PATENT CLAIM ANALYSIS

Application Number: 16013408
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2018-10
Patent Classification: ["417", "245000"]

Abstract:
A hydraulic oil well pumping system is provided. The system uses a pump to exert hydraulic pressure against a reciprocating piston over a wellbore. The piston is connected to a rod string and downhole pump for pumping oil from a wellbore. The system includes an electronic control system that controls movement of the piston as it moves between the upper and lower rod positions by cycling the hydraulic system between (i) an “upstroke” condition wherein the pump is pumping oil through the oil line into the hydraulic cylinder to move the piston to its upper rod position, and (ii) a “neutral” condition wherein the pump is no longer pumping oil into the hydraulic cylinder, but is allowing oil to flow back through the oil line in response to gravitational fall of the piston. The control system is programmed to cycle based upon a volumetric calculation of hydraulic oil in the cylinder without reference to position sensors along the wellhead. Wellhead conditions or placement of the hydraulic cylinder inside the wellbore may prohibit attaching physical sensors at the wellhead. A method for pumping oil from a wellbore using such a system is also provided herein.

Claim (Index 1):
A hydraulic oil well pumping system, comprising:\n an elongated hydraulic cylinder; a piston that is movable between upper and lower rod positions within the cylinder; a rod string that is mechanically connected to and that extends downwardly from the piston, the rod string being configured to extend from a wellhead and into a wellbore for pumping oil from the wellbore; a prime mover; a hydraulic pump that is powered by the prime mover; a directional control valve that moves between upstroke and downstroke flow positions; an oil line fluidly connecting the pump and the hydraulic cylinder, the directional control valve being positioned along the oil line so that it can direct flow between the pump and the cylinder; a fluid reservoir for containing hydraulic fluid to be supplied to the pump; a vent line configured to return any oil that leaks past the piston back to the fluid reservoir or the oil line; an electronic control system that controls movement of the piston as it moves between the upper and lower rod positions by cycling the directional control valve between (i) an \u201cupstroke\u201d condition wherein the pump is pumping fluid through the oil line and into the hydraulic cylinder to move the piston to its upper rod position, and (ii) a \u201cneutral\u201d condition wherein the pump is no longer pumping fluid into the hydraulic cylinder, but is allowing hydraulic fluid to flow back through the oil line in response to gravitational fall of the piston; a pressure sensor residing along the oil line configured to transmit pressure signals indicative of pressure within the the hydraulic cylinder; and wherein the electronic control system is programmed to determine location of the piston and to cycle movement of the piston in the hydraulic cylinder based upon a combination of the pressure signals and signals indicative of a volume of hydraulic fluid moving into or out of the cylinder in real time, and without reference to position sensors along the wellhead, and further wherein the cycling movement of the piston includes changing an operating speed of the prime mover in response to determining location of the piston and changing a downstroke speed in response to changes in load on the rod string.

Metadata:
- Claim Count in Document: 4.0
- Percentile: 94.0
- Lexical Diversity: 2.11
- Patent Class: 417.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15013210', '14680740', '15258755', '14231331', '15656252']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8046371613778133
- 35 USC 102 Novelty (BERT): 0.6081683671645058
- Combined Prediction Score: 0.7849902819564825
- Mean Citation Score: 435.750764
- Max Citation Score: 564.7857
- Similarity Product: 476.1843292838573

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test