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Upgrades Structural modifications, top drive conversions, guide rail replacement, crown and travelling block refurbishment can be undertaken.
Note, that systems where the passenger supports their own weight from the travelling block must be totally suspended over water for the entire length of the flying fox.
Engaging the crown saver automatically releases the drawworks hositing clutch and engages the drum brakes, as this mechanism is designed to prevent the travelling blocks from hitting the derrick mast crown (sheaves).
Godsal however who had reservations about existing bolt action breech mechanisms continued over the next twenty years to develop rifles based on a travelling block principle, although none of them including an anti tank rifle developed in World War One were adopted by the military.
Its main function is to provide a means of raising and lowering the traveling blocks.
On larger diameter lines, traveling block loads of over a million pounds are possible.
"Somebody could always shinny up the cable on that traveling block," Jack said.
It is a thick, strong rope made from manila with a traveling block attached.
Check to see that the traveling block elevators hang properly over the centerline of the well.
Drill string compensator between the traveling block and hook .
A derrickman was killed when a hoist line failed after the traveling block ran into the rig crown.
Hawser and traveling block: The hawser is the work horse of all the lines.
From my knowledge of this industry it appears that rigging training, inspections and maintenance is focused primarily on the traveling blocks and draw works operations.
It is attached to the traveling block which rides along the hawser and pulled back and forth by the surfmen manning the whip line.
A pipe-conveyed logging tool is attached to the bottom of the drill string and run down to the desired interval using the drilling rig traveling blocks.
In recent years, a number of triple stand drilling rigs have been severely damaged due to traveling block contact with the crown assembly of the rig.
On September 15, 2000, a drilling crew was removing pipe from the well bore when the traveling block contacted the crown assembly of the drilling rig.
When elevators are attached to a hook on the traveling block and drill pipe latched in the elevators, the pipe can be raised or lowered.
The combination of the traveling block, crown block and wire rope drill line gives the ability to lift weights in the hundreds of thousands of pounds.
Just as an ordinary bucket is hung from a hook by its bail, the swivel is hung from the traveling block's hook by its bail.
The drilling line then enters the sheaves of the crown block and it makes several passes between the crown block and traveling block pulleys for mechanical advantage.
No person shall use the traveling blocks or a non man-rated tugger to lift a worker unless doing so is permitted in the manufacturer's specifications certified by a professional engineer.
The wire-rope drilling line winds on the drawworks drum and extends to the crown block and traveling blocks, allowing the drill string to be moved up and down as the drum turns.
The vessel is Dynamically Positioned and features a purpose-built derrick over a 7 m x 5 m moonpool and a traveling block rated to 80 Te capacity in passive mode.
Coke plastered billboards with Kuat ads and showered gifts on some of Rio's most popular traveling block parties, providing the sweaty crowd with paper fans and kerchiefs with the Kuat logo.
A crown block is the stationary section of a block and tackle that contains a set of pulleys or sheaves through which the drill line (wire rope) is threaded or reeved and is opposite and above the traveling block.
In a drilling rig, the drill line is a multi-thread, twisted wire rope that is threaded or reeved through the traveling block and crown block to facilitate the lowering and lifting of the drill string into and out of the wellbore.
