发明名称 Calibrated conduit caliper and method
摘要 A well conduit caliper tool which simultaneously measures the remaining wall thickness of a well conduit in situ and the minimum inside diameter of such conduit. A caliper feeler arm element which extends out the furthermost distance from the caliper tool activates a sensing element that produces the indication of remaining conduit wall thickness. Another caliper feeler arm element which extends out the least distance from the caliper tool activates another sensing element that produces the indication of the minimum inside diameter. At the earth's surface these indications are recorded on a continuous strip chart or log as the variation of such respective diameters through the interval of conduit measured by the caliper tool. Mechanical linkage wear compensation and linear mechanical movement through the linkage between the feeler arm elements and the sensing elements are provided. In conjunction with the caliper tool is a diameter calibration apparatus and method including a calibration tube adapted to fit about the caliper tool at the earth's surface. The calibration tool provides designated simulated remaining wall thickness and simulated minimum internal diameters as standards from which the caliper tool is calibrated at the earth's surface.
申请公布号 US4302881(A) 申请公布日期 1981.12.01
申请号 US19800135723 申请日期 1980.03.31
申请人 GEARHART INDUSTRIES, INC. 发明人 SCHWIND, EDWARD C.;HALLMARK, BOBBY J.
分类号 E21B47/08;G01B7/13;G01B7/287;(IPC1-7):G01B7/12;G01B7/28 主分类号 E21B47/08
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