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Class Information
Number: 175/328
Name: Boring or penetrating the earth > Bit or bit element > Magnetized or with magnet
Description: Apparatus in which the bit is provided with a magnet or with a magnetized portion.










Patents under this class:

Patent Number Title Of Patent Date Issued
8689889 Downhole magnet tool and method of assembly Apr. 8, 2014
8616306 Polycrystalline diamond compacts, method of fabricating same, and various applications Dec. 31, 2013
8353349 Retaining and isolating mechanisms for magnets in a magnetic cleaning tool Jan. 15, 2013
8336626 Downhole magnetic retrieval devices with fixed magnetic arrays Dec. 25, 2012
8297382 Polycrystalline diamond compacts, method of fabricating same, and various applications Oct. 30, 2012
7866418 Rotary drill bit including polycrystalline diamond cutting elements Jan. 11, 2011
7513299 Magnetic tool for retrieving metal objects from a well bore when using coil tubing Apr. 7, 2009
7510031 Directional drilling control Mar. 31, 2009
6491117 Apparatus for retrieving metal debris from a well bore Dec. 10, 2002
6357539 Apparatus for retrieving metal objects from a wellbore Mar. 19, 2002
6354386 Apparatus for retrieving metal objects from a wellbore Mar. 12, 2002
6308781 Apparatus for retrieving metal objects from a wellbore Oct. 30, 2001
6216787 Apparatus for retrieving metal objects from a wellbore Apr. 17, 2001
4296822 Multipurpose fluid flow assisted downhole tool Oct. 27, 1981
4226285 Magnetic junk retriever Oct. 7, 1980
4125167 Big hole bit Nov. 14, 1978











 
 
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