US 10,246,971 B2 · Flow activated valve

Abstract

A valve assembly for a plug to close off a zone in the well for further treatment above the plug features a valve member initially pinned in an open position where flow up to a predetermined level can move through without dislodging the valve plug to move to its associated seat. If the perforating gun misfires a replacement gun can be run in with flow as the plug is still retained in the position for flow through the plug. On the other hand flow around the plug above a predetermined level will shear retainers for the plug and let the plug land on its seat closing flow in a downhole direction for treatment.

Claims19

Dependent claims

A valve for borehole use for selectively allowing flow in a predetermined direction and selectively closing off said flow, comprising:

a housing having a passage therethrough and a seat surrounding said passage in said housing;
a valve member at a spaced location from said seat selectively retained in a first position in said passage to permit a first predetermined passage flow to bypass said valve member and continue through said passage in the predetermined direction, said valve member selectively released from within said passage, using a second predetermined passage flow higher than said first predetermined passage flow bypassing said valve member, to contact said seat to close off flow in the predetermined direction where said valve member meets said seat and not reopen to flow in the predetermined direction.

Dependencies are inferred from the claim text.

Facts

Application

14/996,956Filed 15 Jan 2016 · us provisional application

Priority

24 Sep 2015

Published

US 2017/0089175 A130 Mar 2017

Granted

2 Apr 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

E21B 34/10
In wells: operated by control fluid supplied from outside the borehole
E21B 23/006
Indexing systems for guiding relative movement between telescoping parts of downhole tools: "J-slot" systems, i.e. lug and slot indexing mechanisms
E21B 34/102
Operated by control fluid supplied from outside the borehole: with means for locking the closing element in open or closed position
E21B 34/103
With means for locking the closing element in open or closed position: with a shear pin

Flow activated valve

Life of this patent

Flow activated valve

Life of this patent

Abstract

Claims19