US2019242215A1PendingUtilityA1

Wellbore treatment system

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Assignee: JOHNSON MICHAELPriority: Feb 2, 2018Filed: Feb 2, 2018Published: Aug 8, 2019
Est. expiryFeb 2, 2038(~11.6 yrs left)· nominal 20-yr term from priority
Inventors:Michael H. Johnson
E21B 2200/06E21B 2034/007E21B 34/10E21B 43/26E21B 34/142
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PatentIndex Score
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Claims

Abstract

A wellbore treatment system including a housing having a first port and a second port, a first sleeve positionable to cover and uncover the first port, a first supportable and unsupportable plug seat operably connected to the first sleeve, a second sleeve positionable to cover and uncover the second port and the first port, and a second supportable and unsupportable plug seat operably connected to the second sleeve. A method for treating a wellbore including deploying a plug to a first supportable and unsupportable plug seat operably connected to a first sleeve, actuating the first sleeve to open a first port in a housing, treating the wellbore through the first port, deploying a second plug to a second supportable and unsupportable plug seat operably connected to a second sleeve, and actuating the second sleeve to uncover a second port and cover the first port.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A wellbore treatment system comprising:
 a housing having a first port and a second port;   a first sleeve positionable to cover and uncover the first port;   a first supportable and unsupportable plug seat operably connected to the first sleeve;   a second sleeve positionable to cover and uncover the second port and the first port; and   a second supportable and unsupportable plug seat operably connected to the second sleeve.   
     
     
         2 . The system as claimed in  claim 1  wherein the first sleeve and first seat are operably connected by a first release member. 
     
     
         3 . The system as claimed in  claim 1  wherein the second sleeve and second seat are operably connected by a second release member. 
     
     
         4 . The system as claimed in  claim 3  wherein the second sleeve is operably connected to the housing by a housing release member. 
     
     
         5 . The system as claimed in  claim 4  wherein the second release member and the housing release member are one piece. 
     
     
         6 . The system as claimed in  claim 1  wherein at least one of the first and second seat is radially outwardly deformable when unsupported. 
     
     
         7 . The system as claimed in  claim 6  wherein the at least one of the first and second seat is elastic. 
     
     
         8 . The system as claimed in  claim 6  wherein the at least one of the first and second seat is segmented. 
     
     
         9 . The system as claimed in  claim 8  wherein segmented comprises collet fingers. 
     
     
         10 . The system as claimed in  claim 1  wherein the first sleeve includes a recess where support for the first seat is lacking. 
     
     
         11 . The system as claimed in  claim 1  wherein the second sleeve includes a recess where support for the second seat is lacking. 
     
     
         12 . The system as claimed in  claim 1  wherein the second sleeve includes a nose configured to cover the first port. 
     
     
         13 . The system as claimed in  claim 12  wherein the nose is configured to interact with the first release member. 
     
     
         14 . A method for treating a wellbore comprising:
 deploying a plug to a first supportable and unsupportable plug seat operably connected to a first sleeve;   actuating the first sleeve to open a first port in a housing;   treating the wellbore through the first port;   deploying a second plug to a second supportable and unsupportable plug seat operably connected to a second sleeve; and   actuating the second sleeve to uncover a second port and cover the first port.   
     
     
         15 . The method as claimed in  claim 14  wherein the actuating the second sleeve includes releasing a housing release member. 
     
     
         16 . The method as claimed in  claim 14  wherein the actuating the first sleeve includes pressuring on the first plug. 
     
     
         17 . The method as claimed in  claim 14  wherein the actuating the second sleeve includes pressuring on the second plug. 
     
     
         18 . The method as claimed in  claim 14  further comprising:
 releasing a first release member operably connecting the first seat to the first sleeve; 
 releasing a second release member operably connecting the second seat to the second sleeve; 
 moving the first and second seats to positions adjacent the first and second sleeves respectively that lack support for the first and second seats; 
 deforming the first and second seats; and 
 releasing the first and second plugs. 
 
     
     
         19 . The method as claimed in  claim 18  wherein the first and second sleeves include first and second recesses, respectively, and the moving of the first and second seats is to positions where the first and second seats are deformable into the first and second recesses, respectively. 
     
     
         20 . The method as claimed in  claim 14  wherein the actuating the second sleeve to uncover a second port and cover the first port further includes releasing the first release member with the second sleeve.

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