| Utility: LOW VISCOSITY POLY-A-OLEFIN LUBRICATING OIL AND SYNTHESIS METHOD THEREOF Filling date: 7 Sep 2025 Issue date: 18 Jun 2020 | 24 Oct 2019 | 18 Jun 2020 |
| Utility: Nano-silica dispersion having amphiphilic properties and a double-particle structure and its production method Filling date: 7 Sep 2025 Issue date: 16 Jun 2020 | 30 Mar 2018 | 16 Jun 2020 |
| Utility: Liquid-phase hydroisomerization system and process therefor and use thereof Filling date: 7 Sep 2025 Issue date: 16 Jun 2020 | 8 Jun 2016 | 16 Jun 2020 |
| Utility: Amphiphilic molecular sieve containing lipophilic group on the outside and hydrophilic group on the inside and production method thereof Filling date: 7 Sep 2025 Issue date: 12 May 2020 | 6 Jul 2018 | 12 May 2020 |
| Utility: Method and device for determining karst development degree of reservoir, computer readable storage medium and device Filling date: 7 Sep 2025 Issue date: 5 May 2020 | 25 May 2018 | 5 May 2020 |
| Utility: Method and device for detecting damage rate of an inner coating of a downhole oil casing Filling date: 7 Sep 2025 Issue date: 5 May 2020 | 21 Mar 2018 | 5 May 2020 |
| Utility: Physical Simulation Experimental Device and Method for Water Invasion and Drainage Gas Recovery in Gas Reservoirs Filling date: 7 Sep 2025 Issue date: 30 Apr 2020 | 25 Oct 2019 | 30 Apr 2020 |
| Utility: METHODS AND DEVICES FOR DETECTING MERCURY ISOTOPES IN OIL-GAS SOURCES Filling date: 7 Sep 2025 Issue date: 30 Apr 2020 | 24 Apr 2019 | 30 Apr 2020 |
| Utility: METHODS AND DEVICES FOR DETECTING MERCURY ISOTOPES IN CRUDE OIL Filling date: 7 Sep 2025 Issue date: 30 Apr 2020 | 19 Apr 2019 | 30 Apr 2020 |
| Utility: METHODS AND DEVICES FOR DETECTING MERCURY ISOTOPES IN NATURAL GAS Filling date: 7 Sep 2025 Issue date: 30 Apr 2020 | 19 Apr 2019 | 30 Apr 2020 |
| Utility: DEVICE AND METHOD FOR DETERMINING SOLUBILITY OF ELEMENTAL SULFUR IN SULFUR-CONTAINING GAS Filling date: 7 Sep 2025 Issue date: 30 Apr 2020 | 25 May 2018 | 30 Apr 2020 |
| Utility: MICROBUBBLE GENERATION DEVICE AND EQUIPMENT Filling date: 7 Sep 2025 Issue date: 23 Apr 2020 | 30 May 2019 | 23 Apr 2020 |
| Utility: STRATIFIED WATERFLOODING APPARATUS Filling date: 7 Sep 2025 Issue date: 16 Apr 2020 | 1 Aug 2019 | 16 Apr 2020 |
| Utility: METHOD FOR ACQUIRING CONVERTED WAVE, ELECTRONIC DEVICE AND READABLE STORAGE MEDIUM Filling date: 7 Sep 2025 Issue date: 2 Apr 2020 | 20 May 2019 | 2 Apr 2020 |
| Utility: Method for determining oil contents in rock formations Filling date: 7 Sep 2025 Issue date: 24 Mar 2020 | 31 Aug 2017 | 24 Mar 2020 |
| Utility: LINEAR HIERARCHICAL STRUCTURE LITHIUM TITANATE MATERIAL, PREPARATION AND APPLICATION THEREOF Filling date: 7 Sep 2025 Issue date: 12 Mar 2020 | 5 Sep 2019 | 12 Mar 2020 |
| Utility: Linear porous lithium titanate material, preparation and product thereof Filling date: 7 Sep 2025 Issue date: 5 Mar 2020 | 30 Aug 2019 | 5 Mar 2020 |
