PATENT CLAIM ANALYSIS

Application Number: 15874438
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["507", "105000"]

Abstract:
The present invention relates to the well drilling field in petrochemical industry, in particular to use of dual-cation fluorocarbon surfactant as amphiphobic wettability reversal agent in drilling fluid. The dual-cation fluorocarbon surfactant is a dual-cation fluorocarbon surfactant of which the cation part is represented by the following formula (1). The dual-cation fluorocarbon surfactant of the present invention can serve as wettability reversal agent when it is used for oil-gas drilling to enable rock amphiphobic, and is an amphiphobic wettability reversal agent which can cause rock surface to be non-hydrophilic and non-lipophilic. Using of dual-cation fluorocarbon surfactant, especially when drilling highly hydrous mud shale, can avoid permeation of water and oil into the rock effectively and thereby a capillary phenomenon can be prevented, and an effect of stabilizing the well wall and protecting the reservoir is attained.

Claim (Index 10):
The water-based drilling fluid according to  claim 9 , wherein each R 3  is independently selected from C2-C6 alkylene, each n is independently selected from 4-8, and m is 3-6.

Metadata:
- Claim Count in Document: 29.0
- Percentile: 86.0
- Lexical Diversity: 1.93421
- Patent Class: 507.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15635997', '15489193', '15489457', '15488927', '15488941']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8145096467979496
- 35 USC 102 Novelty (BERT): 0.5441434441871863
- Combined Prediction Score: 0.7874730265368732
- Mean Citation Score: 404.126228
- Max Citation Score: 409.97684
- Similarity Product: 336.88924964022635

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

Dataset: test