# US 11,111,762 B2 · Method and device for multilateral sealed junctions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,111,762 B2 - Document ID: US11111762B2 - Status: Granted - Kind: B2 - Application number: 16/482,766 - Filed: 2017-04-29 - Published: 2020-06-18 - Granted: 2021-09-07 - Earliest claimed: 2017-04-29 - Assignees: Halliburton Energy Services, Inc. - Applicants: Halliburton Energy Services, Inc. - Inventors: John Hudson Hales; Brett Wade Williams; Joseph George Blakey; Peter C. Jackson - Web page: https://patentgrep.com/patent/US11111762B2 ## CPC - E21B 41/0042: {characterised by sealing the junction between a lateral and a main bore} - E21B 43/14: Obtaining from a multiple-zone well - E21B 7/061: {the tool shaft advancing relative to a guide, e.g. a curved tube or a whipstock} - E21B 23/06: for setting packers - E21B 33/1208: {characterised by the construction of the sealing or packing means (E21B33/1277 takes precedence)} - E21B 33/134: Bridging plugs - E21B 43/10: Setting of casings, screens, liners {or the like} in wells - E21B 2200/08: Down-hole devices using materials which decompose under well-bore conditions - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract This disclosure provides a dissolvable sealing joint system that can be used in an improved method of sealing a multi-lateral well junction. The sealing joint system is comprised of a dissolvable junction subassembly that can be easily removed after a sealing operation is conducted. A tapered end of the dissolvable junction subassembly is inserted in a liner of a secondary wellbore, and a seal located about the tapered end is sealed against the top of the liner and a no-go shoulder of dissolvable junction subassembly. Once a seal is established, an isolation fluid is pumped into the junction area via a fluid port located in the dissolvable junction subassembly. A method of isolating a wellbore junction is also presented. ## Claims ### Claim 1 A sealing joint system for a wellbore junction, comprising: a rigid junction subassembly having upper and lower tubular portions forming a body and a fluid port located therein, the lower tubular portion having a no-go shoulder defining a tapered end; and a sealing member located about the tapered end and adjacent the no-go shoulder, and wherein at least a portion of the body is comprised of a dissolvable material. ### Claim 2 (depends on 1) The sealing joint system of claim 1, wherein the fluid port is a fixed, open port. ### Claim 3 (depends on 1) The sealing joint system of claim 1, wherein the junction subassembly is comprised of connectable sections, and the upper tubular portion is connected to at least one or more sections that form the lower tubular portion of the junction subassembly. ### Claim 4 (depends on 3) The sealing joint system of claim 3, wherein the at least one or more sections are hollow. ### Claim 5 (depends on 1) The sealing joint system of claim 1, wherein the body is a unitary, integrally formed body. ### Claim 6 (depends on 1) The sealing joint system of claim 1, wherein the junction subassembly is comprised of a metal, a metal alloy, an elastomeric material or a rubber material. ### Claim 7 (depends on 6) The sealing joint system of claim 6, wherein the metal comprises aluminum or magnesium. ### Claim 8 (depends on 6) The sealing joint system of claim 6, wherein the metal alloy is calcium-magnesium (Ca—Mg) alloys, calcium-aluminum (Ca—Al) alloys, calcium-zinc (Ca—Zn) alloys, magnesium-lithium (Mg—Li) alloys, aluminum-gallium (Al—Ga) alloys, aluminum-indium (Al—In) alloys, aluminum-gallium-indium alloys (Al—Ga—In), or combinations thereof. ### Claim 9 (depends on 1) The sealing joint system of claim 1, wherein the junction subassembly is comprised of an organic polymer. ### Claim 10 (depends on 9) The sealing joint system of claim 9, wherein the organic polymer is a polymeric composition. ### Claim 11 (depends on 10) The sealing joint system of claim 10, wherein the polymeric composition is a cross-linked polymer, thermoplastic or elastomer. ### Claim 12 (depends on 1) The sealing joint system of claim 1, wherein the junction subassembly is comprised of epoxy or a nano-structured material. ### Claim 13 (depends on 1) The sealing joint system of claim 1, wherein the lower tubular portion includes angled sections. ### Claim 14 (depends on 1) The sealing joint system of claim 1, wherein the junction subassembly is coupled to a drillable packer or drillable cement plug. ### Claim 15 A method of sealing a junction between adjacent wellbores, comprising: placing a whip stock in a parent wellbore; and using the whip stock to place a dissolvable sealing joint into a liner in a secondary wellbore, the dissolvable sealing joint being connected to a packer assembly and comprising: a junction subassembly having upper and lower portions and a fluid port located therein, the lower portion having a no-go shoulder defining a tapered end; and a sealing member located about the tapered end and adjacent the no-go shoulder, and wherein the junction subassembly is comprised of a dissolvable material; pumping an isolation fluid through the fluid port to seal a junction region located adjacent the parent and secondary wellbores; removing the packer assembly and at least partially dissolving the junction subassembly; and removing the whip stock. ### Claim 16 (depends on 15) The method of claim 15, wherein at least partially dissolving includes chemical dissolution of the junction subassembly or mechanical disintegration of the junction subassembly. ### Claim 17 (depends on 16) The method of claim 16, wherein at least partially dissolving comprises exposing the junction subassembly to a catalyst solution that reacts with the composition of the junction subassembly which dissolves the junction subassembly, wherein the catalyst solution is hydrochloric acid, nitric acids, sulfuric acid, potassium chloride, tetrahydrofuran (THF), methyl acetate (MA), isopropanol and methanol or combinations thereof. ### Claim 18 (depends on 16) The method of claim 16, wherein mechanical disintegration comprises drilling-out the junction subassembly. ### Claim 19 (depends on 15) The method of claim 15, further comprising removing the whip stock by chemical dissolution, mechanical disintegration, or physical removal of the whip stock from the parent wellbore.