Non-stop production online cleaning technology for oil pipeline of offshore oil production platform

Abstract

The invention provides a non-stop production online cleaning technology for an oil pipeline of an offshore oil production platform, which relates to the technical field of pipeline cleaning and comprises the following steps: taking air and water as media, generating high-speed rotating pulse jet flow and controllable gas-water pulse physical waves through explosion-proof intelligent numerical control gas-water pulse cleaning equipment, and cleaning the high-speed rotating pulse jet flow and the controllable gas-water pulse physical waves; the equipment integrates a pulse generating device, a remote control system and a pressure monitoring module. The method has the advantages that air and water are used as media, and the method is environment-friendly, safe and free of corrosion and pollution; on-line cleaning can be achieved without stopping production, efficiency and convenience are achieved, and cost is saved; the device is suitable for complex pipeline structures, various materials and complex scale bodies; the cleaning rate is not less than 95%, the pipe diameter recovery rate is not less than 90%, the flow recovery rate is not less than 90%, the pressure difference is not more than 0.3 MPa, and the effect is remarkable; the equipment meets the standard of offshore explosion prevention and is safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline cleaning, and in particular to an online cleaning technology for oil pipelines on offshore oil production platforms without stopping production. Background Art

[0002] During the operation of offshore oil platforms, complex scales such as oil, wax, rust, and barium strontium sulfate will gradually form in the oil pipelines. The presence of these scales will lead to a decrease in pipeline transportation efficiency, an increase in pressure, and may even cause safety accidents such as pipeline blockage and leakage.

[0003] Traditional pipeline cleaning technology, chemical cleaning technology has a large amount of waste liquid treatment, high difficulty, complex process flow, and cannot be implemented for long-distance and large-diameter pipelines. It is also not possible to achieve online cleaning without stopping production. PIG cleaning technology and high-pressure water jet cleaning technology cannot clean irregular scale in the pipe, and the hard scale cleaning effect is poor, which is prone to secondary blockage. It requires fire and earthwork, and also cannot achieve online cleaning without stopping production. Summary of the Invention

[0004] The purpose of the present invention is to provide an offshore oil platform oil pipeline non-stop online cleaning technology, to achieve efficient, environmentally friendly, safe and non-stop online cleaning of offshore oil platform oil pipelines, improve pipeline transportation efficiency and reduce safety risks.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a non-stop online cleaning technology for oil pipelines on offshore oil platforms, comprising the following steps: using air and water as media, generating high-speed rotating pulse jets and controllable air-water pulse physical waves through explosion-proof intelligent CNC air-water pulse cleaning equipment, the equipment integrating a pulse generator, a remote control system, and a pressure monitoring module;

[0006] The pulse jet and physical waves act on the rust and deposits in the pipes, peeling off the scale layer by layer through impact and vibration and discharging it into a closed sewage recovery system. This system is linked to the platform's central control system to monitor leakage risks.

[0007] The entire cleaning process does not require the addition of chemical agents and can be carried out without stopping the pipeline. The operating equipment must meet offshore explosion-proof, anti-tilt and noise control standards. The cleaning effect is tested by comparing the pipeline inlet and outlet flow and pressure.

[0008] As an improvement, the technology is applicable to pipeline parameters: pipe diameter ≤ 2m, effective length ≤ 100km; when the pipe diameter is greater than 2m or the effective length is greater than 100km, multiple cleaning equipment are used to operate in parallel.

[0009] As an improvement, the technical parameters of the CNC high-frequency pulse controller are: water pump limit pressure ≤40MPa, displacement ≤400L / min; air compressor pressure ≤15MPa, flow ≤20m 3 / min; the pulse frequency can be adjusted in the range of 10-100Hz.

[0010] As an improvement, the explosion-proof intelligent CNC air-water pulse cleaning equipment includes: a cleaning vehicle with an integrated pulse generator and a remote control system, which has an explosion-proof design; a modular air compressor equipped with a silencer to meet marine noise control standards.

[0011] As an improvement, the technology can clean scales including: oil scale, wax, rust scale, barium strontium sulfate scale and other complex scales, with a cleaning rate of ≥95% and a pipe diameter recovery rate of ≥90%.

[0012] As an improvement, the technology is applicable to the following pipeline structures: variable diameter pipelines, deformed pipelines, multi-bend pipelines and directly buried pipelines; oil pipelines, water injection pipelines and process pipelines made of steel pipes, PE pipes, etc.

[0013] As an improvement, the special requirements for the operating equipment include: electrical components are ATEX or IECEx explosion-proof certified, with an explosion-proof level ≥ ExIIBT4; the equipment base adopts a three-dimensional shock-absorbing structure and can withstand wind and wave vibrations ≤ level 6; the closed sewage recovery system volume is ≥ 1.5 times the pipeline volume and has an automatic liquid level alarm function.

