Browse Prior Art Database

Erosion Resistant Baffle Insert

IP.com Disclosure Number: IPCOM000206300D
Publication Date: 2011-Apr-18
Document File: 5 page(s) / 491K

Publishing Venue

The IP.com Prior Art Database

Abstract

With increasing demand for easier and quicker solutions for completing complex, horizontal wells, many downhole stimulation systems have been designed. One of the many stimulation solutions utilizes downhole tools that use a ball and baffle system with a sliding sleeve design that allows for wellbore access. These sliding sleeves can be activated, or shifted, using a ball and baffle mechanism. The baffle has a corresponding ball size which seats on the baffle and shifts the sliding sleeve open allowing access to the wellbore for stimulation. The application that these tools are used in requires the pumping of abrasive fluids at high velocity through the baffles. This high velocity pumping results in the loss of baffle material due to erosive wear. This erosive wear is countered by decreasing pump rates, therefore increasing the required job time which results in higher costs. This paper details the design of an erosion resistant baffle insert that protects the baffle from erosive wear. By increasing the baffle’s resistance to erosive wear, higher pump rates can be used during the fracturing procedure and therefore decrease overall operational costs.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 42% of the total text.

Page 01 of 5

Erosion Resistant Baffle Insert

ABSTRACT

With increasing demand for easier and quicker solutions for completing complex, horizontal wells, many downhole stimulation systems have been designed. One of the many stimulation solutions utilizes downhole tools that use a ball and baffle system with a sliding sleeve design that allows for wellbore access. These sliding sleeves can be activated, or shifted, using a ball and baffle mechanism. The baffle has a corresponding ball size which seats on the baffle and shifts the sliding sleeve open allowing access to the wellbore for stimulation. The application that these tools are used in requires the pumping of abrasive fluids at high velocity through the baffles. This high velocity pumping results in the loss of baffle material due to erosive wear. This erosive wear is countered by decreasing pump rates, therefore increasing the required job time which results in higher costs. This paper details the design of an erosion resistant baffle insert that protects the baffle from erosive wear. By increasing the baffle's resistance to erosive wear, higher pump rates can be used during the fracturing procedure and therefore decrease overall operational costs.

DESIGN DETAILS

The baffle insert that is described in this document is used with a ball and baffle completion systems. Figure 1 shows a single hole baffle that is used with the ball/baffle system.

(This page contains 00 pictures or other non-text object)

 

Figure 1: Typical single hole baffle without insert.

The hole diameter of the baffle acts as a restriction to the flow of proppant laden fluid when pumped through the tool. Because of this restriction, the baffle experiences large amounts of erosive wear. In order to decrease the amount of erosion that occurs during pumping, the material's hardness must be increased. However, the baffle also needs the capability to be drilled out after treatment to clean the production string. If the baffle material is too hard, then drillability becomes an issue. The erosion resistant baffle insert allows the baffle to maintain its


Page 02 of 5

drillability while adding resistance to erosion by having a thin layer of erosion resistant material protecting the surface of the baffle. The baffle insert is used in both single hole baffle and multiple hole baffle designs. Figure 2 shows a picture of the erosion resistant insert.

(This page contains 00 pictures or other non-text object)

(This page contains 01 pictures or other non-text object)

 

Figure 2: Erosion resistant baffle insert.

As seen in Figure 2, the insert is a thin piece that is 0.25 inches thick and is press fit into the corresponding baffle. This allows the insert to stay in place without the use of any fasteners or adhesives. The insert has an inner diameter that is the same inner diameter as the original baffle hole(s). This means that the baffle's original hole(s) will need to be bored out to the corresponding outer diameter that all...