System for cleaning outer wall of oil pipe at wellhead, device and method thereof

Abstract

The invention discloses a system for cleaning an outer wall of an oil pipe at a wellhead, a device and a method thereof; a steam inlet of a well head cleaning device is connected with a steam generating device, and a fluid outlet of the well head cleaning device is connected with a recycling device; the device comprises two shell bodies with the same structure, the inner parts of the shell bodies are hollow and both ends are opened; a spraying ring and an absorbing ring are arranged between the shell bodies, and the spraying ring is in seamless connection with the absorbing ring and one shell body; the absorbing ring is in seamless connection with the spraying ring and the other shell body at the same time. The system, the device and the method adopt the sealed steam cleaning at the wellhead; the steam utilization rate is high, the outer wall of the oil tube can be cleaned rapidly, and the cleaning efficiency is improved; meanwhile, steam cannot be overflowed, and the safety is improved; steam and cleaned materials can be intensively recycled, and free from residue overflow, and can prevent environmental pollution.

Description

technical field [0001] The invention relates to a cleaning tool, in particular to a system, device and method for cleaning the outer wall of an oil pipe at the wellhead. Background technique [0002] Petroleum is mainly a mixture solution composed of various components of hydrocarbons. At present, my country's crude oil is rich in wax. According to statistics, crude oil with a wax content of more than 10% accounts for almost 90% of the entire output of crude oil, and most of the crude oil extracted The wax content is above 20%, which reduces the permeability of the oil layer. In oil and gas extraction, wax is separated and precipitated from oil, and continuous wax deposition will lead to blockage of oil-producing layers, decline in oil well production, and even shutdown of production, bringing troubles to production. The commonly used wax removal method is to lift the sucker rods and tubing in the oil well to the ground one by one, and then spray and clean them with high-tem...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the efficiency of open steam cleaning is low at present, and the leaked steam causes potential safety hazards. At the same time, the cleaned substances are easy to cause environmental pollution. The purpose is to provide a system for cleaning the outer wall of the oil pipe at the wellhead, The device and method. The system, device and method adopt closed steam cleaning at the wellhead, which has high cleaning efficiency and high safety. At the same time, it can realize concentrated recovery of steam and cleaned substances, without leakage of residues, and prevents environmental pollution.

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