Piezoresistive cement nanocomposites
US-10167714-B2 · Jan 1, 2019 · US
Water swellable cement sheath on demand, with sensing capability
US11680198B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11680198-B2 |
| Application number | US-201916570783-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 13, 2019 |
| Priority date | Sep 13, 2019 |
| Publication date | Jun 20, 2023 |
| Grant date | Jun 20, 2023 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A method of sealing propagating cracks in a sensor-laden cement sheath comprising the steps of monitoring an electrical resistivity of the sensor-laden cement sheath to produce a measured value, wherein the sensor-laden cement sheath comprises a conductive sensor, an on-demand expanding agent, and a cement, activating a heat source when the measured value of the electrical resistivity is greater than an activation threshold, increasing a temperature of the sensor-laden cement sheath with the heat source to an activation temperature, wherein the activation temperature is operable to initiate a reaction between the on-demand expanding agent and water, wherein the activation temperature is greater than a formation temperature, reacting the on-demand expanding agent with water to produce a swelled agent, wherein the swelled agent occupies a greater volume than the on-demand expanding agent, and sealing the propagating cracks in the sensor-laden cement sheath with the swelled agent.
First claim
Opening claim text (preview).
That which is claimed is: 1. A method of sealing propagating cracks in a sensor-laden cement sheath comprising the steps of: monitoring an electrical resistivity of the sensor-laden cement sheath to produce a measured value, wherein the sensor-laden cement sheath comprises a conductive sensor, an on-demand expanding agent, and a cement; activating a heat source when the measured value of the electrical resistivity is greater than an activation threshold, such that the measured value that is greater than the activation threshold is operable to indicate propagating cracks in the sensor-laden cement sheath; increasing a temperature of the sensor-laden cement sheath with the heat source to an activation temperature, wherein the activation temperature is operable to initiate a reaction between the on-demand expanding agent and water, wherein the activation temperature is greater than a formation temperature; reacting the on-demand expanding agent with water to produce a swelled agent, wherein the swelled agent occupies a greater volume than the on-demand expanding agent; and sealing the propagating cracks in the sensor-laden cement sheath with the swelled agent. 2. The method of claim 1 , wherein the step of monitoring an electrical resistivity of the sensor-laden cement sheath comprises the steps of: determining a measured value of an electrical resistivity of the sensor-laden cement sheath; and comparing the measured value of the electrical resistivity to an activation threshold, wherein the activation threshold is the electrical resistivity that corresponds to a minimum acceptable amount of propagating cracks in the sensor-laden cement sheath. 3. The method of claim 1 , wherein the conductive sensor is selected from the group consisting of carbon nanotubes, carbon fibers, graphene, metal fibers, and combinations of the same. 4. The method of claim 1 , wherein the on-demand expanding agent is selected from the group consisting of magnesium oxide, calcium oxide, and combinations of the same. 5. The method of claim 1 , wherein the heat source is selected from the group consisting of a hot fluid, electricity applications, resistive heating, microwave applications, and combinations of the same. 6. The method of claim 1 , wherein the sensor-laden cement sheath further comprises water-filled vesicles. 7. The method of claim 1 , wherein the on-demand expanding agent further comprises an encapsulation compound. 8. The method of claim 7 , wherein the encapsulation compound is selected from the group consisting of polymeric compounds, ceramic compounds, and combinations of the same.
Assignees
Inventors
Classifications
Oxides, Hydroxides (C04B22/0013 takes precedence) · CPC title
- C09K8/467Primary
containing additives for specific purposes · CPC title
Metal · CPC title
for cementing casings into boreholes · CPC title
Electrically conducting materials · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11680198B2 cover?
- A method of sealing propagating cracks in a sensor-laden cement sheath comprising the steps of monitoring an electrical resistivity of the sensor-laden cement sheath to produce a measured value, wherein the sensor-laden cement sheath comprises a conductive sensor, an on-demand expanding agent, and a cement, activating a heat source when the measured value of the electrical resistivity is greate…
- Who is the assignee on this patent?
- Saudi Arabian Oil Co
- What technology area does this patent fall under?
- Primary CPC classification C09K8/467. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 20 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).