Disconnecting tool

Patent metadata

Field	Value
Publication number	US-2016265293-A1
Application number	US-201615161444-A
Country	US
Kind code	A1
Filing date	May 23, 2016
Priority date	Aug 31, 2011
Publication date	Sep 15, 2016
Grant date	—

Abstract

A downhole system includes an upper casing that is connected to a lower casing via an annular barrier that expands upon application of pressurized fluid. The lower casing may also include additional annular barriers to fasten the lower casing relative to the borehole.

First claim

1 . A downhole system for deployment in a borehole, the downhole system comprising:
an upper casing having an inside surface; and a lower casing having a first annular barrier including a first expandable metal sleeve, the first expandable metal sleeve being expandable upon the application of pressurized fluid to engage the inside surface of the upper casing, to fasten the lower casing to the upper casing.

2 . The downhole system of claim 1 , wherein the lower casing includes a second annular barrier, axially spaced from the first annular barrier, the second annular barrier having a second expandable metal sleeve expandable to be fastened to an inside surface of the borehole.

3 . The downhole system of claim 1 , wherein the inner surface of the upper casing is located proximate a downhole end of the upper casing, and the first annular barrier of the lower casing is located promate an uphole end of the lower casing.

4 . The downhole system of claim 1 , wherein the upper casing has a diameter that is larger than a diameter of the lower casing.

5 . The downhole system of claim 1 , wherein the first and second annular barriers are connected to an outer surface of the lower casing.

6 . The downhole system of claim 1 , further comprising a running tool detachably attached to an uphole end of the lower casing.

7 . The downhole system of claim 6 , wherein the lower casing has an inside surface including a cavity and the running tool includes a dog that is retractably receivable in the cavity.

8 . The downhole system of claim 6 , further comprising a disconnecting tool to detach the running tool from the lower casing.

9 . The downhole system of claim 6 , further comprising a drill pipe attachable to the running tool.

10 . A downhole system for deployment in a well bore, the downhole system comprising:
an upper casing having an inside surface; and a lower casing having a first annular barrier including a first expandable metal sleeve, the first expandable sleeve being expandable upon application of pressurized fluid to engage the inside surface of the upper casing, to fasten the lower casing to the upper casing, wherein:
the lower casing includes a second annular barrier, axially spaced downhole from the first annular barrier, the second annular barrier having a second expandable metal sleeve expandable upon application of the pressurized fluid to be fastened to an inside surface of the well bore,
the inner surface of the upper casing is located proximate a downhole end of the upper casing, and the first annular barrier of the lower casing is located promate an uphole end of the lower casing,
the upper casing has a diameter that is larger than a diameter of the lower casing, and
the first and second annular barriers are connected to an outer surface of the lower casing.

11 . The downhole system of claim 10 , further comprising a running tool detachably attached to the uphole end of the lower casing.

12 . The downhole system of claim 11 , wherein the lower casing has an inside surface including a cavity and the running tool includes a dog that is retractably receivable in the cavity.

13 . The downhole system of claim 11 , further comprising a disconnecting tool to detach the running tool from the lower casing.

14 . The downhole system of claim 11 , further comprising a drill pipe attachable to the running tool.

15 . A method for installing a downhole system in a borehole having an upper casing, the method comprising:
connecting a running tool to a lower casing having at least a first annular barrier with a first expandable metal sleeve, connecting the running tool with a drill pipe, lowering the drill pipe, running tool and the lower casing into the borehole, and upon application of pressurized fluid, expanding the first expandable metal sleeve of the first annular barrier and connecting the lower casing with the upper casing via the first expandable metal sleeve.

16 . The method of claim 15 , wherein the method further comprises disconnecting the running tool from the lower casing, and raising the running tool, the drill pipe and the disconnecting tool.

17 . The method of claim 15 , wherein the lower casing has a second annular barrier with a second expandable metal sleeve adapted to fasten the lower casing to an inside surface of the borehole, and the first and second expandable metal sleeves are expanded with the pressurized fluid at substantially the same time.

Assignees

• Welltec As

Inventors

• Hallundbæk Jørgen

Classifications

• E21B43/103

  of expandable casings, screens, liners, or the like · CPC title

• E21B23/06

  for setting packers · CPC title

• E21B43/10

  Setting of casings, screens, liners {or the like} in wells · CPC title

• E21B23/00 Primary

  Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (setting of casings, screens or liners E21B43/10) · CPC title

• E21B23/14

  for displacing a cable or a cable-operated tool, e.g. for logging or perforating operations in deviated wells · CPC title