CN203441727U - Submersible linear motor sealing system - Google Patents

Abstract

The utility model relates to a submersible linear motor sealing system. The submersible linear motor sealing system comprises an upper connecting hoop (1), an annular sleeve (2), a sand scraping ring (3), an annular base (4), a sealing ring and a lower connecting hoop (5), wherein the two ends of the annular sleeve (2) are connected with the upper connecting hoop (1) and the lower connecting hoop (5) respectively, the sand scraping ring (3), the annular base (4) and the sealing ring are arranged between the upper connecting hoop (1) and the lower connecting hoop (5), and the sand scraping ring (3) is contained in the annular base (4). According to the submersible linear motor sealing system, compound anti-abrasion materials are adopted to form a sealing system, and therefore the submersible linear motor sealing system is high in hardness, resistant to abrasion, good in sealing performance, free of leakage, high in pump efficiency and long in service life. Due to the fact that the sand scraping ring and an automatic consumption metal ring are arranged, sand blocking is not prone to happening, sand-preventive effect is good, and the problems that when being sealed in an oil well high in sand content, an existing submersible linear motor oil well pump is prone to damage and sand blocking, low in pump efficiency and short in pump inspection period are solved.

Description

Oil immersion line motor sealing system

Technical field

The utility model belongs to oilfield machinery field, particularly a kind of oil immersion line motor sealing system.

Background technique

At present, oil immersion line motor oil well pump is due to oil recovery cable, directly in down-hole, drive oil well pump to produce to-and-fro motion and do not need intermediate conversion mechanism, there is the advantages such as transmission efficiency is high, dynamic response is fast, it cancels sucker rod and the ground driving mechanism of traditional pumping well, and crude oil is lifted to ground, has thoroughly solved directional well rod and tube partial-wear problem, the required energy consumption of lifting arm and loss of plunger stroke have been eliminated, the exploitation of be more suitable for directional well, horizontal well, deeply taking out well and hyposmosis well.But due to containing sand drain, lip-type packing, seal rubber pad that the mover sealing system of existing linear electric motor adopts, along with the type frequently reciprocating of oil pump plunger piston, the aggravation of mover sealing wear, causes motor cavity Jin Bowl liquid and burns.So, need to develop new sealing system and occur to prevent the problems such as sand grains wearing and tearing and sand card.

Summary of the invention

The purpose of this utility model is to provide a kind of oil immersion line motor sealing system, solve existing oil immersion line motor oil well pump at height containing fragile, the easy sand card of oil well sealing of sand, the problem such as pump efficiency is low, pump detection period is short.

The utility model is achieved through the following technical solutions: oil immersion line motor sealing system, this device comprises box cupling, ring set, the ring of strike-ofing, ring seat, seal ring and lower box cupling, ring set two ends connect respectively box cupling and lower box cupling, between upper box cupling and lower box cupling, be provided with successively the ring of strike-ofing, ring seat and seal ring, the ring of strike-ofing is sat and is contained in ring seat.

Described seal ring comprises soft seal ring and hard seal ring, and soft seal ring and hard seal ring alternate intervals are arranged.

Described seal ring outside is set with spring.

Righting pipe is housed between described ring seat and seal ring.

Adopt the good effect of technique scheme: the utlity model has following advantage:

1, the utility model has adopted the sealing system that composite abrasion resistance material forms, and the inner ring of strike-ofing adopts salt bath compound process, and hardness is high, wear resistance good; The combined sealing ring at multiple tracks soft or hard interval has automatic compensation function, good seal, without leakage, lastingly wear-resisting, pump efficiency is high, long service life;

2, due to ring and the automatic compensation sealing ring of strike-ofing, sand grains can not enter stator, is difficult for forming sand card, and sand controlling result is good;

3, there is righting function, eccentric wear occurs while preventing plunger upward and downward, increase the service life;

4, simple, the save trouble and labor of operation, easy processing, without specific (special) requirements, be easy to penetration and promotion.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is use view of the present utility model.

In figure, box cupling on 1,2 ring sets, 3 rings of strike-ofing, 4 ring seats, 5 times box cuplings, 6 soft seal rings, 7 hard seal rings, 8 springs, 9 righting pipes, standing valve on 10,11 upper travelling valve, 12 sealing systems, 13 oil immersion line motors, 14 lower travelling valves, 15 times standing valves, 16 plungers.

Embodiment

Below in conjunction with accompanying drawing, the technical solution of the utility model is described further, but should not be construed as restriction of the present utility model:

Fig. 1 is structural representation of the present utility model, as shown in the figure, oil immersion line motor sealing system, this device comprises box cupling 1, ring set 2, strike-off and encircle 3, ring seat 4, seal ring and lower box cupling 5, ring set 2 two ends connect respectively box cupling 1 and lower box cupling 5, upper box cupling and lower box cupling for two ends respectively with the connection of oil pipe and oil immersion line motor, between upper box cupling 1 and lower box cupling 5, be provided with successively the ring 3 of strike-ofing, ring seat 4 and seal ring, the ring 3 of strike-ofing is sat and is contained in ring seat 4, strike-off ring for preventing that sand grains from entering motor, the ring of strike-ofing adopts QPQ salt bath compound process, hardness is high, sand control and wear resistance are good.

