Blowout preventer with lock
OwnerDean Footeinventor
Life of this patent
Estimating the term…
Abstract
A lock for a ram shaft of a blowout preventer has a ram shaft controlled by an actuator, the ram shaft having a ram block end and a locking end, the locking end having an internal cavity that extends along an axis of the ram shaft, and a locking pin in the internal cavity. The locking pin has a release position retracted into the internal cavity, and a locking position extending from the internal cavity. A rotational stop engages the ram shaft and prevents the ram shaft from rotating. A locking pin stop is secured relative to the actuator, the locking pin stop engaging the locking pin in the locking position to prevent axial movement of the ram shaft.
Claims9
A lock for a ram shaft of a blowout preventer, comprising:
- a ram shaft controlled by an actuator, the ram shaft having a ram block end and a locking end, the locking end having an internal cavity that extends along an axis of the ram shaft;
- a locking pin in the internal cavity, the locking pin having a release position retracted into the internal cavity, and a locking position extending from the internal cavity;
- a rotational stop engaging the ram shaft and prevents the ram shaft from rotating;
- and
- a locking pin stop secured relative to the actuator, the locking pin stop engaging the locking pin in the locking position to prevent axial movement of the ram shaft.
A blowout preventer, comprising:
- a body having opposed ram shaft openings;
- a ram shaft in an actuator, the ram shaft having a ram block end and a locking end, the locking end having an internal cavity that extends along an axis of the ram shaft;
- a locking pin in the internal cavity, the locking pin having a release position retracted within the internal threaded cavity, and a locking position extending from the internal threaded cavity;
- a rotational stop that engages the ram shaft and prevents the ram shaft from rotating;
- and
- a locking pin stop secured relative to the body, the locking pin stop engaging the locking pin in the locking position to prevent axial movement of the ram shaft.
A method of locking a blowout preventer, comprising the steps of:
- providing a blowout preventer, comprising:
- a body having opposed ram shaft openings;
- a ram shaft in an actuator, the ram shaft having a ram block end and a locking end, the locking end having an internal cavity that extends along an axis of the ram shaft;
- a locking pin in the internal cavity, the locking pin having a release position retracted within the internal threaded cavity, and a locking position extending from the internal threaded cavity;
- a rotational stop that engages the ram shaft and prevents the ram shaft from rotating;
- and
- a locking pin stop secured relative to the body, the locking pin stop engaging the locking pin in the locking position to prevent axial movement of the ram shaft;
- actuating the ram shaft into the body to a closed position;
- and
- moving the locking pin to the locking position to engage the locking pin stop.
Dependencies are inferred from the claim text.