Invention Grant
US07766101B2 System and method for making drilling parameter and or formation evaluation measurements during casing drilling 有权
在套管钻井过程中制作钻孔参数和/或地层评估测量的系统和方法

System and method for making drilling parameter and or formation evaluation measurements during casing drilling
Abstract:
A casing drilling system includes a casing having a drill bit at one end. The drill bit is capable of drilling subsurface formations and formed from a material removable by drilling or chemical exposure. The chemical is substantially harmless to the casing. The system includes a centralizer affixed to an interior of the casing. The centralizer includes a receptacle therein for engaging a measurement while drilling tool. The centralizer is formed from a material removable by drilling or chemical exposure, wherein the chemical is substantially harmless to the casing. The system includes a measurement while drilling tool configured to move along the interior of the casing and to engage with the centralizer. The tool includes a device to measure a drilling parameter or a formation parameter. The tool including a latch at an upper end thereof for engagement with a retrieval tool moved through the interior of the casing.
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