CN106611101B - method for determining pump clearance value of electric submersible screw pump and electric submersible screw pump - Google Patents
method for determining pump clearance value of electric submersible screw pump and electric submersible screw pump Download PDFInfo
- Publication number
- CN106611101B CN106611101B CN201510702992.7A CN201510702992A CN106611101B CN 106611101 B CN106611101 B CN 106611101B CN 201510702992 A CN201510702992 A CN 201510702992A CN 106611101 B CN106611101 B CN 106611101B
- Authority
- CN
- China
- Prior art keywords
- electric submersible
- stator
- screw pump
- submersible screw
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 54
- 229920001971 elastomer Polymers 0.000 claims abstract description 138
- 239000005060 rubber Substances 0.000 claims abstract description 138
- 230000008569 process Effects 0.000 claims abstract description 9
- 230000008961 swelling Effects 0.000 claims description 18
- 238000005259 measurement Methods 0.000 claims description 11
- 238000003754 machining Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 238000009533 lab test Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 2
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 2
- 239000003345 natural gas Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 30
- 238000012360 testing method Methods 0.000 description 29
- 230000005611 electricity Effects 0.000 description 12
- 238000005086 pumping Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 239000003129 oil well Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004224 protection Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 230000005483 Hooke's law Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- 241000208340 Araliaceae Species 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008484 agonism Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
- F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
- F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
- F04C2/1075—Construction of the stationary member
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
- G16Z99/00—Subject matter not provided for in other main groups of this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2210/00—Fluid
- F04C2210/20—Fluid liquid, i.e. incompressible
- F04C2210/206—Oil
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a method for determining a pump clearance value of an electric submersible screw pump, and belongs to the field of petroleum and natural gas. The method for determining the pump gap value comprises the following steps of (1) obtaining the working interference magnitude of the electric submersible screw pump based on the single-stage bearing pressure of a rotor in the electric submersible screw pump, the coefficient related to the positive pressure and the single-stage bearing pressure of stator rubber in the electric submersible screw pump, the elastic coefficient of the stator rubber and the influence coefficient product value on the single-stage bearing capacity; (2) obtaining an initial interference value of the electric submersible screw pump based on the working interference, an interference value generated by thermal expansion of the stator rubber, an interference value generated by oil expansion of the stator rubber, the shrinkage of the stator rubber under a high-pressure condition and the abrasion generated in the operation process of the stator rubber and the rotor; (3) and obtaining a pump clearance value based on the working interference magnitude and the initial interference value of the electric submersible screw pump.
Description
Technical field
The present invention relates to petroleum gas fields, in particular to the determination method and electricity of the pump gap width of electric submersible screw pump
Submersible screw pump.
Background technique
Oil recovery system with electric submersible screw pump is that submersible motor is placed in underground, directly drives screw pump using underground submersible motor
Liquid is lifted, energy conservation is even higher up to 30% compared with sucker rod pump.Electric submersible screw pump can be applied to heavy oil wells, sand output well, contain
Gas well, inclined shaft and horizontal well, to significant effect phenomena such as avoiding because pumping sand card, rod parting, kelly caused by shaking out, simultaneously
Electric submersible screw pump will not generate agonism to oil reservoir.
But there is also some problems in the application for electric submersible screw pump.Such as electric submersible screw pump is in high-speed rotating state
Lower work, the revolution speed of electric submersible screw pump is high in the course of work, temperature is high and rubber deformation amount is big, if shutting down suddenly at this time, by
Rubber under the condition of high temperature can not be shunk, burnt so as to cause pump locking, electrode etc.；And it is opened again playing pump initial stage and pumping to shut down
When dynamic, also frequently occur pumping the situations such as difficulty, so that electric submersible screw pump can not work normally.
The shrink value cooperated between underground pump stator and rotor as a result, influences the working characteristics of down-hole pump very big.It is fixed
Son and rotor engagement tension will cause the increase of torque although can be realized abundant lifting, and abrasion is accelerated, and pump efficiency reduces etc.
Consequence；And stator and rotor engagement are excessively loose, and can not achieve effective lifting.
