PATENT CLAIM ANALYSIS

Application Number: 16040307
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-04
Patent Classification: ["166", "401000"]

Abstract:
The present invention provides a modified nano-graphite particle three-phase foam profile control and flooding system, which comprises a liquid phase and a gas phase, wherein the liquid phase comprises 0.15%-0.35% foaming agent, 0.04-0.1% foam stabilizer, and water that accounts for the remaining content, the sum of weight percentages of above components is 100%; a gas-liquid ratio of the gas phase to the liquid phase is (1-3):1. The foaming agent is selected from one of alkylsulfopropyl betaine and alkylamidopropyl betaine or a combination of them. The foam stabilizer is modified nano-graphite particles in 80-150 nm particle diameter. The present invention further provides a preparation method of the modified nano-graphite particle and a preparation method of the three-phase foam profile control and flooding system. The nano-graphite particle three-phase foam profile control and flooding system provided in the present invention can greatly improve the stability of generated foams, has excellent fluidity control capability, is low in cost, simple to prepare, and convenient for large-scale field construction.

Claim (Index 10):
A method of preparing a composition for foam profile control and flooding, the composition comprising a liquid phase and a gas phase, wherein:\n the liquid phase comprises 0.15%-0.35% foaming agent, 0.04-0.1% foam stabilizer, and water; and a gas-liquid ratio of the gas phase to the liquid phase is (1-3): 1 ; the method comprising the following steps:\n step 1: adding modified nano-graphite particles into water and stirring to disperse the nano-graphite particles, to obtain a graphite dispersed solution; \n wherein the modified nano-graphite particles are prepared with the following method:\n 1) adding dispersed graphite particles having a 15 \u03bcm particle diameter into deionized water and stirring for 10 min, to disperse the dispersed graphite particles at room temperature, to prepare a first graphite dispersed solution; \n 2) loading the first graphite dispersed solution into a colloid mill and shearing the first graphite dispersed solution cyclically for 5-10 min. under a 40-45 Hz shearing condition, to prepare a second graphite dispersed solution; \n 3) dispersing the second graphite dispersed solution by ultrasonic dispersion for 3-6 h, and removing the supernatant liquid, to obtain a homogeneous graphite dispersed solution; \n 4) adding sodium dodecyl sulfate, and stirring at 30-50\u00b0 C. temperature for 3-6 h, to obtain the modified nano-graphite particles having a 80-150 nm particle diameter; \n step 2: adding a foaming agent, and stirring till the foaming agent is dissolved fully, to obtain a liquid phase; \n step 3: charging a gas at (1-3):1 gas-liquid ratio by a foaming device into the liquid phase, to obtain a modified nano-graphite particle three-phase foam profile control and flooding system.

Metadata:
- Claim Count in Document: 13.0
- Percentile: 95.0
- Lexical Diversity: 2.08989
- Patent Class: 166.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15416850', '15519540', '12769144', '15147159', '15651528']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7808698148667582
- 35 USC 102 Novelty (BERT): 0.4776790850818314
- Combined Prediction Score: 0.7505507418882655
- Mean Citation Score: 222.37105000000005
- Max Citation Score: 230.34297
- Similarity Product: 174.35447760996402

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

Dataset: test