Heating device and method for closed type towing chain heat preservation

Abstract

The invention provides a heating device and method for closed type towing chain heat preservation. The heating device comprises an air heater. A fan and an electric heater are arranged in the air heater and connected with a power source. Air inlets are formed in the air inlet side of the air heater, and air outlets are formed in the air outlet side of the air heater and connected with heating pipes. The heating pipes penetrate through a closed type heat preservation towing chain, and heat dissipation holes are formed in the heating pipes. The heating device and method for closed type towing chain heat preservation can solve the problem that liquid media in pipelines in towing chains are frozen in winter, guarantee normal operation of well drilling and well repair and prevent cables againstfrost cracks.

Description

technical field [0001] The present invention relates to the technical field of drag chains for drilling and workover rigs on offshore platforms, and more specifically, to a heating device and heating method for heat preservation of closed drag chains. Background technique [0002] On offshore oil and gas platforms, pipelines and various cables for transporting materials such as oil, seawater, fresh water, drinking water, and firefighting water are usually arranged in modules. Due to the action of seawater, the relative positions of each module usually change. Drag chains for drilling and workover rigs on offshore platforms are often used to connect pipelines and cables in each module. [0003] At present, the drag chain structure is mostly an open design, and the pipes and cables in the drag chain will be directly exposed to the atmosphere. The seawater, fresh water, drinking water, fire water and diesel pipelines that pass through the drag chain of drilling and workover ri...

AI Technical Summary

Problems solved by technology

The seawater, fresh water, drinking water, fire water and diesel pipelines that pass through the drag chain of drilling and workover rigs generally use hoses, which have poor low temperature resistance. Too low ambient temperature will cause the hoses to freeze or even crack, which will lead to cables, platforms, etc. Equipment and personnel bring potential safety hazards; and the hose is directly exposed to the atmosphere, unable to keep heat and store heat

When working in winter, the medium in the pipeline will freeze in a low-temperature environment due to its low freezing point. In severe cases, the hose will crack, which can easily lead to safety accidents

In order to meet the response time, the firefighting water system is usually designed as a wet firefighting system. During daily drilling and workover operations, the pipeline needs to be filled with pressurized firefighting water. If the liquid in the pipeline is discharged, once a fire breaks out on the rig floor, the consequences will be disastrous

In addition, once the fresh water in the liquid supply pipeline of the safety eyewash station freezes, it will also affect the emergency flushing of on-site operators

Frequent maintenance of the hose in the drag chain will delay the construction period, seriously affect the work efficiency of drilling and workover operations, and even cause huge economic losses

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