Device for marine seismic explorations
AssigneeSercel
InventorStephen Chelminski
Life of this patent
Estimating the term…
Abstract
A seismic source for generating seismic waves under water includes an operating head having an operating chamber, a cushion chamber, and discharge ports, a firing chamber attached to the operating head, the firing chamber configured to hold compressed air to be discharged through the discharge ports, and a shuttle assembly having a shaft located within the operating head and configured to prevent the compressed air in the firing chamber to enter the discharge ports when in a close state, and to allow the compressed air in the firing chamber to be discharged through the discharge ports when in an open state. The shaft of the shuttle assembly which extends in both the operating chamber and the cushion chamber, has a channel having a varying depth.
Claims20
A seismic source for generating seismic waves under water, the seismic source comprising:
- an operating head having an operating chamber, a cushion chamber, and plural discharge ports;
- a firing chamber attached to the operating head, the firing chamber configured to hold compressed air to be discharged through the plural discharge ports;
- and
- a shuttle assembly having a shaft located within the operating head and the shuttle assembly is configured to prevent the compressed air in the firing chamber to enter the plural discharge ports when in a close state, and to allow the compressed air in the firing chamber to be discharged through the plural discharge ports when in an open state,
- wherein the shaft extends in both the operating chamber and the cushion chamber, the shaft has an external surface, and the shaft has a channel having a varying depth, and the channel is formed in the external surface so that air passes from the operating chamber to the cushion chamber, when in the open state, through the channel.
A seismic source for generating seismic waves under water, the seismic source comprising:
- an operating head having discharge ports;
- a firing chamber attached to the operating head, the firing chamber configured to hold compressed air to be discharged through the discharge ports;
- and
- a shuttle assembly having a shaft located within the operating head and configured to prevent the compressed air in the firing chamber to enter the discharge ports when in a close state, and to allow the compressed air in the firing chamber to be discharged through the discharge ports when in an open state,
- wherein the shaft of the shuttle assembly has an external surface, the shaft has a longitudinal channel having a varying depth, and the longitudinal channel is formed in the external surface so that air passes from the operating chamber to the cushion chamber, when in the open state, through the channel.
A seismic source for generating seismic waves under water, the seismic source comprising:
- an operating head having discharge ports;
- a firing chamber attached to the operating head, the firing chamber configured to hold compressed air to be discharged through the discharge ports;
- and
- a shaft located within the operating head and configured to move between a close state, in which the compressed air in the firing chamber is preventing from reaching the discharge ports, and an open state, in which the compressed air in the firing chamber is discharged through the discharge ports,
- wherein the shaft has an external surface and a longitudinal channel having a varying depth, and the longitudinal channel is formed in the external surface so that air passes from the operating chamber to the cushion chamber, when in the open state, through the longitudinal channel.
Dependencies are inferred from the claim text.