Drillable bridge plug
AssigneeBJ Services Company
InventorsGabriel Slup, Douglas J. Lehr
Life of this patent
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Abstract
A method and apparatus for use in a subterranean well is described. The apparatus typically includes a subterranean plug including a mandrel having an outer surface and a non-circular cross-section and a packing element arranged about the mandrel, the packing element having a non-cylindrical inner surface matching the mandrel outer surface such that concentric rotation between the mandrel and the packing element is precluded. The apparatus may include slips having cavities to facilitate quick drill-out of the plug.
Claims74
A slip assembly for use on subterranean apparatus comprising:
- a first cone with at least one channel therein;
- and
- a first plurality of slips, each slip having at least one cavity, the first plurality of slips being arranged about the first cone in the at least one channel of the first cone.
A subterranean apparatus having a drillable bridge plug for use within a wellbore comprising:
- a mandrel having an outer surface and a non-circular cross-section;
- a packing element arranged about the mandrel, the packing element having a non-circular inner surface such that rotation between the mandrel and the packing element is precluded as the outer surface of the mandrel and inner surface of the packing element have matching shapes that interfere with one another in rotation;
- and
- an anchoring assembly having a first plurality of slips arranged about the mandrel, the first plurality of slips being configured in a non-circular loop such that rotation between the mandrel and the first plurality of slips is precluded by interference between the loop and the mandrel outer surface,
- each slip of the first plurality of slips having at least one cavity therein to facilitate subsequent drilling out of the slips.
A slip assembly for use on subterranean apparatus comprising:
- a first cone with at least one channel therein;
- and
- a first plurality of slips, each slip having at least one cavity, the first plurality of slips being arranged about the first cone in the at least one channel of the first cone;
- a second cone having at least one channel;
- and
- a second plurality of slips, each slip having a cavity, the second plurality of slips being arranged about the second cone in at leas one channel of the second cone.
A slip assembly for use on subterranean apparatus comprising:
- a first cone with at least one channel therein;
- and
- a first plurality of slips, each slip having at least one longitudinal cavity running substantially the length of the slip, the first plurality of slips being arranged about the first cone in the at least one channel of the first cone.
A slip assembly for use on subterranean apparatus comprising:
- a first cone with at least one channel therein;
- and
- a first plurality of slips, each slip having wickers and at least one internal cavity immediately adjacent the wickers, the first plurality of slips being arranged about the first cone in the at least one channel of the first cone.
A slip assembly for use on subterranean apparatus comprising:
- a first cone with at least one channel therein;
- and
- a first plurality of slips, each slip and at least one hollow cavity to enhance break up of the slip during a removal operation, the first plurality of slips being arranged about the first cone in the at least one channel of the first cone.
Dependencies are inferred from the claim text.