PATENT CLAIM ANALYSIS

Application Number: 16358113
Application Type: Utility
Filing Date: 2019-03
Publication Date: 2019-09
Patent Classification: ["417", "375000"]

Abstract:
A system for energy recovery from a rod pump includes, in an exemplary embodiment, a hydraulic cylinder having a barrel, a piston, and a pressure chamber; the piston connected to a rod string of the rod pump; a reversible hydraulic pump connected to the pressure chamber; and a motor-generator having a rotor shaft connected to a coupling shaft of the pump; wherein the motor-generator operates in a motor mode to rotate the rotor and coupling shafts in a forward direction so that the hydraulic pump pumps hydraulic fluid to the pressure chamber to raise the piston and rod string in an upstroke, and operates in a generator mode in which a weight of the rod string displaces the piston in a downstroke to pump hydraulic fluid from the pressure chamber to rotate the pump coupling shaft and the rotor shaft in a reverse direction such that the motor-generator generates electricity.

Claim (Index 12):
The system of  claim 11 , further comprising a second hydraulic cylinder having a second cylinder barrel, a second piston located for reciprocating movement within the second cylinder barrel, and a second pressure chamber in the cylinder barrel; the second piston connected to a second polished rod of a second rod string of a second rod pump such that the second polished rod reciprocates with the reciprocating movement of the second piston to perform a pumping action; and a third hydraulic fluid line connecting the valve on the second hydraulic fluid line to the second pressure chamber; and\n wherein the variable frequency drive is configured to actuate the motor-generator to operate in the motor mode to rotate the rotor shaft and the coupling shaft in the forward direction so that the reversible hydraulic pump pumps hydraulic fluid to the pressure chamber of the hydraulic cylinder from the second pressure chamber of the second hydraulic cylinder to displace the piston in the cylinder barrel to raise the rod string in an upstroke thereof, whereby the hydraulic fluid flow is assisted by the downward gravitational force of the second rod string on the second piston in a downstroke thereof.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 99.0
- Lexical Diversity: 2.75862
- Patent Class: 417.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14680740', '16013408', '15013210', '12803478', '15258755']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7965082209473098
- 35 USC 102 Novelty (BERT): 0.5448891787198236
- Combined Prediction Score: 0.7713463167245612
- Mean Citation Score: 368.470156
- Max Citation Score: 395.69537
- Similarity Product: 314.88285420557264

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

Dataset: test