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US 8,240,377 B2Granted
Methods of integrating analysis, auto-sealing, and swellable-packer elements for a reliable annular seal
AssigneeHalliburton Energy Services, Inc.
InventorsDavid S. Kulakofsky, Ronnie Faul, William Hunter, Krishna M. Ravi, Anthony Badalamenti
Life of this patent
Estimating the term…
Abstract
A method of cementing involves introducing a pipe string into a well bore such that an annulus is defined between the pipe string and a wall of the well bore, and introducing a cement composition into the annulus. The cement composition includes cement, water, and an auto-sealing component. An annular structure, coupled to the pipe string, comprises an expandable material.
Claims16
A method of cementing comprising:
- choosing a cement composition based at least partially on an analysis of well incidents;
- introducing a pipe string and an annular structure into a well bore such that an annulus is defined between the pipe string and a wall of the well bore, wherein the annular structure, having a solid form before being introduced into the well bore, is coupled to the pipe string and comprises an expandable material;
- and
- introducing the cement composition into the annulus, wherein the cement composition comprises cement, water, and an auto-sealing component to seal a crack formed in the cement composition after the cement composition has hardened, and wherein the annular structure is adapted to seal a space formed between the cement composition and the pipe.
1 more element
A method of cementing comprising:
- determining well characteristics;
- determining well events;
- determining cement data for each cement composition of a group of cement compositions;
- determining total maximum stress differences for each cement composition of the group of cement compositions using the cement data;
- determining effective cement compositions from the group of cement compositions, wherein determining comprises comparing the well characteristics and the total maximum stress differences to the cement data from each cement composition of the group of cement compositions;
- determining risk of cement failure for each of the effective cement compositions;
- selecting one of the effective cement compositions, wherein the selected effective cement composition comprises cement, water, and an auto-sealing component to seal a crack formed in the selected effective cement composition after the selected effective cement composition has hardened;
- introducing a pipe string and an annular structure into a well bore such that an annulus is defined between the pipe string and a wall of the well bore, wherein the annular structure, having a solid form before being introduced into the well bore, is coupled to the pipe string and comprises an expandable material;
- introducing the selected effective cement composition into the annulus;
- and
- allowing the selected effective cement composition to set in the annulus to form a cement sheath;
- wherein the annular structure is adapted to seal a space formed between the cement sheath and the pipe string.
9 more elements
Dependencies are inferred from the claim text.