Straddle packer systems
OwnerKarol Depiakinventor
Life of this patent
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Abstract
The present invention relates to straddle packer systems and methods of using them for downhole isolation of zones for fracturing treatment. More specifically, the system includes upper and lower seal systems having resiliently flexible sealing elements hydraulically and operatively connected to one another which are responsive to an increase in hydraulic pressure for setting the sealing elements at a first hydraulic pressure threshold. Additionally, the system includes a control system hydraulically and operatively connected between the upper and lower packer systems which is responsive to an increase in hydraulic pressure at a second hydraulic pressure threshold higher for activating a pressure switch system within the control system for opening at least one frac valve in the control system.
Claims16
A straddle packer and fracturing treatment system comprising:
- upper and lower seal systems having resiliently flexible sealing elements hydraulically and operatively connected to one another, the upper and lower packing systems responsive to an increase in hydraulic pressure for setting the sealing elements at a first hydraulic pressure threshold;
- a control system hydraulically and operatively connected between the upper and lower packer systems, the control system responsive to an increase in hydraulic pressure at a second hydraulic pressure threshold higher than the first hydraulic pressure for activating a pressure switch system within the control system for opening at least one frac valve in the control system, the pressure switch system responsive to a third hydraulic pressure threshold between the first and second hydraulic pressure thresholds for closing the at least one frac valve.
Dependencies are inferred from the claim text.