PATENT CLAIM ANALYSIS

Application Number: 16080600
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-01
Patent Classification: ["367", "082000"]

Abstract:
Methods, systems, and techniques for controlling voltage applied across a piezoelectric stack of a downhole acoustic transmitter. At least one of the temperature of the stack and the compressive stress applied to the stack is monitored. At least one of the temperature of the stack and the compressive stress applied to the stack is compared to a temperature threshold and a stress threshold, respectively. When the stack signal is an alternating voltage signal and when at least one of the temperature of the stack and the compressive stress applied to the stack respectively exceeds the temperature threshold and the stress threshold, the stack signal is modified such that a negative polarity portion of the stack signal has a maximum magnitude less than a magnitude of a negative polarity limit.

Claim (Index 1):
An acoustic transmitter for transmitting an acoustic signal through a drill pipe, the transmitter comprising:\n (a) a piezoelectric stack; (b) voltage boost circuitry for boosting a voltage from a voltage source; (c) signal modulation circuitry electrically coupled to the voltage boost circuitry and to the stack, the signal modulation circuitry for applying a stack signal comprising voltage from the voltage source across the stack; (d) at least one of a temperature sensor and a compression sensor positioned to measure a temperature of the stack and compressive stress applied to the stack, respectively; and (e) control circuitry communicatively coupled to the voltage boost circuitry, signal modulation circuitry, and to the at least one of the temperature sensor and the compression sensor, the control circuitry configured to perform a method comprising:\n (i) monitoring at least one of the temperature of the stack and the compressive stress applied to the stack; \n (ii) comparing at least one of the temperature of the stack and the compressive stress applied to the stack to a temperature threshold and a stress threshold, respectively; and \n (iii) when the stack signal is an alternating voltage signal and when at least one of the temperature of the stack and the compressive stress applied to the stack respectively exceeds the temperature threshold and the stress threshold, modifying the stack signal such that a negative polarity portion of the stack signal has a maximum magnitude less than a magnitude of a negative polarity limit.

Metadata:
- Claim Count in Document: 47.0
- Percentile: 96.0
- Lexical Diversity: 2.74
- Patent Class: 367.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14766421', '12075365', '16335152', '10654872', '11359290']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5868555170533406
- 35 USC 102 Novelty (BERT): 0.480584043414506
- Combined Prediction Score: 0.5762283696894571
- Mean Citation Score: 164.36654199999995
- Max Citation Score: 230.88629
- Similarity Product: 184.68533676867423

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