Improvement to/Variant of Modular Hydraulic Operator for a Subterranean Tool
Publication Date: 2014-Oct-16
The IP.com Prior Art Database
This invention presents a different way of being able to repeatedly lock out and open a Fluid Loss Control Valve or any mechanically operated tool. The invention consists of the following items: 1. An actuating member that is able to interface with a mechanically operated tool. 2. A piston that is able to push against a housing/spring to cycle an indexing mechanism. 3. Said indexing member has a number of slots that can index a pre-determined amount/number of cycles. 4. Said indexing member has profiles/nubs that are in-line with slots that allow the invention to retain a spring force and/or loads from the piston. 5. A locking device (device could be a profile that is part of the housing/member mentioned in item 6) that locks/interfaces onto a profile after some amount of travel. 6. A housing/member that aligns the locking device to the indexing member. 7. A spring that is able to cycle the indexing member and open a mechanically operated tool. The Tool operates as follows: 1. A work string is tripped out of the well; on the end of the work string is a shifting tool. 2. Said shifting tool latches onto a profile and is continued to be pulled out of hole. 3. This action compresses a spring and simultaneously moves a locking device and moves the locking device past locking nubs of the indexing member. While that happens, the member covering the indexing member is aligned in such a way that another locking device mentioned in step 6 is out of phase with its respective profile and causes no hindrance of locking the tool out. 4. Continuing to pull out of hole, the shifting tool releases from the profile and the Hydraulic Actuator is “Locked Out”. In the present this is being pursued to open a fluid loss control valve. As the Hydraulic Actuator is locked out (by the lock collet) the fluid loss control valve at this point would be closed. 5. After some duration it is decided to re-open the closed valve. A pre-determined number of pressure cycles is used to cycle the tool. 6. As pressure is applied for the first time, the indexing member is indexed to a position such that the next time pressure is bled, the locking device mentioned in step 3 and 4 is no longer used. An internal shoulder of the member covering the indexing member interfaces with shoulder nubs of the indexing member. Again this action is accomplished by a piston pushing against a spring, this movement translates the indexing member to its next position. When pressure is bled the spring pushes back and indexes the indexing member further. 7. On the final cycle once pressure is bled the locking arrangement mentioned in steps 3 and 6 is once again out of phase of its respective profile. This allows the Hydraulic Actuator to fully stroke out and open any tool. 8. Also on the final cycle, the locking device mentioned in step 3 is again aligned to the locking nubs of the indexing member when fully stroked so that the next time a shifting tool is pulled out the process can begin again.