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48 results about "Bed extension" patented technology

Downhole directional hole bedding guided drilling system and method based on formation lithology identification

ActiveCN106050143ASolve the unidentified stratumSolve drilling efficiencySurveyDirectional drillingLithologyCoal measures
The invention relates to a downhole directional hole bedding guided drilling system and method based on formation lithology identification. The lithology while-drilling identification of a drilling stratum is achieved through a direct parameter comparison method and an orientation radiating rose diagram comparison method according to coal measure stratum lithology while-drilling identification criteria and the stratum natural radiation value, measured by a coal measure stratum physical property parameter while-drilling measurement device in real time, of the near-bit position. By combination with measurement of a drilling track, precise space positioning of a practical drilling track relative to a target stratum is achieved, and bases are provided for controlling a downhole directional hole to do bedding extension in the target stratum in the preset direction; the technical problems that an existing underground coal mine directional drilling technology can only conduct drilling according to the space geometric positioning of the drilling track, cannot distinguish strata and is poor in drilling efficiency and low in target stratum elongation are solved; and through precise bedding directional drilling of the downhole directional hole, an effective means is provided for improving the drilling construction efficiency and the utilization effect, verifying the stratum geological information of a mine lot and ensuring drilling construction safety.
Owner:XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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