A marine flexible hose cable heat tracing device and method

Abstract

The invention discloses a marine flexible hose cable heat tracing device and a method. A marine flexible hose cable heat tracing device is connected between an offshore production processing platform with a power supply device and an offshore production processing platform without a power supply device. The marine flexible hose cable heat tracing device includes the marine flexible hose and its matching connection device, the heat tracing cable and the matching connection device; the marine flexible hose is a multi-layer composite structure, including a hose skeleton layer, a hose The heating cable is arranged outside the skeleton layer, and it is divided into a decentralized marine flexible hose and a compact marine flexible hose according to the different layout of the heating cable. The thermal effect of the current is used to generate heat, and the subsea pipeline is continuously traced to ensure the safe operation of the subsea pipeline; it can also be switched between the active heat tracing mode and the power transmission mode according to the requirements of specific working conditions. The method has high efficiency, strong operability, high redundancy, high flexibility and low cost. Compared with conventional steel pipe heat tracing, it has obvious advantages in terrain adaptability, corrosion resistance, heat preservation, recyclability, etc. .

Description

technical field [0001] The invention relates to a heat tracing technology for marine oil and gas transportation, in particular to a marine flexible hose cable heat tracing device and method. Background technique [0002] With the continuous development of offshore oil and gas fields into deep water, flow assurance problems such as hydrate blockage, gelling of easily gelled oil, and paraffin deposition are emerging one after another. In particular, the selection of active heat tracing technology is crucial in the development of deep-water offshore oil. [0003] Traditional flow assurance measures, such as adding inhibitors, reducing pressure, adding dilute water, and fluid replacement, have problems such as complex operation, high cost, waste of resources, and environmental pollution to varying degrees. In order to deal with the problems of offshore extra heavy oil, high pour point oil transportation and hydrate prevention, and reduce the risk of flow safety, the patent (CN2...

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Problems solved by technology

[0004] However, in the harsh working environment of the deep sea, the laying and maintenance of steel pipes are more difficult. In addition, the complex fluid environment of the deep sea makes steel pipe corrosion problems emerge in endlessly, which constitutes a challenge for its long-term stable heat tracing application in submarine gathering and transportation pipelines. big challenge

[0005] Therefore, under the condition of long-term stable heat tracing on the seabed, the active heat tracing methods based on gathering and transportation steel pipes proposed by patents such as CN201606617U, CN102016000592137A, US10125223B1, and EP18176118A1 may not meet the safety needs of actual engineering, which seriously restricts offshore heavy oil and high-condensation oil fields. development

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