PATENT CLAIM ANALYSIS

Application Number: 15758270
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-08
Patent Classification: ["166", "241600"]

Abstract:
A centralizer sub, system, and method for enhanced access to subterranean zones from the surface as used in oil and gas wellbore installations to center a pipe or casing within a wellbore or previous casing string during run-in, installation, or cementing procedures. In under-reamed applications, casing strings and centralizers pass through a smaller casing string before opening up to a larger hole where repeated compressions and decompressions of bow strings of centralizers can compromise integrity and reliability. A centralizer sub, system, and method reduces and controls insertion and running forces to preserve centralizer integrity and down-bore surfaces and equipment.

Claim (Index 7):
In a casing sub having a deployable bow spring centralizer, a selectively releasable locking mechanism comprising:\n a receptacle connectable to said bow spring centralizer, said receptacle being capable of engaging a corresponding tab and capable of engaging recesses defined in said casing sub; wherein engagement of said receptacle with said tab maintains said bow spring centralizer in a compressed state; a tab affixed to said casing sub and moveable between an engaged position and a disengaged position relative to said receptacle, wherein said tab, in said engaged position, engages said receptacle, and wherein said tab, in said disengaged position, does not restrict movement of said receptacle and said bow spring centralizer; a tab biasing spring, said tab biasing spring having a compressed state and a relaxed state, wherein said tab biasing spring is in its compressed state when said tab is engaged with said receptacle, and wherein said tab biasing spring urges said tab to transition to said disengaged position; a first ratchet band capable of circumferential movement about said casing sub, said first ratchet band having a first edge and a second edge, said first edge forming a release notch to allow said tab to move into said disengaged position, wherein rotational misalignment of said release notch and tab maintains the tab in its engaged position, and wherein alignment of said release notch and tab results in said tab transitioning to its disengaged position, said first edge having formed thereon ratcheting teeth to engage a ratchet spring lock affixed to said casing sub to prevent bi-directional movement of said first ratchet band, and said second edge forming thereon ratcheting teeth; a second ratchet band capable of circumferential movement about said casing sub, said second ratchet band having a first edge and a second edge, said first edge forming ratcheting teeth capable of engagement with said second edge of said first ratchet band so as to allow unidirectional rotation as between said first ratchet band and said second ratchet band, said second edge also forming a notch capable of receiving a spring-end bushing; a spring-end bushing; a compression spring fitted around the circumference of said casing sub, said spring having a first end and a second end, said first end being adapted to engage said spring-end bushing, said second end being adapted to engage a notch, said compression ring expanding in response to an increase in the diameter of said casing sub, wherein said compression spring tensions and causes rotation of said second ratchet band and said first ratchet band in a first direction, and wherein said compression spring relaxes in response to a decrease in the diameter of said casing sub and causes rotation of said second ratchet band in a second direction; an end band mounted to said casing sub to prevent rotational movement of said end band relative to the casing sub, said end band formed to receive said second end of said compression spring; and a cover fitted around said first ratchet band, said second ratchet band, and said compression spring.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 90.0
- Lexical Diversity: 1.57971
- Patent Class: 166.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15258671', '15399836', '14338620', '14961091', '14447187']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7845307872486182
- 35 USC 102 Novelty (BERT): 0.5915548848385254
- Combined Prediction Score: 0.765233197007609
- Mean Citation Score: 292.921762
- Max Citation Score: 516.53
- Similarity Product: 505.727682441473

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

Dataset: test