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System for Dispensing Abrasive Particles in a Liquid Jet Apparatus

Inactive Publication Date: 2014-09-11
CHUKAR WATERJET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention allows for cutting and surface modification at submerged locations deep underwater using a liquid jet tool that is portable and can be operated by a human diver or an ROV. An abrasive suspension can also be portably supplied to enhance the effectiveness of the liquid jet tool. The abrasive suspension may be directly drawn into the tool's discharge chamber as a result of a reduced pressure created by the passage of highly pressurized raw working liquid out from the tool. The patent text describes a method of dispensing the abrasive suspension which includes providing a storage vessel containing the suspension and connecting it to the liquid jet tool's chamber through a fluid connection. This is effective to draw the abrasive suspension into the tool's chamber, where it can be used in the cutting and surface modification processes.

Problems solved by technology

Such systems, however, may be prone to clogging and other delivery problems, and further require gas pressurization systems to propel the abrasive particles through the abrasive delivery conduits.
Such conventional approach limits the applicability of liquid jet apparatus in cutting and surface treating work pieces in the field where large reservoirs.

Method used

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  • System for Dispensing Abrasive Particles in a Liquid Jet Apparatus
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  • System for Dispensing Abrasive Particles in a Liquid Jet Apparatus

Examples

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example 1

[0095]A batch of abrasive suspension was prepared by pre-mixing 50 pounds of aluminum oxide with 75 grams of xanthan gum and 1350 grams of bentonite clay. Six gallons of fresh water was slowly added to the dry mix under constant stirring. The mixture was further stirred until a uniform dispersion was formed.

[0096]The abrasive suspension was poured into a storage vessel as described above to completely fill the vessel, with an aluminum foil cap being induction sealed at the spout outlet. A tube having a diameter of between a-10 and a-20, and a length of less than about 5 meters was connected to a water jet nozzle with a specific orifice to control the flow rate of the abrasive suspension. Operating the ultra high pressure liquid jet tool generates a low pressure environment sufficient to draw the abrasive suspension out from the storage vessel at a constant rate when the aluminum foil seal is broken, and the contents of the storage vessel are fluidly connected to a portion of the liq...

example 2

[0098]A batch of abrasive suspension was prepared by pre-mixing 5.7 kg of aluminum oxide with 16 g of xanthan gum, 325 g of bentonite clay, and 110 g of lignosulfonate. 5.7 kg of fresh water was slowly added to the dry mix under constant stirring until a uniform dispersion was formed.

[0099]Other blends of these components were prepared in the following concentration ranges:

ComponentWeight Range (kg)Aluminum Oxide 5.7-11.3Water4.5-5.7Bentonite Clay0.33Lignosulfonates0.11-0.33Xanthan Gum0.016-0.038

[0100]The abrasive suspension prepared from these components were flowable through a 6 mm inner diameter tube with a 2.5 m length while running the jet tool head pressure at about 65-70 Kpsi.

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Abstract

A submersible liquid jet apparatus is provided for a system with a portable liquid jet tool that may be handled by human divers or remotely operated vehicles (ROV). The present apparatus facilitates the portability of a liquid jet tool with a support unit supplying high pressure working liquid and pressurized hydraulic fluid. The apparatus further provides portable delivery of an abrasive suspension to enhance the effectiveness of the high pressure working liquid.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part of U.S. Non-provisional application Ser. No. 13 / 872,943, filed on Apr. 29, 2013 and entitled “SUBMERSIBLE LIQUID JET APPARTUS”, which itself claims priority to U.S. Provisional Patent Application Ser. No. 61 / 639,592, filed on Apr. 27, 2012 and entitled “SYSTEM FOR DISPENSING ABRASIVE SUSPENSION IN A LIQUID JET APPARATUS,” the contents of which being incorporated herein in their entirety.FIELD OF THE INVENTION[0002]The present invention relates to liquid jet cutting and surface modification apparatus generally, and more particularly to an abrasive and abrasive delivery system for such liquid jet apparatus, as well as a deployment system for subsea application of such liquid jet apparatus. The present arrangement facilitates the introduction of abrasive particles into the ultra high pressure liquid forming the liquid jet, and specifically a system that facilitates portability of the liquid jet tool...

Claims

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Application Information

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IPC IPC(8): B24C7/00B24C3/32
CPCB24C3/32B24C7/0007
Inventor KIVISTO, BRUCESINGH, AMANDEEPBEKKALA, GORDON A.LAGUE, JUDE J.
Owner CHUKAR WATERJET
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