# US 2024/0200416 A1 · Annular pressure activated downhole tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0200416 A1 - Document ID: US20240200416A1 - Status: Published application - Kind: A1 - Application number: 18/592,880 - Filed: 2024-03-01 - Published: 2024-06-20 - Earliest claimed: 2022-02-03 - Assignees: Baker Hughes Oilfield Operations LLC - Applicants: Baker Hughes Oilfield Operations LLC - Inventors: Gregory L. Hern; Tuan Nguyen; Philip M. Gregurek - Web page: https://patentgrep.com/patent/US20240200416A1 ## CPC - E21B 23/042: {using a single piston or multiple mechanically interconnected pistons} - E21B 7/061: {the tool shaft advancing relative to a guide, e.g. a curved tube or a whipstock} - E21B 23/04: operated by fluid means, e.g. actuated by explosion (E21B23/08 takes precedence) - E21B 23/0411: {specially adapted for anchoring tools or the like to the borehole wall or to well tube} - E21B 23/04115: {using radial pistons} - E21B 23/06: for setting packers - E21B 29/06: Cutting windows, e.g. directional window cutters for whipstock operations ({E21B29/005 and} E21B29/08 take precedence) - E21B 33/129: with mechanical slips for hooking into the casing (E21B33/122, E21B33/124 take precedence) - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract An annular pressure activated downhole tool has a housing including an outer surface, an inner surface defining a passage, an annular projection projecting into the passage from the inner surface, and an opening. A mandrel extends into the passage. The mandrel has a first end and a second end. A power spring support is detachably connected to the second end of the mandrel in the passage. A power spring is arranged about the mandrel and extends between the power spring support and the annular projection. A trigger housing is arranged in the power spring support. A trigger arranged in the trigger housing selectively engages with the inner surface. The trigger is operable to disengage from the inner surface of the housing, releasing the power spring, and shifting the mandrel along the passage when exposed to a selected annular pressure. ## Claims ### Claim 1 An annular pressure activated downhole tool comprising: a housing including an outer surface, an inner surface defining a passage, an annular projection projecting into the passage from the inner surface, and an opening exposing the passage to annular pressure; a mandrel extending into the passage, the mandrel having a first end and a second end; a power spring support detachably connected to the second end of the mandrel in the passage; a power spring arranged about the mandrel and extending between the power spring support and the annular projection; a trigger housing arranged in the power spring support, the trigger housing being selectively aligned with the opening in the housing exposing the passage to annular pressure; and a trigger arranged in the trigger housing selectively engaged with the inner surface, the trigger being operable to disengage from the inner surface of the housing, releasing the power spring, and shifting the mandrel along the passage when exposed to a selected annular pressure. ### Claim 2 (depends on 1) The annular pressure activated tool according to claim 1, further comprising: a tool support including an outer surface portion, an inner surface portion defining a passage portion, a first end portion, and a second end portion, the second end portion extending into the passage and about the mandrel. ### Claim 3 (depends on 2) The annular pressure activated tool according to claim 2, further comprising: one of a slip and an expandable packer mounted to the outer surface portion. ### Claim 4 (depends on 2) The annular pressure activated tool according to claim 2, further comprising: a tubular extending through the passage portion, the tubular including a first end section and a second end section connected to the mandrel. ### Claim 5 (depends on 4) The annular pressure activated tool according to claim 4, wherein the first end section of the tubular is mechanically connected with the first end portion of the tool support. ### Claim 6 (depends on 5) The annular pressure activated tool according to claim 5, further comprising: a frangible connector mechanically connecting the tubular and the first end portion of the tool support. ### Claim 7 (depends on 1) The annular pressure activated downhole tool according to claim 1, wherein the trigger comprises a piston arranged in the trigger housing. ### Claim 8 (depends on 7) The annular pressure activated downhole tool according to claim 7, further comprising: a shear element affixing the piston in the trigger housing. ### Claim 9 (depends on 8) The annular pressure activated downhole tool according to claim 8, further comprising: a cap provided in the trigger housing about the piston, the cap including a passage selectively fluidically connecting the trigger and the wellbore annulus. ### Claim 