Summary of the invention
In order to solve at least one aspect of the above-mentioned problems in the prior art and defect, the present invention provides one kind
The determination method and electric submersible screw pump of the pump gap width of electric submersible screw pump.The technical solution is as follows:
It is an object of the present invention to provide a kind of determination methods of the pump gap width of electric submersible screw pump.
It is a further object of the present invention to provide a kind of electric submersible screw pumps.
According to an aspect of the invention, there is provided a kind of determination method of the pump gap width of electric submersible screw pump, the pump
The determination method of gap width the following steps are included:
(1) single-stage based on rotor in the electric submersible screw pump bears stator rubber in pressure and the electric submersible screw pump
Normal pressure and the single-stage bear the related coefficient of pressure, the coefficient of elasticity of the stator rubber and to the single-stage pressure-bearing energy
The influence coefficient product value of power obtains the work magnitude of interference of the electric submersible screw pump；
(2) shrink value, the stator rubber generated based on the work magnitude of interference, the stator rubber by thermal expansion
The shrink value that is generated by oil expansion, the shrinkage that generates under high pressure of the stator rubber and the stator rubber with
The abraded quantity generated in the rotor operation process obtains the initial shrink value of the electric submersible screw pump；
(3) the work magnitude of interference based on the electric submersible screw pump and the initial shrink value obtain the pump gap width.
Specifically, in step (1), the single-stage of the rotor bear the preparation method of pressure the following steps are included:
A1 measures the maximum pressure value of the electric submersible screw pump outlet side and the maximum pressure value of suction side；
The maximum pressure value of maximum pressure value and the suction side of the a2 based on the outlet side obtains pressure difference value；
A3 makes the series of the pressure difference value and the electric submersible screw pump be divided by obtain the single-stage of the rotor and bear pressure.
Further, the coefficient of elasticity of the stator rubber is elasticity modulus, the stator based on the stator rubber
The value that the average thickness of the compressing area of rubber and the stator rubber obtains.
Further, the normal pressure of the stator rubber is that the rotor obtained by actual measurement is applied to the stator rubber
The pressure of glue.
Further, the influence coefficient product value to single-stage bearing capacity is the revolution speed of the electric submersible screw pump to list
Influence coefficient and machining accuracy of the influence coefficient, fluid viscosity of grade bearing capacity to single-stage bearing capacity are to single-stage bearing capacity
Influence coefficient product.
Further, the coefficient relevant to the normal pressure of stator rubber and single-stage receiving pressure, the latent screw rod of the electricity
Influence coefficient, fluid viscosity influence coefficient and machining accuracy to single-stage bearing capacity of the revolution speed of pump to single-stage bearing capacity
Influence coefficient to single-stage bearing capacity is measured value.
Further, the stator rubber is the swelling based on the stator rubber by the shrink value that oil swell generates
The value that rate, the eccentricity of the stator, the internal diameter of shell of the stator and the radius of the rotor obtain.
Specifically, the stator rubber is produced under high pressure by shrink value, the stator rubber of thermal expansion generation
Raw shrinkage and the stator rubber and the abraded quantity of the rotor during operation pass through the room under the conditions of simulation hole condition
Interior test is to measure the change in size of the short sample inner cavity of the stator to obtain.
Specifically, the initial interference be the electric submersible screw pump after completion of processing and carry out underground work it
Before, the shrink value that is measured in air at room temperature.
Specifically, the pump gap width is the interval value obtained by the work magnitude of interference and the initial interference.
Further, the expression formula of the work magnitude of interference are as follows:
δ=H/ (akc)
Wherein, δ is the work magnitude of interference；
Η is that the single-stage of the rotor bears pressure；
A is coefficient related with the normal pressure and single-stage receiving pressure；
K is the coefficient of elasticity；
C is the influence coefficient product value to single-stage bearing capacity.
