Granted Patent B1

US 12,247,456 · App. 18/455,153 · Granted Mar 11, 2025

Inventor: Miguel Urrutia (Rosharon, TX)

Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION

E21B33/063

Abstract

Claims (35)

1. A system for use with a blowout preventer (BOP) assembly, comprising:

a BOP shear ram assembly having a ram for shearing a tubular member, the ram comprising:

a main body;

a blade extending from the main body, the blade comprising a shearing edge; and

a ramp buttress secured to the blade to strengthen the blade, the ramp buttress having an angled ramp established by a thickness of the ramp buttress increasing from a thinner end to a thicker end in a direction moving away from the shearing edge toward the main body,

wherein the angled ramp is formed with a plurality of different angles.

2. The system as recited in claim 1 , wherein the BOP shear ram assembly comprises a corresponding ram positioned to cooperate with the ram when shearing the tubular member.

3. The system as recited in claim 2 , wherein the ram is connected to a piston slidably mounted in a cylinder such that movement of the piston causes movement of the ram and wherein the corresponding ram is connected to a corresponding piston slidably mounted in a corresponding cylinder such that movement of the corresponding piston causes movement of the corresponding ram, the piston and the corresponding piston being actuatable to move the ram and the corresponding ram toward each other during shearing of the tubular member.

4. The system as recited in claim 1 , wherein the ram is connected to a piston slidably mounted in a cylinder such that movement of the piston causes corresponding movement of the ram.

5. The system as recited in claim 1 , wherein the ramp buttress also is secured to the main body.

6. The system as recited in claim 5 , wherein the ramp buttress is secured by integrally forming the ramp buttress with the blade and the main body.

7. The system as recited in claim 1 , wherein the ramp buttress is positioned to lift the tubular member away from the shearing edge during a shearing operation.

8. A system for use with a blowout preventer (BOP) assembly, comprising:

a BOP shear ram assembly having a ram for shearing a tubular member, the ram comprising:

a main body;

a blade extending from the main body, the blade comprising a shearing edge; and

a ramp buttress secured to the blade to strengthen the blade, the ramp buttress having an angled ramp established by a thickness of the ramp buttress increasing from a thinner end to a thicker end in a direction moving away from the shearing edge toward the main body,

wherein the ramp buttress comprises a plurality of angled ramps.

9. A system, comprising:

a BOP stack having a BOP shear ram assembly constructed with opposing rams oriented to shear a tubular member, at least one of the opposing rams comprising:

a main body;

a blade extending from the main body, the blade comprising a shearing edge; and

a ramp buttress secured to the blade to strengthen the blade, the ramp buttress having a ramp established by a thickness of the ramp buttress increasing from a thinner end to a thicker end in a direction moving away from the shearing edge toward the main body,

wherein the ramp is formed with a plurality of differently angled surfaces.

10. The system as recited in claim 9 , wherein the ramp is formed with a flat surface.

11. The system as recited in claim 9 , wherein the ramp buttress also is secured to the main body.

12. The system as recited in claim 11 , wherein the ramp buttress is secured by integrally forming the ramp buttress with the blade and the main body.

13. The system as recited in claim 9 , wherein the ramp buttress is positioned to lift the tubular member away from the shearing edge during a shearing operation.

14. The system as recited in claim 13 , wherein the at least one opposing ram comprises a seal positioned along the blade, the ramp buttress being located to lift the tubular member away from the seal before the entire tubular member crosses the seal during the shearing operation.

15. A method, comprising:

providing a BOP shear ram assembly with a ram having a main body and a blade extending from the main body;

securing a ramp buttress to the blade to strengthen the blade; and

locating a ramp on the ramp buttress so as to lift a tubular member away from a shear region during shearing of the tubular member,

wherein the ramp comprises a non-linear incline.

16. The method as recited in claim 15 , further comprising assembling the BOP shear ram assembly into a BOP stack; mounting the BOP stack above a wellhead; and utilizing the BOP stack in a drilling operation.

Assignments (1)

References Cited (106)