CN201209429Y - Wax removing and preventing device for electrical heated oil conduit - Google Patents

Abstract

The utility model provides a paraffin removal and control device for an electric heating oil tube, which is particularly suitable for an oil well with more paraffin. The paraffin removal and control device is composed of an oil tube 3, an outer tube 6 and a cable 8, wherein a plurality of groups of PTC electronic ceramic 1 are installed in an annular space between the oil tube 3 and the outer tube 6 at intervals, a heat conducting insulation layer 2, a heat insulated layer 4 and a heat shrinkage tube 5 are arranged outside the PTC electronic ceramic 1, the annular space between the outer tube 6 and the oil tube 3 is sealed by end covers 7 at both sides, and the end covers 7 are welded on the outer tube 6 and the oil tube 3. When the paraffin deposits in the tube, a power source is switched on, the heat generated by the PTC electronic ceramic 1 is transferred to the oil tube 3, and the raw oil which flows through the inner tube of the oil tube 3 is heated, in order to achieve the purposes of paraffin control, paraffin removal and viscosity reduction of raw oil. The utility model has the advantages that the structure is simple, secure and reliable, the heat efficiency is high, the service life is long, the installing operation is convenient and the operating cost is low.

Description

Electrical heating oil pipe wax removal wax-proofing apparatus

Relate to the field

The utility model provides a kind of electrical heating oil pipe wax removal wax-proofing apparatus, is specially adapted to the higher oil well of the content of wax.

Prior art

In the higher oil mining process of the content of wax, the tube inner wall wax deposition, if untimely wax removal gently then reduces crude output, seriously then can cause stopping up oil pipe, cause and stop well operations, glass fiber reinforced plastic oil pipe, coating tubing wax control and anti wax pipe paraffin control with inhibitor are mainly adopted in wax control measure in oil exploitation at present, and the wax removal measure mainly contains mechanical paraffin removal, heating power well-flushing wax removal, above-mentioned wax control, wax removal measure running cost height, the retention time weak point needs operation repeatedly behind the well-flushing wax removal.

Summary of the invention

The purpose of this utility model provides a kind of electrical heating oil pipe wax removal wax-proofing apparatus, can be by crude oil be heated, thus reach the purpose of viscosity reduction, wax control and wax removal.

The utility model is achieved in that it is made up of oil pipe, outer tube, cable, many group PTC electronic ceramics are housed in the annular space of oil pipe and outer tube at interval, the PTC electronic ceramics has heat conductive insulating layer, isolation layer, heat-shrink tube outward, annular space between outer tube and the oil pipe is by the end cap seal at two ends, on end cap welding outer tube and the oil pipe, the heat conductive insulating layer prevents electric leakage, isolation layer prevents that heat from outwards transmitting, heat-shrink tube tightly fixedly on the oil-pipe external wall, improves the efficiency of heating surface with PTC electronic ceramics, heat conductive insulating layer, isolation layer.During use, electric heating oil filling pipe wax-proofing apparatus string on tubing string, is lowered in the oil well, and simultaneously with the cable G.I.H to well head, join with power supply, when in the oil pipe during wax deposition, connect power supply, the PTC electronic ceramics produces the heat transferred oil pipe, and the crude oil of the tube inner wall of flowing through is heated.Thereby reach the purpose of wax control, wax removal, reduction viscosity of crude.

The utility model is simple in structure, and is safe and reliable, thermal efficiency height, and long service life, installation exercise is convenient, and running cost is low.

Description of drawings

Fig. 1 is the utility model structure principle chart

Fig. 2 is the utility model sectional drawing

1-PTC electronic ceramics, 2-heat conductive insulating layer, 3-oil pipe, 4-isolation layer,

5-heat-shrink tube, 6-outer tube, 7-end cap, 8---cable

The specific embodiment:

Below in conjunction with accompanying drawing this practicality is newly discussed in detail, the utility model is by oil pipe 3, outer tube 6, cable 8 is formed, many group PTC electronic ceramics 1 are housed in the annular space between oil pipe 3 and outer tube 6 at interval, heat conductive insulating layer 2 is arranged outside the PTC electronic ceramics 1, isolation layer 4, heat-shrink tube 5, annular space is by end cap 7 sealings at two ends between outer tube 6 and the oil pipe 3, on end cap 7 welding outer tubes 6 and the oil pipe 3, heat conductive insulating layer 2 prevents electric leakage, isolation layer 4 prevents that heat from outwards transmitting, heat-shrink tube 5 is with PTC electronic ceramics 1, heat conductive insulating layer 2, isolation layer 4 tightly fixedly on oil pipe 3 outer walls, improves the efficiency of heating surface.During use, with electrical heating oil pipe wax removal wax-proofing apparatus string on tubing string, be lowered in the oil well, and simultaneously with cable 8 G.I.Hs to well head, join with power supply, when in the oil pipe during wax deposition, connect power supply, PTC electronic ceramics 1 produces heat transferred oil pipe 3, the crude oil of oil pipe 3 inwalls of flowing through is heated, thereby reach the purpose of wax control, wax removal, reduction viscosity of crude.

Claims (1)

1, a kind of electrical heating oil pipe wax removal wax-proofing apparatus, form by oil pipe (3), outer tube (6), cable (8), it is characterized in that being equipped with at interval in the annular space between oil pipe (3) and the outer tube (6) many group PTC electronic ceramics (1), heat conductive insulating layer (2), isolation layer (4), heat-shrink tube (5) are arranged outside the PTC electronic ceramics (1), annular space between outer tube (6) and the oil pipe (3) is by end cap (7) sealing at two ends, on end cap (7) welding outer tube (6) and the oil pipe (3).