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 14):
A system for energy recovery from first and second rod pumps, each having a rod string including a polished rod, the system comprising:\n a first hydraulic cylinder having a first cylinder barrel, a first piston having a first piston rod located for reciprocating movement within the first cylinder barrel, and a first seal gland in the first cylinder barrel slidably receiving the first piston rod and forming a first pressure chamber with the first piston in the first cylinder barrel; the first piston rod connected to the first rod string such that the first rod string reciprocates with the reciprocating movement of the first piston to perform a pumping action with the first rod pump; a second hydraulic cylinder having a second cylinder barrel, a second piston having a second piston rod located for reciprocating movement within the second cylinder barrel, and a second seal gland in the second cylinder barrel slidably receiving the second piston rod and forming a second pressure chamber with the second piston in the second cylinder barrel; the second piston rod connected to a second rod string of the second rod pump such that the second rod string reciprocates with the reciprocating movement of the second piston to perform a pumping action with the second rod pump; a reversible hydraulic pump connected to the first pressure chamber and to the second pressure chamber, the hydraulic pump having a coupling shaft; a motor-generator having a rotor shaft connected to the coupling shaft; and a variable frequency drive that actuates the motor-generator to operate in a motor mode to rotate the rotor shaft and the coupling shaft in a forward direction wherein the reversible hydraulic pump pumps hydraulic fluid from the second pressure chamber directly to the first pressure chamber to displace the first piston 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; and the variable frequency drive actuates 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 to the second pressure chamber to displace the second piston and raise the second rod string in an upstroke thereof, wherein a weight of the first rod string in a downstroke thereof assists in displacing the first piston downwardly to pump the hydraulic fluid from the first pressure chamber through the reversible hydraulic pump directly to the second pressure chamber to raise the second piston and the second rod string in an upstroke 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): 0.7961529216895117
- 35 USC 102 Novelty (BERT): 0.5455235167832759
- Combined Prediction Score: 0.7710899811988882
- Mean Citation Score: 368.470156
- Max Citation Score: 395.69537
- Similarity Product: 328.58028973194007

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