# US 11,111,751 B1 · Blowout preventer with dual function rams > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,111,751 B1 - Document ID: US11111751B1 - Status: Granted - Kind: B1 - Application number: 16/812,421 - Filed: 2020-03-09 - Published: 2021-09-09 - Granted: 2021-09-07 - Earliest claimed: 2020-03-09 - Assignees: Schlumberger Technology Corporation - Applicants: Cameron International Corporation - Inventors: Patrice Couren; Florent Vargas - Web page: https://patentgrep.com/patent/US11111751B1 ## CPC - E21B 33/063: {for shearing drill pipes (cutting of wireline E21B29/04)} - E21B 33/06: Blow-out preventers {, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers (rotating blow-out preventers E21B33/085)} - E21B 33/061: {Ram-type blow-out preventers, e.g. with pivoting rams} - E21B 33/062: {with sliding rams} - E21B 33/085: {Rotatable packing means, e.g. rotating blow-out preventers} - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract A dual function ram system for a blowout preventer (BOP) includes a first dual function ram that is configured to move within a cavity of the BOP between a withdrawn position to cause the BOP to be in an open configuration and an extended position to cause the BOP to be in a closed configuration. The first dual function ram includes a shearing surface that is configured to shear a tubular within a central bore during a shearing operation and a pipe-sealing surface that is configured to seal against the tubular within the central bore during a pipe-sealing operation. ## Claims ### Claim 1 A dual function ram system for a blowout preventer (BOP), the dual function ram system comprising: a first dual function ram configured to move within a cavity of the BOP between a withdrawn position to cause the BOP to be in an open configuration and an extended position to cause the BOP to be in a closed configuration, wherein the first dual function ram comprises a shearing surface that is configured to shear a tubular within a central bore during a shearing operation and a pipe-sealing surface that is configured to seal against the tubular within the central bore during a pipe-sealing operation. ### Claim 2 (depends on 1) The dual function ram system of claim 1, wherein the shearing surface and the pipe-sealing surface are offset from one another along a circumferential axis of the first dual function ram. ### Claim 3 (depends on 1) The dual function ram system of claim 1, wherein the first dual function ram comprises a cylindrical shape. ### Claim 4 (depends on 1) The dual function ram system of claim 1, wherein the first dual function ram comprises a curved groove, and the curved groove comprises a toothed surface that is configured to engage a corresponding toothed surface of a rotating shaft to enable rotation of the rotating shaft to drive rotation of the first dual function ram within the cavity of the BOP. ### Claim 5 (depends on 1) The dual function ram system of claim 1, comprising the cavity of the BOP, wherein the first dual function ram is configured to rotate within the cavity to a first position to enable the shearing surface to move into and out of the central bore along an axial axis. ### Claim 6 (depends on 5) The dual function ram system of claim 5, wherein the pipe-sealing surface is configured to be positioned outside of the central bore while the shearing surface is positioned within the central bore. ### Claim 7 (depends on 6) The dual function ram system of claim 6, wherein the pipe-sealing surface is configured to move with the shearing surface along the axial axis as the shearing surface moves into and out of the central bore along the axial axis. ### Claim 8 (depends on 1) The dual function ram system of claim 1, comprising a second dual function ram configured to move within the cavity of the BOP, wherein the second dual function ram comprises a respective shearing surface that is configured to shear the tubular within the central bore during the shearing operation and a respective pipe-sealing surface that is configured to seal against the tubular within the central bore during the pipe-sealing operation. ### Claim 9 (depends on 1) The dual function ram system of claim 1, comprising the cavity of the BOP, wherein the cavity comprises one or more stops configured to block entry of one of the shearing surface or the pipe-sealing surface into the central bore. ### Claim 10 A blowout preventer (BOP), comprising: a housing defining a central bore; a cavity intersecting the central bore; and a first dual function ram supported within the cavity, wherein the first dual function ram is configured to move within the cavity along an axial axis between a withdrawn position to cause the BOP to be in an open configuration and an extended position to cause the BOP to be in a closed configuration, wherein the first dual function ram is configured to rotate within the cavity along a circumferential axis between a first position that enables a first surface of the first dual function ram to enter the central bore to carry out a first operation and a second position that enables a second surface of the first dual function ram to enter the central bore to carry out a second operation. ### Claim 11 (depends on 10) The BOP of claim 10, wherein the first surface comprises a shearing surface and the second surface comprises a pipe-sealing surface. ### Claim 12 (depends on 10) The BOP of claim 10, wherein the first surface and the second surface are offset from one another along the circumferential axis of the first dual function ram. ### Claim 13 (depends on 10) The BOP of claim 10, wherein the first dual function ram comprises a cylindrical shape. ### Claim 14 (depends on 10) The BOP of claim 10, wherein the first dual function ram comprises a curved groove, and the curved groove comprises a toothed surface that is configured to engage a corresponding toothed surface of a rotating shaft to enable rotation of the rotating shaft to drive rotation of the first dual function ram within the cavity of the BOP. ### Claim 15 (depends on 10) The BOP of claim 10, wherein the first surface is configured to be positioned outside of the central bore while the second surface is positioned within the central bore, and wherein the second surface is configured to be positioned outside of the central bore while the first surface is positioned within the central bore. ### Claim 16 (depends on 10) The BOP of claim 10, wherein the first surface and the second surface are configured to move together along the axial axis. ### Claim 17 (depends on 10) The BOP of claim 10, comprising a second dual function ram configured to move within the cavity of the BOP, wherein the second dual function ram is configured to move within the cavity, wherein the second dual function ram is configured to rotate within the cavity along the circumferential axis between a respective first position that enables a respective first surface of the second dual function ram to enter the central bore to carry out the first operation and a respective second position that enables a respective second surface of the second dual function ram to enter the central bore to carry out the second operation. ### Claim 18 (depends on 10) The BOP of claim 10, wherein the cavity comprises one or more stops configured to block entry of one of the first surface or the second surface into the central bore.