A connector for a cable having a core stress member surrounded by a secondary stress member may include a connector body, a wedge, a retainer, a molded body, and a collar. The connector body may have at least one flow channel formed on an inner surface of the distal end and at least one radial hole providing fluid communication to the at least one flow channel. The wedge is disposed in a pocket of the connector body and is attachable to the core stress member. The molded body surrounds the distal end, fills the at least one flow channel, and attaches to the secondary stress member. The collar may at least partially enclose the connector body.

It is described an attachment device (2) for attaching a seismic node to a cable (1), the attachment device comprising an in-line fastening device (6) fastening the cable (1); and at least one locking device (3) securing the cable (1) in the at least one in-line fastening device (6). The locking device (3) prevents the cable (1) from escaping the fastening device (6). A seismic node and a method for deployment and retrieval of a number of seismic nodes are also described.

A system (1) for operating a subsea sensor field (2), comprises an automated underwater vehicleAUV (10) and a subsea service station (13). A sensor (11, 12) in the sensor field (2) comprises a permanently installed base unit (11) and a removable control unit (12). The AUV (10) moves control units (12) to the service station (13) for charging and updating, and then back to the base units. The permanent positions of the base units (11) facilitate time-lapse surveys, and saves energy as heavy equipment may remain on the seafloor.

An apparatus that is usable with a well includes a cable, a sensor module that contains seismic sensors, and a bulkhead connection. The bulkhead connection connects the cable to the sensor module at a radial offset with respect to the longitudinal axis of the cable.

Systems and methods of deploying seismic data acquisition units from a marine vessel are disclosed. The system can include a spindle coupled to a tether. A robotic arm can couple the spindle to a tether via one or more tumblers. The tether can connect to a seismic data acquisition unit via a connection block having a mechanical force device. The assembled spindle, tether and seismic data acquisition unit can be deployed from the deck via a deployment block.

A stress relief device is provided for a connector. The connector is connected to a cable and configured for cooperating with a complementary connector along a longitudinal axis. The stress relief device includes: an anchor configured for being placed around a portion of the cable so as to allow a stress relief of the portion of the cable, the portion of the cable being adjacent to the connector; a shell configured for being connected to the anchor and for at least partially wrapping the connector; and a locking system configured for connecting and locking the shell to a similar shell of a similar stress relief device for the complementary connector. The stress relief device is detachably mountable on the connector and is configured such that its mounting/dismounting does not require any change in the connection/disconnection of the connectors to one another.

A connector for a cable having a core stress member surrounded by a secondary stress member may include a connector body, a wedge, a retainer, a molded body, and a collar. The connector body may have at least one flow channel formed on an inner surface of the distal end and at least one radial hole providing fluid communication to the at least one flow channel. The wedge is disposed in a pocket of the connector body and is attachable to the core stress member. The molded body surrounds the distal end, fills the at least one flow channel, and attaches to the secondary stress member. The collar may at least partially enclose the connector body.

A marine seismic sensor system includes a seismic node having at least one seismic sensor. The sensor is configured for sampling seismic energy when towed through a water column on a rope. The coupling can be adapted to modulate transmission of acceleration from the rope to the seismic node.

A connecting module for connecting seismic equipment towed in water, includes a housing having first and second ends opposite to each other, a removable connecting part removably attached to the first end of the housing, an integral connecting part integrally made with the housing at the second end, the integral connecting part having a bore, and one or more pins configured to enter from an outside of the integral connecting part into the bore. An end of the one or more pins has a conical surface that is configured to transfer a radial force F.sub.R applied to the one or more pins, as a longitudinal force F.sub.L to an electrical insert to be placed in the bore.