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Class Information
Number: 137/315.02
Name: Fluid handling > With repair, tapping, assembly, or disassembly means > Blow out preventer or choke valve device (e.g., oil well flow controlling device, etc.)
Description:










Patents under this class:

Patent Number Title Of Patent Date Issued
8622139 Emergency subsea wellhead closure devices Jan. 7, 2014
8176933 Annular BOP packing unit May. 15, 2012
8166993 Method and systems for using a shim plate for increased strength May. 1, 2012
7331562 Blowout preventer with breech assembly Feb. 19, 2008
6557577 Threaded union safety device and method May. 6, 2003
6446664 Erosion resistant wear sleeve for high pressure valves Sep. 10, 2002
6276386 Charging device for hydraulic systems Aug. 21, 2001
5645098 Low profile and lightweight high pressure blowout preventer Jul. 8, 1997
5638855 Low profile and lightweight high pressure blowout preventer Jun. 17, 1997
5509435 Non-leaking valve Apr. 23, 1996
5241980 Oil field choke apparatus Sep. 7, 1993
5065787 Choke valve safety device Nov. 19, 1991
4926898 Safety choke valve May. 22, 1990
4738275 Cartridge puller for hot and cold water mixing valve Apr. 19, 1988
4705062 Choke and improved needle tip therefor Nov. 10, 1987
4699350 Valve and a process for removing a closure member of the valve Oct. 13, 1987
4504037 Ram blowout preventer securing and retracting apparatus Mar. 12, 1985
4503879 Plug mechanism for wellhead tool Mar. 12, 1985
4503878 Choke valve Mar. 12, 1985
4470430 Drilling choke Sep. 11, 1984
4442892 Apparatus for stabbing and threading a safety valve into a well pipe Apr. 17, 1984
4337788 High pressure valve Jul. 6, 1982
4133342 Method of replacing seals in a well ram type blow out preventer Jan. 9, 1979











 
 
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