Further, the expression formula of the initial interference are as follows:
δ1=δ-δ2-δ3+δ4+δ5
Wherein, δ1For the initial interference, unit mm；
δ is the work magnitude of interference, unit mm；
δ2For the shrink value that the stator rubber is generated by thermal expansion, unit mm；
δ3For the shrink value that the stator rubber is generated by oil swell, unit mm；
δ4For the shrinkage that the stator rubber generates under high pressure, unit mm；
δ5For the abraded quantity in the stator rubber and rotor operation process, unit mm.
Further, the expression formula for the shrink value that the stator rubber is generated by oil swell are as follows:
Wherein, δ3The shrink value generated for the stator rubber by oil swell；
W is the swelling ratio of the stator rubber；
E is the eccentricity of the stator；
R is the radius of the rotor；
R is the internal diameter of the stator casing.
According to another aspect of the present invention, the present invention also provides a kind of electric submersible screw pump, the electric submersible screw pump includes:
Stator, the both ends of the stator are respectively arranged with the top connection and lower contact connecting with oil pipe；
Rotor, the rotor are arranged in the inner cavity of the stator；
Stator rubber, the stator rubber is arranged between the stator and the rotor, and the inner cavity with the stator
Wall is fixedly connected, and is interference fitted between the rotor and the stator rubber；
Delivery connection, the delivery connection are arranged in the inner cavity of the top connection；
Driving device, the driving device is for driving the rotor to rotate；
Wherein, the range of the pump gap width between the stator and the rotor is 0~0.04mm, and the pump gap width
Determination method for the pump gap width of above-mentioned electric submersible screw pump obtains.
The beneficial effect of the technical scheme provided by the present invention is that:
(1) the determination method of the pump gap width of electric submersible screw pump provided by the invention and electric submersible screw pump are by the latent screw rod of electricity
The stator and impeller pump gap width for pumping Set under a well are designed as 0-0mm and two kinds of 0-0.04mm, and carry out the whole of laboratory test well
Unit test is covered, pressure rise, discharge capacity increase after by trial run 6 hours or more, thus illustrate the well after unit operates
Cylinder temperature rises, and stator rubber expansion, the gap between stator and rotor reduces, thus the gap interference of pump is set as 0-
0mm, 0-0.04mm are reasonable；
(2) the determination method of the pump gap width of electric submersible screw pump provided by the invention and electric submersible screw pump can effectively drop
Torque between low stator and rotor, guarantee rise a pump initial stage, pump shut down restart when can be avoided torque it is excessive caused by pump embrace
It waits indefinitely problem；
(3) the determination method of the pump gap width of electric submersible screw pump provided by the invention and electric submersible screw pump can guarantee electricity
The normal operation of submersible screw pump, while stator rubber expands after normal operation, there is certain leakproofness between stator and rotor, it can
To guarantee to pump the operting differential pressure effectively lifted, discharge capacity.
Detailed description of the invention
Fig. 1 is the flow chart of the determination method of the pump gap width of electric submersible screw pump according to an embodiment of the invention；
Fig. 2 is comparison diagram of the stator rubber according to figure 1 by oil expansion front and back design cavity；
The latent screw rod of electricity not at the same level that the determination method of the pump gap width of Fig. 3 electric submersible screw pump according to figure 1 obtains
The pump gap width parameter list of pump；
Fig. 4 is the interference tables of data of level-one electric submersible screw pump shown in Fig. 3；
Fig. 5 is the interference tables of data of second level electric submersible screw pump shown in Fig. 3；
Fig. 6 is parameter curve of the electric submersible screw pump shown in Fig. 3 in the case where pump gap width is 0.04mm, revolving speed is 240r/min
Variation diagram；
Fig. 7 is the interference tables of data of three-level electric submersible screw pump shown in Fig. 3；
Fig. 8 is that parameter curve of the electric submersible screw pump shown in Fig. 7 in the case where pump gap width is 0mm, revolving speed is 240r/min becomes
Change figure；
Fig. 9 is pump gap width-volumetric efficiency curve graph；
Figure 10 is outlet pressure-volumetric efficiency curve graph；
Figure 11 is outlet pressure-torque curve figure；
Figure 12 is the structural schematic diagram of electric submersible screw pump according to another embodiment of the present invention.
