Lufkin Industries, LLC
27Patents
20Active
27Granted
48Portfolio score
Filing activity: Oct 10, 1989 → Feb 1, 2017 · 5 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8036829B2 | Apparatus for analysis and control of a reciprocating pump system by determination of a pump card | Fixed Constructions | 35 | Active |
| US9013322B2 | Real-time onsite internet communication with well manager for constant well optimization | Physics | 26 | Active |
| US7212923B2 | Inferred production rates of a rod pumped well from surface and pump card information | Fixed Constructions | 23 | Expired |
| US5052713A | Vehicle suspension safety system | Performing Operations; Transporting | 22 | Expired |
| US6857474B2 | Methods, apparatus and products useful in the operation of a sucker rod pump during the production of hydrocarbons | Fixed Constructions | 21 | Expired |
| US6912786B2 | Herringbone gear teeth and method for manufacturing same | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6015271A | Stowable walking beam pumping unit | Emerging Cross-Sectional Technologies | 12 | Expired |
| US7870900B2 | System and method for controlling a progressing cavity well pump | Fixed Constructions | 11 | Active |
| US8849594B2 | Methods for measuring leakage rate and inferring production rate of an oilfield downhole pump | Physics | 8 | Active |
| US9410572B2 | Five-axial groove cylindrical journal bearing with pressure dams for bi-directional rotation | Emerging Cross-Sectional Technologies | 8 | Active |
| US8240221B2 | Beam pumping unit for inclined wellhead | Emerging Cross-Sectional Technologies | 8 | Active |
| US8894286B2 | Bridge spring centering device for squeeze film dampers | Mechanical Engineering; Lighting; Heating | 7 | Active |
| US7547196B2 | Method for mitigating rod float in rod pumped wells | Mechanical Engineering; Lighting; Heating | 6 | Active |
| US8235107B2 | Hydraulic oil well pumping apparatus | Emerging Cross-Sectional Technologies | 6 | Active |
| US8433516B1 | Apparatus for analysis and control of a reciprocating pump system by determination of a pump card | Fixed Constructions | 3 | Active |
| US9115574B2 | Low profile rod pumping unit with pneumatic counterbalance for the active control of the rod string | Emerging Cross-Sectional Technologies | 3 | Active |
| US9618048B2 | Reverse bypass cooling for tilted pad journal and tilting pad thrust bearings | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US9587672B1 | Adjustable offset pivot journal pad | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US9541436B2 | Distributed two dimensional fluid sensor | Physics | 1 | Active |
| US6988420B2 | Method and apparatus for applying dynamic loads to a locked gear train for testing power transmission components | Physics | 1 | Expired |
| USD320770S | Tractor with fifth wheel plate for moving trailers | General | 1 | Expired |
| US10422205B2 | Low profile rod pumping unit with pneumatic counterbalance for the active control of the rod string | Emerging Cross-Sectional Technologies | 1 | Active |
| US9617837B2 | Hydraulic oil well pumping apparatus | Fixed Constructions | 0 | Active |
| US8678082B2 | Hydraulic oil well pumping apparatus | Emerging Cross-Sectional Technologies | 0 | Active |
| US10590725B2 | Optical alignment system for beam pumping unit | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.