SU576393A1

SU576393A1 - Electric heater

Info

Publication number: SU576393A1
Application number: SU7301900712A
Authority: SU
Inventors: Альберт Николаевич Авельев; Александр Карапетович Аракелян; Альберт Константинович Мартыничев; Лидия Павловна Мартыничева
Original assignee: Чувашский государственный университет им.И.Н.Ульянова
Priority date: 1973-03-28
Filing date: 1973-03-28
Publication date: 1977-10-15

Description

1one

Изобретение относитс к нефтедобывающей промышленности и может быть использовано дл прогрева призабойной зоны глубинных нефт ных скважин.The invention relates to the oil industry and can be used to warm up the bottomhole zone of deep oil wells.

Известен электрический нагреватель дл нагрева нефт ных скважин, содержащий коаксиально расположенные электроды, выполненные в виде набора колец равного диаметра. К электродам подводитс посто нное напр жение и за счет электрохимических ироцессов ири протекании тока через провод щую жидкость между электродами выдел етс тепло дл нагрева окружающей ереды 1.An electric heater is known for heating oil wells, containing coaxially arranged electrodes made in the form of a set of rings of equal diameter. A constant voltage is applied to the electrodes and, due to the electrochemical processes, a current flows through the conductive fluid between the electrodes to heat the surrounding circuit 1.

Недостаток известного иагревател состоит в том, что интенсивность тепловыделени (а иногда и работосиособность нагревател ) существенно зависит от электроироводности жидкости, окружающей нагреватель.A disadvantage of the known heater is that the intensity of heat release (and sometimes the heater's working ability) significantly depends on the electrical conduction of the fluid surrounding the heater.

Извеетен также электрический нагреватель, содержаи;ий герметически закрытый корпус, частично заполненный водой, и электроды, изолированные друг от друга 2.An electric heater is also known, containing a hermetically sealed enclosure, partially filled with water, and electrodes insulated from each other 2.

Ирн использовании известного электрического нагревател дл обогрева призабойной зоиы глубипных нефт ных скважин нагреватель работает при высоком давлении окружающей среды (150-200 атм); иоэтому корпус пагревател делают толстостенным, вследствие чего увеличиваетс вес нагревател и снижаетс его теплоотдача.Irn uses a well-known electric heater to heat a bottomhole zone of deep oil wells; the heater operates at high ambient pressure (150-200 atm); Therefore, the superheater body is made thick-walled, as a result of which the weight of the heater increases and its heat transfer is reduced.

Целью изобретеии вл етс новыщение надежности работы нагревател и обеспечение регулировани темиературы. Это достигаетс путем установки в корпусе нагревател сильфона , св занного с регул тором мощности.The aim of the invention is to increase the reliability of the heater and ensure the regulation of temperature. This is achieved by installing a bellows in the heater body associated with a power regulator.

На чертеже показан предлагаемый электрический нагреватель.The drawing shows the proposed electric heater.

Claims

In case 1, completely filled with electrolyte 2, three electrodes 3 are placed (two are shown in the drawing) and bellows 4, which is a part of the body. On the housing there are lead-through insulators of electrodes 5 and sensor 6 displaced, associated with the bellows of the movable pull and forming with it the controller of the transducer. The sensor 6 can be rotated about the axis 7. The housing 8 provides a mechanical connection to the heater with the cable 9 and protects the cable core from damage. The casing is not hermetic, the space under it is communicated with the external medium. A multi-wire cable is used to apply voltage: three phases are connected to three heater electrodes, and two wires (or one wire and steel cable sheath) are used to connect a power regulator to sensor 6. The electric heater works as follows. At pressures surrounding the fluid heater, this pressure is transmitted through the bellows to the electrolyte, and therefore the pressure inside the heater casing is equal to the external pressure. When current flows through the electrolyte, the latter heats up and expands, which results in compression of the bellows and movement of the associated sensor, which supplies a signal to the power regulator that maintains the required electrolyte temperature. The heater can be made thin-walled and light, there are no general requirements for the seals, since there is no pressure difference outside and inside the heater, and the presence of high pressure inside the heater allows to increase the boiling point and, consequently, the temperature on the heater surface. For example, when the height of the liquid column in the well is 1800 m, the boiling point is 340 ° C. Claims of the Invention An electric heater for heating the bottomhole zone of an oil squall, comprising a housing filled with electrolyte, electrodes placed in the housing, and a power controller, characterized in that, in order to increase the reliability of the heater and to provide temperature control, a bellows is installed in the housing which is associated with a power controller. Sources of information taken into account in case of ekertise 1. Author's certificate No. 381736, cl. E 21B 43/24, 1970.

2. Certificate of author No. 122113, cl. E 21B 43/24, 1958.