Activation Screen (18-Jan-2010)
Stand-alone screen and screen coupled with various types of inflow control devices (ICDs) all share one major disadvantage; they lack fluid loss control. Currently there are several methods of overcoming this problem. They include bridge plugs, annular check valves, inflow control valves, sliding side doors, and other similar devices. All of these methods can be used to set packers, prevent fluid loss through the screen, isolate the lower completion from the upper, etc, but they can be costly and time consuming to install and utilize. A different approach to the problem is to isolate each screen from the tubing ID and then bring them onto production by simply rupturing or dissolving a cost effective plug located under the screen assembly. Screens are individually brought online by simply straddling a set of plugs or rupture disks and applying acid or a pressure pulse.
Activation Screen
Defensive Publication
December 14th, 2009
Abstract
Stand-alone screen and screen coupled with various types of inflow control devices (ICDs) all share one major disadvantage; they lack fluid loss control.
Currently there are several methods of overcoming this problem. They include bridge plugs, annular check valves, inflow control valves, sliding side doors, and other similar devices.
All of these methods can be used to set packers, prevent fluid loss through the screen, isolate the lower completion from the upper, etc, but they can be costly and time consuming to install and utilize.
A different approach to the problem is to isolate each screen from the tubing ID and then bring them onto production by simply rupturing or dissolving a cost effective plug located under the screen assembly.
Screens are individually brought online by simply straddling a set of plugs or rupture disks and applying acid or a pressure pulse.
Design
To function properly the filter must have an axial drainage layer, similar to an ICD screen, because all flow will be traversing the length of the base pipe to a large perforation. If the filter is a wire wrap type screen then no drainage layer is necessary. If the filter is a mesh type screen then a wire wrap type screen will need to be installed underneath the mesh screen.
Ideally the perforation would be located near the middle of the screen joint. However the quantity of perforations could vary depending on expected flow rates through the screen. If this is the case then the perforations would be spaced out evenly under the screen. Each perforation would be threaded
and/or capable of receiving a rupture disk or soft metal plug via press fit,
braze, or other similar methods. .
The rupture disk or dissolving plug would not extend past the inner wall of the base pipe, but could slightly rise above the outer wall as long as the filter being installed over the device has clearance.
The straddle tool would ideally be run down on coiled tubing. It would be similar to a bull plug that h...
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