Because seal ring weares and teares quite serious in use, the seal ring of this device comprises soft seal ring 6 and hard seal ring 7, soft seal ring 6 and hard seal ring 7 alternate intervals are arranged, there is the effect of auto-compensation wearing and tearing, good sealing effect, can prevent that Han Sha Bowl liquid from entering burn-down of electric motor motor, not produce the fault in silt blocking motor gap, guarantee that oil immersion line motor efficiently moves.

In order to prevent causing crude oil leakage after seal ring from wearing and tearing, described seal ring outside is set with spring 8, and spring compression seal ring, makes it hold plunger tightly, even if seal ring has certain wearing and tearing like this, also can not leak.

Because plunger is very long, therefore, righting pipe 9 is housed between described ring seat 4 and seal ring, righting pipe has the effect of righting, can prevent eccentric wear, increases the service life.

Fig. 2 is use view of the present utility model, and as shown in the figure, in utilization, box cupling and lower box cupling are arranged on the utility model at the two ends of oil immersion line motor 13, and a set of sealing system 12 is respectively installed at the two ends of oil immersion line motor, and the ring of strike-ofing is positioned at outside.Upper standing valve 10, lower standing valve 15 are contained in respectively on oil pipe, and upper travelling valve 11, lower travelling valve 14 lay respectively at the two ends up and down of plunger 16, and plunger does straight line motion in the cavity of oil immersion line motor and sealing system formation, and crude oil is pumped.

In using process, oil immersion line motor is directly changed into electric energy the mechanical energy that drives plunger to do reciprocating linear motion, it is mainly the process of having simplified traditional pumping unit system pumping crude oil, oil-submersible linear electric motor mover directly drives oil well pump short-plunger to do up and down reciprocatingly straight line motion, thereby reaches the object of lifting crude oil.Working principle as shown in Figure 2, when oil immersion line motor is secondary while moving upward, drive plunger moves upward, oil immersion line motor oil well pump is done upstroke motion, and now, the lower pump chamber below lower short-plunger increases, pressure reduces, under the effect of pressure reduction, lower travelling valve is closed, and lower standing valve is opened, crude oil enters lower pump chamber, and upper pump chamber above upper short-plunger reduces, pressure increases, under the effect of pressure reduction, upper travelling valve is closed, upper standing valve is opened, and upper pump chamber crude oil is entered oil pipe by lifting, then discharges; In like manner, when oil immersion line motor is secondary while moving downward, drive plunger to move downward, oil immersion line motor oil well pump is done down stroke motion, now, the crude oil in the lower pump chamber of plunger compression, the lower pump chamber below lower short-plunger reduces, pressure increases, and upper pump chamber above upper short-plunger increases, pressure reduces, and under the effect of pressure reduction, upper and lower two standing valves cut out, two traveling valves are all opened, and lower pump chamber crude oil enters pump chamber.The secondary short-plunger that drives one on the other of oil immersion line motor is done straight reciprocating motion, and oil immersion line motor oil well pump has just completed a pumping.Repeat to circulate, constantly crude oil is discharged, thereby complete the object of crude oil lifting.Oil-submersible linear electric motor mover two ends are designed to sealing system; because oil immersion line motor self can not form seal section; can only be symmetrically formed seal section at motor shaft two ends, form a Seal cage, make motor and crude oil isolation; prevent that crude oil from flowing into motor damage after motor; play the effect of protection motor, meanwhile, the Seal cage of oil immersion line motor should be injected to dynamo oil in use; during motor movement, dynamo oil under pressure, flows back and forth in cavity.The mobile one side of dynamo oil can reduce the temperature of motor internal, can play lubricated effect on the one hand.

Sealing system of the present utility model, easy to use, can guarantee pumping containing in the oil well of sand≤1%, extend pump detection period, improve pump efficiency, the problems such as sand grains wearing and tearing and sand card that can prevent again occur, sand controlling result is remarkable, increases substantially the working life containing sand oil well oil immersion line motor.

Claims (4)

1. an oil immersion line motor sealing system, it is characterized in that: comprise box cupling (1), ring set (2), the ring (3) of strike-ofing, ring seat (4), seal ring and lower box cupling (5), ring set (2) two ends connect respectively box cupling (1) and lower box cupling (5), between upper box cupling (1) and lower box cupling (5), be provided with successively strike-off ring (3), ring seat (4) and seal ring, the ring (3) of strike-ofing is sat and is contained in ring seat (4).

2. oil immersion line motor sealing system according to claim 1, is characterized in that: described seal ring comprises soft seal ring (6) and hard seal ring (7), and soft seal ring (6) and hard seal ring (7) alternate intervals are arranged.

3. oil immersion line motor sealing system according to claim 1, is characterized in that: described seal ring outside is set with spring (8).

4. oil immersion line motor sealing system according to claim 1, is characterized in that: righting pipe (9) is housed between described ring seat (4) and seal ring.

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