Polishing tool for scale in oil tube

Abstract

The invention discloses a polishing tool for scale in an oil tube. The polishing tool comprises a supporting cylinder and a scrubbing brush. A plurality of cutter sets are arranged on the supporting cylinder at intervals, gaps are reserved in the middles of the cutter sets, the supporting cylinder is provided with a swinging cavity concaved inwards, the top end of the swinging cavity is provided with radial water spraying holes communicated with a water injection channel, the top ends of the radial water spraying holes are fixedly provided with water spraying hoses which can freely move in the swinging cavity, and the moving ends of the water spraying hoses protrude out of the upper end of the swinging cavity and are arranged in the gaps. To solve the problem that in the prior art, the effect of cleaning the scale in the oil tube through the methods such as high-pressure water jetting washing, acid pickling and other chemical cleaning modes is not good, water-jetting washing and physical cutting modes are combined to conduct deep cleaning on mass compact hard calcium carbonate and sulfate scale in the oil tube to guarantee that the oil tube can be used again, and the problems that originally, the oil tube is washed difficultly, cost is high and washing is not thorough are solved.

Description

technical field [0001] The invention relates to the field of petroleum, in particular to a tool for grinding dirt in oil pipes. Background technique [0002] With the continuous development of the petroleum industry, the large number of sewage injection wells in various oil fields has increased the demand for various oil pipelines and water pipelines. After long-term use of oil and water pipelines, there will be many oil stains and dirt on the inner wall of the oil pipelines. Impurities, since the main components of the scale layer on the surface of oil and water pipes are hard and thick calcium carbonate scale and sulfate scale, containing a small amount of dense and hard Fe2O3, BaSO-4, S--rSO-4, when using oil and water pipes for oil well testing Dynamic monitoring work such as pressure measurement and water injection in the oil field are relatively clogged, which affects the monitoring results and brings difficulties to water injection. Sometimes it is often necessary to ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a tool for grinding dirt in oil pipes, which solves the problems of troublesome, high cost and incomplete cleaning of oil pipes in the past

In view of the poor effect of chemical cleaning methods such as high-pressure water jet cleaning and pickling on the dirt in the oil pipe in the prior art, the dense and hard calcium carbonate scale and sulfuric acid scale in the oil pipe are removed by combining water jet cleaning and physical cutting. Deep cleaning of salt scale is carried out to ensure the re-use of the oil pipe, which completely solves the problems of troublesome oil pipe cleaning, high cost and incomplete cleaning in the past; when the invention works, the front end of the supporting cylinder is placed in the oil pipe to ensure the safety of the knife group. The knife edge is in contact with the inner wall of the oil pipe, and the motor and the water pipe are connected at the end of the support cylinder. When the motor drives the support cylinder to rotate, the support cylinder is pushed forward, and then high-pressure water is injected into the water pipe, and the high-speed rotation of the knife group starts The dirt on the inner wall of the oil pipe is cut. At this time, the dirt and debris generated by the cutting of the cutter group are accumulated between the oil pipe and the support cylinder. The present invention leaves a gap in the middle of the cutter group, and on the outer wall of the support cylinder There is a swing cavity sunken to the inside, and the water spray hose is fixed in the swing cavity. The high-speed water flowing out through the water injection channel passes through the radial spray holes and then enters the water spray hose. The water spray hose itself has a certain The high-speed water flow can drive the movable end of the water spray hose to swing freely in the swing cavity, so that the spraying direction of the high-speed water flow is constantly changed, that is, the dirt and debris produced by the cutting of a single knife group are constantly rinsed. At the same time, the cleaning water flow forms a swirling flow with the rotation of the support cylinder, and then discharges the dirt and debris along the other end of the oil pipe, while the hard brush at the end of the support cylinder completely removes the residual dirt attached to the inner wall of the oil pipe. Clear, so as to achieve the purpose of oil pipe cleaning

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