Isolation Sleeve for Downhole Equipment
AssigneeTejas Research & Engineering, LLC
InventorJason C. Mailand
Life of this patent
Estimating the term…
Abstract
A protective sleeve is deployable within an oil/gas well to protect a device installed in the well such as a safety valve, for example. The sleeve includes a pressure equalizing dart and an overpressure protection piston. The sleeve also serves to isolate an installed device from harmful substances such as acids and other corrosive fluids.
Claims7
A protective sleeve adapted to be secured within a well for protecting existing devices positioned within the well from pressure, wear, and exposure to harsh chemicals comprising;
- a) a housing including a collet housing and a downstream housing,
- b) a locking collet slidably received in said collet housing,
- c) the housing including a pressure balancing chamber, a floating piston within the pressure balancing chamber and a frangible member for preventing movement of the floating piston until a threshold differential pressure is reached.
A protective sleeve adapted to be secured within a well for protecting a device positioned within the well comprising:
- a) a housing including a collet housing and a downstream housing,
- b) a locking collet slidably received in said collet housing and
- c) a pressure equalizing dart located in a wall of the housing and having a flow passage closed at an end by a frangible member, said frangible member being severed as the protection sleeve is withdrawn from the well.
Dependencies are inferred from the claim text.