Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Packaging & Containers
Class Information
Number: 166/322
Name: Wells > Valves, closures or changeable restrictors > Fluid operated > Fluid pressure biased to open position position > Retrievable
Description: Devices in which the valve is insertable and retrievable from the flow line, seats in position in the flow line and is usually held in position by a latch means.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8256508 Downhole safety valve apparatus and method Sep. 4, 2012
8220534 Safety device for an oil well and associated safety installation Jul. 17, 2012
8100181 Surface controlled subsurface safety valve having integral pack-off Jan. 24, 2012
8056637 Subsurface safety valve and method for chemical injection into a wellbore Nov. 15, 2011
7963334 Method and apparatus for continuously injecting fluid in a wellbore while maintaining safety valve operation Jun. 21, 2011
7913769 Downhole safety valve apparatus and method Mar. 29, 2011
7886830 Downhole safety valve apparatus and method Feb. 15, 2011
7823648 Downhole safety valve apparatus and method Nov. 2, 2010
7775291 Retrievable surface controlled subsurface safety valve Aug. 17, 2010
7743787 Mud saver valve with magnetic latching Jun. 29, 2010
7712537 Method and apparatus for continuously injecting fluid in a wellbore while maintaining safety valve operation May. 11, 2010
7658229 Gas lift chamber purge and vent valve and pump systems Feb. 9, 2010
7637326 Downhole safety valve apparatus and method Dec. 29, 2009
7617876 Formation isolation valve and method of use Nov. 17, 2009
7475733 Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve Jan. 13, 2009
7347272 Formation isolation valve Mar. 25, 2008
7249635 Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve Jul. 31, 2007
7048079 Mud saver valve May. 23, 2006
7032672 Subsurface safety valve having a communication tool accessible non annular hydraulic chamber Apr. 25, 2006
7021385 Method and apparatus for controlling well pressure in open-ended casing Apr. 4, 2006
6978842 Volume compensated shifting tool Dec. 27, 2005
6953093 Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve Oct. 11, 2005
6880641 Subsurface safety valve and method for communicating hydraulic fluid therethrough Apr. 19, 2005
6742595 Subsurface safety valve lock out and communication tool and method for use of the same Jun. 1, 2004
6715557 Tool string Apr. 6, 2004
6695049 Valve assembly for hydrocarbon wells Feb. 24, 2004
6691787 Gas operated pump for use in a wellbore Feb. 17, 2004
6659185 Subsurface safety valve lock out and communication tool and method for use of the same Dec. 9, 2003
6523614 Subsurface safety valve lock out and communication tool and method for use of the same Feb. 25, 2003
6352118 System and method for communication hydraulic control to a wireline retrievable downhole device Mar. 5, 2002
6269883 Disconnect tool Aug. 7, 2001
6202747 Hydraulic well packer and method Mar. 20, 2001
6082455 Combination side pocket mandrel flow measurement and control assembly Jul. 4, 2000
5842521 Downhole pressure relief valve for well pump Dec. 1, 1998
5771974 Test tree closure device for a cased subsea oil well Jun. 30, 1998
5318127 Surface controlled annulus safety system for well bores Jun. 7, 1994
5314026 Landing nipple May. 24, 1994
5303774 Ring seal packer Apr. 19, 1994
5293943 Safety valve, sealing ring and seal assembly Mar. 15, 1994
5285850 Well completion system for oil and gas wells Feb. 15, 1994
5193615 Apparatus for use in controlling flow through a tubing string suspended and packed off within well bore as well as within the annulus between the tubing string and well bore above and below th Mar. 16, 1993
5190106 Well injection valve retrievable choke Mar. 2, 1993
5183115 Safety valve Feb. 2, 1993
5163515 Pumpdown toolstring operations in horizontal or high-deviation oil or gas wells Nov. 17, 1992
5141056 Injection valve for injecting chemicals and similar liquid substances into subsurface formations Aug. 25, 1992
5127476 Lockout housing and sleeve for safety valve Jul. 7, 1992
5125457 Resilient seal for curved flapper valve Jun. 30, 1992
4986358 Flapper mount for well safety valve Jan. 22, 1991
4962819 Mud saver valve with replaceable inner sleeve Oct. 16, 1990
4901798 Apparatus and method for removal of accumulated liquids in hydrocarbon producing wells Feb. 20, 1990

1 2 3










 
 
  Recently Added Patents
Stand for food service
Support for a portable electronic device
Method and apparatus for coordinating hopping of resources in wireless communication systems
Methods and systems for creating a tail risk hedge index and trading derivative products based thereon
Time sharing type autostereoscopic display apparatus and method for driving the same
Method and apparatus for complementing an instrument panel by utilizing augmented reality
Hanger
  Randomly Featured Patents
Cricothyrotomy device
Group III nitride-based compound semiconductor device
Method and an apparatus to generate message authentication codes at a proxy server for validating a web session
Switching between location contexts
Activating agent for peroxisome proliferator activated receptor
Stove top
Osteopontin-related compositions and methods
Information management technique
Process for producing fatty acids
Ostomy prosthesis