Systems and methods are disclosed herein for improved wireline tension measurement and calibration in an oil-and-gas setting. An example method can include providing a machine-learning model configured to receive inputs associated with wireline tension. The inputs can include, for example, well-trajectory information, fluid density, fluid viscosity, toolstring type, cable type, and friction coefficient. The method can include providing some or all of those inputs and receiving an output from the machine-learning model of an estimated wireline tension. The method can also include receiving a second output of a wireline location recommended for measurement. A user can then perform a measurement at the suggested location and provide the measurement as an additional input to the machine-learning model.

Cable slack control systems for controlling cable slack and associated systems and methods are disclosed herein. In some embodiments, a cable slack control system includes two sliding carriage assemblies that can slide toward or away from one another, and biasing members disposed in between the sliding carriage assemblies. Each sliding carriage assembly can include a plurality of pullies that each receive a portion of a cable extending through the cable slack control system. When the cable is pulled out of the system, the tension in the cable causes the sliding carriage assemblies to slide toward one another and the biasing members to compress, letting cable out of the cable slack control system. When tension in the cable is released, producing cable slack, the biasing members push the sliding carriage assemblies away from one another, drawing cable into the cable slack control system.

Cable slack control systems for controlling cable slack and associated systems and methods are disclosed herein. In some embodiments, a cable slack control system includes two sliding carriage assemblies that can slide toward or away from one another, and biasing members disposed in between the sliding carriage assemblies. Each sliding carriage assembly can include a plurality of pullies that each receive a portion of a cable extending through the cable slack control system. When the cable is pulled out of the system, the tension in the cable causes the sliding carriage assemblies to slide toward one another and the biasing members to compress, letting cable out of the cable slack control system. When tension in the cable is released, producing cable slack, the biasing members push the sliding carriage assemblies away from one another, drawing cable into the cable slack control system.

A wave-induced motion compensation crane and corresponding vessel and method are disclosed. The crane includes a motion compensation device at a tip end portion of the boom structure to compensate for X-Y wave-induced motion and a heave compensation device for Z-motion. The motion compensation device includes a moveable jib beam that extends in a substantially horizontal direction. The jib beam is slewable about a substantially vertical slew axis and translatable in a longitudinal direction of the jib beam. Preferably, the jib beam can be levelled based on the angular orientation of the boom structure.

A wave-induced motion compensation crane and corresponding vessel and method are disclosed. The crane includes a motion compensation device at a tip end portion of the boom structure to compensate for X-Y wave-induced motion and a heave compensation device for Z-motion. The motion compensation device includes a moveable jib beam that extends in a substantially horizontal direction. The jib beam is slewable about a substantially vertical slew axis and translatable in a longitudinal direction of the jib beam. Preferably, the jib beam can be levelled based on the angular orientation of the boom structure.

The present invention relates to an apparatus for passively preventing a marine floating body from twisting during mooring by controlling tension in ropes connected to the marine floating body within a predetermined allowable limit. The apparatus includes: a floating main body connected to the ropes, fixed on the sea, and providing a space for marine work; winches disposed on the floating main body and retracting or releasing the ropes fixing the floating main body; fairleads disposed on portions of the floating main body and guiding the ropes to the winches through themselves; and braking units disposed on portions of the floating main body at a predetermined distance from the fairleads, with the ropes passing through the fairleads and themselves, and controlling a speed of the ropes that are retracted to the winches at a predetermined speed.

A drilling machine having: a string of telescopic rods provided with an excavation tool; a winch having a drum associated with a motor; a flexible pulling element connected on the one hand to the drum and on the other hand to the string of telescopic rods; a manual control element of the winch that can assume a first position, a second position and a third position; a control system configured for controlling the motor, in a first operating mode, so as to unwind the flexible pulling element from the drum when the manual control element is in the first position, wind the flexible pulling element on the drum in order to raise the string of telescopic rods when the manual control element is in the second position, stop the drum when the manual control element is in the third position; wherein it comprises a first manual selector adapted to select a second operating mode, and in that the control system is configured for controlling the motor, in the second operating mode, so as to wind the flexible pulling element on the drum in order to tension the flexible pulling element without raising the string of telescopic rods when the manual control element assumes the third position.

The invention relates to a tug controller and a tug for maneuvering a towed vessel, comprising a dynamic positioning system, and a tow equipment comprising a towline connected to the towed vessel, wherein the tow equipment is automatically controlled by the dynamic positioning system based on a plurality of input parameters.

The invention relates to a tug controller and a tug for maneuvering a towed vessel, comprising a dynamic positioning system, and a tow equipment comprising a towline connected to the towed vessel, wherein the tow equipment is automatically controlled by the dynamic positioning system based on a plurality of input parameters.

A bell design crown block for a top mounted compensator includes a removable, tilting sheave block mounted within the outside perimeter of a crown block yoke. An actuator installed in the crown block actuates the tilt function. No hinge adaptor is required and the sheave block does not hang past or below the crown block yoke. When used in a floating platform application, idler sheaves are mounted on the crown block yoke and an optional interface beam may be provided for the active heave cylinder head.