| 摘要 |
A pipe-handling system is described, which includes at least two pipe-handling units (2, 2') arranged in a vertically displaceable manner along respective guide tracks (111) of, respectively, first and second portions (11, 11') of a tower (1), the pipe- handling unit (2, 2') being provided with lower and upper rotary units (23, 23') spaced apart vertically on a chassis (21), and each of the rotary units (23, 23') being provided with a rotatable tong (231) and a hanging-off device (232). A method of inserting and withdrawing a pipe string (3) in/from a borehole by the use of the pipe-handling system is described as well. |
