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ข้อมูลสัญลักษณ์จำแนกการออกแบบผลิตภัณฑ์ระหว่างประเทศ

รหัส / code คำอธิบาย / code name Version
E21B0043250000 Methods for stimulating production (dump bailers E21B0027020000; vibration generating arrangements E21B0028000000; chemical compositions therefor C09K0008600000) 1
E21B0043260000 by forming crevices or fractures 1
E21B0043263000 using explosives 1
E21B0043267000 reinforcing fractures by propping 1
E21B0043270000 by use of eroding chemicals, e.g. acids 1
E21B0043280000 Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent (E21B0043241000 takes precedence);; 1
E21B0043285000 Melting minerals, e.g. sulfur (E21B0043240000 takes precedence;heating, cooling or insulating arrangements for wells E21B0036000000) 1
E21B0043290000 Obtaining a slurry of minerals, e.g. by using nozzles 1
E21B0043295000 Gasification of minerals, e.g. for producing mixtures of combustible gases (E21B0043243000 takes precedence);; 1
E21B0043300000 Specific pattern of wells, e.g. optimizing the spacing of wells (production satellite stations E21B0043017000) 1
E21B0043320000 Preventing gas- or water-coning phenomena, i.e. the formation of a conical column of gas or water around wells 1
E21B0043340000 Arrangements for separating materials produced by the well (separating apparatus per se, see the relevant subclasses);; 1
E21B0043360000 Underwater separating arrangements (E21B0043380000 takes precedence);; 1
E21B0043380000 in the well 1
E21B0043400000 Separation associated with re-injection of separated materials 1
จำนวนรหัสข้อมูล 15 จาก 73902