Blowout preventer with multiple application ram blades
AssigneeSchlumberger Technology Corporation
InventorMicah Threadgill
Life of this patent
Estimating the term…
Abstract
A blowout preventer for shearing structures positioned in a bore extending through the blowout preventer, the blowout preventer body having a bore and guideways, first and second rams movably positioned relative the guideways and movable toward the bore, a blade of the first ram having a flat side, a blunt leading contour, an upper inclined surface above the blunt leading contour, and a lower declined below the blunt leading contour, a blade of the second ram having a leading contour and at least one lower declined surface.
Claims20
A blowout preventer for shearing structures positioned in a bore extending through the blowout preventer, the blowout preventer comprising:
- a body having a bore, a first guideway, and a second guideway;
- a first ram movably positioned relative to the first guideway and movable toward the bore, the first ram comprising a first blade having at least one flat side, the first blade comprising:
- a blunt leading contour running parallel to a plane of the at least one flat side along a distal end of the first blade,
- at least one upper inclined surface above the blunt leading contour, and
- at least one lower declined surface below the blunt leading contour,
- wherein the first blade is positioned and is movable above a first plane;
- a second ram movably positioned relative to the second guideway and movable toward the bore, the second ram comprising a second blade, the second blade comprising:
- a leading contour, and
- at least one lower declined surface,
- wherein the second blade is positioned and is movable below the first plane,
- wherein the blunt leading contour of the first blade is disposed on and movable in a second plane, wherein the first plane, the second plane, and the plane of the at least one flat side of the first blade are parallel, and wherein the at least one lower declined surface of the first blade is between the first and second planes.
A ram blade of a blowout preventer for shearing structures positioned in a bore extending through the blowout preventer, the ram blade comprising:
- at least one flat side;
- a blunt leading contour running parallel to a plane of the at least one flat side along a distal end of the ram blade,
- at least one upper inclined surface above the blunt leading contour, wherein the at least one upper inclined surface forms an angle between about 120 and 160 degrees with the flat side, and
- at least one lower declined surface below the blunt leading contour, wherein the at least one lower declined surface forms an angle between about 60 and 100 degrees with the at least one upper inclined surface.
A blowout preventer for shearing structures positioned in a bore extending through the blowout preventer, the blowout preventer comprising:
- a body having a bore, a first guideway, and a second guideway;
- a first ram movably positioned relative to the first guideway and movable toward the bore, the first ram comprising a first blade, the first blade comprising:
- at least one flat side;
- a blunt leading contour running parallel to a plane of the flat side along a distal end of the first blade,
- at least one upper inclined surface above the blunt leading contour, wherein the at least one upper inclined surface forms an angle between about 120 and 160 degrees with the flat side, and
- at least one lower declined surface below the blunt leading contour, wherein the at least one lower declined surface forms an angle between about 60 and 100 degrees with the at least one upper inclined surface;
- a second ram movably positioned relative to the second guideway and movable toward the bore, the second ram comprising a second blade, the second blade comprising:
- at least one flat side,
- a leading contour, and
- at least one lower declined surface.
Dependencies are inferred from the claim text.