| 摘要 |
<p>A method of reducing the maximum weight per trip for transporting by helicopter the components required for outfitting a derrick for drilling an oil or gas well in which a major weight component is the line utilized with the derrick drawworks and in which the line is formed of a plurality of twisted together individual cables including, untwisting the line into separate cables and simultaneously winding the separate cables on individual spools, transporting the individual spools by helicopter to the location where a derrick with the required components is to be assembled for drilling an oil or gas well and at the derrick location retwisting the individual cables from the individual spools into a line to substantially reform the line as it originally existed. The method is accomplished with a machine for unwinding a line formed of a center cable and a plurality of outer cables wound about the center cable, the machine having a rotating splitter head with a central passageway therethrough for receiving the line center cable and a plurality of outer passageways each for receiving a line outer cable, a center cable spool spaced from the splitter head and positioned to receive and wind the center cable thereon, an array of outer cable spools supported on a spoke structure spaced from the splitter head, the spoke structure being rotated, there being an outer cable spool for each outer cable of the line, each outer cable spools having an axis of rotation, the center cable spool and each of the outer cable spools being about their individual axis of rotation to wind thereon the center and outer cables.</p> |
