Streamer handling apparatus for use on seismic survey vessels
AssigneeSchlumberger Technology Corporation
InventorsBaard Johnsen, Carel Willem Jan Hooykaas
Life of this patent
Estimating the term…
Abstract
Streamer handling apparatus for use on a seismic survey vessel (10) comprises one or more trolleys (40) movable along a guide rail (50) over the width of stern (18) and of the streamer deck (20) of the vessel. The or each trolley (40) is provided with a clamping device (70) which can be used to grip the inboard end of part of a multi-section streamer (28) deployed over the stern end of the streamer deck (20), so facilitating the transfer of parts of streamers from one streamer (28) station to another across the width of the streamer deck (20).
Claims18
Streamer handling apparatus for use on a seismic survey vessel, the apparatus comprising guide means adapted to be mounted on the streamer deck of the vessel, adjacent the stern end of the streamer deck, so as to extend transversely over at least a part of the width of the streamer deck, and trolley means movable across the streamer deck, the trolley means being adapted to engage the guide means so as to be guided thereby in its movement across the streamer deck, and including a clamping device for gripping the inboard end of part of a streamer whose other end is deployed over the stern end of the streamer deck.
A streamer handling apparatus for use on a seismic survey vessel, the apparatus comprising:
- a guide rail mounted on a streamer deck of the vessel and extending transversely over at least a part of the width of the streamer deck;
- a trolley comprising a guide wheel for engaging the guide rail to be guided thereby in its movement across the streamer deck, and a clamping device for gripping the inboard end of part of a streamer whose other end is deployed over the stern end of the streamer deck.
A method for streamer handling on a seismic survey vessel, the method comprising:
- reeling in a first streamer over a trolley until an inboard end of the first streamer reaches the trolley;
- clamping the inboard end of the first streamer to a clamping device;
- disconnecting the clamped portion of the first streamer from the remaining portion of the first streamer;
- moving the trolley and the clamped portion of the first streamer using a guide mounted on the vessel to a location of a second streamer;
- and
- connecting the clamped portion of the first streamer to an end of the second streamer.
Dependencies are inferred from the claim text.