| Utility: Shale oil in-situ lightening development method, apparatus and system Filling date: 8 Sep 2025 Issue date: 4 May 2021 | 11 Jul 2019 | 4 May 2021 |
| Utility: Phase transition material fluid and proppant formed therefrom Filling date: 8 Sep 2025 Issue date: 20 Apr 2021 | 27 Mar 2019 | 20 Apr 2021 |
| Utility: Method for determining effective porosity of high clay-bearing rock core, computer device and computer readable storage medium Filling date: 8 Sep 2025 Issue date: 13 Apr 2021 | 30 Dec 2019 | 13 Apr 2021 |
| Utility: Injection stimulation agent for water injection well and the preparation method and application thereof Filling date: 8 Sep 2025 Issue date: 13 Apr 2021 | 21 Dec 2018 | 13 Apr 2021 |
| Utility: Acoustic sensor for rock crack detection Filling date: 8 Sep 2025 Issue date: 13 Apr 2021 | 25 Jun 2018 | 13 Apr 2021 |
| Utility: On-line diverting acid for continuous injection into water injection wells and a preparation method thereof Filling date: 8 Sep 2025 Issue date: 30 Mar 2021 | 4 Jan 2019 | 30 Mar 2021 |
| Utility: Method of acquiring rock component content of stratum Filling date: 8 Sep 2025 Issue date: 30 Mar 2021 | 30 Mar 2018 | 30 Mar 2021 |
| Utility: SHALE OIL ANALYSIS METHOD AND APPARATUS FOR CONTINUOUSLY CHARACTERIZING SATURATION OF ADSORBED OIL AND FREE OIL Filling date: 8 Sep 2025 Issue date: 18 Mar 2021 | 30 Dec 2019 | 18 Mar 2021 |
| Utility: METHOD FOR DETERMINING EFFECTIVE POROSITY OF HIGH CLAY-BEARING ROCK CORE, COMPUTER DEVICE AND COMPUTER READABLE STORAGE MEDIUM Filling date: 8 Sep 2025 Issue date: 11 Mar 2021 | 30 Dec 2019 | 11 Mar 2021 |
| Utility: Monitoring system for deformations and destructions of gas storage Filling date: 8 Sep 2025 Issue date: 2 Mar 2021 | 25 Jun 2018 | 2 Mar 2021 |
| Utility: Olefin coordination polymerization catalyst and use thereof Filling date: 8 Sep 2025 Issue date: 23 Feb 2021 | 12 Oct 2018 | 23 Feb 2021 |
| Utility: Method and device for determining elasticity of cement stone utilized in well cementing of oil-gas well Filling date: 8 Sep 2025 Issue date: 23 Feb 2021 | 31 Oct 2017 | 23 Feb 2021 |
| Utility: Method for in-depth profile control and displacement of low-permeability oil reservoirs Filling date: 8 Sep 2025 Issue date: 16 Feb 2021 | 18 Jan 2019 | 16 Feb 2021 |
| Utility: Method, apparatus, and system for eliminating frequency dispersion effect Filling date: 8 Sep 2025 Issue date: 16 Feb 2021 | 22 Aug 2018 | 16 Feb 2021 |
| Utility: METHOD FOR IDENTIFYING BOUNDARY OF SEDIMENTARY FACIES, COMPUTER DEVICE AND COMPUTER READABLE STORAGE MEDIUM Filling date: 8 Sep 2025 Issue date: 11 Feb 2021 | 7 Aug 2020 | 11 Feb 2021 |
| Utility: METHOD AND APPARATUS FOR OIL PRODUCTION BY INCREASING RESISTANCE OF BOREHOLE WALL WITH IMPROVED ENERGY UTILIZATION RAE OF INJECTION GAS Filling date: 8 Sep 2025 Issue date: 11 Feb 2021 | 20 Mar 2020 | 11 Feb 2021 |
