CN200949449Y

CN200949449Y - Deep-well heater of oil field

Info

Publication number: CN200949449Y
Application number: CN 200620029271
Authority: CN
Inventors: 王琮泽; 张惜光; 陈安民
Original assignee: BAISHAN CITY ZHONGBANG AUTOMOBILE ELECTRON Co Ltd
Current assignee: BAISHAN CITY ZHONGBANG AUTOMOBILE ELECTRON Co Ltd
Priority date: 2006-09-01
Filing date: 2006-09-01
Publication date: 2007-09-19
Anticipated expiration: 2016-09-01

Abstract

The utility model relates to an oil tool class used for oilfield, specifically is a deep well heater for oilfield. The utility model consists of an electrical control cabinet and a heating head. The electrical control cabinet is connected with the heating head through a power cable and signal lines. The heating head is inner and outer heat conduction steel pipes sleeved together, two ends of the inner and the outer heat conduction steel pipes are connected with the top joint and base joint connected with the oil pipe, between the inner heat conduction steel pipes and the outer heat conduction steel pipes are provided with electromagnetic wire for heating. The electrical control cabinet is disposed on the wellhead ground, the heating head is mounted to the downhole oil reservoir with the pumping pipe, and the remote automatic control is realized. The utility model is characterized of reliable heat dissipation and high heat efficiency, reducing crude oil viscosity, avoiding the wax deposition within the oil pipe and improving oil recovery factor, as well as increasing yield.

Description

The oil field deep well heater

Technical field

The utility model relates to the petroleum tool class of using in a kind of oil field, specifically is the oil field deep well heater.

Background technology

In prior art, for the height in oil field coagulate oil, its recovery ratio of high waxy oil is lower, also therefore class oil hang attached tube inner wall and influence fuel-displaced, the effective tool of head it off never for a long time.

The utility model content

The purpose of this utility model is that a kind of oil field deep well heater that reduces oil viscosity in oil pumping process is provided at above-mentioned deficiency.

Technical solution of the present utility model is: the oil field deep well heater is made up of electrical control cabinet and heating head two parts.Be connected with holding wire by power cable between electrical control cabinet and the heating head.Described heating head is the inside and outside heat conduction steel pipe that is nested together, and inside and outside heat conduction steel pipe two ends are connected with top connection and the lower contact that is connected with oil pipe, are fixed with the electromagnetic wire of heating between the inside and outside heat conduction steel pipe.Electrical control cabinet is arranged on well head ground, and heating head is realized remote auto control with arriving the down-hole oil reservoir under the oil pick-up tube.Before the oil pumping, the energising heating, along with the heat radiation of heating head outer tube, the rising of oil liquid temperature on every side forms bigger thermal field gradually around the heating head, the oil viscosity of hot on-site reduces, flowability improves, and flow resistance reduces, and forms tendentiousness and converges long-pending, accelerated to have improved liquid supply rate in the long-pending speed of the remittance in shaft bottom.When oil pump is pumped, fluid is by being in control further heating in the heating head, along with fluid flowing in oil pipe, the fluid heat that sheds has heated oil pick-up tube and made temperature rising pit shaft in, when oil liquid temperature is higher than the agglomerated temperature of the brilliant particulate of wax, just eliminates and alleviate the wax deposition degree.

The utility model has the advantages that: 1, adopt internal and external casing heating head structure, realization is once heated the crude oil around the oil pipe and to the crude oil reheat by extracting out in the oil pipe, reduced the viscosity of crude oil effectively, avoided wax deposition in the oil pipe, raising oil recovery factor, raising output have been had positive effect.2, adopt electromagnetic wire as heating element, safe in utilization, heat radiation is reliable, thermal efficiency height.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Description of drawings

Fig. 1 is the utility model scheme of installation;

Fig. 2 is the heating head structure diagram.

The specific embodiment

Referring to Fig. 1, the oil field deep well heater is made up of electrical control cabinet 1 and heating head 2 two parts.Be connected with holding wire by power cable 3 between electrical control cabinet 1 and the heating head 2.Heating head 2 be connected oil pick-up tube 9 low sides or between.

Referring to Fig. 2, heating head 2 is formed for the interior heat conduction steel pipe 4 that is nested together, outer heat conduction steel pipe 5, and inside and outside heat

conduction steel pipe

4,5 two ends are connected with top connection 6 and the lower contact 7 that is connected with oil pipe 9, are fixed with the electromagnetic wire 8 of heating between the inside and outside heat

conduction steel pipe

6,7.

Control System of Microcomputer is provided with the constant temperature current limliting and controls function and design temperature upper and lower limit auto-power-cutting automatically and timing automaticly stop sending three kinds of modes of electricity to select use for the user, can have additional functions such as automatic analysis, metering, record, printing by customer requirements simultaneously.

