# US 2014/0151064 A1 · Hybrid-Tieback Seal Assembly Using Method and System for Interventionless Hydraulic Setting of Equipment when Performing Subterranean Operations > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151064 A1 - Document ID: US20140151064A1 - Status: Published application - Kind: A1 - Application number: 13/706,166 - Filed: 2012-12-05 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Assignees: Dril-Quip, Inc. - Inventors: Frank D. Kalb; Andrew J. Webber; John M. Yokley; Curtis W. Payne - Web page: https://patentgrep.com/patent/US20140151064A1 ## CPC - E21B 33/13: Methods or devices for cementing, for plugging holes, crevices or the like - E21B 23/01: for anchoring the tools or the like (E21B23/02 - E21B23/06 take precedence; anchoring of drives in the borehole E21B4/18) - E21B 33/1212: {including a metal-to-metal seal element} - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract Hybrid-tieback seal assemblies, interventionless setting assemblies, and associated methods of setting downhole components of the hybrid-tieback seal assemblies using such interventionless setting assemblies are disclosed. A hybrid-tieback seal assembly comprises one or more anchoring bodies, one or more packer seal assemblies, and one or more interventionless hydraulic setting systems. A method of setting downhole equipment comprises applying a pressure to a compensating volume and providing a working volume, wherein the working volume is separated from the compensating volume by one or more hydraulic control devices. A pressure is applied to the working volume in response to the pressure applied to the compensating volume. The pressure applied to the compensating volume is then reduced and the pressure applied to the working volume is captured by the hydraulic control devices. The captured pressure in the working volume is applied to set one or more of the anchoring bodies and packer seal assemblies. ## Claims ### Claim 1 A hybrid-tieback seal assembly comprising: one or more anchoring bodies; one or more packer seal assemblies; one or more interventionless hydraulic setting systems coupled to one or more of the anchoring bodies and packer seal assemblies, the one or more interventionless hydraulic setting systems comprising: a bottom sub; a hydraulic tubing extending from the bottom sub; a communication port housing coupled to the bottom sub, the communication port housing having a charge port; a compensating volume, wherein the compensating volume is positioned in an annular space between the hydraulic tubing and the communication port housing; a floating piston located at one side of the compensating volume, wherein fluid flowing through the charge port applies pressure to the floating piston; a working volume separated from the compensating volume by one or more hydraulic control devices, wherein the one or more hydraulic control devices regulate fluid flow from the compensating volume to the working volume; and a hydraulic piston coupled to the working volume, wherein the hydraulic piston is movable between a first position and a second position. ### Claim 2 (depends on 1) The assembly of claim 1, wherein at least one of the compensating volume and the working volume contains a compressible fluid. ### Claim 3 (depends on 2) The assembly of claim 2, wherein the compressible fluid is a silicone oil. ### Claim 4 (depends on 1) The assembly of claim 1, wherein the hydraulic piston is operable to set one or more of the anchoring bodies and packer seal assemblies when it moves between the first position and the second position. ### Claim 5 (depends on 1) The assembly of claim 1, wherein the one or more hydraulic control devices are selected from a group consisting of a check valve, a restrictor, and a combination thereof. ### Claim 6 (depends on 1) The assembly of claim 1, wherein the one or more packer seal assemblies comprise a packer seal and wherein the packer seal is a metal to metal packer seal. ### Claim 7 (depends on 1) The assembly of claim 1, wherein the one or more anchoring bodies are selected from a group consisting of a hold up body and a hold down body. ### Claim 8 (depends on 1) The assembly of claim 1, wherein the one or more anchoring bodies comprise a locking device and wherein the locking device is one of a lock ring, snap ring, collet, wedge or segmented slip system. ### Claim 9 A hybrid-tieback seal assembly comprising: one or more anchoring bodies; one or more packer seal assemblies; one or more interventionless hydraulic setting systems coupled to one or more of the anchoring bodies and packer seal assemblies, the one or more interventionless hydraulic setting systems comprising: a first compensating volume positioned in an annular space between a hydraulic tubing and a communication port housing; a first working volume positioned in the annular space between the hydraulic tubing and the communication port, wherein the first working volume is located adjacent the first compensating volume and separated from the first compensating volume by one or more hydraulic control devices, and wherein a change in pressure of the first compensating volume changes pressure of the first working volume; a second working volume positioned in the annular space between the hydraulic tubing and the communication port, wherein the second working volume is located between the first working volume and a second compensating volume in an annular space between the hydraulic tubing and the communication port housing, wherein the second working volume is separated from the second compensating volume by one or more hydraulic control devices, and