| Utility: Linear Porous Titanium Dioxide Material And Preparation And Use Thereof Filling date: 7 Sep 2025 Issue date: 5 Mar 2020 | 29 Aug 2019 | 5 Mar 2020 |
| Utility: PROCESS FOR PREPARING TITANIC ACID SALT, TITANIC ACID, AND TITANIUM OXIDE HAVING CONTROLLABLE PARTICLE SIZE AND HIERARCHICAL STRUCTURE Filling date: 7 Sep 2025 Issue date: 5 Mar 2020 | 29 Aug 2019 | 5 Mar 2020 |
| Utility: PREPARATION METHOD OF A NANOTUBE HIERARCHICALLY STRUCTURED LITHIUM TITANATE AND USE AND PRODUCT THEREOF Filling date: 7 Sep 2025 Issue date: 5 Mar 2020 | 29 Aug 2019 | 5 Mar 2020 |
| Utility: Nanostructured titanic acid salts and preparation process and use thereof Filling date: 7 Sep 2025 Issue date: 5 Mar 2020 | 29 Aug 2019 | 5 Mar 2020 |
| Utility: ULTRASONIC MICROBUBBLE GENERATION METHOD, APPARATUS AND SYSTEM Filling date: 7 Sep 2025 Issue date: 5 Mar 2020 | 21 Aug 2019 | 5 Mar 2020 |
| Utility: Methods for Synthesizing Mesoporous Zeolite ETS-10 Containing Metal Without a Templating Agent Filling date: 7 Sep 2025 Issue date: 5 Mar 2020 | 13 May 2019 | 5 Mar 2020 |
| Utility: SYSTEM AND METHOD OF PERFORMING OIL DISPLACEMENT BY WATER-GAS DISPERSION SYSTEM Filling date: 7 Sep 2025 Issue date: 5 Mar 2020 | 20 Mar 2019 | 5 Mar 2020 |
| Utility: Omnidirectional vector seismic data processing method and apparatus, computer-readable storage medium and device Filling date: 7 Sep 2025 Issue date: 3 Mar 2020 | 27 Apr 2018 | 3 Mar 2020 |
| Utility: METALLOCENE COMPLEX WITH A HETEROATOM-CONTAINING PI-LIGAND AND PREPARATION METHOD THEREFOR, CATALYST SYSTEM CONTAINING THE SAME AND USE THEREOF Filling date: 7 Sep 2025 Issue date: 27 Feb 2020 | 1 Nov 2019 | 27 Feb 2020 |
| Utility: METHOD AND APPARATUS FOR AUTOMATICALLY EXTRACTING IMAGE FEATURES OF ELECTRICAL IMAGING WELL LOGGING Filling date: 7 Sep 2025 Issue date: 27 Feb 2020 | 10 Jul 2019 | 27 Feb 2020 |
| Utility: METHOD AND APPARATUS FOR AUTOMATICALLY RECOGNIZING ELECTRICAL IMAGING WELL LOGGING FACIES Filling date: 7 Sep 2025 Issue date: 27 Feb 2020 | 9 Jul 2019 | 27 Feb 2020 |
| Utility: Surfactant that changes the wettability of tight sandstone and its preparation method and application Filling date: 7 Sep 2025 Issue date: 28 Jan 2020 | 18 Apr 2018 | 28 Jan 2020 |
| Utility: METHOD, APPARATUS AND SYSTEM FOR DETERMINING SWEET SPOT REGION FOR SHALE OIL IN-SITU CONVERSION DEVELOPMENT Filling date: 7 Sep 2025 Issue date: 16 Jan 2020 | 11 Jul 2019 | 16 Jan 2020 |
| Utility: SHALE OIL IN-SITU LIGHTENING DEVELOPMENT METHOD, APPARATUS AND SYSTEM Filling date: 7 Sep 2025 Issue date: 16 Jan 2020 | 11 Jul 2019 | 16 Jan 2020 |
| Utility: Method for determining maturity in oil source rock by total scanning fluorescence and the device therefor Filling date: 7 Sep 2025 Issue date: 14 Jan 2020 | 25 Oct 2018 | 14 Jan 2020 |
| Utility: METHOD AND CATALYST FOR SELECTIVE OLIGOMERIZATION OF ETHYLENE Filling date: 7 Sep 2025 Issue date: 26 Dec 2019 | 19 Jun 2019 | 26 Dec 2019 |
