Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Earth drilling and mining Patent Leaders in 2019 2019

Primary CPC class E21 · Section E

Rankings count each patent once by its primary Cooperative Patent Classification. All-time pages aggregate the full database; year pages use patent grant year.

Recent years: 2016201720182019202020212022202320242025

Patents per Year

Patents granted per year, 1996 to 2025Bar chart with a peak of 3,238 patents in 2019.peak 3,2381996: 634 patents19961997: 557 patents1998: 796 patents1999: 838 patents19992000: 974 patents2001: 1,102 patents2002: 1,020 patents20022003: 1,014 patents2004: 1,046 patents2005: 877 patents20052006: 1,183 patents2007: 1,049 patents2008: 1,132 patents20082009: 1,088 patents2010: 1,656 patents2011: 1,495 patents20112012: 1,736 patents2013: 1,847 patents2014: 2,135 patents20142015: 2,318 patents2016: 2,454 patents2017: 2,612 patents20172018: 2,721 patents2019: 3,238 patents2020: 3,076 patents20202021: 2,876 patents2022: 2,754 patents2023: 2,767 patents20232024: 2,676 patents2025: 2,630 patents2025

Top Inventors

Rank ↑ Inventor ↕ Patents ↕ Primary Company ↕
1 Michael Linley Fripp 30 Halliburton Energy Services
2 Aaron W. Logan 27 Evolution Engineering
3 Burkay Donderici 25 Halliburton Energy Services
#4 Zhiyue Xu 23 —
#5 Justin C. Logan 18 Evolution Engineering
#6 John T. Hardesty 15 Geodynamics
#7 Robello Samuel 15 Landmark Graphics
#8 YingQing Xu 15 —
#9 David A. Switzer 14 Evolution Engineering
#10 Patrick R. Derkacz 14 Evolution Engineering
#11 William Mark Richards 14 Halliburton Energy Services
#12 James C. Doane 13 Baker Hughes Holdings
#13 Nicholas Frederick Budler 13 Halliburton Energy Services
#14 Zachary William Walton 13 Halliburton Energy Services
#15 Roger L. Schultz 12 Thru Tubing Solutions
#16 Zhihui Zhang 12 —
#17 Glenn Andrew Wilson 11 Halliburton Energy Services
#18 Jacques Orban 11 Schlumberger Technology
#19 Jinjiang Xiao 11 Saudi Arabian Oil
#20 Shilin Chen 11 Halliburton Energy Services
#21 Thomas Jules Frosell 11 Halliburton Energy Services
#22 Cyrus Barimani 10 Wirtgen Gmbh
#23 Dennis P. Nguyen 10 Cameron International
#24 Mark Adrian Honey 10 —
#25 Per Arild Andresen 10 —
#26 Rune A. Skarbo 10 Intel
#27 Youxiang Zuo 10 Schlumberger Technology
#28 Albert W. Chau 9 Merlin Technology
#29 Anthony A. DiGiovanni 9 Baker Hughes Holdings
#30 Colin James Mason 9 Mitsubishi Electric
#31 Danny E. Scott 9 Baker Hughes Holdings
#32 Jason D. Dykstra 9 Halliburton Energy Services
#33 Jan Kare Igland 9 —
#34 Joop Roodenburg 9 Itrec B.V.
#35 Kevin Perry Richardson 9 —
#36 Mohamed Ibrahim Saraya 9 Vertice Oil Tools
#37 Nigel Charles Last 9 —
#38 Paul Hazel 9 Welltec A/S
#39 Philip D. Nguyen 9 Halliburton Energy Services
#40 Randy C. Tolman 9 ExxonMobil
#41 Sigurd Tjostheim 9 —
#42 Stephen Tean Edwards 9 Bp Corporation North America
#43 Thomas Hestenes Jakobsen 9 —
#44 Trond Waage 9 —
#45 Ashish Gupta 8 Nabors Drilling Technologies Usa
#46 Ashley Bernard Johnson 8 Schlumberger Technology
#47 Christopher Michael Jones 8 Halliburton Energy Services
#48 David Joe Steele 8 Halliburton Energy Services
#49 David S. Wesson 8 Geodynamics
#50 John C. Gano 8 Halliburton Energy Services
#51 Juan Miguel Bilen 8 Baker Hughes Holdings
#52 Kevin R. George 8 Geodynamics
#53 Luis Emilio San Martin 8 Halliburton Energy Services
#54 Mark W. Roberson 8 Halliburton Energy Services
#55 Michael S. Bittar 8 Halliburton Energy Services
#56 Mohamed Nabil Noui-Mehidi 8 Saudi Arabian Oil
#57 Paul F. Rodney 8 Halliburton Energy Services
#58 Phillip Sollami 8 The Sollami
#59 Ricardo Vasques 8 Schlumberger Technology
#60 Ryan Sangjun Lee 8 Schlumberger Technology
#61 Zachary Ryan Murphree 8 Halliburton Energy Services
#62 Zachary S. Silva 8 —
#63 Batakrishna Mandal 7 Halliburton Energy Services
#64 Bernhard Ebner 7 Sandvik Intellectual Property Ab
#65 Bjoern Thiemann 7 Weatherford Technology Holdings
#66 Brock Watson 7 Thru Tubing Solutions
#67 Christian Leuchtenberg 7 Managed Pressure Operations Pte.
#68 David W. Teale 7 Weatherford Technology Holdings
#69 Diederick Bernardus Wijning 7 Itrec B.V.
#70 Duke VanLue 7 Downhole Technology
#71 Fereidoun Abbassian 7 Baroid Technology
#72 Gary L. Rytlewski 7 Schlumberger Technology
#73 Hsu-Hsiang Wu 7 Halliburton Energy Services
#74 Jack Gammill Clemens 7 Halliburton Energy Services
#75 James S. Sanchez 7 —
#76 Jonathan L. Mace 7 Los Alamos National Security
#77 Jon David Schroder 7 —
#78 Kang-Huai Wang 7 Capsovision
#79 Kirk P. Guidry 7 Cameron International
#80 Lei Zhao 7 —
#81 Limin Song 7 ExxonMobil
#82 Martin Liess 7 Weatherford Technology Holdings
#83 Michael T. Pelletier 7 Halliburton Energy Services
#84 Michael C. Robertson 7 Robertson Intellectual Properties
#85 Michael C. Romer 7 ExxonMobil
#86 Nicholas J. Lyons 7 Baker Hughes Holdings
#87 Peter Kris Cleven 7 Comitt Well Solutions Us Holding
#88 Robert S. O'Brien 7 Baker Hughes Holdings
#89 Rudolf Carl Pessier 7 Baker Hughes Holdings
#90 Sankarrappan Periyasamy 7 —
#91 Stephen Michael Greci 7 Halliburton Energy Services
#92 Thomas Lehnert 7 Wirtgen Gmbh
#93 Yibing Zhang 7 ExxonMobil
#94 Adriaan Gisolf 6 Schlumberger Technology
#95 Ahmed Elsayed Fouda 6 Halliburton Energy Services
#96 Alexander Boehm 6 —
#97 Andrew M. Ferguson 6 Thru Tubing Solutions
#98 Baris Guner 6 Halliburton Energy Services
#99 Dale E. Jamison 6 Halliburton Energy Services
#100 Debkumar Mukhopadhyay 6 Us Synthetic

