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Class Information
Number: 166/55
Name: Wells > Means for perforating, weakening, bending or separating pipe at an unprepared point
Description: Devices comprising means for perforating, weakening, bending or separating the side wall of a well pipe at a location in the pipe which has not been specially preconditioned for such action.










Sub-classes under this class:

Class Number Class Name Patents
166/55.6 Cutter rotates circumferentially of pipe 47
166/55.2 Perforating or splitting cutter 124
166/55.1 With disparate below ground feature 346


Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
8672031 Perforating with wired drill pipe Mar. 18, 2014
8622132 Method of perforating a wellbore Jan. 7, 2014
8616293 Tool positioning and latching system Dec. 31, 2013
8602102 Blowout preventers and methods of use Dec. 10, 2013
8579022 Apparatus for deploying and activating a downhole tool Nov. 12, 2013
8567427 Blowout preventers using plates propelled by explosive charges Oct. 29, 2013
8561683 Wellbore tubular cutter Oct. 22, 2013
8534957 Cold assisted pipe splitting and bursting Sep. 17, 2013
8517120 Perforation tool with switch Aug. 27, 2013
8490702 Downhole tool assembly with debris relief, and method for using same Jul. 23, 2013
8490701 Methods of releasing at least one tubing string below a blow-out preventer Jul. 23, 2013
8464785 Pipe guide arms for blind shear rams Jun. 18, 2013
8459358 Cutting dart and method of using the cutting dart Jun. 11, 2013
8424607 System and method for severing a tubular Apr. 23, 2013
8424455 Surface safe explosive tool Apr. 23, 2013
8424595 Method and apparatus for releasing a coiled tubing internal conduit from a bottom hole assembly Apr. 23, 2013
8424606 Method and apparatus for perforating with reduced debris in wellbore Apr. 23, 2013
8408286 Perforating string with longitudinal shock de-coupler Apr. 2, 2013
8397800 Perforating string with longitudinal shock de-coupler Mar. 19, 2013
8397814 Perforating string with bending shock de-coupler Mar. 19, 2013
8393392 Method and apparatus for perforating multiple wellbore intervals Mar. 12, 2013
8360156 Method and apparatus for preventing spillage or loss of drill fluids Jan. 29, 2013
8356666 Wellbore perforation tool Jan. 22, 2013
8353338 Well bore control valve Jan. 15, 2013
8347962 Non frangible perforating gun system Jan. 8, 2013
8336612 Severing of downhole tubing with associated cable Dec. 25, 2012
8322422 Method of removing a device in an annulus Dec. 4, 2012
8316872 Blowout preventer using a plate propelled by an explosive charge Nov. 27, 2012
8302693 Wireless downhole tool positioning system Nov. 6, 2012
8281860 Method and system for treating a subterranean formation Oct. 9, 2012
8272441 Wireless downhole tool positioning system Sep. 25, 2012
8256516 System and method for providing a downhole mechanical energy absorber Sep. 4, 2012
8245770 Method for perforating failure-prone formations Aug. 21, 2012
8225855 Surface equipment assembly for wellbore cable Jul. 24, 2012
8157022 Apparatus string for use in a wellbore Apr. 17, 2012
8136439 Explosive well tool firing head Mar. 20, 2012
8118098 Flow control system and method for use in a wellbore Feb. 21, 2012
8113271 Cutting tool for cutting a downhole tubular Feb. 14, 2012
RE43054 Method and apparatus for casing exit system using coiled tubing Jan. 3, 2012
8066070 Blowout preventers and methods of use Nov. 29, 2011
8056632 Downhole initiator for an explosive end device Nov. 15, 2011
8056633 Apparatus and method for removing subsea structures Nov. 15, 2011
8020619 Severing of downhole tubing with associated cable Sep. 20, 2011
7997332 Method and apparatus to remove a downhole drill collar from a well bore Aug. 16, 2011
7987901 Electrical control for a downhole system Aug. 2, 2011
7963342 Downhole isolation valve and methods for use Jun. 21, 2011
7926570 Method and apparatus for preventing spillage or loss of drill fluids Apr. 19, 2011
7926566 Method of making a downhole cutting tool, using a single piece tubular with a radially displaceable portion Apr. 19, 2011
7921924 System and method for controlling actuation of a well component Apr. 12, 2011
7918279 System and method for forming cavities in a well Apr. 5, 2011

1 2 3 4 5 6 7 8










 
 
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