[0014] As an improvement, the cleaning effect inspection standard is: pipeline flow recovery rate after cleaning ≥ 90% and pressure difference ≤ 0.3 MPa, where flow recovery rate = flow after cleaning / design flow × 100%.

[0015] The present invention offers several advantages: Environmentally friendly and safe, it uses air and water as the medium, eliminating the need for chemical agents, causing no corrosion to the pipeline network or water pollution, thus avoiding wastewater disposal challenges and environmental pollution. Highly efficient and convenient, it can be cleaned without interrupting production, eliminating the need for fire, earthwork, or dismantling the pipeline network, saving time and labor costs and improving operational efficiency. It is highly adaptable to complex pipeline structures such as variable diameter, deformed, multi-bend, and direct-buried pipelines, as well as pipes made of various materials, including steel and PE pipes, and containing complex scales such as oil, wax, rust, and barium strontium sulfate. The cleaning effect is remarkable, with a cleaning rate of ≥95%, a pipe diameter recovery rate of ≥90%, a flow recovery rate of ≥90%, and a pressure differential of ≤0.3 MPa after cleaning, effectively restoring pipeline transportation efficiency. The equipment is safe and reliable, meeting offshore explosion-proof, anti-tilt, and noise control standards. Its electrical components are explosion-proof certified, and the base features a three-dimensional shock-absorbing structure. The enclosed wastewater recovery system is linked to the platform's central control system to monitor leakage risks, and the transport medium can meet transportation requirements without heating, streamlining the process and reshaping existing concepts for crude oil transportation. This makes oil production platforms safer and more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a process framework diagram of a non-stop online cleaning technology for oil pipelines on offshore oil production platforms according to the present invention. DETAILED DESCRIPTION

[0017] like Figure 1 As shown, a non-stop online cleaning technology for oil pipelines on offshore oil platforms includes the following steps: using air and water as media, generating high-speed rotating pulse jets and controllable air-water pulse physical waves through explosion-proof intelligent CNC air-water pulse cleaning equipment, the equipment integrating a pulse generator, a remote control system, and a pressure monitoring module;

[0018] Pulsed jets and physical waves act on rust and deposits in the pipes, peeling off the scale layer by layer through impact and vibration and discharging it into a closed wastewater recovery system. This system is linked to the platform's central control system to monitor leakage risks.

[0019] The entire cleaning process does not require the addition of chemical agents and can be carried out without stopping the pipeline. The operating equipment must meet offshore explosion-proof, anti-tilt and noise control standards. The cleaning effect is tested by comparing the pipeline inlet and outlet flow and pressure.

[0020] The applicable pipeline parameters of the technology are: pipe diameter ≤ 2m, effective length ≤ 100km; when the pipe diameter is greater than 2m or the effective length is greater than 100km, multiple cleaning equipment are used in parallel operation; the technical parameters of the CNC high-frequency pulse controller are: water pump limit pressure ≤ 40MPa, displacement ≤ 400L / min; air compressor pressure ≤ 15MPa, flow ≤ 20m 3 / min; the pulse frequency can be adjusted in the range of 10-100Hz.

[0021] The explosion-proof intelligent CNC air-water pulse cleaning equipment includes: a cleaning vehicle with an integrated pulse generator and remote control system, which has an explosion-proof design; a modular air compressor equipped with a silencer to comply with marine noise control standards.

[0022] The technology can clean complex scales including oil, wax, rust, barium strontium sulfate, etc., with a cleaning rate of ≥95% and a pipe diameter recovery rate of ≥90%. The technology is applicable to the following pipeline structures: variable diameter pipes, deformed pipes, multi-bend pipes and direct buried pipes; and oil pipelines, water injection pipes and process pipelines including steel pipes and PE pipes.

[0023] Special requirements for operating equipment include: electrical components must be ATEX or IECEx explosion-proof certified, with an explosion-proof level ≥ ExIIBT4; the equipment base adopts a three-dimensional shock-absorbing structure and can withstand wind and wave vibrations ≤ level 6; the closed sewage recovery system volume is ≥ 1.5 times the pipeline volume and has an automatic liquid level alarm function; the cleaning effect inspection standard is: the pipeline flow recovery rate after cleaning is ≥ 90% and the pressure difference is ≤ 0.3MPa, where the flow recovery rate = flow after cleaning / design flow × 100%.

