Chemical cutting is carried out by cable, current detonation, and chemical reaction between the cutting tools. The high-temperature and high-pressure chemical corrosive agent is sprayed from the hole in the lower part of the tool at high speed, corroding the cutting column and recovering the trapped tube. The technology of the column is a special tool for cutting from the inside of the column. It can cut the column at any position, and the chemical cutting is neat and tidy, which is convenient for subsequent fishing operations.
1 chemical cutting composition and working principle 1.1 composition structure chemical cutting tool structure: consists of magnetic locator + ignition head + propellant cartridge + anchor body + chemical cartridge + cutting head and other major components (see).
Ignition head. This type of ignition head can only use Irving's ignition tube. When the cable is energized to ignite the ignition tube, the ignition tube ignites the following propellant. This ignition head is unique in that it has a pressure-proof function.
Advance the cartridge. Since the propellant in the propellant cartridge can generate high pressure within 1 s, the propellant cartridge is made of seamless steel material with a pressure resistance of 196 MPa, ensuring reliable and high-pressure environment, and long service life; according to the cutting position and the well The pressure of the liquid selects the length of the gunpowder, the gunpowder is resistant to temperature 205, and there is no product after combustion.
Anchor body. The anchor claw on the anchor body is directly extended and fixed on the inner wall of the oil pipe. It is made of high-precision stainless steel material, and the anti-oxidation layer is protected to be used in any liquid. The anchor claw hard teeth are heat-treated, thus having The high-strength performance ensures that the number of cutting tools is increased and the construction cost is increased accordingly. The drying time is too short, the solvent volatilization is insufficient, the surface of the anti-corrosion layer is prone to bubbles; the drying time is too long, and the construction date is also increased. The fineness of the coating is large, the anti-corrosion layer is not bright, and the granular rough surface is present, and the anti-corrosion layer is small in density, which easily causes the medium to penetrate. Therefore, during construction, the performance and indicators of the coating should be strictly controlled to ensure the coating process and coating quality.
6 Conclusion After the NP1-5 and NP1-29 platforms of Jidong Oilfield were put into use in July 2009, the fire protection system was operated every month. After half a year, the fire protection pipelines using the inner coating technology were inspected and the inner coating of the pipeline was found. In good condition. With the development of offshore platforms and the increasing requirements for pipeline anti-corrosion life, the application of inner coating technology as a new technology in offshore platforms is increasing, and this technology will become the main anti-corrosion method for anti-corrosion in pipelines of offshore marine platforms.
RICTRON Industrial Co., Ltd is a hight-tech OEM/ODM enterprise, we are specialized to produce the products such as fire smoke alarm, carbon monoxiede alarm, gas alarm, water alarm, smoke&co or gas&co combined alarms, and other products of R&D, manufactring and sales since 2008.
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