A liner completion method combining expandable casing and expandable screen

Abstract

The invention discloses a well completion method for a tail pipe combining an expansion sleeve pipe and an expansion sieve pipe. The expansion sleeve pipe and the expansion sieve pipe are combined on a pipe column of the tail pipe and expanded by sequentially adopting an expansion awl and a variable-diameter expansion tool. The implementation method includes: enabling the pipe column of the tail pipe combining the expansion sleeve pipe and the expansion sieve pipe to be down to a predetermined position in a well, under the hydraulic action, adopting the expansion awl to enable the expansion sleeve pipe to realize expansion, enabling the expansion sleeve pipe to be closely attached to an intermediate sleeve pipe and in a well bore through a rubber ring, and providing a hanging seal for a well completion pipe column; and adopting the variable-diameter expansion tool to expand the expansion sieve pipe to enable the same to be closely attached to the well bore to eliminate annular space between the sieve pipe and a well wall. The well completion method for the tail pipe combining the expansion sleeve pipe and the expansion sieve pipe has the advantages that the inner diameter of a tieback sleeve pipe can be increased after the expansion sleeve pipe is expanded, so that oil extraction and operation at later stages are facilitated; and the outer wall of the expansion sieve pipe can attach the well bore after the expansion sieve pipe is expanded, sand filtering effect is improved, sand preventing effect of the sieve pipe is improved, and development effects such as capacity and recovery ratio are improved.

Description

technical field [0001] The invention relates to a liner completion method combining an expandable casing and an expandable screen in the technical field of petroleum drilling and completion. technical background [0002] The expansion pipe technology is to lower the pipe string into the well, and make the pipe string undergo permanent plastic deformation by mechanical or hydraulic methods, so as to enlarge the inner diameter of the wellbore or the production pipe string. This technology can increase the casing layer, simplify the wellbore structure, save drilling cost, provide a more flexible completion method and a new workover method. , The expansion pipe mainly includes two types of expansion casing and expansion screen. [0003] At present, unconsolidated sandstone reservoirs in my country have a wide distribution range, large reserves, and production occupies an important position. Sand production from oil wells is the main contradiction in the exploitation of such res...

AI Technical Summary

Problems solved by technology

Although the expandable screen can be suitable for all kinds of casing completion wellbore, as well as the open hole with regular borehole wall, there are defects in technical problems such as sealing water layer and lost zone; at the same time, the expandable screen is connected back to the technical casing Generally, a piece of ordinary collarless casing still needs to be connected between the expansion screen and the large-diameter hanger, but the collarless casing does not expand, thus forming multiple steps in the pipe string, which is not conducive to the later stage. Easy production and operation

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