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The camera tractor, with a flexible cable attached to the rear, is then lowered into the pipeline. The tractor is moved forward so that it is barely inside of the pipeline. A "down-hole roller" is set up between the camera tractor and the cable reel in the service truck, preventing cable damage from rubbing the top of the pipeline.
A come-along. A come-along, also known as a power puller, is a hand-operated winch with a ratchet used to pull objects. The drum is wrapped with wire rope.A similar tool that uses a nylon strap is used to straighten trees, as it straightens gradually over time, therefore not splitting the trunk.
[3] [4] The snubbing winch is used to pull vehicles out of mud, snow, sand, rocks, and water, and to pull vehicles through or over obstacles. The winch is made of cable made up of a braided synthetic rope, or a steel cable wrapped around a motorized drum. Each is controlled electronically, allowing the operator to control the winch speed. [5]
A logging donkey consists of a steam boiler and steam engine, [5] [6] connected to a winch mounted on a sled called a donkey sled. [7] [8] The donkeys were moved by simply dragging themselves with the winch line, originally hemp rope and later steel cable. They were used to move logs, by attaching lines to the logs and hauling them.
A towing sock or wire rope puller or wire pulling grip is a device that connects to the end of a cable, such as a power cable, in order to pull it through a tube or tunnel. [1] It works by tightening around the cable when pulled, in the same manner as a Chinese finger trap . [ 2 ]
To run on tracks away from overhead lines, the power cable was clipped to the overhead line and then automatically unreeled as the locomotive advanced and reeled up as the locomotive returned. [54] [55] [56] Crab locomotives were equipped with a winch for pulling cars out of the un-powered tracks. This approach allowed use of temporary track ...