Wherein, 100 electric submersible screw pump, 10 stators, 20 rotors, 30 stator rubbers, 41 top connections, 42 lower contacts, 50 outlets
Connector, a stator rubber pass through the design cavity after oil expansion by the design cavity before oil expansion, b stator rubber.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Referring to Fig. 1, it illustrates the determination sides of the pump gap width of electric submersible screw pump according to an embodiment of the invention
The process of method.Electric submersible screw pump pump gap width determination method the following steps are included:
(1) single-stage based on rotor in electric submersible screw pump bears pressure, the normal pressure with stator rubber in electric submersible screw pump
Coefficient related with single-stage receiving pressure, the coefficient of elasticity of stator rubber and the influence coefficient product value to single-stage bearing capacity obtain
The work magnitude of interference of electric submersible screw pump；
(2) pass through oil expansion based on shrink value, stator rubber that work magnitude of interference, stator rubber are generated by thermal expansion to produce
It shrinkage that raw shrink value, stator rubber generate under high pressure and is generated in stator rubber and rotor operation process
Abraded quantity obtains the initial shrink value of the electric submersible screw pump；
(3) the work magnitude of interference based on electric submersible screw pump and initial shrink value obtain pump gap width.
In step (1), the magnitude of interference of work magnitude of interference, that is, electric submersible screw pump at work, work magnitude of interference is for guaranteeing
Needs pump pressure difference at work and meet oil well lifting.And the size for the magnitude of interference that works and the average thickness of rubber and elasticity
Modulus is related.At work, the normal pressure of stator rubber is bigger, and generated deformation values are bigger after compression, and then the interference that works
It measures bigger.
Since stator rubber is high resiliency body, Hooke's law is followed in the normal pressure of elastic range inner stator rubber.
Wherein, the normal pressure of stator rubber is the pressure that the rotor obtained by actual measurement is applied to stator rubber, and the stator rubber is just
Stator is directed toward by rotor in the direction of pressure, and the contact surface between rotor and stator is vertical.By Hooke's law it is found that the latent spiral shell of electricity
The expression formula of the normal pressure of stator rubber in bar pump are as follows:
(1)
Wherein, P is the normal pressure of stator rubber；
E is the elasticity modulus of stator rubber；
δ is work magnitude of interference；
S is the compressing area of stator rubber；
H is the average thickness (i.e. effective thickness) of stator rubber.
Later, pressure is born by the single-stage of rotor and obtains work magnitude of interference, wherein the single-stage of rotor bears obtaining for pressure
Method the following steps are included:
A1 measures the maximum pressure value of electric submersible screw pump outlet side and the maximum pressure value of suction side；
The maximum pressure value of maximum pressure value and suction side of the a2 based on outlet side obtains pressure difference value；
A3 make the series of pressure difference value and electric submersible screw pump be divided by obtain rotor single-stage bear pressure.
In practice, electric submersible screw pump is made of multistage, and wherein single-stage be exactly lead rotor length.
Single-stage bears the pressure that the rotor that pressure is exactly a lead length is born.Due to the pressure in each seal chamber of electric submersible screw pump
It is different from each other, it is also different so that the single-stage of each seal chamber bears pressure.And the method for applying finite element analysis can be improved
The single-stage of each seal chamber bears the precision of pressure.
The single-stage of rotor bears the expression formula of pressure are as follows:
H=aPc (2)
Formula (1) substitution formula (2) can be obtained:
By formula (3) it is found that the expression formula of coefficient of elasticity are as follows:
Formula (3) substitution formula (4) can be obtained:
H=ak δ c (5)
It can be obtained by formula (5) deformation:
δ=H/ (akc)
Wherein, δ is work magnitude of interference；
A is coefficient related with the normal pressure of stator rubber and single-stage receiving pressure；
K is coefficient of elasticity；
C is the influence coefficient product value to single-stage bearing capacity；
H is that the single-stage of rotor bears pressure；
P is the normal pressure of stator rubber.
