PATENT CLAIM ANALYSIS

Application Number: 15981998
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2019-11
Patent Classification: ["166", "295000"]

Abstract:
A method for plugging and sealing subsurface formations using alkaline nanosilica dispersion and a delayed activation chemistry is disclosed. In accordance with one embodiment of the present disclosure, the method includes introducing a mixture with a first pH into the subsurface formation. The mixture comprises an aqueous solution, an alkaline nanosilica dispersion and a water-insoluble hydrolyzable compound. The method further includes allowing the water-insoluble hydrolyzable compound to hydrolyze in the subsurface formation to form an acid at 70° C. or greater, thereby acidizing the mixture to a reduced second pH and causing the alkaline nanosilica dispersion to gel into a solid and seal the subsurface formation. A composition for sealing a subsurface formation is also disclosed. The composition includes an aqueous mixture including water, an alkaline nanosilica dispersion, and a water-insoluble hydrolyzable compound.

Claim (Index 6):
The method of  claim 5 , in which the filtration control additive comprises at least one of starch and polyanionic cellulose.

Metadata:
- Claim Count in Document: 44.0
- Percentile: 93.0
- Lexical Diversity: 2.11765
- Patent Class: 166.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['15679884', '10574298', '15495233', '15887690', '11365615']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7912806917247306
- 35 USC 102 Novelty (BERT): 0.4649363724022166
- Combined Prediction Score: 0.7586462597924792
- Mean Citation Score: 163.68187799999995
- Max Citation Score: 168.90536
- Similarity Product: 123.96468933153152

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test