A two-stage hydraulic rotary jet block cleaner

Abstract

The invention discloses a double-stage hydraulic power rotation jet flow blockage cleaning device which includes an outer barrel, a first stage screw, a connecting end cover, a first stage dowel, a first stage centralizer, a second stage dowel, a second stage screw, a second stage centralizer and a rotary sprayer, wherein the first stage screw sleeves the outer side at the upper part of the second stage screw; the outer barrel sleeves the outer side at the upper part of the first stage screw, and the matching relation of the first stage screw, the second stage screw and the outer barrel are all in clearance fit; the connecting end cover is connected with the lower end of the outer barrel; the outer barrel is in threaded connection with the connecting end cover with the taper ratio of 1:16; the rotary sprayer is connected to the bottom of the second stage screw; four nozzles are uniformly distributed on the rotary sprayer; the included angle of the centre line of the heads of the nozzles and the axial direction of the rotary sprayer is 10-30 degrees and the included angle of the centre line of the heads of the nozzles and the radial direction of the rotary sprayer is 20-45 degrees. The double-stage hydraulic power rotation jet flow blockage cleaning device is simple in structure, can be used for completely cleaning the entire oil layer perforation section quickly and efficiently with high quality and without damage.

Description

technical field [0001] The invention relates to an underground block removal device, in particular to a two-stage hydraulic rotary jet block removal device. Background technique [0002] In high-water-cut late-stage oilfields and heavy-oil low-permeability oilfields, due to pollution and mechanical impurity precipitation during drilling, well completion, downhole operations, and long-term oil production and water injection, the pore channels in the near-wellbore area are very blocked, resulting in oil production of oil-water wells. And the water injection volume drops or even stops production. The current plugging removal technology has the following three types: 1. In the past, the ground mechanical lifting device was used to lift and lower the pipe string to achieve cleaning within a certain range of oil layers, but automatic reciprocating motion could not be realized; 2. The use of volumetric motors, milling cutters, Impact hammer with milling cutter or pure liquid jet c...

AI Technical Summary

Problems solved by technology

The current plugging removal technology has the following three types: 1. In the past, the ground mechanical lifting device was used to lift and lower the pipe string to achieve cleaning within a certain range of oil layers, but automatic reciprocating motion could not be realized; 2. The use of volumetric motors, milling cutters, Impact hammer with milling cutter or pure liquid jet cleaning, but milling cutters and similar cutting tools will endanger the integrity of the pipeline during operation; Injection well jet plugging device that can perform well cleaning and pulse treatment on the oil layer, all of which are destructive to the wellbore and formation conditions

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