Patent ID: 9664014
Date: 2017-05-30
CPC Classifications: E21B

Claim:
1. A sectional flow control method for an oil-gas well comprising: forming a first annular space between a borehole wall of the oil-gas well and a perforated pipe, wherein the perforated pipe is located inside the oil-gas well and extends along an axial direction of the oil-gas well, wherein the perforated pipe is hung with a first packer between an upper portion of the perforated pipe and the borehole wall; forming a second annular space between the perforated pipe and a flow control filter string, wherein a flow control filter is provided on the flow control filter string, and the flow control filter string is located inside the perforated pipe and extends along the axial direction of the oil-gas well; filling anti-channeling pack-off particles into the first annular space and the second annular space such that fluid is capable of flowing in a penetration manner in the first annular space and the second annular space filled with the anti-channeling pack-off particles; and hanging the flow control filter string with a second packer between an upper portion of the flow control filter string and the borehole wall, wherein the second packer is located upstream from the first packer, and wherein a flow of the fluid along the axial direction of the oil-gas well is limited and thus a function of packing is realized, and a sectional flow is controlled by the flow control filter string.