conditions. All previous testing was carried out at surface conditions without overburden, pore, or wellbore pressure.

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Using a Modified API RP 19B Section IV Laboratory to

Test Hydrajetting

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Table of Contents

Using a Modified API RP 19B Section IV Laboratory to Test Hydrajetting ..................................... 1 
Abstract ............................................................................................................................................ 3 
Past Hydrajetting Testing ................................................................................................................ 3 
Description ....................................................................................................................................... 3 
Procedures ...................................................................................................................................... 6

Figure 1 Wellbore cap with nozzle assembly .................................................................................. 3

Figure 2 Drawings of hydrajetting fixtures ....................................................................................... 4

Figure 3 Standard Section IV flow diagram ..................................................................................... 5

Figure 4 Hyrajetting flow diagram .................................................................................................... 6

Figure 5 Field equipment used in the hydrajetting test ................................................................... 8

Figure 6 Core hole (left) and casing coupon hole (right) ................................................................. 8

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Abstract

This manuscript describes testing simulated hydrajetting at near down hole conditions. The flow laboratory simulates downhole conditions by controlling overburden, pore, and wellbore pressure independently and it also utilizes a simulated casing coupon and a layer of cement. The test provides a means of evaluating the hydrajetting process, the casing hole and cavity depth, cavity volume, and cavity geometry under pressure conditions. All previous testing was carried out at surface conditions without overburden, pore, or wellbore pressure.

Past Hydrajetting Testing

In the past, hydrajet testing utilized small scale sand slurry blasting or full size jetting. All the tests were carried out at surface conditions.

Description

The standard test fixture used to perforate at downhole conditions was modified to house a hydrajetting nozzle. Figure 1 below shows the modified wellbore cap with the nozzle assembly coming out the bottom and a close-up view of the fixture built to house the nozzle in place.

Figure 1. Wellbore cap with nozzle assembly

The nozzle assembly also contained a perforated centralizer. The centralizer kept the nozzle from moving side-to-side during the high pressure jetting process; yet allowed the jetti...