CN201212466Y

CN201212466Y - Oil-submersible and oil production pump driven by DC step permanent magnet linear electric motor

Info

Publication number: CN201212466Y
Application number: CNU2007200135911U
Authority: CN
Inventors: 张洪新; 夏德权
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-27
Filing date: 2007-07-27
Publication date: 2009-03-25
Anticipated expiration: 2017-07-27

Abstract

The utility model relates to a submersible oil production pump driven by a direct-current stepping permanent magnet linear motor, which is composed of a cable (1), a motor stator (2), a motor mover (3), a variable diameter sheath (4), a pump cylinder (5), a plunger (6) and a ball valve set (7). The upper end and the lower end of the cable (1) are respectively connected with a ground control cabinet (8) and a coil in the motor stator (2), the upper end and the lower end of the motor stator (2) are respectively connected with an oil pipe (9) and the variable diameter sheath (4) by threads, the lower end of the variable diameter sheath (4) is connected with the pump cylinder (5) by the threads, the motor stator (2) and the pump cylinder (5) are respectively internally provided with the motor mover (3), the plunger (6) and the ball valve set (7), and the lower end of the motor mover is connected with the upper end of the plunger (6). The oil production pump has novel structure, banishes a ground pumping unit and a pumping rod of thousand meters, can avoid the eccentric wear of the pumping rod and lower the operation cost; and compared with the prior centrifugal electric submersible pump, the utility model has the advantages of low energy consumption and failure rate, long service life, and the like.

Description

The oil-submersible extracting pump that DC stepping permanent magnetism straight line motor drives

Technical field

The utility model relates to a kind of submersible electric pump that is used for the oilfield exploitation, belongs to the oil recovery machiner equipment class.

Background technique

For a long time, the oil exploration equipment of oil field field by using is all based on slide beam or chain type oil pump and downhole pump.This kind extracting device of oil technology maturation, rate of fault is lower, durable in use, but need install huge pumping unit on the ground, and need to use the sucker rod of going up km, and system effectiveness is low, the energy consumption height, also sucker rod partial wear can take place for inclined shaft especially, cause sucker rod to damage disconnected accident such as take off, the underground work workload is bigger.At present, the electric submersible pump that part oil district adopts mainly is made up of the centrifugal pump that cable, oil-submersible motor and multi-stage impeller constitute, this kind electric pump lift is low, is fit to shallow well and the bigger oil well of output, also has shortcomings such as electric efficiency is low, electric pump life-span weak point, rate of fault height simultaneously.In addition, though polytype down-hole linear motor occurred in the existing electric submersible pump exploitation technology, mostly be the alternating current impression synchronous machine, must reduce power supply frequency during use, and power be lower, thrust is little, is not suitable for the requirement of deep-well oil-extraction.

The model utility content:

The oil-submersible extracting pump that the purpose of this utility model is to provide a kind of simple in structure, energy consumption and rate of fault is lower, efficient is higher DC stepping permanent magnetism straight line motor to drive.

The technical solution of the utility model is as follows.This kind electric submersible pump is made up of cable, motor stator, electric mover, reducing sheath, pump barrel, plunger, ball valve group, the cable upper and lower end is connected with coil in the motor stator with the ground control cabinet respectively, the motor stator upper and lower end is connected with the motor sheath with oil pipe with screw thread respectively, reducing sheath lower end is connected with pump barrel with screw thread, be respectively equipped with electric mover and plunger, ball valve group in motor stator, the pump barrel, the electric mover lower end is connected with the plunger upper end.During work, the electric current that ground control cabinet power supply is supplied with is given down-hole linear motor by cable transmission, and behind the coil electricity, the electric current flowing through coil produces magnetic field in the carbon steel mover, the permanent magnetic field that produces with magnets of stator forms the interaction of suction and thrust, mover is advanced or retreats; Pump at the plunger pump that is connected under the drive of electric mover below the motor, crude oil sucks pump barrel under the switch motion of the effect of plunger pump and ball valve group, and the oil pipe extraction by tubular linear electric motor inner chamber and its top is to ground.

This new structure novelty has been abandoned complex structure, bulky ground pumping unit and the sucker rod of last km, and can have been avoided sucker rod partial wear, reduces operating cost; Compare with existing centrifugal electric submersible pump, then, have advantages such as energy consumption and rate of fault are low, long service life because direct current generator adopts pulse direct current to drive.

Description of drawings

Fig. 1 is a general structure schematic representation of the present utility model;

Fig. 2 is the structural representation of DC stepping permanent magnetism straight line motor;

Fig. 3 is extraordinary linear bearing structural representation.

Embodiment

Below in conjunction with accompanying drawing enforcement of the present utility model is described further.

