CN201065842Y

CN201065842Y - Electric submersible pump set for extremely small displacement well

Info

Publication number: CN201065842Y
Application number: CNU2007200953347U
Authority: CN
Inventors: 赵锡寰; 张瑞琪
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-02-16
Filing date: 2007-02-16
Publication date: 2008-05-28
Anticipated expiration: 2017-02-16

Abstract

The utility model relates to a super small displacement electric submerged pump set in water wells, comprising a motor unit and a pump head; wherein, the motor unit is arranged in a guide sleeve; the upper end of the guide sleeve is tightly connected with the pump head; the motor unit is connected at the lower end through a shaft extended from the lower end via a coupling; a pump group of a pump shaft is extended from the upper end; the shaft axes of the motor unit and the pump group are on the same straight line; an end thrust bearing is arranged at the lower end of the submerged pump set. The utility model has the advantages that an annular cavity for well liquid flow is arranged on the peripheral surface of the motor, so the flow velocity of well liquid on the peripheral surface of the motor can be controlled by adjusting the annular section size according to different displacement; high output pump pressure can eliminate blockage, thereby obtaining satisfactory heat dissipation conditions and materializing the proposal of super small displacement electric submerged pump set.

Description

Special float amount well is with electronic submersible pump unit

Technical field

The utility model belongs to well with electronic submersible pump unit, particularly relate to a kind of may command motor outer circumferential face the well flow velocity, can get rid of obstruction, make the special float amount well that reaches desirable radiating condition with electronic submersible pump unit.

Background technique

At present by the widely used a kind of machine in each oil field oily equipment of quarrying---the well of patterns such as centrifugal, axial flow is with electronic submersible pump unit, and have following shortcoming: it is not suitable for being lower than 50 meters oil wells of 3/ day at fluid supply capacity and uses.

The oil well that fluid supply capacity is lower accounts for the world and has developed the ratio of oil well more than 80%; People's machine is adopted the low oil reservoir of fluid supply capacity, can only continue to use traditional sucker rod pumping pumping unit, and it is low that these equipment generally have efficient, the waste electric energy is not suitable for inclined shaft, is not suitable for high-lift well, the ground installation bulky complex, the maintenance management difficulty is big, the more high shortcoming of operating cost.Use suspending type electric oil submerged screw pump unit instead, its acquisition expenses is too high.The well of patterns such as the imagination employing is centrifugal, axial flow can obtain to invest benefits such as little, that efficient is high, saving power, is fit to various inclined shafts, is fit to various lifts, and the ground installation volume is little, and simple, and is easy to maintenance, and operating cost is lower with electronic submersible pump unit; But because its motor unit is arranged under the pump group, when special hour of discharge capacity, well liquid was low excessively at the flow velocity of motor unit outer circumferential face; Cover can improve flow velocity with the water conservancy diversion cover, but the suction lift of pump group input end is too little, is difficult to overcome the obstruction disadvantage, causes the radiating condition of its auxiliary motor poor; Become insoluble problem.

Summary of the invention

The utility model provides a kind of suitable fluid supply capacity low oil well for solving the technical problem that exists in the known technology, the well flow velocity of may command motor outer circumferential face, can get rid of obstruction, the special float amount well that makes the radiating condition that reaches desirable is with electronic submersible pump unit.

The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is:

The special float amount of the utility model well comprises: be contained in the motor unit in the water conservancy diversion cover with electronic submersible pump unit; The close-connected head in water conservancy diversion set upper side; The arbor that its motor unit is stretched out by the lower end is connecting by coupling and is being arranged at its lower end, and stretches out the pump group of pump shaft from the upper end; The shaft axis of motor unit and pump group is on same straight line; Be provided with thrust bearing in the lower end of submersible pump unit in addition.

The utility model can also adopt following technical measures:

The pump group be centrifugal or pump shaft such as axial flow and pump case in the submergence type pump group in same axle center.

Advantage and the good effect that the utlity model has are:

Rationally be provided with toroidal cavity at the motor outer circumferential face, the pump group is arranged on the lower end of motor unit, and the well liquid of unit output this toroidal cavity of must flowing through according to different displacements, is adjusted the width size of its circular crosssection, the well flow velocity of may command motor outer circumferential face; And very high output pump pressure can get rid of obstruction, obtains satisfied radiating condition thereby motor unit in the utility model is in operation, and main is that special float amount well is become a reality with the imagination of electronic submersible pump unit.

