DRILLABLE PLUG
First Claim
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1. A drillable plug, comprising:
- a mandrel having a top end and a lower axial section, wherein the lower axial section comprises a geometry transition point separating an upper circular mandrel profile from a lower non-circular mandrel profile;
a seal element disposed around the upper circular mandrel profile;
a lower cone having an inner surface forming a passage, the lower cone disposed around the lower non-circular mandrel profile whereby the lower cone is rotationally locked with the mandrel; and
a lower slip assembly moveably disposed on a sloped outer surface of the lower cone.
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Abstract
A drillable plug includes a mandrel having an upper end and a lower axial section, the lower axial section having a geometry transition point separating an upper circular mandrel profile from a lower non-circular mandrel profile, a seal element disposed around the upper circular mandrel profile, and a lower cone having an inner surface forming a passage, the lower cone disposed around the lower non-circular mandrel profile whereby the lower cone is rotationally locked with the mandrel and a lower slip assembly moveably disposed on a sloped outer surface of the lower cone.
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Citations
20 Claims
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1. A drillable plug, comprising:
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a mandrel having a top end and a lower axial section, wherein the lower axial section comprises a geometry transition point separating an upper circular mandrel profile from a lower non-circular mandrel profile; a seal element disposed around the upper circular mandrel profile; a lower cone having an inner surface forming a passage, the lower cone disposed around the lower non-circular mandrel profile whereby the lower cone is rotationally locked with the mandrel; and a lower slip assembly moveably disposed on a sloped outer surface of the lower cone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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milling or drilling through a drillable plug that is set in a wellbore, the drillable plug comprising; a mandrel having a top end and a lower axial section, wherein the lower axial section comprises a geometry transition point separating an upper circular mandrel profile from a lower non-circular mandrel profile; an upper gage ring disposed around the mandrel adjacent the top end; a seal element disposed around the upper circular mandrel profile; an upper cone disposed around the upper circular mandrel profile between the upper gage ring and the seal element; an upper slip assembly moveably disposed on a sloped outer surface of the upper cone; a lower cone having an inner surface forming a passage, the lower cone disposed around the lower non-circular mandrel profile whereby the lower cone is rotationally locked with the mandrel; and a lower slip assembly moveably disposed on a sloped outer surface of the lower cone. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A drillable plug, comprising:
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a mandrel having a top end and a lower axial section, wherein the lower axial section comprises a geometry transition point separating an upper circular mandrel profile from a lower non-circular mandrel profile; an upper gage ring disposed around the mandrel adjacent the top end; a seal element disposed around the upper circular mandrel profile; an upper cone disposed around the upper circular mandrel profile between the upper gage ring and the seal element; an upper slip assembly moveably disposed on a sloped outer surface of the upper cone that is disposed between opposing side walls; a lower cone having an inner surface forming a passage comprising a circular section disposed about the upper circular mandrel profile and a non-circular section disposed around the lower non-circular mandrel profile whereby the lower cone is rotationally locked with the mandrel; a lower slip assembly moveably disposed on a sloped outer surface of the lower cone that is disposed between opposing side walls; and an end ring connected to a lower end of the seal element and comprising an axially extending member disposed in a recess formed in the inner surface of the lower cone. - View Dependent Claims (20)
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Specification