A double-reeved lifting device includes a lower reeve block secured to a lifting hook and an upper reeve block, wherein the two reeve blocks include reversible connection means adapted to be reversibly configured between a connected configuration and a disconnected configuration. The reversible connection means include a locking mechanism and a complementary locking structure respectively having at least one striker orifice and a bolt slidably movable and supporting a locking finger adapted to rotatably cooperate with the striker orifice, and respective guide elements cooperating together so as to convert a relative approach and a relative distancing between the two reeve blocks into concomitants slidings and rotations of the bolt.

A method for mitigating the effects of cable wear in an active heave compensated hoisting system of an offshore vessel in a locked to bottom mode of operation is disclosed. The method comprises supporting an upper end of a string which is connected to a subsea well from a travelling block of the hoisting system, wherein the travelling block is suspended from a crown block via a cable. The method further comprises operating an active heave compensation system to control a drawworks of the hoisting system to pay in and out the cable to compensate for motion of the offshore vessel and maintain a target overpull in the string. The method further comprises adjusting a ballast system of the offshore vessel to vary the draft of the vessel, and controlling the drawworks in accordance with the variation in the draft of the vessel to cause a length of cable to slip through the hoisting system and maintain the target overpull in the string.

A hoisting system of this disclosure includes a drawworks, a crown block or a compensator, a traveling block and at least one sheave assembly connected to the crown block or compensator in “Low Load/High Speed” mode and connected to the traveling block in “High Load/Low Speed” mode. A method to lift a load using a hoisting system of this disclosure uses a drawworks, a crown block or a compensator, a traveling block and at least one sheave assembly connected to the crown block or compensator in “Low Load/High Speed” mode and connected to the traveling block in “High Load/Low Speed” mode.

A lifting crane having a jib and a lifting device with double reeving configured to distribute and lift a load along the jib, wherein the lifting device is reversibly configurable between two reeving configurations including a single reeving configuration with two lifting strands and a double reeving configuration with four lifting strands. The lifting device includes a reeving change system for performing a reeving change between the single reeving configuration and the double reeving configuration, and vice versa. The lifting crane further includes a system for automated determination of the reeving configured to automatically determine the reeving configuration between the single reeving configuration and the double reeving configuration.

A hoist for transferring the ends of power lines between supports at different locations including a pair of hoist mechanisms each having a respective tension line receiving drum and which are simultaneously operable with a single crank arm. Each drum has a respective ratchet mechanism that can be selectively set such that upon pivotable movement of the single crank arm between a first and second positions the ratchet mechanisms (i) simultaneously rotate both the drums in a take up direction for simultaneously winding said tensions lines onto the drums, (ii) simultaneously enable rotation of the drums in a release direction for simultaneously unwinding the tensions lines from the drums, or (iii) rotate one drum in a take-up direction for winding the respective tension line on the one drum while simultaneously enabling rotating the other drum in a release direction for unwinding the tension line from the other drum.

A vehicle winch game loader. The device includes a central support including a first pulley connected to an upper end thereof. A rear support is connected to the upper end of the central support. A front support includes a rear end connected to a lower end of the central support and a front end having a second pulley connected thereto. The front support extends in a direction opposite the rear support. A crossbar is connected to the lower end of the central support, wherein the crossbar is oriented perpendicular to the front support. A rear end of the rear support is configured to frictionally engage a rear end of a vehicle when the crossbar and the front support are supported on an upper surface of a front end of the vehicle. The device may be utilized to load game or other objects onto the vehicle using the vehicle's winch.

A double-reeved lifting device includes a lower reeve block secured to a lifting hook and an upper reeve block, wherein the two reeve blocks include reversible connection means adapted to be reversibly configured between a connected configuration and a disconnected configuration. The reversible connection means include a locking mechanism and a complementary locking structure respectively having at least one striker orifice and a bolt slidably movable and supporting a locking finger adapted to rotatably cooperate with the striker orifice, and respective guide elements cooperating together so as to convert a relative approach and a relative distancing between the two reeve blocks into concomitants slidings and rotations of the bolt.

A hoist assembly includes: a rope; a first mount having a base and a pulley attached to the base; a second mount having a base and a pulley attached to the base; a first lift pulley movably associated with the first mount with the rope; a second lift pulley moveably associated with the second mount with the rope; a pair of support straps; a bracket located on each of the first lift pulley and second lift pulley for receiving one of the pair of support straps and one or more apertures formed through a side wall of the bracket; and a lateral strap secured at a first end through the one or more apertures of the bracket of the first lift pulley and at a second end through the one or more apertures of the bracket of the second lift pulley.

Described herein is a hoist fleet system including a head block and a guide fleet assembly. The head block includes a plurality sheaves having more than one diameter. The guide fleet assembly can be arranged proximate the head block such that an array of lift lines can be routed through the plurality of sheaves of the head block into the guide fleet assembly. The guide fleet assembly further includes a plurality of guide sheaves and a plurality of plates. The plurality of plates is configured to house the plurality of guide sheaves. The plurality of guide sheaves is positioned substantially orthogonal to the head block. The plurality of plates is further arranged such that the plurality of guide sheaves is arranged on more than one plane. The plurality of guide sheaves is configured to reduce the spacing of the lift lines.

An automatic method for determining a physical end-of-travel position (zphys) of a reeve-block of a crane which may be moved in ascent and in descent by means of a lifting cable comprises a phase of ascent of the reeve-block during which a force on a strand of the lifting cable is monitored by a monitoring device, which may be a load sensor such as a gauge pin. The physical end-of-travel position is reached and determined depending a variation of the force on the strand of the lifting cable. From this physical end-of-travel position, a maximum end-of-travel position (zmax) may be determined in particular, which is a position not to be exceeded by the reeve-block when the crane is working.