DRILLABLE BRIDGE PLUG
First Claim
1. A downhole tool for isolating zones in a well, the tool comprising:
- a mandrel;
a sealing element disposed around the mandrel;
an upper cone disposed around the mandrel proximate an upper end of the sealing element;
an upper slip assembly disposed around the mandrel adjacent a sloped surface of the upper cone;
a lower cone disposed around the mandrel proximate a lower end of the sealing element;
a lower slip assembly disposed around the mandrel adjacent a sloped surface of the lower cone;
two element end rings, a first element end ring disposed adjacent the upper end of the sealing element and a second element end ring disposed adjacent the lower end of the sealing element; and
two element barrier assemblies, each assembly disposed adjacent one of the two element end rings and each of the two element barrier assemblies comprising a first barrier ring and a second barrier ring,wherein each of the first and second barrier rings has a cylindrical portion, a first face, and a second end, wherein the cylindrical portion is formed with a plurality of slits extending from the second end to a location behind the first face, and wherein the slits formed on the first barrier ring are rotationally offset from the slits formed on the second barrier ring.
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Accused Products
Abstract
A downhole tool for isolating zones in a well, the tool including a mandrel, a sealing element disposed around the mandrel, an upper cone disposed around the mandrel proximate an upper end of the sealing element, an upper slip assembly disposed around the mandrel adjacent a sloped surface of the upper cone, a lower cone disposed around the mandrel proximate a lower end of the sealing element, a lower slip assembly disposed around the mandrel adjacent a sloped surface of the lower cone, two element end rings, a first element end ring disposed adjacent the upper end of the sealing element and a second element end ring disposed adjacent the lower end of the sealing element, and two element barrier assemblies, each assembly disposed adjacent one of the two element end rings is disclosed.
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Citations
26 Claims
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1. A downhole tool for isolating zones in a well, the tool comprising:
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a mandrel; a sealing element disposed around the mandrel; an upper cone disposed around the mandrel proximate an upper end of the sealing element; an upper slip assembly disposed around the mandrel adjacent a sloped surface of the upper cone; a lower cone disposed around the mandrel proximate a lower end of the sealing element; a lower slip assembly disposed around the mandrel adjacent a sloped surface of the lower cone; two element end rings, a first element end ring disposed adjacent the upper end of the sealing element and a second element end ring disposed adjacent the lower end of the sealing element; and two element barrier assemblies, each assembly disposed adjacent one of the two element end rings and each of the two element barrier assemblies comprising a first barrier ring and a second barrier ring, wherein each of the first and second barrier rings has a cylindrical portion, a first face, and a second end, wherein the cylindrical portion is formed with a plurality of slits extending from the second end to a location behind the first face, and wherein the slits formed on the first barrier ring are rotationally offset from the slits formed on the second barrier ring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A downhole tool for isolating zones in a well, the tool comprising:
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a mandrel; a sealing element disposed around the mandrel; an upper cone disposed around the mandrel proximate an upper end of the sealing element; an upper slip assembly disposed around the mandrel adjacent a sloped surface of the upper cone; a lower cone disposed around the mandrel proximate a lower end of the sealing element; a lower slip assembly disposed around the mandrel adjacent a sloped surface of the lower cone; two element end rings, a first element end ring disposed adjacent the upper end of the sealing element and a second element end ring disposed adjacent the lower end of the sealing element; and two element barrier assemblies, each assembly disposed adjacent one of the two element end rings, wherein at least one of the two element end rings comprises at least one protrusion extending axially away from the sealing element. - View Dependent Claims (13, 14)
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15. A downhole tool for isolating zones in a well, the tool comprising:
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a mandrel; a sealing element disposed around the mandrel; an upper cone disposed around the mandrel proximate an upper end of the sealing element; an upper slip assembly disposed around the mandrel adjacent a sloped surface of the upper cone; a lower cone disposed around the mandrel proximate a lower end of the sealing element; a lower slip assembly disposed around the mandrel adjacent a sloped surface of the lower cone; two element end rings, a first element end ring disposed adjacent the upper end of the sealing element and a second element end ring disposed adjacent the lower end of the sealing element; two element barrier assemblies, each assembly disposed adjacent one of the two element end rings; and a locking device disposed proximate an upper end of the mandrel, wherein the locking device comprises an upper gage ring and an axial lock ring.