By formula (4) it is found that the coefficient of elasticity of stator rubber is the pressure of elasticity modulus based on stator rubber, stator rubber
The value that the average thickness of contracting area and stator rubber obtains.In formula, the influence coefficient product value to single-stage bearing capacity is electricity
Influence coefficient of influence coefficient, fluid viscosity of the revolution speed of submersible screw pump to single-stage bearing capacity to single-stage bearing capacity and add
The product of influence coefficient of the work precision to single-stage bearing capacity.
Specifically, the coefficient of elasticity of stator rubber, electric submersible screw pump influence coefficient of the revolution speed to single-stage bearing capacity,
Influence coefficient and machining accuracy influence coefficient to single-stage bearing capacity of the fluid viscosity to single-stage bearing capacity is in specific item
Measured value under part.Measured value under specified conditions refers to the influence for not considering that temperature is swollen, medium swelling is to stator rubber, and the latent spiral shell of electricity
Bar pumps discharge pressure and stablizes, and medium has fixed structure the conditions actual measured value obtained such as not to be damaged.
After obtaining work magnitude of interference, initial interference is obtained by work magnitude of interference.Key parameter is just in the design
It is initial interference.Initial interference is exactly before electric submersible screw pump is gone into the well after completion of processing, measured in air at room temperature
Magnitude of interference, i.e. the interference clearance value of electric submersible screw pump.
When down-hole pump works normally, shrink value between rotor (work magnitude of interference) are as follows:
δ=δ1+δ2+δ3-δ4-δ5 (6)
It can be obtained by formula (6):
δ1=δ-δ2-δ3+δ4+δ5
Wherein, δ1For initial interference, unit mm；
δ2For the shrink value that stator rubber is generated by thermal expansion, unit mm；
δ3For the shrink value that stator rubber is generated by oil swell, unit mm；
δ4For the shrinkage that stator rubber generates under high pressure, unit mm；
δ5For stator rubber and the abraded quantity of rotor during operation, unit mm；
δ is work magnitude of interference, unit mm.
Specifically, stator rubber by thermal expansion generate shrink value, stator rubber generated by oil swell shrink value,
The shrinkage and stator rubber and the abraded quantity of rotor during operation that stator rubber generates under high pressure can use experiment
Method determines that experiment needs carry out on electric submersible screw pump experimental provision.At the scene under the conditions of hole condition, stator rubber passes through heat
Expand the shrink value generated, the shrinkage that stator rubber generates under high pressure and stator rubber and rotor during operation
Abraded quantity can by laboratory experiment simulate hole condition under the conditions of, measure the short sample inner cavity (bore of stator) of stator size changing amount
It determines, related data is collected by data collection system later, be depicted as characteristic curve, carry out analytical calculation.Stator rubber
Heat expansion amount can by dilatometer according to related assays require measurement stator rubber sample thermal expansion amount.As shown in connection with fig. 2,
The method of the sub- swell rubber amount of measurement be first according to professional standard " SHT 1159-1992 nitrile rubber swellbility measurement side
Method " measurement stator rubber swelling ratio w (i.e. swellbility), the swelling ratio can directly by experiment measure, certain this field skill
For art personnel it will be appreciated that the swelling ratio can also be by being obtained through actual measurement at the scene, those skilled in the art can root
It is selected accordingly according to needs.Swelling area S is calculated according to the sectional dimension of stator rubber after measuring swelling ratio, finally
Swelling ratio δ is derived by swelling ratio theoretical calculation formula3, i.e., stator rubber as shown in Figure 2 passes through the design before oil swell
Cavity a and stator rubber pass through the swellbility δ between the design cavity b after oil swell3, swelling ratio expression formula are as follows:
The expression formula of the swelling area of stator rubber are as follows:
S=8E δ3+2πrδ3-πδ3 2 (8)
Formula (7) substitution formula (8) can be obtained:
8Eδ3+2πrδ3-πδ3 2=(π R2-8Er-πr2)w (9)
It can be obtained by formula (9):
(10) πδ3 2-(8E+2πr)δ3+(πR2-8Er-πr2) w=0
It can be obtained by formula (10):
Wherein, δ3The shrink value generated for stator rubber by oil swell；
S is the swelling area that stator rubber passes through oil swell；
W is swelling ratio of the stator rubber by oil swell；
E is the eccentricity of stator；
R is the radius of rotor；
R is the internal diameter of outer cover of stator.
