摘要:
A crane includes a boom and a derricking mechanism, wherein: the derricking mechanism includes a linking device connecting one end of a guy line to a distal end of the boom; the linking device includes a joint connected to one end of the guy line, and a support device provided on the distal end to support the joint so as to locate the joint at a position away from the back surface and opposite to the ventral surface; and the support device includes a holding member which holds the joint, the holding member allowing the position of the joint to be selectively changed to a plurality of different positions in a first direction perpendicularly intersecting an axis of the boom and a rotary axis of the boom.
摘要:
An oil derrick comprising a derrick tower, where the derrick tower is asymmetrical about its z axis in both x and y directions. The dual offset derrick tower structure allows for a unique drill floor arrangement.
摘要:
A method of deploying an object (14) onto the seabed in very deep water from a vessel having a heave compensated deck crane (12), comprises lowering the object a distance into the sea while being suspended in the crane wire (16).In an initial step, a first fibre rope section (4a) of a first length is connected to the object (14) via a first connector (3a) on the object before the lowering is started and is freely run out supporting from a storage reel (13) during the descent. Subsequently, the first rope section is the object via a second connector (3b) located at the upper end of the first rope section (4a), the second connector being supported by a support mechanism (1) on the vessel deck (8), followed by off-loading the crane wire (16) and disconnecting it from the object and heaving it up said first length for connection to the second connector (3b) at the vessel deck and taking over the load of the object. Next, the object (14) is lowered a second length into the water by the crane while a second rope section (4b) connected to the second connector is freely run out from a storage reel (13) until a third connector (3c) located at the upper end of the second rope supports the load of the object in the support mechanism (1), whereupon the crane hook can be released and be brought up for re-connection to the third connector (3c) for the subsequent deployment, and any further deployment by addition to the string of ropes, thereby allowing the object (14) to reach a depth of up to 3000 meter, or even more.
摘要:
A portable tree platform elevated via a winch including a planar platform with at least one support rod coupled at a first end thereof to the platform and extending upwardly therefrom. A pair of wheels are rotatably coupled to the periphery of the platform adjacent the support rod such that the platform may be easily transported in a manner similar to a cart. Further provided is a winch unit including a spool and a motor connected to a battery. The motor is adapted for effecting the gathering of the cable on the spool upon the actuation thereof in a first mode of operation and further effecting the dispensing of the cable from the spool upon the actuation thereof in a second mode of operation. By this structure, an end of the cable may be fixed in an upper extent of a tree such that upon the actuation of the motor in the first mode of operation, the platform is elevated.
摘要:
A log lifter particularly designed to elevate a portion of a large log to facilitate cutting the log into shorter lengths, wherein the log lifter includes a collapsible support frame with a hoist mechanism mounted thereon and a log gripping clamp connected with the hoist mechanism for lifting the log.
摘要:
In cargo handling apparatus with a cargo boom which can be swung between two kingposts, in which the cargo boom is provided at its upper end with an extension 1 which projects beyond the fittings of the main hoist, with a block fitting 2 for an auxiliary hoist being attached to the extension and with the auxiliary hoist being so rotatably arranged around the cargo boom axis that the lower edge of the auxiliary hoist cargo hook is free of the fittings of the main hoist with an approximately vertical position of the cargo boom, a block fitting 12 connected, fixedly or for only limited rotational movement, by means of a second extension 11 of the cargo boom with the block fitting of the first auxiliary hoist and is so arranged that, with the lower cargo block 15 in the raised position and with an approximately vertical position of the cargo boom, the lower side of the cargo hook of the second auxiliary hoist is also free of the block fitting of the first auxiliary hoist.
摘要:
The present invention relates to copper, nickel, chromium or cobalt complexes of azo or azomethine dyes which contain a group of the formula ##STR1## wherein Z is a bridge Member of the formula--SO.sub.2 --, ##STR2## wherein R is hydrogen or a low molecular alkylene radical or an arylene radical, Ar is an arylene radical, m is 1 or 2 and U is a sulpho or carboxy group.
摘要:
A new and improved portable hydraulic rig for performing workover, drilling or other operations on a well, usually a petroleum well, wherein the rig has a telescoping mast for telescoping to a reduced length for transportation, wherein the mast is cantilevered in use so that the travelling block moves vertically at one side of the mast, wherein the cable for the travelling block is reeved over the various sheaves including a sheaves on a hydraulic power assembly with the dead end of the line being fastened at or in proximity to the rig floor for balanced loading on the legs of the mast and to enable slack in the cables to be taken up when telescoping the mast.