Well completion technique for efficiently controlling pressure and retaining water cone of horizontal well

The invention discloses a well completion technique for efficiently controlling pressure and retaining water cone of a horizontal well, comprising a method for efficiently controlling the pressure andretaining the water cone of the horizontal well, a device and matching technology and a theory. The method comprises the following steps: A, placing non-coupling oil tube with the function of controlling pressure and retaining bottom water coning at the middle position in the horizontal well channel; and B, setting an excluder in the horizontal well to exclude the annular space between the non-coupling oil tube and a barefoot well or to exclude the annular space between the non-coupling oil tube and a sieve tube, so that crude oil after emerging from stratum flows from two ends to the middleand only can be output by the non-coupling oil tube. The technique for efficiently controlling the pressure and retaining the water cone of the horizontal well not only can retain bottom water coning,but also can significantly improve individual-well producing rate, has simple completion technology, cheap and easily obtained raw materials, no environmental pollution, convenient oil field implementation, and low cost.