CN2663653Y

CN2663653Y - Heating system device under oil-submersible electric pump and well pump

Info

Publication number: CN2663653Y
Application number: CN 200320105555
Authority: CN
Inventors: 谷峰; 裴庆武; 王云松
Original assignee: Liaoning Huafu Petroleum High Tech Co ltd
Current assignee: Liaoning Huafu Petroleum High Tech Co ltd
Priority date: 2003-11-22
Filing date: 2003-11-22
Publication date: 2004-12-15
Anticipated expiration: 2013-11-22

Abstract

A heating system device under oil-submersible electric pump and well pump is used to heat the dense oil form under pump under conditions of oil extraction in non-oil extractor for oil extraction oil-submersible electric pump, the technical proposal of the device is that a power electricity of 380 V is used as a power source of the device, transformed into single phase power through commutation and input into the well through a ground power source and a control system by a steel tube protector cable. The steel tube protector cable crosses through the gap between a pump and a sleeve from the underground oil ring space and connected with a heater electrically under the pump, thereby heating the dense oil. Furthermore, the steel tube protector cable can heat and reduce the stick degree of the crude oil in the lift process according to the skin collection effect principle in upper part of the oil-submersible pump, thereby having fluidity in lift process and solving the technical problem of smooth access into the pump through heating the dense oil in well pump by the oil-submersible electric pump such as electric submersible pump and screw pump. The utility model can be used for oil extraction by the non-oil extractor and heating the dense oil by the oil-submersible electric pump.

Description

Heating system device under the submersible electric pump well pump

Technical field:

The utility model relates to a kind of oil exploitation submerged electric oil pump well at " the heating system device under the submersible electric pump well pump " that under the condition of work of non-pumping production viscous crude carried out heating usefulness under the pump.

Background technology:

Present domestic thickened oil recovery is adopted usually and is injected hot water, steam, injects chemical agent, makes it in technology such as the living heat of down-hole reaction, with viscous crude when wellbore bottom gives rise to ground, be to adopt technical measures such as electrical heating or electromagnetism heating, electric heater unit uses more ribbon heater, downhole cable etc.To general thickened oil recovery widespread usage is the hollow rod electric-heating technology.Hollow rod is got over the electric-heating technology that the pump oil recovery technique has solved special viscous crude, super viscous crude, the lifting of high-solidifiability oil well tube.Above-mentioned pump oil recovery technique more and equipment thereof all are used for rod-pumped well, it is characterized in that adopting the oil extraction pump of hollow rod and hollow, be that cable self-pumping center is crossing under the pump, when not having hollow, cable can't descend under the pump when oil extraction pump (electric submersible pump, screw pump etc.).

The utility model content:

In order to overcome oil extraction pump in the prior art (electric submersible pump, screw pump etc.) when not having hollow, cable can't descend the deficiency under the pump, the utility model provides a kind of " heating system device under the submersible electric pump well pump ", this device solves oil extraction pump (electric submersible pump, screw pump etc.) when heavy crude producing, the heating viscous crude makes its technical problem of going into pump smoothly under pump, and is good through trial effect.

The technical scheme that its technical problem that solves the utility model adopts is: this device is by ground power supply and control system, to submersible electric pump, heater constitutes " heating system device under the submersible electric pump well pump " to steel pipe sheath oil well private cable under the connection pump from well head.It is that power electricity with 380V is the device power supply, become single-phase electricity by rectifier transformer, be entered into the down-hole by oil well special steel pipe jacketed cable, the steel pipe jacketed cable passes from pump and shell clearance at downhole oil cover annular space, is electrically connected under the pump on the heater.Ground power supply system is made up of variable frequency control cabinet, power transmission cable, anti-explosion terminal box and accessory, is the three-phase input of adopting 380V, through frequency converter rectification, inversion, by the transformer single-phase output in back of boosting, to down-hole heating system transmission power.The steel pipe jacketed cable is to be fixed on oil-line pump hanging tube post outside with the duplex protector in pit shaft, upwards pass through the packing hanger and draw well head, in the gap of submersible electric pump and sleeve pipe, pass downwards and be connected to heater under the pump, the cable that the steel pipe jacketed cable can be selected various cross sectional shapes and insulation materials for use according to the situation and the working condition needs of well; Another effect in pit shaft of steel pipe jacketed cable is with kelvin effect the viscous crude in the lifting to be heated in order to keep the flowability of viscous crude.Heater is to be made of one or more heating units under the pump, and heating unit is made up of screen casing, collecting current type centralizer, locating support, heating, High-Voltage Insulation sealing power connection.When using it, can be equipped with heating unit, can select one or more heating units for use, be installed in oil-line pump hanging tube post lower end according to the allocation of well rates needs.

