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Fluid Loss Control Device Providing Multiple Entries

IP.com Disclosure Number: IPCOM000198330D
Publication Date: 2010-Aug-04
Document File: 1 page(s) / 25K

Publishing Venue

The IP.com Prior Art Database

Abstract

In order to have fluid loss control immediately after gravel packing, as well as after a coiled-tubing acid job and other jobs, it is required for fluid loss control device to allow multiple entries for the service tool system. This invention still adopts the proven flapper technology to provide flow barrier like the existing designs. However the new features enable the device to be opened and closed to a unlimited number of times by a simple shifting-up with a shifting tool attached to wash pipe or other workstrings. As depicted in the figure 1 of the attachment "multi-entry-FLCV.doc", the flapper is connected to the connecting sleeve through the arm with hinge joints. The connecting sleeve interacts through the spring_2 with the shifting sleeve, which has a shifting profile cut on its ID. In this position, the spring_1 pushes on the shifting sleeve to keep the flapper closed. To open the valve, use the shifting tool attached to wash pipe or other workstrings to find the shifting profile on the ID of the shifting sleeve and pull up. Once the shifting tool disengages from the profile, the key (green part in figure 1) will lock the sleeves in the J-slot on the ID of the housing against the spring_1 to keep the flapper open (as showed in figure 2). To close the valve, again just simply use the same shifting tool find the profile and pull up, once the shifting releases, the key moves out of the locking position on the housing to let the sleeves shift down as being pushed by spring_1 to close the valve, and so on to open and close the valve to any required number of times.

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In order to have fluid loss control immediately after gravel packing, as well as after a coiled-tubing acid job and other jobs, it is required for fluid loss control device to allow multiple entries for the service tool system. This invention still adopts the proven flapper technology to provide flow barrier like the existing designs. However the new features enable the device to be opened and closed to a unlimited number of times by a simple shifting-up with a shifting tool attached to wash pipe or other workstrings. As depicted in the figure 1 of the attachment "multi-entry-FLCV.doc", the flapper is connected to the connecting sleeve through the arm with hinge joints. The connecting sleeve interacts through the spring_2 with the shifting sleeve, which has a shifting profile cut on its ID. In this position, the spring_1 pushes on the shifting sleeve to keep the flapper closed. To open the valve, use the shifting tool attached to wash pipe or other workstrings to find the shifting profile on the ID of the shifting sleeve and pull up. Once the shifting tool disengages from the profile, the key (green part in figure 1) will lock the sleeves in the J-slot on the ID of the housing against the spring_1 to keep the flapper open (as showed in figure 2). To close the valve, again just simply use the same shifting tool find the profile and pull up, once the shifting releases, the key moves out of the locking position on the housing to let the sleeves shift down as being pushed...