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16. A downhole tool for isolating zones in a well, the tool comprising:
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a mandrel; a sealing element disposed around the mandrel; an upper cone disposed around the mandrel proximate an upper end of the sealing element; an upper slip assembly disposed around the mandrel adjacent a sloped surface of the upper cone; a lower cone disposed around the mandrel proximate a lower end of the sealing element; a lower slip assembly disposed around the mandrel adjacent a sloped surface of the lower cone; two element end rings, a first element end ring disposed adjacent the upper end of the sealing element and a second element end ring disposed adjacent the lower end of the sealing element; and two element barrier assemblies, each assembly disposed adjacent one of the two element end rings, wherein at least one of the upper and lower cones comprises at least one tab disposed on a surface facing the sealing element, and wherein the at least one tab is configured to rotationally lock the at least one of the upper and lower cones with the element barrier assemblies and the sealing element. - View Dependent Claims (17)
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18. A downhole tool for isolating zones in a well, the tool comprising:
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a mandrel; a sealing element disposed around the mandrel; an upper cone disposed around the mandrel proximate an upper end of the sealing element; an upper slip assembly disposed around the mandrel adjacent a sloped surface of the upper cone; a lower cone disposed around the mandrel proximate a lower end of the sealing element; a lower slip assembly disposed around the mandrel adjacent a sloped surface of the lower cone; two element end rings, a first element end ring disposed adjacent the upper end of the sealing element and a second element end ring disposed adjacent the lower end of the sealing element; and two element barrier assemblies, each assembly disposed adjacent one of the two element end rings, wherein at least one of the upper and lower slip assemblies comprises an anchoring device, the anchoring device comprising a conical inner surface configured to engage the sloped surfaces of the upper cone and the lower cones, and wherein the anchoring device comprises a frangible ring having at least two axial slots extending from a second end of the anchoring device. - View Dependent Claims (19, 20, 21)
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22. A downhole tool for isolating zones in a well, the tool comprising:
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a mandrel; a sealing element disposed around the mandrel; an upper cone disposed around the mandrel proximate an upper end of the sealing element; an upper slip assembly disposed around the mandrel adjacent a sloped surface of the upper cone; a lower cone disposed around the mandrel proximate a lower end of the sealing element; a lower slip assembly disposed around the mandrel adjacent a sloped surface of the lower cone; two element end rings, a first element end ring disposed adjacent the upper end of the sealing element and a second element end ring disposed adjacent the lower end of the sealing element; and two element barrier assemblies, each assembly disposed adjacent one of the two element end rings, wherein at least one of the upper and lower slip assemblies comprises an anchoring device, the anchoring device comprising a conical inner surface configured to engage the sloped surfaces of the upper cone and the lower cones, and wherein the anchoring device comprises a slip base and a plurality of slips disposed on the slip base. - View Dependent Claims (23, 24, 25)
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26. A downhole tool for isolating zones in a well, the tool comprising:
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a mandrel; a sealing element disposed around the mandrel; an upper cone disposed around the mandrel proximate an upper end of the sealing element; an upper slip assembly disposed around the mandrel adjacent a sloped surface of the upper cone; a lower cone disposed around the mandrel proximate a lower end of the sealing element; a lower slip assembly disposed around the mandrel adjacent a sloped surface of the lower cone; two element end rings, a first element end ring disposed adjacent the upper end of the sealing element and a second element end ring disposed adjacent the lower end of the sealing element; and two element barrier assemblies, each assembly disposed adjacent one of the two element end rings, wherein the upper slip assembly comprises an upper end having a plurality of castellations configured to engage a plurality of castellations formed on a lower end of an upper gage ring, and wherein the lower slip assembly comprises a lower end having a plurality of castellations configured to engage a plurality of castellations formed on an upper end of a lower gage ring.
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Specification