As shown in Figure 1, the utility model is by cable 1, motor stator 2, electric mover 3, reducing sheath 4, pump barrel 5, plunger 6, ball valve group 7 is formed, its structure assembled relation is as follows: on the cable 1, the lower end is connected with coil in the motor stator 2 with ground control cabinet 8 respectively, on the motor stator 2, the lower end is connected with reducing sheath 4 with oil pipe 9 with screw thread respectively, reducing sheath 4 lower ends are connected with pump barrel 5 with screw thread, motor stator 2, be respectively equipped with electric mover 3 and plunger 6 in the pump barrel 5, ball valve group 7, the electric mover lower end is connected with plunger 6 upper ends, wherein, motor stator 2 (see figure 2)s are by special linear bearing 10, no magnetic urceolus 11, iron core 12, permanent magnet 13, coil 14 is formed.Stator coil 14 overcoats one silicon steel plate of motor is divided into two groups of A, B, and alternate intervals is installed.Be connected with permanent magnet 13 between the stator iron core 12 of adjacent windings A, B, adjacent stators iron core 12 magnetic poles are opposite, and permanent magnet 13 is an axial charging, form many group permanent magnetic circuits.Two groups of coils of A, B respectively connect two lines of cable, and a public zero line adopts DC electrical source grouping power supply, by the pulse change of different coil power supplies being controlled the rising or the down maneuver of mover cylinder.When motor A group coil added the forward dc electricity, the magnetic field of the coil both sides mover crown of roll utmost point attracted to align with the close stator salient poles magnetic field opposite sex, makes mover produce motion; And the electric current of B group coil, quadrature lagging on the waveform sequential, the mover magnetic salient pole that is produced, can only with stator salient poles to long half of last salient pole, like this, the mover salient pole of coil both sides, one side is a thrust, another side is a pulling force, all towards a direction; And when A group coil changes current direction, the mover salient pole of B group coil both sides correspondence is towards the direction motion of stator salient poles alignment, after A group coil has changed current direction, the pole orientation of mover that is in A group coil both sides correspondence was with originally opposite, at this moment, mover moves outside former alignment direction, forms two groups of coils of A, B, the magnetic force that produces also acts on mover simultaneously in the same way, makes mover produce the power of one times of former one group of coil.At this moment, the salient pole of B group coil on mover aligns with stator opposite sex salient pole, and A group coil both sides the salient pole on the mover and stator salient poles on half, prepare when the commutation of B group coil, align to the direction of the different in nature salient pole of stator; So, two groups of coils of A, B go round and begin again, and change current direction successively one by one, make mover produce the motion of a direction continuously.Reach a stroke of plunger pump up to the forward path of electric mover, under the control of control cabinet, motor begins to load the electric current of antitone sequence, makes the electric mover reversing motion.Electric mover 3 is made by heavy wall low carbon steel, and its outer surface is processed with the circular groove of space, in order to attract mutually with the stator iron core salient pole or to repel, makes the mover motion.Extraordinary linear bearing 10 in the motor stator 2 is made up of bearing bracket stand 15, little axle 16 and little bearing 17, a plurality of little bearings 17 are arranged along the belt direction of bearing bracket stand 15 by little axle 16 and are fixed on the bearing bracket stand 15, the metal-coating of little bearing 17 is processed into arc, forms good line with the surface of motor stator and contacts.

Claims

1, the oil-submersible extracting pump that a kind of DC stepping permanent magnetism straight line motor drives, by cable (1), motor stator (2), electric mover (3), reducing sheath (4), pump barrel (5), plunger (6), ball valve group (7) is formed, it is characterized in that: on the cable (1), the lower end is connected with coil in the motor stator (2) with ground control cabinet (8) respectively, on the motor stator (2), the lower end is connected with reducing sheath (4) with oil pipe (9) with screw thread respectively, reducing sheath (4) lower end is connected with pump barrel (5) with screw thread, motor stator (2), be respectively equipped with electric mover (3) and plunger (6) in the pump barrel (5), ball valve group (7), the electric mover lower end is connected with plunger (6) upper end.

2, the oil-submersible extracting pump of DC stepping permanent magnetism straight line motor driving according to claim 1, it is characterized in that, motor stator (2) is made up of extraordinary linear bearing (10), no magnetic urceolus (11), iron core (12), permanent magnet (13), coil (14), the stator coil of motor (14) overcoat one silicon steel plate, be divided into two groups of A, B, alternate intervals is installed, be connected with permanent magnet (13) between the stator iron core of adjacent windings A, B (12), adjacent stators iron core (12) magnetic pole is opposite, permanent magnet (13) is an axial charging, forms many group permanent magnetic circuits.

3, the oil-submersible extracting pump of DC stepping permanent magnetism straight line motor driving according to claim 1 is characterized in that, electric mover (3) is made by heavy wall low carbon steel, and its outer surface is processed with the circular groove of space.

4, the oil-submersible extracting pump of DC stepping permanent magnetism straight line motor driving according to claim 1, it is characterized in that the extraordinary linear bearing (10) in the motor stator (2) is made up of bearing bracket stand (15), little axle (16) and little bearing (17), a plurality of little bearings (17) are arranged along the belt direction of bearing bracket stand (15) by little axle (16) and are fixed on the bearing bracket stand (15), and the metal-coating of little bearing (17) is processed into arc.