Integrated pipe column for accurate quantitative injection and seal examination and seal examination method thereof

Abstract

The invention discloses an integrated pipe column for accurate quantitative injection and seal examination and a seal examination method thereof. A through hole round head pipe shoe (1), a first ball seat (2), a first expansion type packer (4), a throttling connector (5), a second expansion type packer (7), a second ball seat (8), a third ball seat (9) and a third expansion type packer (11) are sequentially arranged on the pipe column from bottom to top, wherein the through hole round head pipe shoe and the throttling connector are communicated with the inside and the outside of the pipe column, and the diameter of the first ball seat, the diameter of the second ball seat and the diameter of the third ball seat are sequentially increased. By ball throwing, an ACP material in a sieve pipe and the ACP material outside a first section of sieve pipe can be injected continuously through the ball seat of the model 1.25, the accurate quantitative injection of a first section of ACP material can be achieved through the ball seat of the model 1.5, the accurate quantitative injection of a second section of ACP material is achieved through the ball seat of the model 1.65, and over displacement and surplus excess of the ACP material in an oil pipe is avoided. By means of the integrated pipe column, not only can the ACP material be injected accurately quantitatively, but also tripping operation can be reduced once, and working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploitation, and specifically refers to an integrated pipe string for precise quantitative injection and seal inspection and a seal inspection method thereof. Background technique [0002] At present, in the field of oil exploitation, horizontal wells increase the length of the wellbore in the production layer and the oil drainage area of ​​the production layer, which can develop oil reservoirs under low pressure difference and increase the drilling rate of reservoirs and fractures. [0003] Due to the annulus between the screen and the well wall in horizontal wells completed with screens, it is difficult to implement various measures to control water and stabilize oil after the water cut in horizontal wells rises. Annulus chemical packer (ACP) technology is an effective way to realize the segmentation of horizontal wells outside the tubular. This technology uses an in-pipe straddle packer t...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to avoid the deficiencies in the prior art and provide a precise quantitative injection and seal inspection integrated pipe string and its seal inspection method, which solves the problem that the existing ACP material injection process cannot be injected accurately and quantitatively, and the one-pass injection pipe The problem that the column cannot build up two slugs inside and outside the screen at the same time

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