| Utility: GASFLOW DISTRIBUTION DEVICE, GAS DISTRIBUTOR, PIPE STRING AND METHOD FOR SEPARATE-LAYER GAS INJECTION Filling date: 8 Sep 2025 Issue date: 14 Jan 2021 | 15 Apr 2020 | 14 Jan 2021 |
| Utility: METHOD AND APPARATUS FOR DETERMINING OIL-GAS-WATER INTERFACE BASED ON FORMATION PRESSURE EQUIVALENT DENSITY Filling date: 8 Sep 2025 Issue date: 14 Jan 2021 | 26 Mar 2020 | 14 Jan 2021 |
| Utility: Layered water injection system and layered water injection method Filling date: 8 Sep 2025 Issue date: 12 Jan 2021 | 30 Oct 2018 | 12 Jan 2021 |
| Utility: Downhole power generation device and separate-zone waterflooding device Filling date: 8 Sep 2025 Issue date: 12 Jan 2021 | 2 Aug 2018 | 12 Jan 2021 |
| Utility: Method and apparatus for measuring oil content of tight reservoir based on nuclear magnetic resonance Filling date: 8 Sep 2025 Issue date: 5 Jan 2021 | 11 Oct 2018 | 5 Jan 2021 |
| Utility: Chelating agent for reservoir acidification and stimulating injection and its preparation method and application Filling date: 8 Sep 2025 Issue date: 29 Dec 2020 | 23 Jan 2019 | 29 Dec 2020 |
| Utility: Well Cementing Method for Improving Well Cementing Quality by Controlling Hydration Heat of Cement Slurry Filling date: 8 Sep 2025 Issue date: 24 Dec 2020 | 21 Apr 2020 | 24 Dec 2020 |
| Utility: Method and apparatus for determining flow rates of components of multiphase fluid Filling date: 8 Sep 2025 Issue date: 15 Dec 2020 | 18 May 2018 | 15 Dec 2020 |
| Utility: Arylaminosilane Compound, Propylene Polymerization Catalyst And Preparation Thereof Filling date: 8 Sep 2025 Issue date: 26 Nov 2020 | 8 Apr 2020 | 26 Nov 2020 |
| Utility: Method and device of identifying fracture Filling date: 8 Sep 2025 Issue date: 24 Nov 2020 | 23 Jan 2018 | 24 Nov 2020 |
| Utility: Methods and devices for detecting mercury isotopes in crude oil Filling date: 8 Sep 2025 Issue date: 27 Oct 2020 | 19 Apr 2019 | 27 Oct 2020 |
| Utility: Spherical supported transition metal catalyst Filling date: 8 Sep 2025 Issue date: 20 Oct 2020 | 19 Feb 2016 | 20 Oct 2020 |
| Utility: SEISMIC FULL HORIZON TRACKING METHOD, COMPUTER DEVICE AND COMPUTER-READABLE STORAGE MEDIUM Filling date: 8 Sep 2025 Issue date: 15 Oct 2020 | 8 Apr 2020 | 15 Oct 2020 |
| Utility: Composition of nano-emulsion having small particle size and ultra-low concentration and a preparation method thereof Filling date: 8 Sep 2025 Issue date: 13 Oct 2020 | 13 Dec 2018 | 13 Oct 2020 |
| Utility: Rock mechanics experiment system for simulating deep-underground environment Filling date: 8 Sep 2025 Issue date: 13 Oct 2020 | 16 Jul 2018 | 13 Oct 2020 |
| Utility: Palladium-based supported hydrogenation catalyst, and preparation method and application thereof Filling date: 8 Sep 2025 Issue date: 13 Oct 2020 | 15 Jun 2018 | 13 Oct 2020 |
| Utility: Pressure-reducing and injection-enhancing anti scaling agent for low-permeability water-injection well and preparation method thereof Filling date: 8 Sep 2025 Issue date: 13 Oct 2020 | 29 Dec 2017 | 13 Oct 2020 |
