PATENT CLAIM ANALYSIS

Application Number: 15755094
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["175", "005000"]

Abstract:
A method of operating a drilling system. The drilling system includes a drill string extending into a wellbore, a driver which rotates the drill string, a pump to pump drilling fluid down the drill string, a wellhead mounted at the wellbore, a riser extending up from the wellhead around the drill string, a blowout preventer mounted on the wellhead, a riser closure device mounted in the riser, a first return conduit, and a flow outlet arranged in the riser below the riser closure device. The method includes operating the driver to stop a rotation of the drill string, closing the riser closure device if it is not already closed, operating the pump to stop a pumping of drilling fluid down the drill string, closing the blowout preventer, and increasing a wellbore pressure by controlling a rate of the flow of the fluid along the first return conduit.

Claim (Index 34):
A method of operating a drilling system,\n the drilling system comprising:\n a drill string which extends into a wellbore; \n a driver configured to rotate the drill string; \n a pump configured to pump drilling fluid down the drill string; \n a wellhead mounted at a top of the wellbore; \n a riser configured to extend up from the wellhead around the drill string so as to provide a riser annulus between the riser and the drill string; \n a blowout preventer mounted on the wellhead, the blowout preventer being configured to close around the drill string so as to substantially prevent a flow of a fluid from an annular space around the drill string in the wellbore into the riser annulus, the blowout preventer comprising a sealing element which is configured to engage with the drill string when the blowout preventer is operated to close around the drill string; \n a riser closure device mounted in the riser, the riser closure device being configured to close around the drill string so as to substantially prevent the flow of the fluid along the riser annulus; \n a first return conduit; and \n a flow outlet arranged in the riser below the riser closure device, the flow outlet being configured to connect the riser annulus to the first return conduit, \n wherein, after determining that there is or may be a need to close the blowout preventer, the method of operating the drilling system implements a control procedure comprising the steps: a) operating the driver to stop a rotation of the drill string; b) closing the riser closure device if the riser closure device is not already closed; c) operating the pump to stop a pumping of drilling fluid down the drill string; d) closing the blowout preventer; and e) increasing a wellbore pressure by controlling a rate of the flow of the fluid along the first return conduit.

Metadata:
- Claim Count in Document: 91.0
- Percentile: 88.0
- Lexical Diversity: 2.65574
- Patent Class: 175.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14170666', '12936254', '15294798', '14872753', '14950122']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7626686145362642
- 35 USC 102 Novelty (BERT): 0.5405811166241755
- Combined Prediction Score: 0.7404598647450554
- Mean Citation Score: 414.903062
- Max Citation Score: 440.86136
- Similarity Product: 374.9572060340214

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