It follows that stator rubber is to expand area, stator rubber based on stator rubber by the shrink value that oil swell generates
Glue swelling ratio, the eccentricity of stator, the value that obtains of radius of the internal diameter of outer cover of stator and rotor.Those skilled in the art can manage
Solution, stator rubber is by thermally expanding the shrink value generated, the shrinkage that stator rubber generates under high pressure and stator rubber
It can also be measured according to experiment according to actually measuring with the abraded quantity of rotor during operation, pass through reality
The principle of test amount is similar with the acquisition principle of shrink value that the oil swell of said stator rubber generates, and no longer goes to live in the household of one's in-laws on getting married one by one herein
It states.After obtaining work magnitude of interference and initial interference, will work interval value that magnitude of interference and initial interference are formed as
Pump gap width.
Paper " slight interference screw rod of the 6th oil recovery factory GAO YANHUA of Daqing oil field on petroleum and petrochemical industry energy saving 8th phase in 2014
Pump in the poly- test application for driving block " in discuss work feelings when screw pump shrink value is 0.15mm, 0.10mm and 0.00mm
Condition, averagely production liquid, pump efficiency increased, and torque decreases, and the working condition of pump makes moderate progress.But it is not according to practical survey
Examination proposes a reasonable pump gap shrink value.
And the gap of screw pump shown by field practice and rubber deformation amount is influences electric submersible screw pump service life
Critical issue.Ground drives electric submersible screw pump, and when pump gap width is 0.10-0.20mm, when starting needs by ground motor
Large torque start by force, but the pump gap of electric submersible screw pump all be using conventional ground driving screw pump gap shrink value,
Motor torque is small, causes often start.
According to field experience, shrink value bigger than normal is the main reason for causing electric submersible screw pump failure, it not only increases rotor
Frictional force between stator, and the heat generated that rubs can accelerate the aging of stator rubber, reduce the service life of stator,
The problems such as rotor locking and stator degumming can occur when serious.Therefore, to find rotor according to produced on-site situation suitable with stator
Shrink value i.e. pump gap width it is very important.
In step (1), for underground electrical submersible pump, work magnitude of interference be composite factor influence as a result, by
It is more in the relevant parameter for the work magnitude of interference for determining electric submersible screw pump, many parameters can not precise measurement, the essence of parameter in addition
True degree can have a huge impact result, and especially the stator of underground electrical submersible pump and rotor are relatively long, interference
Value is inconsistent along axial variation.And initial interference is not only related with the work magnitude of interference in step 1 in step 2,
Abraded quantity also with the various modifications of stator rubber and in operation is related.And stator rubber is with its component difference, operating condition
The variation of environment, heat expansion amount, swelling quantity also have biggish difference, and major influence factors include system pressure, lifting medium
Temperature, viscosity, aqueous, air content, working speed and rotor machining accuracy etc. can all influence final interference to some extent
The size of amount.In addition, the hardness of stator rubber also influences whether the interference of the lifting pressure head and electric submersible screw pump of electric submersible screw pump
Amount.Stator rubber is softer, and the magnitude of interference of electric submersible screw pump is bigger, could obtain comparable pressure head in this way.Due to these factors
It is all to be difficult to accurate determination, therefore can determine whether a certain range of pump gap width is meeting oil well just by test method
The needs often lifted.Certainly it will be understood by those skilled in the art that the method for test can use laboratory test, can also use
Live actual measurement, those skilled in the art can according to need to be selected accordingly.
For above situation, the method test that is detected using hydraulic characteristic(s), it is ensured that whether the quality of down-hole pump qualified, i.e., with
Discharge capacity, torque, volumetric efficiency and the pump efficiency being easier under parameter-different pressures of detection, to control the structural parameters of down-hole pump
Whether machining accuracy is met, and whether duty parameter is scientific and reasonable.The data specifically tested include: ground handling parameter testing and well
The test of lower pressure.Wherein the test of ground handling parameter includes running current, voltage, working speed, system effectiveness, work torsion
Square etc..The test of down-hole pressure includes stream pressure and static pressure.
