发明名称 Quality control for sucker rods
摘要 A method for testing fiberglass sucker rods wherein the rod is pulled to a predetermined stress level while measuring the load, elongation and acoustic emissions. The load versus displacement is plotted in real time while the measured values are used to calculate the modulus of elasticity for various load ranges. From the measurements and calculated modulus of elasticity the quality of the rod can be determined.
申请公布号 US4700577(A) 申请公布日期 1987.10.20
申请号 US19860917282 申请日期 1986.10.09
申请人 SHELL OIL COMPANY 发明人 TRIPP, HARLEY A.
分类号 G01N3/08;G01N29/14;G01N33/38;(IPC1-7):G01N3/08;G01H1/00 主分类号 G01N3/08
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