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 17):
A method of making a system for energy recovery from a rod pump having a rod string including a polished rod, the method comprising:\n placing a piston and a seal gland within a cylinder barrel to form a hydraulic cylinder having a pressure chamber between the piston and the seal gland; connecting the piston to a polished rod of the rod string such that the rod string reciprocates with the reciprocating movement of the piston to perform a pumping action of the rod pump; connecting a reversible hydraulic pump to the pressure chamber of the hydraulic cylinder; and connecting a rotor shaft of a motor-generator to a coupling shaft of the reversible hydraulic pump; connecting a variable speed drive to the motor-generator, and configuring the variable speed drive to operate the motor-generator in a motor mode to rotate the rotor shaft and the coupling shaft in a forward direction so that the reversible hydraulic pump pumps hydraulic fluid to the pressure chamber to displace the piston in the cylinder barrel and raise the rod string in an upstroke thereof, and to operate the motor-generator in a generator mode in which a weight of the rod string in a downstroke thereof lowers relative to the rod pump and displaces the piston in the cylinder barrel to pump the hydraulic fluid from the pressure chamber to the reversible hydraulic pump to rotate the coupling shaft and the rotor shaft in a reverse direction such that the motor-generator generates electricity.

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): 0.7959173216729265
- 35 USC 102 Novelty (BERT): 0.545943684263372
- Combined Prediction Score: 0.7709199579319711
- Mean Citation Score: 368.470156
- Max Citation Score: 395.69537
- Similarity Product: 337.6527929760516

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