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 4):
The wettability reversal agent according to  claim 3 , wherein each R 1  is independently selected from methyl, ethyl, n-propyl, isopropyl, and n-butyl, each R 2  is independently selected from H, methyl, ethyl, n-propyl, isopropyl, and n-butyl, each R 3  is independently selected from \u2014CH 2 \u2014CH 2 \u2014, \u2014CH 2 \u2014CH 2 \u2014CH 2 \u2014, \u2014CH(CH 3 )\u2014CH 2 \u2014, \u2014CH 2 \u2014CH(CH 3 )\u2014, \u2014CH 2 \u2014(CH 2 ) 2 \u2014CH 2 \u2014, \u2014CH 2 \u2014(CH 2 ) 3 \u2014CH 2 \u2014, and \u2014CH 2 \u2014(CH 2 ) 4 \u2014CH 2 \u2014, each n is independently selected from 4, 5, 6, 7 and 8, and m is selected from 3, 4, 5 and 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): 0.8142827381751393
- 35 USC 102 Novelty (BERT): 0.5447104820016317
- Combined Prediction Score: 0.7873255125577885
- Mean Citation Score: 404.126228
- Max Citation Score: 409.97684
- Similarity Product: 344.8130124481653

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