# US 2023/0057040 A1 · Dual position isolator seal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0057040 A1 - Document ID: US20230057040A1 - Status: Published application - Kind: A1 - Application number: 17/404,775 - Filed: 2021-08-17 - Published: 2023-02-23 - Earliest claimed: 2021-08-17 - Assignees: Weatherford Technology Holdings, LLC - Applicants: Weatherford Technology Holdings, LLC - Inventors: Jeffrey D. HERNDON - Web page: https://patentgrep.com/patent/US20230057040A1 ## CPC - E21B 23/06: for setting packers - E21B 33/14: for cementing casings into boreholes - E21B 21/10: Valve arrangements in drilling-fluid circulation systems - E21B 23/00: 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) - E21B 43/10: Setting of casings, screens, liners {or the like} in wells - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract A wellbore isolation assembly includes an outer component and an inner component. The outer component is disposed at a first location in a wellbore. The inner component is disposed at a second location in the wellbore. The inner component is moved from the second location into engagement with the outer component at the first location to form a barrier within the wellbore. When deployed in the wellbore, the barrier inhibits passage of fluids. The wellbore isolation assembly is then retrieved from the wellbore. ## Claims ### Claim 1 A wellbore isolation assembly comprising: an outer component including: a mandrel; a seal bore within the mandrel; and a locking dog movable between radially extended and radially retracted positions; an inner component configured to mate with the outer component, the inner component including: a body; and a first seal element on the body configured to engage the seal bore; and a first fastener configured to secure the inner component to the outer component. ### Claim 2 (depends on 1) The wellbore isolation assembly of claim 1, wherein the locking dog protrudes through an aperture in the mandrel when in the radially extended position. ### Claim 3 (depends on 2) The wellbore isolation assembly of claim 2, wherein: the locking dog includes a first slope; and the outer component further comprises a sleeve disposed within the mandrel, the sleeve including a second slope in engagement with the first slope. ### Claim 4 (depends on 3) The wellbore isolation assembly of claim 3, wherein the outer component further comprises a second fastener coupling the sleeve to the mandrel. ### Claim 5 (depends on 4) The wellbore isolation assembly of claim 4, wherein the sleeve further comprises a retrieval profile. ### Claim 6 (depends on 5) The wellbore isolation assembly of claim 5, wherein the retrieval profile includes a J-slot. ### Claim 7 (depends on 3) The wellbore isolation assembly of claim 3, wherein the sleeve includes an end configured to abut an internal shoulder of the mandrel. ### Claim 8 (depends on 1) The wellbore isolation assembly of claim 1, wherein the outer component further comprises an external seal. ### Claim 9 (depends on 1) The wellbore isolation assembly of claim 1, wherein the inner component further comprises a second seal element on the body configured to engage the seal bore. ### Claim 10 (depends on 9) The wellbore isolation assembly of claim 9, wherein the inner component further comprises a circulation port through a wall of the body between the first and second seal elements. ### Claim 11 (depends on 9) The wellbore isolation assembly of claim 9, wherein the inner component further comprises a fluid dump port through the wall of the body below the first and second seal elements. ### Claim 12 (depends on 11) The wellbore isolation assembly of claim 11, wherein the inner component further comprises a sleeve covering the fluid dump port. ### Claim 13 A method comprising: disposing an outer component of a wellbore isolation assembly in a first location within a tubular; disposing an inner component of the wellbore isolation assembly in a second location within the tubular; running the tubular into a wellbore using a work string; then using the work string to move the inner component from the second location to engage with the outer component at the first location; and decoupling the work string from the inner component. ### Claim 14 (depends on 13) The method of claim 13, wherein the outer component includes an external seal in contact with the tubular. ### Claim 15 (depends on 14) The method of claim 14, wherein the inner component includes a sealing element in contact with the outer component when the inner component is engaged with the outer component. ### Claim 16 (depends on 15) The method of claim 15, wherein when the inner component is engaged with the outer component, the wellbore isolation assembly inhibits fluid flow through the tubular. ### Claim 17 (depends on 13) The method of claim 13, further comprising performing a gravel pack operation after running the tubular into the wellbore and before moving the inner component into engagement with the outer component. ### Claim 18 (depends on 13) The method of claim 13, further comprising placing a cement slurry around the tubular after running the tubular into the wellbore and before moving the inner component into engagement with the outer component. ### Claim 19 (depends on 13) The method of claim 13, further comprising removing the work string from the wellbore. ### Claim 20 (depends on 13) The method of claim 13, further comprising: engaging the outer component with a retrieval tool; manipulating the retrieval tool to decouple the outer component from the tubular; and retrieving the inner and outer components together from the wellbore.