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Class Information
Number: 175/309
Name: Boring or penetrating the earth > With receptacle > Removable or insertable through below-ground tool shaft
Description: Apparatus in which the receptacle means may be inserted in and withdrawn from a hollow tool shaft at any time during operation of the boring means.

Patents under this class:

Patent Number Title Of Patent Date Issued
8149132 System and method for hard line communication with MWD/LWD Apr. 3, 2012
7845431 Retrieval tool with slips for retrieving bottom hole assembly during casing while drilling operations Dec. 7, 2010
7117939 Percussion hammer bit retainer apparatus Oct. 10, 2006
7100710 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells Sep. 5, 2006
7013997 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells Mar. 21, 2006
6962215 Underbalanced well completion Nov. 8, 2005
6655475 Product and method for treating well bores Dec. 2, 2003
6047782 Assembly and method for extracting discrete soil samples Apr. 11, 2000
5954146 System for in situ replacement of cutting means for a ground drill Sep. 21, 1999
5337838 Method and an apparatus for taking and analyzing level determined samples of pore gas/liquid from a subterranean formation Aug. 16, 1994
4790395 Pipe-driving apparatus Dec. 13, 1988
4336849 Earth drilling device for extracting earth samples Jun. 29, 1982
4006777 Free floating carrier for deep well instruments Feb. 8, 1977

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