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Means for Reducing Expansion Cone Diameter

IP.com Disclosure Number: IPCOM000128970D
Publication Date: 2005-Sep-23
Document File: 1 page(s) / 8K

Publishing Venue

The IP.com Prior Art Database

Abstract

Introduction: To provide for the expansion of expandable screens using a variable cone so as to allow the cone to be retracted to a smaller OD without having to pull out of the well while still maintaining the ability to expand at the larger OD when a tight spot has been cleared. Problem with Prior Art – Current Technology: The current technology allows the cone to be reduced only after pulling the expansion tools from the well which costs the operator time and money. Objective: Allow a variable expansion to take place without pulling the tools from the well. Potential Applications: Expandable screens. New Approach: By using an indexing collet much like the ones used for the weight down circulate tools that are used for Gravel Packing we can move the ramp from under the expansion cone by pulling up and indexing the collet. When weight is slacked off the ramp will be slightly higher than the original run in position facilitating a smaller OD of the expansion cone. When the tight spot is cleared the mandrel can be again raised and the collet indexed to place the tool in the original position allowing the expansion to take place at the maximum OD. This would require that the cone section be changed using 2 mandrels, one to be at the bottom of the taper of the ramp and extending into the upper mandrel, sealed by beta seals so that pressure integrity can be maintained. The indexing collet can be placed on the lower mandrel and the indexing profile can be placed in the upper mandrel. To make the lower mandrel stay in place while indexing the collet, hydraulic pressure can be applied to the work string forcing the lower mandrel down. It is suggested that the collet can be indexed so that multiple positions can be used when trying to clear tight spots in the screen. Advantages of New Approach: This allows the cone to be adjusted while the expansion is underway without having to pull the tools from the well bore. It will also allow the original expansion OD to be resumed after the tight spot has been cleared.

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Title: Means of Reducing Expansion Cone Diameter

Introduction: To provide for the expansion of expandable screens using a variable cone so as to allow the cone to be retracted to a smaller OD without having to pull out of the well while still maintaining the ability to expand at the larger OD when a tight spot has been cleared.

Problem with Prior Art - Current Technology: The current technology allows the cone to be reduced only after pulling the expansion tools from the well which costs the operator time and money.

Objective: Allow a variable expansion to take place without pulling the tools from the well.

Potential Applications: Expandable screens.

New Approach: By using an indexing collet much like the ones used for the weight down circulate tools that are used for Gravel Packing we can move the ramp from under the expansion cone by pulling up and indexing the collet. When weight is slacked off the ramp will be slightly higher than the original run in position facilitating a smaller OD of the expansion cone. When the tight spot is cleared the mandrel can be again raised and the collet indexed to place the tool in the original position allowing the expansion to take place at the maximum OD. This would require that the cone section be changed using 2 mandrels, one to be at the bottom of the taper of the ramp and extending into the upper mandrel, sealed by beta seals so that pressure integrity can be maintained. The indexing collet can be placed on the lower mand...