Browse Prior Art Database

Hydra Jetting Tools and Services

IP.com Disclosure Number: IPCOM000125491D
Publication Date: 2005-Jun-03
Document File: 9 page(s) / 288K

Publishing Venue

The IP.com Prior Art Database

Abstract

The following improvements to hydra jetting tools and processes are disclosed. A flexible swivel to conform to irregularities in the wellbore thus directing the jetting nozzles in the desired direction. A multiple stage hydra jetting tool using a ball to shift a sleeve to close one set of jets and open another set of jets when the first set becomes eroded. A restriction device or seat having an orientation profile for anchoring the hydra jetting tool during jetting. A cup packer having a taper and using a mandrel to flare the cup.

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Hydra Jetting Tools and Services

Hydra Jetting or hydrojetting is a process used in the oil field for numerous applications such as1;

1. Cutting casing or tubing
2. Cutting perforations or slots
3. Cleaning scale or cement from the well
4. Controlling the placement of acid treatments
5. Controlling the placement of fractures

Typically to hydra-jet in a wellbore, a nozzle or nozzles are mounted in the bottom hole assembly to create a high velocity stream of fluid. The fluid can be liquid such as water, oil, gels, foams, or gas. To improve the cutting efficiency abrasives such as sand, proppant, or other particulates can be added to the fluid.

The following are just a few of the many patents that use hydra jetting as a technology in the invention.

US Patent 1,695,749 teaches the use of hydra jetting for cleaning casing.

US Patent 2,302,567 teaches the use of hydra jetting to cut perforations in a wellbore.

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US Patent 5,765,642 teaches the use of hydra jetting to create fractures adjacent to hydra jetting tool.

US Patent 5,765,642

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Other Tool and Methods patent using Hydra Jetting in Oil Field related work

US Patent 5,499,678 - Coplanar Angular Jetting Head for well Perforating US Patent 5,494,103 - Well Jetting Apparatus US Patent 5,296,957 - Well Completions with Expandable Casing Portions US Patent 5,396,805 - Force Sensor and Sensing Method Using Crystal Rods and Light Signals US Patent 5,363,927 - Apparatus and Method for Hydraulic Drilling US Patent 5,361,856 - Well Jetting Apparatus and Met of Modifying a Well Therewith US Patent 5,335,724 - Directionally Oriented Slotting Method US Patent 5,325,923 - Well Completions with Expandable Casing Portions

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Following are some enhancements to hydra jetting tools and processes for specific applications.

The nozzle(s) can be mounted on a swivel to allow the nozzles to be directed in a preferred direction in the wellbore. For example, swivels with eccentric ends are used in horizontal or deviated wells to position tools below the swivel system. However, when the hole is not even or straight, such as in an openhole well, swivels may find themselves in a situation as shown in Figure 1b. (Note - 1a is supposedly what should happen). This means that the tool is being directed into the opposite direction as the job was designed for.

To overcome this problem multiple swivels, along with flexible joints such as a knuckle joint or flexible pipe can be used to conform to the irregularities of the wellhole and allow the concentric swivel to direct the jetting nozzle in the desired direction(s).

Figure 1a. Ideal case in cased completions

Figure 1b. Case in Openholes. Swivel in the Wrong Direction

Figure 1a. Ideal case in cased completions

Figure 1b. Case in Openholes. Swi...