CN2106920U - Immersed booster water-filling electric pump - Google Patents

Abstract

The utility model relates to an immersed booster water-filling electric pump, belonging to the pump and submersible pump class. The key technology of high pressure dynamic seal is converted to high pressure static seal; namely, an electric submersible pump comprising a submersible pump, a protector and a submersible motor is completely sealed in a pocket well comprising a well pipe with a sealed bottom and a sealing device for a well mouth. Thus, high pressure water input to the pocket well can be supercharged to output water with required high pressure with the relatively supercharging and cascade methods. As an ideal tool for supercharging water injection in single well of an oil field, the pump with compact structure, small size, light weight, convenient installation and operation can be widely used for supercharging water injection in single well of large oil fields and for extracting warm groundwater and underground water in deep layers.

Description

Immersed booster water-filling electric pump

The utility model belongs to pump class, Submerged Motor Pumps.

The oil field develops crude oil and underground sewage in the overseas crude oil process simultaneously, and subsurface pressure constantly descends, and for keeping and improving crude output, makes full use of sewage, and it is underground to reinject sewage.Prior art generally adopts high pressure pumping plant and pipe network central water supply, will contain corrosive material, and temperature is forced into 15 MPas up to 70 ℃ with interior sewage and supplies with each water injection well, to underground flooding.Its deficiency is that because of the geological condition difference, the needed water injection pressure of each water injection well is not quite similar, so the water injection pressure of each water injection well is also along with variation, and many wells are annotated not go down to the hydraulic pressure of 15 MPa pressure.

The purpose of this utility model is to provide a kind of sinking pressurized water injection electric pump, can be with the sewage of 15 MPa pressure, and being pressurized to needs pressure, solves the single well pressure boost water filling, and need not improve the pressure of supply water of pumping plant and pipe network.

The technical solution of the utility model is the high pressure sealing key problem in technology; be converted into the high pressure static seal; be about to be sealed in fully the well casing of bottom lock by the Submerged Motor Pumps that submersible pump, protector, submersible motor are formed; among the pocket well that constitutes with well mouth sealing device, adopt relative supercharging, series connection method the high pressure water of input pocket well can be pressurized to desired high pressure output water.

Below in conjunction with accompanying drawing technical solution of the present invention is described further:

Accompanying drawing 1, sinking pressurized water injection electric pump structural representation;

Fig. 2, submersible pump structural representation;

Fig. 3, sinking protector structure schematic representation;

Fig. 4, submersible motor structural representation.

As shown in Figure 1, immersed booster water-filling electric pump is by check (non-return) valve 3, immersible pump 17, guarantor Protect device 19, submersible motor 22, form the submersible pump unit, be sealed in well casing 1 bottom lock, upper end thread connection wellhead flange 7, support cone 5, rubber wick 6, sieve and foretell a body 8, the wellhead assembly that cover plate 13 forms is with among the fastening pocket well of bolt and nut 14. Power supply and switch board 9, flat cable 20, usefulness cable cassette tape 16; protect line plate 2, be fixed on immersible pump, on the protector housing; connect with submersible motor with cable connector 21; motor lower portion dress centralizer 23; termination water-supply-pipe 4 on the check (non-return) valve; through well mouth sealing device, to stretch out the pocket well, connect Pressure gauge 10, outlet pipe 11, gate valve 12, well casing top tap into water pipe 15, protector and submersible motor outside dress kuppe 18 and form.

As shown in Figure 2, immersible pump 17 is vertical multi-stage segmented centrifugal pumps, by centrifugal impeller 29 by " Area Ratio " design, balance pipe is arranged on it, four flow channel type guide vanes 28, the one-level that forms pump, with tapered sleeve 34 impeller is fastened on the pump shaft 35, with the sealing of " O " RunddichtringO, consist of one section according to the lift difference by corresponding progression between every grade, link up with the connecting section 32 with bearing 31 between section and the section, between the water pump progression with flat lacing wire 30 and fastening nuts, on the pump shaft, the lower end has bearing 27 to support, and makes pump rotor be quick condition, pump shaft upper end dress lid, establish sand circle 33 above connecting section 32 bearings 31, lower termination shaft coupling 24, pump housing epimere 36 connect among check (non-return) valve 37(Fig. 1 3), lower end dress circle tube leaching net 26,25 compositions of water inlet joint. Impeller and stator are plain vane, and impeller, stator, sealing ring are selected nihard, and it is plumbous antimony bronze or Redford alloy that pump shaft, flat lacing wire, shaft coupling etc. all adopt stainless steel, bearing.