10 (depends on 1) The annular pressure activated downhole tool according to claim 1, wherein the trigger housing is formed in the mandrel. ### Claim 11 A resource exploration and recovery system comprising: a surface system; a subsurface system including a tubular string, the tubular string including a casing exit system and an annular pressure activated tool arranged downhole of the casing exist system, the annular pressure activated tool comprising: a housing including an outer surface, an inner surface defining a passage, an annular projection projecting into the passage from the inner surface, and an opening exposing the passage to annular pressure; a mandrel extending into the passage, the mandrel having a first end and a second end; a power spring support detachably connected to the second end of the mandrel in the passage; a power spring arranged about the mandrel and extending between the power spring support and the annular projection; a trigger housing arranged in the power spring support, the trigger housing being selectively aligned with the opening in the housing exposing the passage to annular pressure; and a trigger arranged in the trigger housing selectively engaged with the inner surface, the trigger being operable to disengage from the inner surface of the housing, releasing the power spring, and shifting the mandrel along the passage when exposed to a selected annular pressure. ### Claim 12 (depends on 11) The resource exploration and recovery system according to claim 11, further comprising: a tool support including an outer surface portion, an inner surface portion defining a passage portion, a first end portion, and a second end portion, the second end portion extending into the passage and about the mandrel. ### Claim 13 (depends on 12) The resource exploration and recovery system according to claim 12, further comprising: one of a slip and an expandable packer mounted to the outer surface portion. ### Claim 14 (depends on 12) The resource exploration and recovery system according to claim 12, further comprising: a tubular extending through the passage portion, the tubular including a first end section and a second end section connected to the mandrel. ### Claim 15 (depends on 14) The resource exploration and recovery system according to claim 14, wherein the first end section of the tubular is mechanically connected with the first end portion of the tool support. ### Claim 16 (depends on 15) The resource exploration and recovery system according to claim 15, further comprising: a frangible connector mechanically connecting the tubular and the first end portion of the tool support. ### Claim 17 (depends on 11) The resource exploration and recovery system according to claim 11, wherein the trigger comprises a piston arranged in the trigger housing. ### Claim 18 (depends on 17) The resource exploration and recovery system according to claim 17, further comprising: a shear element affixing the piston in the trigger housing. ### Claim 19 (depends on 18) The resource exploration and recovery system according to claim 18, further comprising: a cap provided in the trigger housing about the piston, the cap including a passage selectively fluidically connecting the trigger and the wellbore annulus. ### Claim 20 (depends on 11) The resource exploration and recovery system according to claim 11, wherein the trigger housing is formed in the mandrel. ### Claim 21 A method of activating a downhole tool comprising: introducing a tubular string supporting the downhole tool into a wellbore formed in a formation; adjusting pressure in an annulus defined about the downhole tool in the wellbore; activating a trigger at the downhole tool with the pressure in the annulus; releasing a spring upon activating the trigger; and applying a force to a mandrel in the tubular string to activate the downhole tool. ### Claim 22 (depends on 21) The method of claim 21, wherein applying the force to the mandrel includes forcing slips into contact with a wellbore surface to anchor the downhole tool. ### Claim 23 (depends on 22) The method of claim 22, wherein applying pressure to the mandrel includes expanding a packer into contact with the wellbore surface. ### Claim 24 (depends on 21) The method of claim 21, wherein introducing the tubular string into the wellbore includes positioning a casing exit system in the wellbore. ### Claim 25 (depends on 24) The method of claim 24, wherein activating the downhole tool includes setting an anchor positioned downhole of the casing exit system. ### Claim 26 (depends on 25) The method of claim 25, further comprising: milling a casing exit after setting the anchor. ### Claim 27 (depends on 26) The method of claim 26, further comprising: drilling into the formation through the casing exit forming a lateral wellbore. ### Claim 28 (depends on 27) The method of claim 27, further comprising: producing hydrocarbons through the wellbore and the lateral wellbore.