The beneficial effects of the utility model are, not only to viscous crude heating viscosity reduction under the pump, the steel pipe jacketed cable also can play the sticking effect of companion's heat drop to the viscous crude in the pit shaft lifting to this device simultaneously, and the oil exploitation that is applied in heavy oil wells is effective, be particularly useful for the offshore platform thickened oil recovery, economic benefit is better.

Description of drawings:

Fig. 1 is the utility model overall structure schematic diagram.

Fig. 2 is a heating unit structural representation in the heater under the pump.

Among the figure 1, the variable frequency control cabinet, 2, power transmission cable, 3, anti-explosion terminal box and accessory; 4, packing hanger, 5, the duplex protector, 6, the steel pipe jacketed cable; 7, submersible electric pump; 8, sleeve pipe, 9, heater under the pump, 9.1, screen casing; 9.2, the collecting current type centralizer; 9.3, locating support, 9.4, heating, 9.5, the High-Voltage Insulation seal nipple.

The specific embodiment:

In Fig. 1, with 380V power electricity is the device power supply, becomes single-phase electricity by rectifier transformer, is entered into the down-hole by steel pipe jacketed cable 6 again, steel pipe jacketed cable 6 passes from pump and sleeve pipe 8 gaps at downhole oil cover annular space, is electrically connected under the pump on the heater 9.Ground power supply system is electrically connected by variable frequency control cabinet 1, power transmission cable 2, anti-explosion terminal box and accessory 3 to be formed.Be the three-phase input of adopting 380V, through frequency converter rectification, inversion, by the transformer single-phase output in back of boosting, to down-hole heating system transmission power.Steel pipe jacketed cable 6 is to be fixed on oil-line pump hanging tube post outside with duplex protector 5 in pit shaft; upwards pass through packing hanger 4 and draw well head; in the gap of submersible electric pump 7 and sleeve pipe 8, pass downwards and be electrically connected under the pump on the heater 9; the cable that steel pipe jacketed cable 6 can be selected various cross sections, shape and insulation materials for use according to the situation and the working condition needs of well, another effect in pit shaft of this cable are with kelvin effect the viscous crude in the lifting to be heated in order to keep the flowability of viscous crude.Heater 9 is to be made of one or more heating units under the pump.

In Fig. 2, the heating unit under the pump in the heater 9 is made up of screen casing 9.1, collecting current type centralizer 9.2, locating support 9.3, heating 9.4, High-Voltage Insulation seal nipple 9.5; It is enclosed within the outside of screen casing 9.1 by adopting collecting current type centralizer 9.2, locating support 9.3 is fixed on the screen casing 9.1, again heating 9.4 is coated on the outside of screen casing 9.1, then High-Voltage Insulation is sealed power connection 9.5 and be welded to connect with steel pipe jacketed cable (6).

Claims

1, heating system device under a kind of submersible electric pump well pump, it is characterized in that: be the power supply of this device with 380V power electricity, become single-phase electricity by rectifier transformer, from pump and sleeve pipe (8) gap, pass at downhole oil cover annular space by steel pipe jacketed cable (6) again, be electrically connected on the heater under the pump (9); Ground power supply system is electrically connected by variable frequency control cabinet (1), power transmission cable (2), anti-explosion terminal box and accessory (3) to be formed; Steel pipe jacketed cable (6) is to be fixed on oil-line pump hanging tube post outside with duplex protector (5) in pit shaft, upwards pass through packing hanger (4) and draw well head, in the gap of submersible electric pump (7) and sleeve pipe (8), pass downwards and be electrically connected on the heater under the pump (9); Heater under the pump (9) is to be made of one or more heating units.

2, heating system device under the submersible electric pump well pump according to claim 1, it is characterized in that: the heating unit in the heater under the pump (9), be by collecting current type centralizer (9.2), be enclosed within the outside of screen casing (9.1), locating support (9.3) is fixed on the screen casing (9.1), again heating (9.4) is coated on the outside of screen casing (9.1), then High-Voltage Insulation is sealed power connection (9.5) and be welded to connect with steel pipe jacketed cable (6).