[0024] When in use, during the cleaning operation of the oil pipeline on the offshore oil production platform, first determine the number of cleaning equipment required based on the pipeline parameters, pipe diameter, and effective length. When the pipe diameter is ≤2m and the effective length is ≤100km, use a single explosion-proof intelligent CNC air-water pulse cleaning equipment to perform the operation; when the pipe diameter is greater than 2m or the effective length is greater than 100km, use multiple cleaning equipment in parallel and install the explosion-proof intelligent CNC air-water pulse cleaning equipment at the designated location on the offshore oil production platform. The equipment integrates a pulse generator, a remote control system, and a pressure monitoring module. The cleaning vehicle has an explosion-proof design. The modular air compressor is equipped with a silencer to meet the maritime explosion-proof and noise control standards. The electrical components are ATEX or IECEx explosion-proof certified, with an explosion-proof level ≥ ExIIBT4. The equipment base adopts a three-dimensional shock-absorbing structure and can withstand wind and wave vibrations ≤ level 6. The parameters of the water pump and air compressor are adjusted by a CNC high-frequency pulse controller using air and the client's original conveying medium to ensure that the water pump's ultimate pressure is ≤40MPa, the displacement is ≤400L / min, the air compressor pressure is ≤15MPa, and the flow rate is ≤20m 3 The system operates at a constant speed of 10-100 Hz, generating high-speed rotating pulse jets and controllable air-water pulse physical waves. These act on scale and deposits within the pipeline, gradually removing them through impact and vibration. The wastewater recovery system's volume is ≥ 1.5 times the pipeline's volume. It features an automatic level alarm and is linked to the platform's central control system for real-time leak risk monitoring. The entire cleaning process occurs while the pipeline remains operational, eliminating the need for chemical agents. After cleaning, the cleaning effect is verified by comparing the inlet and outlet flow rates and pressures. If the post-cleaning flow recovery rate is ≥ 90% and the pressure differential is ≤ 0.3 MPa (flow recovery rate = post-cleaning flow rate / design flow rate × 100%), the cleaning effect meets the requirements. The system also demonstrates significant cleaning effectiveness, eliminating the need for heating the transport medium to meet transport requirements. This streamlined process revolutionizes crude oil transportation, making the oil platform safer and more environmentally friendly.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A non-stop online cleaning technology for oil pipelines on offshore oil production platforms, characterized in that: The following steps are involved: Using air and water as media, a high-speed rotating pulse jet and controllable air-water pulse physical waves are generated by an explosion-proof intelligent CNC air-water pulse cleaning device, which integrates a pulse generator, a remote control system, and a pressure monitoring module; The pulse jet and physical waves act on the rust and deposits in the pipes, peeling off the scale layer by layer through impact and vibration and discharging it into a closed sewage recovery system. This system is linked to the platform's central control system to monitor leakage risks. The entire cleaning process does not require the addition of chemical agents and can be carried out without stopping the pipeline. The operating equipment must meet offshore explosion-proof, anti-tilt and noise control standards. The cleaning effect is tested by comparing the pipeline inlet and outlet flow and pressure.

2. The online cleaning technology for oil pipelines on offshore oil production platforms without stopping production according to claim 1 is characterized in that: The technology is applicable to pipeline parameters of: pipe diameter ≤ 2m, effective length ≤ 100km; when the pipe diameter is greater than 2m or the effective length is greater than 100km, multiple cleaning equipment are used in parallel operation.

3. The online cleaning technology for oil pipelines on offshore oil production platforms without stopping production according to claim 1 is characterized in that: The technical parameters of the digital high-frequency pulse controller are as follows: water pump limit pressure ≤ 40MPa, displacement ≤ 400L / min; air compressor pressure ≤ 15MPa, flow ≤ 20m 3 / min; the pulse frequency can be adjusted in the range of 10-100Hz.

4. The online cleaning technology for oil pipelines on offshore oil production platforms without stopping production according to claim 1 is characterized in that: The explosion-proof intelligent CNC air-water pulse cleaning equipment includes: a cleaning vehicle with an integrated pulse generator and a remote control system, which has an explosion-proof design; a modular air compressor equipped with a silencer to comply with marine noise control standards.

5. The online cleaning technology for oil pipelines on offshore oil production platforms without stopping production according to claim 1 is characterized in that: The technology can clean scales including oil scale, wax scale, rust scale, barium strontium sulfate scale and other complex scales, with a cleaning rate of ≥95% and a pipe diameter recovery rate of ≥90%.

6. The online cleaning technology for oil pipelines on offshore oil production platforms without stopping production according to claim 1 is characterized in that: The technology is applicable to the following pipeline structures: variable diameter pipelines, deformed pipelines, multi-bend pipelines and directly buried pipelines; oil pipelines, water injection pipelines and process pipelines made of steel pipes, PE pipes, etc.

7. The online cleaning technology for oil pipelines on offshore oil production platforms without stopping production according to claim 1 is characterized in that: The special requirements for the operating equipment include: electrical components must pass ATEX or IECEx explosion-proof certification, with an explosion-proof level ≥ ExIIBT4; the equipment base adopts a three-dimensional shock-absorbing structure and can withstand wind and wave vibrations ≤ level 6; the closed sewage recovery system volume is ≥ 1.5 times the pipeline volume and has an automatic liquid level alarm function.

8. The online cleaning technology for oil pipelines on offshore oil production platforms without stopping production according to claim 1 is characterized in that: The cleaning effect inspection standard is: the pipeline flow recovery rate after cleaning is ≥90% and the pressure difference is ≤0.3MPa, where the flow recovery rate = flow after cleaning / design flow × 100%.

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