PATENT CLAIM ANALYSIS

Application Number: 16226464
Application Type: Utility
Filing Date: 2018-12
Publication Date: 2019-04
Patent Classification: ["166", "308200"]

Abstract:
This disclosure describes formulations and methods for remediating subterranean-formed metal-polymer complexes in wells in subterranean formations. In one embodiment, the method includes injecting a metal-polymer complex remediation mixture containing a metal complexing agent into a subterranean formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the metal-polymer complex remediation mixture is pumped from the subsurface. This has been shown to remediate polymer-containing, subterranean-formed metal-polymer complexes in shale formations. Without being held to a particular theory it appears that the metal complexing agent is forming metal complexes with the metals in the complexes, and particularly divalent metal ions. This removal of naturally occurring metals may be un-crosslinking and causing the metal-polymer complexes to go into solution, thereby removing the blockages caused by the metal-polymer complexes.

Claim (Index 21):
A method for remediating a subterranean-formed metal-polymer complex in a pre-existing well in a low permeability subterranean formation, the method comprising:\n providing a metal-polymer complex remediation mixture comprising between 0.1% and 95% by weight metal complexing agent; injecting the metal-polymer complex remediation mixture into the well at a pressure less than a fracture pressure of the subterranean formation until at least some of the metal-polymer complex remediation mixture contacts the subterranean-formed metal-polymer complex, the metal of the subterranean-formed metal-polymer complex including metal naturally present within the subterranean formation; maintaining the metal-polymer complex remediation mixture in contact with the subterranean-formed metal-polymer complex for a contact time of between about 1 minute and about 100 days, thereby allowing the metal complexing agent to cause the subterranean-formed metal-polymer complex to dissociate and dissolve but not precipitate the metal and thereby creating a low viscosity flow back fluid comprising the spent metal-polymer complex remediation mixture and the metal-polymer complex components; and removing the low viscosity flow back fluid from the well after the contact time, thereby improving hydrocarbon production of the well.

Metadata:
- Claim Count in Document: 65.0
- Percentile: 98.0
- Lexical Diversity: 1.72093
- Patent Class: 166.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14525038', '15875265', '14686237', '14373717', '13354461']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8010238784945859
- 35 USC 102 Novelty (BERT): 0.5599347865388615
- Combined Prediction Score: 0.7769149692990135
- Mean Citation Score: 333.97827000000007
- Max Citation Score: 481.20502
- Similarity Product: 368.2998916092849

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

Dataset: test