Anti-blocking sieve tube column integrating oil collection and sand flushing

Abstract

The invention discloses an anti-blocking screen pipe string integrating oil production and sand washing, which includes a collar, a screen pipe and a sand washing pipe. The top end of the screen pipe is connected with the collar, and the bottom end of the screen pipe passes through an inner blind plate Connected and set inside the sand washing pipe, the bottom blind plate of the screen pipe is fixed on the sand washing pipe through shear pins, and an axial sliding mechanism is connected between the two, and an inner screen is provided at the lower end of the screen pipe The sand washing hole is equipped with a locking device at the upper end of the sand washing pipe, and an outer sand washing hole is provided at the lower end, and the pipe column is properly pressurized. After the shear pin is cut off, the two are relatively opposite through an axial sliding mechanism. Sliding, the locking device of the sand washing pipe is connected with the coupling, and the two are locked, and the inner sand washing hole and the outer sand washing hole are connected correspondingly. The invention has one tube with two functions, which combines the functions of the screen tube and the sand washing tube into one, and has the advantages of liquid inflow and flow prevention, and can resume normal production progress in time even when the screen is blocked or stuck. The liquid function can finally prolong the repair-free period of the oil well and further improve the operation efficiency.

Description

technical field [0001] The invention relates to an anti-blocking screen string, in particular to an anti-blocking screen string integrating oil production and sand washing. Background technique [0002] The bottom of the tailpipe of the oil pump string (commonly known as the pipe shoe) needs to be installed with a screen. The diameter of the dense mesh on the pipe wall is generally 5 to 8 mm. The screen is used as the inlet for the well fluid in the casing to enter the pump. The main functions are: First, to filter large particles of impurities in the well fluid, such as packer rubber fragments, cement fragments, etc., to avoid foreign matter jamming pump valve failure, but it should be noted that not all oil wells have There are large particles of impurities such as packer rubber fragments and cement fragments, and there is a certain probability that foreign matter will be sucked into the pump, that is, the core function of the mesh is to guide liquid into the pump; Simple...

AI Technical Summary

Problems solved by technology

[0004] As a result, there are obvious disadvantages: First, once the mesh of the screen is blocked or smeared, the pipe string will immediately fail and lie in the well, requiring pump inspection operations to replace tools to resume normal production,

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