Electronically set and retrievable isolation devices for wellbores and methods thereof
First Claim
1. A sealing device for use in an open-hole wellbore to isolate an annulus of the open-hole wellbore, the sealing device comprising:
- a mandrel having a mandrel outer wall surface, and a mandrel inner wall surface defining a mandrel bore;
an expandable sealing element disposed on the mandrel outer wall surface, the expandable sealing element having a sealing element outer wall surface, a sealing element inner wall surface defining a sealing element chamber, a run-in position, and a set position, the sealing element chamber being in selective fluid communication with a mandrel or annulus port, the port being in fluid communication with a fluid source, said set position has said sealing element contacting the open hole wellbore for annulus isolation as between opposed ends of said sealing element;
an electrically-activated pump operatively associated with the port and the sealing element chamber and located outside said mandrel bore, the electrically-activated pump having an inlet in fluid communication with the fluid source through the port, and an outlet in fluid communication with the sealing element chamber; and
a power source mounted adjacent to said sealing element and located outside said mandrel bore and operatively associated with the electrically-activated pump,wherein the electrically-activated pump transports a fluid from the fluid source through the inlet, out of the outlet, and into the sealing element chamber to inflate the expandable sealing element from the run-in position to the set position, andwherein the electrically-activated pump transports the fluid from the sealing element chamber through the outlet, and out of the inlet to deflate the expandable sealing element from the set position toward the run-in position.
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0 Petitions
Accused Products
Abstract
Sealing devices such as packers comprise an expandable sealing element that is inflated and/or deflated by an electrically-activated pump disposed in a wellbore so that the sealing element can be set and retrieved from the wellbore. The pump is disposed downhole in close proximity to the expandable sealing element and is electronically associated with a surface processing unit located at the surface of the wellbore. In certain embodiments, an electric motor electronically associated with the surface processing unit drives the pump to flow a fluid into a chamber of the expandable sealing element to inflate the expandable sealing element and pumps the fluid out of the chamber of the expandable sealing element to deflate the expandable sealing element. Multiple sealing elements can be disposed on a tool or work string and all can be addressable and individually and separately controlled by the surface processing unit.
179 Citations
23 Claims
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1. A sealing device for use in an open-hole wellbore to isolate an annulus of the open-hole wellbore, the sealing device comprising:
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a mandrel having a mandrel outer wall surface, and a mandrel inner wall surface defining a mandrel bore; an expandable sealing element disposed on the mandrel outer wall surface, the expandable sealing element having a sealing element outer wall surface, a sealing element inner wall surface defining a sealing element chamber, a run-in position, and a set position, the sealing element chamber being in selective fluid communication with a mandrel or annulus port, the port being in fluid communication with a fluid source, said set position has said sealing element contacting the open hole wellbore for annulus isolation as between opposed ends of said sealing element; an electrically-activated pump operatively associated with the port and the sealing element chamber and located outside said mandrel bore, the electrically-activated pump having an inlet in fluid communication with the fluid source through the port, and an outlet in fluid communication with the sealing element chamber; and a power source mounted adjacent to said sealing element and located outside said mandrel bore and operatively associated with the electrically-activated pump, wherein the electrically-activated pump transports a fluid from the fluid source through the inlet, out of the outlet, and into the sealing element chamber to inflate the expandable sealing element from the run-in position to the set position, and wherein the electrically-activated pump transports the fluid from the sealing element chamber through the outlet, and out of the inlet to deflate the expandable sealing element from the set position toward the run-in position. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A sealing device for use in an open-hole wellbore to isolate an annulus of the open-hole wellbore, the sealing device comprising:
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a mandrel having a mandrel outer wall surface, and a mandrel inner wall surface defining a mandrel bore; an expandable sealing element disposed on the mandrel outer wall surface, the expandable sealing element having a sealing element outer wall surface, a sealing element inner wall surface defining a sealing element chamber, a run-in position, and a set position, the sealing element chamber being in selective fluid communication with a mandrel or annulus port, the port being in fluid communication with a fluid source, said set position has said sealing element contacting the open hole wellbore for annulus isolation; an electrically-activated pump operatively associated with the port and the sealing element chamber, the electrically-activated pump having an inlet in fluid communication with the fluid source through the port, and an outlet in fluid communication with the sealing element chamber; and a power source operatively associated with the electrically-activated pump, wherein the electrically-activated pump transports a fluid from the fluid source through the inlet, out of the outlet, and into the sealing element chamber to inflate the expandable sealing element from the run-in position to the set position, and wherein the electrically-activated pump transports the fluid from the sealing element chamber through the outlet, and out of the inlet to deflate the expandable sealing element from the set position toward the run-in position; wherein the port is disposed through the sealing element outer wall surface and the sealing element inner wall surface and in fluid communication with the sealing element chamber, and the fluid source comprises an annulus of the wellbore.
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9. A method of sealing an open-hole wellbore to divide an annulus of the open-hole wellbore, the method comprising:
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(a) electrically activating a first downhole pump located outside a bore of a mandrel and operatively associated with a first expandable sealing element of a first sealing device mounted to said mandrel causing a first fluid to flow into a chamber of the first expandable sealing element to inflate the first expandable sealing element; (b) continuing to pump the first fluid into the chamber of the first expandable sealing element until an outer wall surface of the first expandable sealing element engages with an inner wall surface of a wellbore; and (c) maintaining the first downhole pump in a first downhole pump stationary set position causing the outer wall surface of the first expandable sealing element to be maintained in contact with the inner wall surface of the wellbore to define a first isolated zone within the wellbore while maintaining clear said bore of said mandrel. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification