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About Huafu
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Oil & Gas Electrical Heating EOR
We have been engaged in the development and application of oil well electric heating technologies for more than 20 years, and we own independent intellectual property rights for our core technologies. Among them, "hollow rod pumping electric heating oil extraction device" has been included in the national torch plan project; and "intelligent medium-frequency electric heating oil extraction device" was evaluated as a national key new product.
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Oil well electric heating production technology and device and pipeline skin effect current tracing (SECT) technology and device are our leading technologies and products. So far, our oil well electric heating production technology and device have been applied to more than 4,000 wells in China's oil fields, with a heating depth of 110-3,800m and a heating power of 12-500kW.Our pipeline SECT technology and device have been applied to more than 300-km pipelines in China, with a heat tracing length of 100-50,000 m and a tracing power of 6-3,000 kW. Throughour agents and cooperating partners, we have made the technologies and devices applied or tested in the oil fields of the United States, Canada, Turkey, Gabon, Niger, Malaysia, and Indonesia. |
RELATED PRODUCTS
Electric heating technology to remove paraffin and reduce the viscosity of oil is to run heating cable (coiled tubing sheathed cable or rubber insulated cable) into the tubing or hollow sucker rod (with a hollow section at the upper part). The system is powered from the surface. Under the effects of skin effect and proximity, the coiled tubing sheathed cable or hollow sucker rod becomes heated to improve the temperatures of fluid flow and wellbore equipment. For a well having the problem of precipitated paraffin, the paraffin can be melted by heating, and then removed and controlled. Thus, oil heating and paraffin removal and control are realized in the process of lifting. Depending on the situation of paraffin precipitation in wellbore and the change in oil production, timing for powering up cable to remove paraffin can be selected. Meanwhile, the recovery of production is observed to determined the paraffin removal effect. Running of the electric heating system shall be stopped immediately after the expected effect is achieved. In this way, continuous or intermittent paraffin removal is realized. For a heavy oil well, heating reduces the viscosity of heavy oil to improve its fluidity, realizing the purpose of continuous production. This technology is widely applicable to various rod wells, rodless wells or flowing wells.
Mobile electric ignition system and operation equipment
A mobile electric ignition system comprises a central electric heater connected to the lower part of an equal-diameter coiled tubing sheathed cable. A coiled tubing conveyed igniter is lowered to the target layer in the wellbore to heat the perforated interval by using coiled tubing operation equipment, so that temperature of the near-wellbore zone of the well section rise to over the spontaneous combustion point of the combustible medium in the oil layer.
Pipeline SECT (heating) technology is a new metal pipeline heating method that appeared in the middle of the last century. It is a new technology and process for the heating and thermal insulation of heated transmission pipelines of large petrochemical enterprises, which is suitable for the heat tracing and heating of all long, medium and short distance metal liquid transmission pipelines, featuring high efficiency, safety, high reliability, and convenient installation and maintenance. Therefore, it is widely used in the pipeline transportation of various liquids with different properties.
Coiled tubing sheathed heating cable
After an oxygen-free copper rod is drawn and straightened, insulating and packing layers are mechanically wound, which is then subjected to sintering in an electric furnace to make the insulating layer integrated. After being pulled through a tubing, welded and drawn, the cable is made. The cable section is shown in the lower right figure. Because steel tubing is used as the sheath, the easily damaged surface is completely protected.
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