Description of drawings:

Fig. 1 is the vertical profile structural representation of the special float amount of the utility model well with electronic submersible pump unit.

The number in the figure explanation:

01: oil pipe 02: cable joining

10: head 11: liquid outlet opening

12: fairlead 20: the water conservancy diversion cover

30: motor unit 31: lead-in wire

32: casing 33: arbor

34: coupling 40: toroidal cavity

50: pump group 51: liquid entering hole

52: pump case 53: pump shaft

54: thrust bearing

Embodiment:

Followingly the utility model is described in detail with reference to drawings and Examples.

The special float amount of the utility model well is with electronic submersible pump unit, and as shown in Figure 1, special float amount well comprises: be contained in water conservancy diversion and overlap 20 interior motor unit 30 with electronic submersible pump unit; The close-connected head 10 in water conservancy diversion set upper side; The arbor 33 that its motor unit is stretched out by the lower end is connecting by coupling 34 and is being arranged at its lower end, and stretches out the pump group 50 of pump shaft 53 from the upper end; The shaft axis of motor unit and pump group is on same straight line; Be provided with thrust bearing 54 in the lower end of submersible pump unit in addition.

The motor unit upper end closely is connected with the head lower end; The outer circumferential face of motor unit and water conservancy diversion cover inwall are formed with toroidal cavity 40.

Motor unit is arranged in the water conservancy diversion cover, and the upper end of its casing 32 closely is connected with the head lower end, and it goes between and 31 draws from the upper end, closely connects conduction by fairlead and cable joining 02.Its arbor stretches out by coupling from the lower end and is connected with pump shaft.

Water conservancy diversion overlaps cylindrical shape, and its upper end portion closely is connected with the lower end of head, and its underpart closely is connected with pump case 52 upper ends.

Head is arranged on special float amount well with electronic submersible pump unit upper end portion, and its inside is formed with liquid outlet opening 11 and fairlead 12, and liquid outlet opening and fairlead are isolated and up/down perforation head respectively mutually; The connection that is connected with the lower end of oil pipe 01 of the upper end of liquid outlet opening, its lower end is connected with toroidal cavity.

The pump case upper end portion of pump group closely is connected with water conservancy diversion cover underpart, and the pump case underpart is provided with liquid entering hole 51, and pump case inner chamber upper end is connected with the toroidal cavity lower end; Its pump shaft stretches out with coupling from the upper end and is connected.

Be provided with thrust bearing 54 in the lower end of submersible pump unit in addition.

The pump group is pump shafts such as centrifugal, axial flow and the pump case submergence type pump group in same axle center.

Below the working procedure of the special float amount of the utility model well with electronic submersible pump unit described:

When adopting the special float amount of the utility model well with electronic submersible pump unit, ground power supply is passed through to go between with electrical energy transfer to after the motor unit by cable joining, arbor drives the pump shaft running by coupling, well liquid is sucked and lifting from liquid entering hole, the well-designed toroidal cavity of well liquid process is with desirable flow velocity, the heat that produces when motor unit is moved is in time taken away, and makes motor unit obtain desirable radiating condition, through liquid outlet opening and oil pipe well liquid is lifted to ground again.

At the thrust bearing that the lower end of submersible pump unit is provided with, can bear the axial force that pump shaft produces.

Claims

1. a special float amount well comprises: be contained in the motor unit in the water conservancy diversion cover with electronic submersible pump unit; The close-connected head in water conservancy diversion set upper side; It is characterized in that arbor (33) that motor unit (30) is stretched out by the lower end is connecting by coupling (34) is arranged at its lower end, and stretches out the pump group (50) of pump shaft (53) from the upper end; The shaft axis of motor unit and pump group is on same straight line; Be provided with thrust bearing (54) in addition in the lower end of submersible pump unit.

2. special float amount well according to claim 1 is with electronic submersible pump unit, it is characterized in that the pump group be centrifugal or pump shaft such as axial flow and pump case in the submergence type pump group in same axle center.