| Utility: Acoustic emission sensor Filling date: 8 Sep 2025 Issue date: 6 Oct 2020 | 25 Jun 2018 | 6 Oct 2020 |
| Utility: Calculation method for dynamic fluid loss of acid-etched fracture considering wormhole propagation Filling date: 8 Sep 2025 Issue date: 24 Sep 2020 | 11 Jun 2020 | 24 Sep 2020 |
| Utility: A Regeneration Method For Liquefied Petroleum Gas Sweetening Caustic Filling date: 8 Sep 2025 Issue date: 17 Sep 2020 | 12 Apr 2019 | 17 Sep 2020 |
| Utility: Single-side modified .beta.-Anderson-type heteropolymolybdate organic derivatives Filling date: 8 Sep 2025 Issue date: 1 Sep 2020 | 15 May 2019 | 1 Sep 2020 |
| Utility: Amphiphilic molecular sieve containing hydrophilic group on the outside and lipophilic group on the inside and production method threof Filling date: 8 Sep 2025 Issue date: 1 Sep 2020 | 6 Jul 2018 | 1 Sep 2020 |
| Utility: Omnidirectional vector geophone Filling date: 8 Sep 2025 Issue date: 11 Aug 2020 | 27 Apr 2018 | 11 Aug 2020 |
| Utility: Method for Determining Gas Saturation of Tight Reservoir Filling date: 8 Sep 2025 Issue date: 6 Aug 2020 | 30 Jan 2020 | 6 Aug 2020 |
| Utility: Exploitation method and exploitation well pattern for coalbed methane in low-permeability coalbed Filling date: 8 Sep 2025 Issue date: 4 Aug 2020 | 25 Feb 2019 | 4 Aug 2020 |
| Utility: Omnidirectional vector electrostatic levitation geophone Filling date: 8 Sep 2025 Issue date: 21 Jul 2020 | 27 Apr 2018 | 21 Jul 2020 |
| Utility: Methods for synthesizing mesoporous zeolite ETS-10 containing metal without a templating agent Filling date: 8 Sep 2025 Issue date: 14 Jul 2020 | 13 May 2019 | 14 Jul 2020 |
| Utility: DOWNHOLE OIL, GAS, WATER AND SAND SEPARATION METHOD AND SEPARATOR Filling date: 8 Sep 2025 Issue date: 9 Jul 2020 | 12 Jan 2018 | 9 Jul 2020 |
| Utility: Method and apparatus for processing seismic data Filling date: 8 Sep 2025 Issue date: 7 Jul 2020 | 29 Jan 2018 | 7 Jul 2020 |
| Utility: N,N,N',N'-TETRADODECYL-SUBSTITUTED DIPHENYL ETHER SULFONATE ANIONIC GEMINI SURFACTANT AND SYNTHESIS METHOD THEREOF Filling date: 8 Sep 2025 Issue date: 2 Jul 2020 | 22 Nov 2019 | 2 Jul 2020 |
| Utility: Nonionic Gemini surfactant of (Octylphenol polyoxyethylene ether disubstituted) dicarboxylic acid diphenyl ether and its synthesis method Filling date: 8 Sep 2025 Issue date: 2 Jul 2020 | 22 Nov 2019 | 2 Jul 2020 |
| Utility: Core-shell structured anionic nano microemulsion system, and preparation and application thereof Filling date: 8 Sep 2025 Issue date: 2 Jul 2020 | 22 Nov 2019 | 2 Jul 2020 |
| Utility: CORE-SHELL STRUCTURED NON-IONIC NANOEMULSION SYSTEM AND PREPARATION AND USE THEREOF Filling date: 8 Sep 2025 Issue date: 2 Jul 2020 | 22 Nov 2019 | 2 Jul 2020 |
| Utility: PREDICTION METHOD FOR SHALE OIL AND GAS SWEET SPOT REGION, COMPUTER DEVICE AND COMPUTER READABLE STORAGE MEDIUM Filling date: 8 Sep 2025 Issue date: 2 Jul 2020 | 17 Sep 2019 | 2 Jul 2020 |
