ClassID:

135529

E21B34/085 - CPC Classification

Classification description:

Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained with time-delay systems, e.g. hydraulic impedance mechanisms

Recent Application in this class:
#1
20240125183
2024-04-18

Contact chamber flushing apparatus for concentric electrical wet connect

#2
20210324710
2021-10-21

Multi-piston activation mechanism

#3
20200240231
2020-07-30

Systems and methods for actuating hydraulically-actuated devices

#4
20200190942
2020-06-18

Apparatus, systems and methods for actuation of downhole tools

#5
20180347337
2018-12-06

Progressive Cavity Pump Tubing Tester

#6
20180347314
2018-12-06

Electronic time delay apparatus and method

#7
20180066493
2018-03-08

Systems and methods for actuating hydraulically-actuated devices

#8
20170306738
2017-10-26

Downhole flow control device

#9
20170058634
2017-03-02

Reverse flow arming and actuation apparatus and method

#10
20160362974
2016-12-15

Pressure test and actuation tool and method

#11
20160053579
2016-02-25

Dual stem injection valve

#12
20160053573
2016-02-25

Downhole tool consistent fluid control

#13
20150136389
2015-05-21

Plunger lift optimization

#14
20130264072
2013-10-10

Adjustable flow control device

#15
20130186626
2013-07-25

Subterranean well interventionless flow restrictor bypass system

#16
20130126184
2013-05-23

REACTIVE CHOKE FOR AUTOMATIC WELLBORE FLUID MANAGEMENT AND METHODS OF USING SAME

#17
20120205122
2012-08-16

Flow control device and methods for using same

#18
20120160520
2012-06-28

Completion assembly for stimulating, segmenting and controlling ERD wells

#19
20120152552
2012-06-21

Pressure range delimited valve with close assist

#20
20120125621
2012-05-24

Bellows valve

#21
20120061102
2012-03-15

Anhydrous boron-based timed delay plugs

#22
20090194289
2009-08-06

Water sensitive adaptive inflow control using cavitations to actuate a valve

#23
20050000693
2005-01-06

Release tool for coiled tubing