Internal casing wiper for an oil field well bore hole

摘要: The invention provides for an improved internal casing wiper tool 10 designed to wipe the sides of a well bore hole 30 in order remove debris 60 contained thereon and further fluid found 30. present includes first chamber 210 collecting larger sized pieces 430 second 300 smaller 440 as is lowered into elongated pipe 100 having its upper end 310 connected lower 350 drilling string 20 internally containing chambers, plurality centralizers 130 are disclosed around tube substantially centering hole, petal basket 110 102 outwardly extending petals 120 periphery wiping dislodge guide with 100, filter 160 located at predetermined distance 150 from separates out 230 above separating 60, check valve 320 permits cleaned flow back