US 9,359,877 B2Granted

Method and apparatus for single-trip time progressive wellbore treatment

AssigneeCompletion Tool Developments, Inc.

InventorGregg W. Stout

Life of this patent

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Abstract

A single trip multizone time progressive well treating method and apparatus that provides a means to progressively stimulate individual zones through a cased or open hole well bore. The operator can use pre-set timing devices to progressively treat each zone up the hole. At each zone the system automatically opens a sliding sleeve and closes a frangible flapper, at a preselected point in time. An adjustable preset timing device is installed in each zone to allow preplanned continual frac operations for all zones. An optional “Stand-Down-Mode” can be integrated into the timing system so that if pumping stops the timers go into a sleep mode until the pumping resumes. The apparatus can consist of three major components: a packer, a timing pressure device, and a sliding sleeve/isolation device. The packer may be removed.

Claims7

Dependent claims

A single trip well stimulation tool comprising:

a plurality of valve mechanisms,
a plurality of tubulars connected between the valve mechanisms,
a plurality of time variable actuators each including an adjustable timer mechanism, and
means for deactivating the adjustable timer mechanism once the timer mechanism has been initially activated;
and means for retaining the time that the timer mechanisms have been activated so that upon reactivation the timers will all resume at the point where they were deactivated, wherein the time variable valve actuators include a first piston having a surface exposed to pressure within the tubulars, an orifice piston having a flow control device therein, a chamber filled with fluid, a pressure release rod, a second chamber charged with a pressurized gas, a second piston movable within a third chamber movable by the pressurized gas in the second chamber and a sleeve connected to the second piston.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/358,265Filed 25 Jan 2012 · continuation in part
Priority: 1 Nov 2010
Published: US 2012/0103628 A17 Jun 2012
Granted: 7 Jun 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

E21B 34/14
In wells: operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
E21B 34/10
In wells: operated by control fluid supplied from outside the borehole
E21B 43/14
Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells: obtaining from a…
E21B 43/26
Methods for stimulating production: by forming crevices or fractures

Family

Application61/408,780Us provisional application · filed 1 Nov 2010
Application13/285,109Parent of this continuation-in-part · filed 31 Oct 2011
US 2012/0138311 A1Pre-grant publication · published 7 Jun 2012
US 8,794,330 B2Parent of this continuation-in-part
US 2012/0103628 A1Published application
US 9,359,877 B2This patent

From the US filing history. Foreign family members aren’t listed.

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