F04B2201/121 - CPC Classification Index

#1

20260078751

2026-03-19

GAS COMPRESSOR AND SYSTEM AND METHOD FOR GAS COMPRESSING

#2

20240418161

2024-12-19

GAS COMPRESSOR AND SYSTEM AND METHOD FOR GAS COMPRESSING

#3

20240309749

2024-09-19

NOVEL ROD-PUMP CONTROLLER

#4

20230184068

2023-06-15

SYSTEM AND METHOD FOR EVALUATING RECIPROCATING DOWNHOLE PUMP DATA USING POLAR COORDINATE ANALYTICS

#5

20220268273

2022-08-25

Gas compressor and system and method for gas compressing

#6

20220195864

2022-06-23

Optical monitoring and control of pumpjack

#7

20210363873

2021-11-25

Rod-pump controller

#8

20210317825

2021-10-14

Gas compressor and system and method for gas compressing

#9

20210270257

2021-09-02

Multi-phase fluid pump system

#10

20210222688

2021-07-22

Pump systems and methods to improve pump load predictions

#11

20200392822

2020-12-17

System and method for determining load and displacement of a polished rod

#12

20200340337

2020-10-29

Apparatus and methods for optimizing control of artificial lifting systems

#13

20200232312

2020-07-23

System and method for evaluating reciprocating downhole pump data using polar coordinate analytics

#14

20200124040

2020-04-23

Gas compressor and system and method for gas compressing

#15

20200018151

2020-01-16

Diagnostics of downhole dynamometer data for control and troubleshooting of reciprocating rod lift systems

#16

20190032652

2019-01-31

Gas compressor and system and method for gas compressing

#17

20180347327

2018-12-06

Lift apparatus for driving a downhole reciprocating pump

#18

20180328357

2018-11-15

Downhole dynamometer and method of operation

#19

20180073497

2018-03-15

Gas compressor and system and method for gas compressing

#20

20180030978

2018-02-01

Gas compressor and system and method for gas compressing

#21

20170363079

2017-12-21

Integrated wireless data system and method for pump control

#22

20170321526

2017-11-09

Lift apparatus for driving a downhole reciprocating pump

#23

20170298925

2017-10-19

Rod pumping unit and method of operation

#24

20170268500

2017-09-21

Controller and method of controlling a rod pumping unit

#25

20170052078

2017-02-23

Solar battery wireless load cell adapter

#26

20170037846

2017-02-09

Pumping control unit and method of computing a time-varying downhole parameter

#27

20170016313

2017-01-19

Diagnostics of downhole dynamometer data for control and troubleshooting of reciprocating rod lift systems

#28

20170002805

2017-01-05

ELECTRIC MOTOR CONTROL FOR PUMPJACK PUMPING

#29

20160003236

2016-01-07

Methods and apparatus to determine operating parameters of a pumping unit for use with wells

#30

20160003234

2016-01-07

Methods and apparatus to determine parameters of a pumping unit for use with wells

#31

20150285041

2015-10-08

Method for controlling an artificial lifting system and an artificial lifting system employing same

#32

20130151216

2013-06-13

Method and system for optimizing downhole fluid production

#33

20130115107

2013-05-09

Calculating downhole pump card with iterations on dual damping factors

#34

20130115104

2013-05-09

Calculating downhole pump card with iterations on single damping factor

#35

20130108472

2013-05-02

Fluid load line calculation and concavity test for downhole pump card

#36

20130104645

2013-05-02

Calculating downhole cards in deviated wells

#37

20100228398

2010-09-09

System and method for remotely monitoring and controlling pump jacks

#38

20100014989

2010-01-21

Pump jack pump-off control method and pump jack control apparatus

#39

20090311107

2009-12-17

Method, system, and apparatus for operating a sucker rod pump

#40

20090232662

2009-09-17

Method for estimating pump efficiency

#41

20080240930

2008-10-02

Method and System for Optimizing Downhole Fluid Production

#42

20070132603

2007-06-14

METHOD AND APPARATUS FOR MEASURING WORK PERFORMED BY A COMPRESSOR

#43

20070020110

2007-01-25

Method for estimating pump efficiency

#44

20060169447

2006-08-03

Integrated control system for beam pump systems

#45

20060067834

2006-03-30

Method for mitigating rod float in rod pumped wells

#46

17468342

2026-01-20

Method for autonomous control of oil and gas well down-hole pump surface unit and reduction of gas interference