| Utility: METHOD AND DEVICE FOR PREDICTING CHANGE IN WATER CUT RISING RATE IN WATER-DRIVE OIL RESERVOIR Filling date: 7 Sep 2025 Issue date: 19 Dec 2019 | 23 Jan 2019 | 19 Dec 2019 |
| Utility: Resistivity Measurement Method, Device and System Filling date: 7 Sep 2025 Issue date: 5 Dec 2019 | 31 May 2019 | 5 Dec 2019 |
| Utility: Single-Side Modified Beta-Anderson-Type Heteropolymolybdate Organic Derivatives Filling date: 7 Sep 2025 Issue date: 21 Nov 2019 | 15 May 2019 | 21 Nov 2019 |
| Utility: CHELATING AGENT FOR RESERVOIR ACIDIFICATION AND STIMULATING INJECTION AND ITS PREPARATION METHOD AND APPLICATION Filling date: 7 Sep 2025 Issue date: 31 Oct 2019 | 23 Jan 2019 | 31 Oct 2019 |
| Utility: INJECTION STIMULATION AGENT FOR WATER INJECTION WELL AND THE PREPARATION METHOD AND APPLICATION THEREOF Filling date: 7 Sep 2025 Issue date: 17 Oct 2019 | 21 Dec 2018 | 17 Oct 2019 |
| Utility: Fracturing Process Filling date: 7 Sep 2025 Issue date: 3 Oct 2019 | 27 Mar 2019 | 3 Oct 2019 |
| Utility: Phase Transition Material Fluid and Proppant Formed Therefrom Filling date: 7 Sep 2025 Issue date: 3 Oct 2019 | 27 Mar 2019 | 3 Oct 2019 |
| Utility: APPARATUS AND METHOD FOR DETERMINING VOLUME STABILITY OF WELL CEMENT Filling date: 7 Sep 2025 Issue date: 3 Oct 2019 | 30 Nov 2018 | 3 Oct 2019 |
| Utility: METHOD FOR IN-DEPTH PROFILE CONTROL AND DISPLACEMENT OF LOW-PERMEABILITY OIL RESERVOIRS Filling date: 7 Sep 2025 Issue date: 26 Sep 2019 | 18 Jan 2019 | 26 Sep 2019 |
| Utility: METHOD, APPARATUS, AND SYSTEM FOR ELIMINATING FREQUENCY DISPERSION EFFECT Filling date: 7 Sep 2025 Issue date: 26 Sep 2019 | 22 Aug 2018 | 26 Sep 2019 |
| Utility: DOWNHOLE POWER GENERATION DEVICE AND SEPARATE-ZONE WATERFLOODING DEVICE Filling date: 7 Sep 2025 Issue date: 26 Sep 2019 | 2 Aug 2018 | 26 Sep 2019 |
| Utility: Method and device for testing wettability of dense oil reservoir Filling date: 7 Sep 2025 Issue date: 24 Sep 2019 | 18 Apr 2017 | 24 Sep 2019 |
| Utility: Diverting Agent For Diversion Acidizing In Water Injection Wells And A Preparation Method Thereof Filling date: 7 Sep 2025 Issue date: 12 Sep 2019 | 4 Jan 2019 | 12 Sep 2019 |
| Utility: On-Line Diverting Acid For Continuous Injection Into Water Injection Wells And A Preparation Method Thereof Filling date: 7 Sep 2025 Issue date: 12 Sep 2019 | 4 Jan 2019 | 12 Sep 2019 |
| Utility: Method and Apparatus for Determining Oil Output Quantity and Gas Output Quantity of Shale Oil In-Situ Conversion Filling date: 7 Sep 2025 Issue date: 5 Sep 2019 | 28 Feb 2019 | 5 Sep 2019 |
| Utility: METHOD AND DEVICE FOR DETERMINING ELASTICITY OF CEMENT STONE UTILIZED IN WELL CEMENTING OF OIL-GAS WELL Filling date: 7 Sep 2025 Issue date: 5 Sep 2019 | 31 Oct 2017 | 5 Sep 2019 |
| Utility: Method and device for measuring formation elemental capture gamma ray spectra Filling date: 7 Sep 2025 Issue date: 3 Sep 2019 | 5 Feb 2018 | 3 Sep 2019 |
