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Class Information
Number: 175/325.4
Name: Boring or penetrating the earth > With tool shaft detail > Shaft carried guide or protector > Coupled between shaft sections or bit and shaft section > Having removable inserts
Description: Apparatus where a bore wall contacting portion is readily placed in or removed from a slot or an aperture in the guide or protector means.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8689877 Downhole tool Apr. 8, 2014
8678091 Magnetic retrieval apparatus and method for retaining magnets on a downhole magnetic retrieval apparatus Mar. 25, 2014
8672030 System for cementing tubulars comprising a mud motor Mar. 18, 2014
8622153 Downhole assembly Jan. 7, 2014
8434571 Securement of lines to downhole well tools May. 7, 2013
8205687 Compound engagement profile on a blade of a down-hole stabilizer and methods therefor Jun. 26, 2012
8083011 Matrix turbine sleeve and method for making same Dec. 27, 2011
7954567 Adjustable winged centering tool for use in pipes with varying diameter Jun. 7, 2011
7650952 Passive vertical drilling motor stabilization Jan. 26, 2010
7600587 Wear resistant sleeve for sub assembly Oct. 13, 2009
7458430 Attachment means for drilling equipment Dec. 2, 2008
7395881 Roller subs Jul. 8, 2008
7188689 Variable gauge drilling apparatus and method of assembly therefor Mar. 13, 2007
7048064 Multi-unit centralizer May. 23, 2006
6957708 Electrical imaging in conductive and non-conductive mud Oct. 25, 2005
6899174 Floating instrument insert for a tool May. 31, 2005
6851489 Method and apparatus for drilling wells Feb. 8, 2005
6830103 Roller subs Dec. 14, 2004
6776247 Stabilizer tool block wear pad assembly Aug. 17, 2004
6343648 Down-hole tool with detachable cleaning pads Feb. 5, 2002
6223840 Cutting bed impeller May. 1, 2001
6102142 Drilling tool with shock absorbers Aug. 15, 2000
6098727 Electrically insulating gap subassembly for downhole electromagnetic transmission Aug. 8, 2000
5937957 Cutting bed impeller Aug. 17, 1999
5868212 Stabiliser tool Feb. 9, 1999
5803194 Wear protector for a drilling tool Sep. 8, 1998
5788000 Stabilizer-reamer for drilling an oil well Aug. 4, 1998
5474143 Drill bit reamer stabilizer Dec. 12, 1995
5447207 Downhole tool Sep. 5, 1995
5343964 Petroleum, gas or geothermal driling apparatus Sep. 6, 1994
5339914 Adjustable drilling mechanism Aug. 23, 1994
5224558 Down hole drilling tool control mechanism Jul. 6, 1993
5058689 Wear protective means for a drilling tool Oct. 22, 1991
5042600 Drill pipe with helical ridge for drilling highly angulated wells Aug. 27, 1991
5012863 Pipe milling tool blade and method of dressing same May. 7, 1991
4995466 Method and device for stabilizing the path of a drilling tool Feb. 26, 1991
4958692 Downhole stabilizers Sep. 25, 1990
4877092 Near bit offset stabilizer Oct. 31, 1989
4862974 Downhole drilling assembly, apparatus and method utilizing drilling motor and stabilizer Sep. 5, 1989
4854403 Stabilizer for deep well drilling tools Aug. 8, 1989
4854399 Tubular element for use in a rotary drilling assembly Aug. 8, 1989
4848490 Downhole stabilizers Jul. 18, 1989
4848488 Method and device for adjusting the path of a drilling tool fixed to the end of a set of rods Jul. 18, 1989
4844178 Drilling device having a controlled path Jul. 4, 1989
4842083 Drill bit stabilizer Jun. 27, 1989
4821817 Actuator for an appliance associated with a ducted body, especially a drill rod Apr. 18, 1989
4776410 Stabilizing tool for well drilling Oct. 11, 1988
4754821 Locking device Jul. 5, 1988
4739843 Apparatus for lateral drilling in oil and gas wells Apr. 26, 1988
4710074 Casing mill Dec. 1, 1987

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