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 20):
A method of making a system for energy recovery from a first rod pump and a second rod pump, the first and second rod pumps having first and second rod strings including first and second polished rods, respectively, the method comprising:\n placing a first piston and a first seal gland within a first cylinder barrel to form a first hydraulic cylinder having a first pressure chamber between the first piston and the first seal gland; connecting the first piston to the first polished rod of the first rod string such that the first rod string reciprocates relative to the first rod pump with the reciprocating movement of the first piston to perform a pumping action of the first rod pump; placing a second piston and a second seal gland within a second cylinder barrel to form a second hydraulic cylinder having a second pressure chamber between the second piston and the second seal gland; connecting the second piston to the second polished rod of the second rod string such that the second rod string reciprocates relative to the second rod pump with the reciprocating movement of the second piston to perform a pumping action of the second rod pump; connecting a reversible hydraulic pump to the first pressure chamber and to the second pressure chamber; 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, the variable speed drive configured to actuate 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 from the second pressure chamber to the first pressure chamber to displace the first piston in the first cylinder barrel and raise the first rod string in an upstroke thereof, and flow of the hydraulic fluid by the reversible hydraulic pump is assisted by the downward weight force of the second rod string in a downstroke thereof on the second piston; and to actuate the motor-generator to operate in a reverse motor mode to rotate the rotor shaft and the coupling shaft in a reverse direction so that the reversible hydraulic pump pumps the hydraulic fluid from the first pressure chamber to the second pressure chamber to displace the second piston and raise the second rod string in an upstroke thereof, and flow of the hydraulic fluid by the reversible hydraulic pump is assisted by the downward weight force of the first rod string in a downstroke thereof on the first piston.

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): 0.7961743832366364
- 35 USC 102 Novelty (BERT): 0.5454852796185389
- Combined Prediction Score: 0.7711054728748266
- Mean Citation Score: 368.470156
- Max Citation Score: 395.69537
- Similarity Product: 327.7536727695215

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