Back to results
US 11,230,905 B2Granted
Buoyancy assist tool with waffle debris barrier
AssigneeHalliburton Energy Services, Inc.
InventorsLonnie Carl Helms, Min Mark Yuan, Mayur Narain Ahuja, Ishwar Dilip Patil, Byong Jun Kim, Rajesh Parameshwaraiah
Life of this patent
Estimating the term…
Abstract
A downhole apparatus comprises a casing string with a removable plug therein to block flow therethrough. A flow barrier is positioned in the casing below the removable plug and the removable plug and the flow barrier define a buoyancy chamber therebetween. A debris barrier positioned above the removable plug has a plurality of fragments interspersed in a stretchable material and includes a frangible disc.
Claims20
A downhole apparatus comprising:
- a casing string;
- a removable plug positioned in the casing string and configured to block flow therethrough;
- a flow barrier positioned in the casing string below the removable plug, the removable plug and flow barrier defining a buoyancy chamber therebetween;
- and
- a flexible, tearable membrane positioned across a central flow passage of the casing above the removable plug, the flexible tearable membrane comprised of a stretchable first material with a plurality of fragments of a second material interspersed therein, the removable plug and flexible, tearable membrane defining a fluid chamber therebetween, the flexible, tearable membrane configured to tear into small pieces upon the application of a fluid pressure in the casing string.
2 more elements
A downhole apparatus comprising:
- an outer case connectible at upper and lower ends in a casing string;
- a plug housing connected in the outer case;
- a degradable plug fixed in the plug housing;
- and
- a flexible barrier positioned in the outer case above the degradable plug, the flexible barrier comprising:
- a connecting ring connected to the outer case;
- and
- a stretchable, tearable membrane comprising a plurality of rigid fragments interspersed in a stretchable base material connected to the connecting ring, the stretchable, tearable membrane configured to tear upon an application of a pressure in the outer case.
5 more elements
A downhole apparatus comprising:
- a casing string;
- an outer case connected in the casing string at upper and lower ends thereof, the outer case having a removable plug connected therein;
- a flow barrier connected in the casing string below the removable plug, the flow barrier and casing string defining a buoyancy chamber therebetween;
- a flexible, tearable membrane comprising a stretchable material with a plurality of rigid fragments interspersed therein positioned across a central flow passage of the outer case above the removable plug;
- and
- the flexible, tearable membrane separating a fluid in the casing above the flexible, tearable membrane from a fluid in a fluid chamber defined by and between the flexible, tearable membrane and the removable plug and tearable into small pieces upon the application of a fluid pressure in the casing.
3 more elements
Dependencies are inferred from the claim text.