PATENT CLAIM ANALYSIS

Application Number: 15772056
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-11
Patent Classification: ["166", "355000"]

Abstract:
Disclosed herein are embodiments of an offshore drilling rig comprising: a drill floor ( 107 ) defining a well center ( 123 ); a hoisting system configured to advance a tubular string ( 128 ) downwards through the well center ( 123 ) and to the seafloor ( 124 ) and to apply a lifting force to a tubular string ( 128 ) extending through the well center ( 123 ) and to the seafloor ( 124 ), the lifting force being large enough to support at least a major part of an apparent weight of the tubular string ( 128 ); and an anti-recoil system ( 218 ) configured to cause, in case of a sudden reduction of a load suspended from the drilling rig, the hoisting system to raise the tubular string ( 128 ) while preventing damage to the hoisting system.

Claim (Index 20):
A method of operating an offshore drilling rig, the drilling rig comprising a drill floor defining a well center, a hoisting system configured to raise and/or lower a tubular string through the well center; wherein the method comprises:\n suspending a high pressure tubular string from the hoisting system, the high pressure tubular string extending through the well center and downwards to the seafloor; detecting a sudden reduction of a load suspended from the hoisting system; controlling the hoisting system to raise high pressure tubular string while preventing damage to the hoisting system\n wherein\n the hoisting system comprises one or more hydraulic cylinders and wherein controlling comprises controlling fluid flow between a fluid reservoir and the one or more hydraulic cylinders, or \n the hoisting system is a draw works hoisting system comprising a crown compensator comprising one or more crown compensating hydraulic cylinders and controlling comprises controlling fluid flow between a fluid reservoir and the one or more crown compensating hydraulic cylinders.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 91.0
- Lexical Diversity: 2.28788
- Patent Class: 166.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15520952', '14891808', '14777325', '15123553', '14777017']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8216547701732462
- 35 USC 102 Novelty (BERT): 0.5122676687655081
- Combined Prediction Score: 0.7907160600324724
- Mean Citation Score: 333.142558
- Max Citation Score: 344.4026
- Similarity Product: 255.80172236571312

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

Dataset: test