Top Companies

Rank ↑ Company ↕ Patents ↕
1 Halliburton Energy Services 512
2 Baker Hughes Holdings 293
3 Schlumberger Technology 287
#4 Weatherford Technology Holdings 121
#5 Saudi Arabian Oil 99
#6 Cameron International 78
#7 ExxonMobil 39
#8 Landmark Graphics 33
#9 Nabors Drilling Technologies Usa 32
#10 GE 30
#11 Phillips Petroleum 28
#12 Evolution Engineering 25
#13 Chevron 22
#14 Shell Oil Compny 20
#15 Geodynamics 19
#16 Smith International 19
#17 Welltec Oilfield Solutions Ag 18
#18 Sandvik Intellectual Property Ab 17
#19 Onesubsea Ip Uk Limited 16
#20 Joy Global Underground Mining 15
#21 Unknown 15
#22 China University Of Mining And Technology 13
#23 Innovex Downhole Solutions 13
#24 National Oilwell Varco 13
#25 Statoil Petroleum As 13
#26 Wirtgen Gmbh 13
#27 Merlin Technology 12
#28 Thru Tubing Solutions 12
#29 M-I L.L.C. 11
#30 Caterpillar 11
#31 Fmc 9
#32 Forum Us 9
#33 Ncs Multistage 9
#34 Us Synthetic 9
#35 Vallourec Oil And Gas France 9
#36 Apergy Bmcs Acquisition 8
#37 Epiroc Rock Drills Aktiebolag 8
#38 Itrec B.V. 8
#39 Sandvik Mining And Construction Oy 8
#40 The Sollami 8
#41 Vertice Oil Tools 8
#42 Welltec A/S 8
#43 Aps Technology 7
#44 Dynaenergetics Gmbh & Co. Kg 7
#45 Frank'S International 7
#46 Maersk Drilling A/S 7
#47 Magnum Oil Tools International 7
#48 Managed Pressure Operations Pte. 7
#49 Mhwirth As 7
#50 Ulterra Drilling Technologies 7
#51 Vetco Gray 7
#52 Dril-Quip 6
#53 Hunting Titan 6
#54 Ifp Energies Nouvelles 6
#55 Institute Of Geology And Geophysics, Chinese Academy Of Sciences 6
#56 Tejas Research & Engineering 6
#57 Total E&P Danmark A/S 6
#58 Triad National Security 6
#59 Vermeer Manufacturing 6
#60 China University Of Petroleum (East China) 5
#61 Comitt Well Solutions Us Holding 5
#62 Element Six Limited 5
#63 Hydril Usa Distribution 5
#64 Katch Kan Holdings 5
#65 National Oilwell Varco Norway As 5
#66 Ncm Innovations (Pty) 5
#67 Pruitt Tool & Supply 5
#68 Qinterra Technologies As 5
#69 Robertson Intellectual Properties 5
#70 Scientific Drilling International 5
#71 Southwest Petroleum University 5
#72 University Of Texas System 5
#73 The Charles Machine Works 5
#74 Total Sa 5
#75 Tracto-Technik Gmbh & Co., Kg 5
#76 Upwing Energy 5
#77 U.S. Well Services 5
#78 Varel International Ind., L.L.C. 5
#79 IBM 5
#80 Aker Solutions As 4
#81 Betek Gmbh & Co. Kg 4
#82 Bly Ip 4
#83 Coiled Tubing Specialties 4
#84 Csi Technologies 4
#85 Dreco Energy Services Ulc 4
#86 Eog Resources 4
#87 Gyrodata, Incorporated 4
#88 Interra Energy Services 4
#89 Klx Energy Services 4
#90 Kobold 4
#91 Mako Rentals 4
#92 Morphpackers Limited 4
#93 Nippon Steel 4
#94 Reveal Energy Services 4
#95 Shandong University 4
#96 Single Buoy Moorings 4
#97 Statoil Gulf Services 4
#98 The Wellboss Company 4
#99 Weatherford Netherlands, B.V. 4
#100 Intel 4