Heating head 2 is also with a plurality of temperature-sensitive elements, by holding wire the bottom hole temperature (BHT) signal is passed to control system, control system is according to the operating current of bottom hole temperature (BHT) control heating head 2, and temperature signal is the average of a plurality of temperature-sensitive elements, when a temperature-sensitive element damages, then be the average of other temperature-sensitive element, quite accurate, be controlled in certain scope so the temperature of heating head 2 can be artificial.Electromagnetic wire 8 is sealed between the inside and outside heat

conduction steel pipe

6,7, and heating head 2 outer heat conduction steel pipes 7 can withstand voltage 30Mpa.Heating head 2 can be in the medium-term and long-term work of 160 ℃ of environment.For making the work steady in a long-term of heating head 2 energy, the temperature capacity of cable 3 and holding wire all should match,

During installation, heating head 2 is along with oil pick-up tube 9 is sent to the shaft bottom oil reservoir, start-up control cabinet 1, temperature-sensitive element is transferred to the control system computer with the temperature in shaft bottom, computer is led the size that output current is determined at the angle by the silicon controlled of the heating curve control three-phase half controlled bridge formula rectification of setting, along with the rising of oil liquid temperature around the heating head 2, temperature-sensitive element is transferred to computer with the variations in temperature signal through control signal wire, and computer will be controlled the duty of major loop according to the working forms of setting.

Main frame has three kinds of working methods to select to use for the user: one is the constant temperature current limliting: be according to customer requirements and set an oil temperature higher limit, as above be limited to 115 ℃, set oily temperature lower limit as 95 ℃, when oily temperature reaches higher limit, temperature-sensitive element is transferred to computer with temperature signal, computer will be controlled controllable silicon and make output current reduce to certain value and heating head 2 temperature are not being risen, and gradual slow descends, when oily temperature drops to lower limit, computer changes the oil temperature signal of receiving into control signal, make output current increase to rated value, and the heating head temperature is risen, repeat said process when rising to higher limit.Two for setting the bound temperature value.In limited time, autostop, output current are zero, when dropping to lower limit, send electricity automatically in the arrival, and output current is a rated value, continues to heat.Three is the timing automatic electricity heating that stops sending.The user can be according to the production needs of oneself, by 24 hours formulation auto-power-cutting times of this device computer setting.

When oil well depth surpasses 1100 meters, can set up heating head 2 in the oil well appropriate depth, being reduced to soon to temperature, the high waxy oil and the rapid height that increases of viscosity of wax deposition temperature coagulate the oily reheat of carrying out, because the raising of oil pick-up tube 9 inner fluid temperature, viscosity reduces, fluid flow resistance in oil pipe 9 reduces, and flow velocity increases, thereby reaches the purpose that energy-saving and production-increase is put forward effect.

Install: before going into the well heating head 2 is carried out last detection, can go into the well after all are normal, heating head 2 is sent into the down-hole together and is treated producing horizon bottom along with oil pick-up tube 9, heating head 2 is foremost, tail end connects with oil pump by 2-5 root oil pick-up tube 9, when reaching 1100 meters need reheat as well depth, the reheat head will be connected on the oil pick-up tube 9 of appropriate depth.Cable 3 depends on the oil pick-up tube 9 and handles with adhesive tape is fixing, stamps clamp one every 50mm near cable 3 joints, and every side connects makes a call to three roads, and all the other every pipe is advisable with Da Sandao, and cable firmly is bundled on the oil pipe 9.Going into the well installs, and measures its insulaion resistance, meets the requirements, and just can be connected with electrical control cabinet 1.Electrical control cabinet 1 to be arranged on water logging less than the place, reliable ground connection is arranged, after sending electricity, heating head 2 reaches the heating-up temperature of setting very soon, form effective thermal field district in order to allow in the pit shaft liquid have enough heats to store, according to downhole condition, allow equipment work under the heating-up temperature of setting be no less than 12 hours after, turn on pump rises and takes out again, and later well head hypervisor routinely carries out.

Claims

1, a kind of oil field deep well heater is characterized in that being made up of electrical control cabinet (1) and heating head (2) two parts; Be connected with holding wire by power cable (3) between electrical control cabinet (1) and the heating head (2); The inside and outside heat conduction steel pipe (4,5) of described heating head (2) for being nested together, inside and outside heat conduction steel pipe (4,5) two ends are connected with top connection (6) and the lower contact (7) that is connected with oil pipe (9), are fixed with the electromagnetic wire (8) of heating between the inside and outside heat conduction steel pipe (4,5).