The load is hoisted or lowered by a whip or a purchase, which is rove through a block at the derrick head and a leading block at the heel and then taken to a winch.
Umthwalo uthi unyuswe okanye uhliswe sisabhokhwe okanye kukuthengwa efakelwe kwibhloko kwisilenge kunye nebhloko ekhokelayo kuqethukiso ze ithathwe isiwe kwisixhobo sokutsala okanye sokonyusa.