As shown in Figure 3; the precipitating type protector is made up of the two-stage precipitation chamber; protector axle 39 is equipped with angular contact ball bearing 41 from bottom to top; thrust disc 42, thrust bearing 43; protection tube 46, protective cap 48; the mechanical seal 49 that hard metals forms graphite, carbide alloy are all selected bellows-type to the mechanical seal 55 that carbide alloy forms. Relatively the protector axle from bottom to top, corresponding position has on lower contact 38, the lower contact body wall and compensating pipe 51, upper joint lower casing 45 is arranged, lower contact 47, bolt in dress fuel feeding valve 40, bolt-connection coupling head 44, the coupling head Connect fixed compensation pipe 51 on center tap 50 center taps, toward the upper outside shell 52 of upper joint, connecting section 54, be fixed with sediment tube 53 on it again, the top is pressed water strainer 56 and is formed again. This protector lower end connects the submersible motor axle; transferring power is given the diving pump shaft; and bear the part pump shaft to thrust; be full of lubricating oil in the chamber; feed liquor enters and enters first order mud chamber by sediment tube 53 in the protector, enters mud chamber, the second level by the sediment tube of compensating pipe 51, bottom, is precipitated into harmful wear particle indoor; the compensating pipe of bottom can be got rid of protector from fuel feeding valve 40 with wear particle, plays a protective role.

As shown in Figure 4, submersible motor is the oil-filled type structure, by motor shaft 63, rotor 62 on it adopts in the plow-shape groove and wears the plow-shape copper bar, and the two ends weldering is formed mouse cage with copper ring, stator 61 adopts the whole phase winding threading of plow-shape groove, select the wrapped circular copper wire of polyimide-fluorine 46 laminated films for use, insulated paint lacks solvent impregnated resin with F level low toxicity, and lead wire and joint all adopt F ₁Sealing tape is worn teflon sleeve outward, and the upper and lower end insulation sleeve is located at guide shaft bearing outside, and cable joining 21 adopts vulcanizable fluororubber, and vacuum tank is annotated epoxy resin plug-in type static seal plug.Stator punching is offered garden, two roads arc groove, circumferentially rotate with twice groove restriction stator punching on the motor casing 60 when repeatedly pressing, two ends respectively dispose a tooth support, motor casing adopts corrosion resistant plate to roll, two ends welding seamless steel pipe, be processed with screw thread and connect with the upper connection 65 that has several holes oil circuit, base 58 respectively, motor shaft two ends support with rolling bearing 59, thrust-bearing 64, and the base bottom is established oil discharge screw 57 and formed.

Sinking pressurized water injection electric pump; erection sequence is referring to Fig. 1; earlier wellhead flange 7 is tightened on the well casing 1; the steel flange dish that is not less than 50 millimeters with thickness is shut well head; inject 1.25 times of specified delivery pressure water; pressurize 5 minutes; do pressure test; the well casing connecting thread should be water-tight; unload the steel flange dish; submersible motor is loaded onto protector; descend to the well casing central seat on well head; cable joining is connected; and connection power supply; the inspection motor turns to; correct turning to is to overlook from the motor top; motor reel is for rotating counterclockwise; then cable and power connection are performed mark,, be docked on the protector joint with the clamping plate submersible pump of slinging; prize the pump shaft coupling downwards with screw-driver; twist firm Cock screw after making the M10 screw of coupling aim at protector spindle nose aperture, with bolt two flange plate are linked up, the rotating shaft rotation is brisk; can go into the well; clamping plate be stuck in put on the wellhead flange steady after, the peckled turnip body of wellhead assembly is connected on the pump, with the suspension ring unit of slinging; take off clamping plate; with suspension ring unit is all hung out in well,, propose synchronously with pump being placed in the well casing in advance and hanging over air guide sleeve on the wellhead flange; with three bolts centralizer is tightened on the base; air guide sleeve is placed on the centralizer stopping table, puts down unit then, stop when suitable for reading to air guide sleeve; continue to go into the well after sealing with rubber seal and screw, and cable is protected the line plate; what the cable cassette tape was firm is fixed on the unit.Position according to peckled turnip body sealing single core cable, three single core cables in the armouring flat cable are pressed in the semicircle hole of peckled turnip body and rubber wick, then loose-leaf is closed, continue pump down with the fastening back of loose-leaf pinning, wellhead assembly is seated in the wellhead flange hole, add the upper cover plate bolton, check that cable insulation can wiring after normal, at last inlet and outlet pipe, gate valve, pressure gauge venting bolt etc. are connected.

Start, turn round, shut down.At first check well head sealing situation before the startup, the choke-out of outlet pipe gate valve, open the water inlet gate valve, up to predetermined pressure, each sealing part does not allow percolating water, intake pressure progressively is pressurized to rating value, and gas in pit shaft and the pump is emitted, pressure testing is after 5 minutes, keeping under the former hydraulic pressure, check motor, insulating resistance of cable, each component such as control cabinet, the startup of can closing a floodgate after all are normal.Want standby current table, voltmeter, the every numerical value of pressure gauge when just starting, then slowly open the rising pipe gate valve, when gauge hand numerical value reaches rating value, stop to open gate valve, see that the fluctuation of each list index is not more than 5% and when not having other anomalies this moment again, then can drop into normal operation, after water filling reaches pre-provisioning request, close into water gate valve, cut off general power, close out Water gate valve, open the venting bolt, decompression.

