# US 2024/0200631 A1 · Device to reduce subsea blowout preventer vibrations

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- Number: US 2024/0200631 A1
- Document ID: US20240200631A1
- Status: Published application
- Kind: A1
- Application number: 18/066,764
- Filed: 2022-12-15
- Published: 2024-06-20
- Earliest claimed: 2022-12-15
- Applicants: Chevron U.S.A. Inc.
- Inventors: Wangming Lu; David Crenshaw Barrow
- Web page: https://patentgrep.com/patent/US20240200631A1

## CPC

- F16F 7/104: the inertia member being resiliently mounted {(F16F7/1022 takes precedence)}
- F16F 7/1034: {of movement of a liquid}
- F16F 2222/08: Inertia
- F16F 2232/08: Linear
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION

## Abstract

The present embodiments disclose a device for dampening the lateral vibrations on a blowout preventer (BOP). The device is a cylinder with a support bar and a mass contained within. The mass can move along the support bar and press against springs, thus dampening the vibrations made against a BOP and wellhead.

## Claims

### Claim 1

A device for dampening the vibrations on a blowout preventer attached to a wellhead, the device comprising:
a cylinder body comprising two ends;
a support bar, wherein the support bar is inside the cylinder and extends laterally to the two ends; and
a mass, wherein the mass is configured to move across the support bar, wherein the mass is attached to a pair of springs such that each spring extends from the end of the cylinder body to the mass.

### Claim 2 (depends on 1)

The device of claim 1, wherein the cylinder is a closed cylinder further containing viscous fluid.