ClassID:

135537

E21B34/108 - CPC Classification

Classification description:

Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole with time delay systems, e.g. hydraulic impedance mechanisms

Recent Application in this class:
#1
20250361791
2025-11-27

TIME DELAYED ACTUATION OF WELL TOOL

#2
20220356784
2022-11-10

Valve having a modular activation system

#3
20220065070
2022-03-03

Port sub with delayed opening sequence

#4
20220003069
2022-01-06

Stage cementing system

#5
20210017837
2021-01-21

Method and stimulation sleeve for well completion in a subterranean wellbore

#6
20210002981
2021-01-07

SWITCHES FOR CONTROLLING DOWNHOLE TOOLS

#7
20200141211
2020-05-07

Pressure integrity testing of one-trip completion assembly

#8
20200063538
2020-02-27

APPARATUS, SYSTEMS AND METHODS FOR ISOLATION DURING MULTISTAGE HYDRAULIC FRACTURING WITH FLOW CONTROL MEMBER HAVING IMPEDANCE FEATURE

#9
20190271215
2019-09-05

Top-down fracturing system

#10
20190153819
2019-05-23

Slow response time tool

#11
20190136666
2019-05-09

Method and stimulation sleeve for well completion in a subterranean wellbore

#12
20180334877
2018-11-22

Pressure containment device

#13
20180171753
2018-06-21

Method and apparatus for actuating downhole tools

#14
20180163508
2018-06-14

Time-delayed downhole tool

#15
20170328155
2017-11-16

Mechanical downhole pressure maintenance system

#16
20170306738
2017-10-26

Downhole flow control device

#17
20170096878
2017-04-06

Method and apparatus for smooth bore toe valve

#18
20170058642
2017-03-02

Reverse flow catch-and-engage tool and method

#19
20170058641
2017-03-02

Reverse flow multiple tool system and method

#20
20170058639
2017-03-02

Reverse flow seat forming apparatus and method

#21
20170058637
2017-03-02

Reverse flow catch-and-release tool and method

#22
20170058634
2017-03-02

Reverse flow arming and actuation apparatus and method

#23
20170030168
2017-02-02

Top-down fracturing system

#24
20170022785
2017-01-26

Safety device for a fluid production well, associated installation and method

#25
20160258252
2016-09-08

Actuation assembly using pressure delay

#26
20160237781
2016-08-18

Time delay toe sleeve

#27
20160153262
2016-06-02

Hydraulic flow restriction tube time delay system and method

#28
20160123113
2016-05-05

Flow-activated flow control device and method of using same in wellbore completion assemblies

#29
20150369040
2015-12-24

Hydraulic delay toe valve system and method

#30
20150369011
2015-12-24

Hydraulic delay toe valve system and method

#31
20150369009
2015-12-24

Hydraulic Delay Toe Valve System and Method

#32
20150369008
2015-12-24

Hydraulic delay toe valve system and method

#33
20150369007
2015-12-24

Hydraulic delay toe valve system and method

#34
20150315873
2015-11-05

Delayed opening pressure actuated ported sub for subterranean use

#35
20150292281
2015-10-15

Remote hydraulic control of downhole tools

#36
20150247379
2015-09-03

Pressure responsive downhole tool having a selectively activatable pressure relief valve and related methods

#37
20150144400
2015-05-28

Pressure containment device

#38
20140374096
2014-12-25

Method and apparatus for smooth bore toe valve

#39
20140251620
2014-09-11

Method and apparatus for establishing injection into a cased bore hole using a time delay toe injection apparatus

#40
20140251619
2014-09-11

Method and apparatus for establishing injection into a cased bore hole using a time delay toe injection apparatus

#41
20140166290
2014-06-19

Method for individually servicing a plurality of zones of a subterranean formation

#42
20140000909
2014-01-02

System and method for servicing a wellbore

#43
20130284451
2013-10-31

Delayed activation activatable stimulation assembly

#44
20130199800
2013-08-08

Wiper plug elements and methods of stimulating a wellbore environment

#45
20130105175
2013-05-02

Frangible pressure control plug, actuatable tool including the plug, and method thereof

#46
20130075099
2013-03-28

Pulse fracturing devices and methods

#47
20120205120
2012-08-16

Method for individually servicing a plurality of zones of a subterranean formation

#48
20120111574
2012-05-10

Delayed opening wellbore tubular port closure

#49
20120103628
2012-05-03

Apparatus for single-trip time progressive wellbore treatment

#50
20110253383
2011-10-20

System and method for servicing a wellbore

#51
20110073320
2011-03-31

Tubular actuator and method

#52
20100200245
2010-08-12

Hydraulic lockout device for pressure controlled well tools

#53
20090159266
2009-06-25

Actuating mechanism

#54
20070125554
2007-06-07

Actuating mechanism

#55
17948140
2023-07-18

Toe valve having integral valve body sub and sleeve

#56
14685176
2016-03-01

Hydraulic flow restriction tube time delay system and method