The present invention has following advantage: motor is the phase asynchronous submersible motor of oil-filled type; ball bearing is adopted at two ends; bear radial and axial load; stator adopts thin-shell construction; motor shaft extension end adopts splined; it is convenient to make it to dock with protector, and the motor lighting outlet has partly adopted the inserting type structure, makes motor installation, easy-to-connect.The precipitating type protector separates well liquid and internal lubrication oil; realize the thermal expansion respiration that motor is lubricated by mud chamber's volume, and the inside and outside cavity pressure of balance is poor, the mechanical seal layout that scatter; improved assembling quality; improved the mechanical seal radiating condition, the impeller of submersible pump, stator are garden cylindricality blade, are convenient to make; adopt the equalizing orifice balancing axial thrust; reliable between pump stage with " O " RunddichtringO, sealing, carry out between pump stage with flat lacing wire fastening, easy accessibility.With tapered sleeve impeller is fixed tightly on the axle, is easy to control axial clearance, use the Cuprum alloy guide bearing, and add intermediate support raising pump shaft rigidity, the vertical multi-stage segmented garden tubular pump housing, segmentation tightens up pump stage, increases linking intensity, has guaranteed that pump shaft is to dimensionally stable.Air guide sleeve make water flow through from the pocket shaft bottom submersible motor, protector, by pump intake through the submersible pump supercharging, play the effect of cooling submersible motor protector simultaneously.

The Submerged Motor Pumps that submersible pump, protector, submersible motor are formed also can be used to extract temperature reaches 500 meters up to 75 ℃ of degree of depth geothermal water and underground water.If 25 meters of the discharge capacities of a glance hot well ³/ hour, 75 ℃ of water temperatures are reduced to 30 ℃ after the use, per hour the heat of Chan Shenging is 112.5 ten thousand kilocalories, is equivalent to the heat that two 6 tons of boilers produce, and this shows, utilize this Submerged Motor Pumps to propose the deep layer geothermal water, can make abundant geothermal resources benefit the people.

Sinking pressurized water injection electric pump, can solve the difficulty of single well pressure boost water filling, and need not improve the pressure of supply water of pumping plant and pipe network, this pump price is low, unit short, discharge capacity designs on demand, the investment of water injection well will be significantly reduced, save human and material resources, the economic purpose that reaches the water filling incremental oil production of energy simultaneously.This pump structure compactness, volume are little, in light weight, easy to install, and maintenance cost is low to be the desirable facility of oil field individual well pressurized water injection.

This sinking pressurized water injection electric pump can be widely used in each elephant single well pressure boost water filling, also can be used for extracting deep layer geothermal water and underground water.

Embodiment sees the following form listed

Claims (5)

1, sinking pressurized water injection electric pump is formed Submerged Motor Pumps by check valve 3, submersible pump 17, protector 19, submersible motor 22, it is characterized in that Submerged Motor Pumps is sealed in well casing 1 bottom lock fully, and the upper end connects among the pocket well of wellhead assembly formation.

2,, it is characterized in that described protector and submersible motor outside dress air guide sleeve 18 according to the described sinking pressurized water injection of claim 1 electric pump.

3, according to the described sinking pressurized water injection of claim 1 electric pump, it is characterized in that described submersible pump 17 is by the impeller 29 by " area ratio " design, equalizing orifice is arranged on it, four flow channel type guide vanes 28, the one-level of forming pump, with tapered sleeve 34 impeller is fastened on the pump shaft 35, with " O " RunddichtringO sealing, corresponding progression constitutes one section between every grade, section with section between hold 31 connecting section 32 with tape spool and link up, fastening between the water pump progression with flat lacing wire 30 and nut, on the pump shaft 35, the lower end has bearing 27 to support, and makes pump rotor be quick condition, is provided with the husky circle 33 of retaining above the connecting section bearing 31, pump housing lower end dress circle tube leaching net 26,25 compositions of water inlet joint.

4, according to the described submersible pump 17 of claim 3, it is characterized in that described impeller 29, stator 28 is plain vane, selects for use nickel cast iron to make.

5, according to the described sinking pressurized water injection of claim 1 electric pump; it is characterized in that described precipitating type protector 19 is made up of the two-stage precipitation chamber; the mechanical seal 49 that cemented carbide is formed graphite, bellow type is all selected in the mechanical seal 55 that cemented carbide is formed cemented carbide for use.

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