wherein a change in pressure of the second compensating volume changes pressure of the second working volume; a pressure delivery port, wherein a shifting sleeve is operable to open and close the pressure delivery port in response to a pressure differential between the first working volume and the second working volume, and wherein the pressure delivery port delivers pressure to one or more of the anchoring bodies and packer seal assemblies. ### Claim 10 (depends on 9) The assembly of claim 9, wherein the second working volume is smaller than the first working volume. ### Claim 11 (depends on 9) The assembly of claim 9, wherein the first working volume and the second working volume are equal, and wherein the second working volume bleeds faster than the first working volume. ### Claim 12 (depends on 9) The assembly of claim 9, wherein at least one of the first compensating volume, the second compensating volume, the first working volume, and the second working volume contains a compressible fluid. ### Claim 13 (depends on 9) The assembly of claim 9, wherein the compressible fluid is a silicone oil. ### Claim 14 (depends on 9) The assembly of claim 9, wherein a first charge port is operable to deliver pressure to the first compensating volume using a first floating piston and a second charge port is operable to deliver pressure to the second compensating volume using a second floating piston. ### Claim 15 (depends on 9) The assembly of claim 9, wherein the shifting sleeve is coupled to a spring, wherein the spring moves the shifting sleeve to close the pressure delivery port if the pressure differential between the first working volume and the second working volume is below a threshold value. ### Claim 16 (depends on 9) The assembly of claim 9, wherein the pressure delivery port delivers pressure to one or more of the anchoring bodies and packer seal assemblies using a hydraulic piston. ### Claim 17 (depends on 9) The assembly of claim 9, wherein the one or more hydraulic control devices are selected from a group consisting of a check valve, a restrictor, and a combination thereof. ### Claim 18 (depends on 9) The assembly of claim 9, wherein the one or more packer seal assemblies comprise a packer seal and wherein the packer seal is a metal to metal packer seal. ### Claim 19 (depends on 9) The assembly of claim 9, wherein the one or more anchoring bodies are selected from a group consisting of a hold up body and a hold down body. ### Claim 20 (depends on 9) The assembly of claim 9, wherein the one or more anchoring bodies comprise a locking device and wherein the locking device is one of a lock ring, snap ring, collet, wedge or segmented slip system. ### Claim 21 A method to tie a well back to the surface comprising: running a hybrid-tieback seal assembly into a wellbore, the hybrid-tieback seal assembly comprising one or more anchoring bodies and one or more packer seal assemblies; landing a wellhead hanger in a wellhead; setting the anchoring bodies within a host casing; and setting the one or more packer seal assemblies within at least one of a receptacle of a previously installed liner hanger system and a host casing above a previously installed hanger system. ### Claim 22 (depends on 21) The method of claim 21, further comprising pressurizing the hybrid-tieback seal assembly to fully set the packer seal. ### Claim 23 (depends on 21) The method of claim 21, wherein landing the wellhead hanger further comprises locating the hybrid-tieback seal assembly within at least one of the liner hanger system and the host casing. ### Claim 24 (depends on 21) The method of claim 21, wherein landing the wellhead hanger is accomplished regardless of the position of the hybrid-tieback seal assembly within at least one of the liner hanger system and the host casing. ### Claim 25 (depends on 21) The method of claim 21, wherein setting any one of the anchoring bodies and packer seal assemblies further comprises the steps of: applying a pressure to a compensating volume, providing a working volume, wherein the working volume is separated from the compensating volume by one or more hydraulic control devices; applying a pressure to the working volume in response to the pressure applied to the compensating volume; reducing the pressure applied to the compensating volume, capturing the pressure applied to the working volume; wherein capturing the pressure applied to the working volume comprises maintaining the pressure applied to the working volume when the pressure applied to the compensating volume is reduced; and applying the captured pressure in the working volume to set one or more of the anchoring bodies and packer seal assemblies. ### Claim 26 (depends on 25) The method of claim 25, further comprising regulating fluid flow between the compensating volume and the working volume using the one or more hydraulic control devices. ### Claim 27 (depends on 25) The method of claim 25, wherein applying a pressure to the compensating volume comprises flowing a fluid through a charge port, wherein the fluid applies a pressure to a floating piston and the floating piston applies pressure to the compensating volume. ### Claim 28 (depends on 25) The method of claim 25, wherein applying the captured pressure in the working volume to set one or more of the anchoring bodies and packer seal assemblies comprises applying the captured pressure to a hydraulic piston. ### Claim 29 (depends on 25) The method of claim 25, wherein at least one of the compensating volume and the working volume is positioned in an annular space between a hydraulic tubing and a communication port housing.