Specifically, electrical parameter can be read by frequency-conversion control cabinet, and revolution speed can pass through ground control cabinet recorder
It reading, stream pressure and static pressure test can be connect below tubing string by well pressure measuring instrument in operation, memory-type test is carried out,
It can periodically receive, play back.By improving front and back comparison to pump-type shrink value of the same race, the operation torque of improved pump can be learnt
It decreases than conventional interference screw pump, it is possible thereby to illustrate that the idle work consumption of electric submersible screw pump is reduced, electric submersible screw pump
Gross efficiency improves, and then can illustrate that parameter adjustment is reasonable.
The determination method of the pump gap width of electric submersible screw pump of the invention is further illustrated below by practical embodiments
Specific steps.
North China Oilfield averagely pumps depth 1000m or so, moves level range 500-800m, oil pipe head of liquid about 6.5MPa, well
Mouthful back pressure is not higher than 0.5MPa, manage in delay resistance 1.0MPa, so electric submersible screw pump is under conditions of lifting pressure head 8.0MPa,
Volumetric efficiency reaches the 60% lifting requirement that can meet oil field different blocks difference oil well.
The magnitude of interference fit dimension between stator and rotor is devised according to the discharge capacity of electric submersible screw pump, indoors test bar
Under part, to the magnitude of interference (i.e. pump gap width) between the stator and rotor of different screw pumps do it is further preferably and amendment.When
Right those skilled in the art can also carry out at the scene actual measurement to correct the magnitude of interference between stator and rotor.Pass through observation
Under conditions of magnitude of interference between different stators and rotor matches, the waterpower working characteristics of electric submersible screw pump, with evaluation and it is excellent
Select reasonable magnitude of interference.
The data tested needed in test include: ground handling parameter testing and the test of down-hole pressure.Wherein ground
The test of running parameter includes running current, voltage, working speed, system effectiveness, operation torque etc..The test bag of down-hole pressure
Include stream pressure and static pressure.Wherein, electrical parameter can be tested by frequency-conversion control cabinet.Be equipped in frequency-conversion control cabinet overload, underload,
The automatic shutdown protections electrical equipments such as disconnected phase, electric leakage, when the operating current of driving motor is more than the overload current of setting or is approached
When the idle electric current of driving motor, liquid level is too low, carries out stoppage protection, and the electrical parameters such as energy record current automatically.
Electric current, voltage, working speed, system effectiveness and operation torque can be read directly in frequency-conversion control cabinet, wherein electricity ginseng
Number test is the most commonly used is operating current is measured with ammeter, because the size of operating current directly reflects the big of workload
It is small, while some failures can also be diagnosed according to the size of operating current.The defeated of motor is measured by using power instrument or kilowatt-hour meter
Enter power, so as to calculate the system effectiveness of electric submersible screw pump producing well.
Tachometric survey mainly applies ground control cabinet recorder to be recorded, and revolving speed is the main of electric submersible screw pump oil recovery
Running parameter, it determines the discharge capacity of screw pump.Stream pressure and static pressure test in ground handling parameter testing is due to the latent screw rod of electricity
Channel and test technology of the pump sump without pressure gauge of going into the well, therefore using level surface method conversion stream pressure and static pressure, it is specific to calculate and have bar
It pumps similar.Such as can be connect below tubing string by well pressure measuring instrument in operation, memory-type test is carried out, can periodically be connect
It receives, playback.
A whole set of electric submersible screw pump unit after processing is completed, the electric submersible screw pump of different pump gap widths is distinguished respectively
Indoor performance detection is carried out, and simulation test is carried out in test well to a whole set of unit, is tested item by item according to testing program, respectively
Item index reaches design requirement, and stator and rotor magnitude of interference work-in parameters are as shown in Figure 3.It will be understood by those skilled in the art that
Performance detection can also be carried out under actual condition to the electric submersible screw pump of different pump gap widths, no longer arranged one by one herein
It lifts.This example is only a kind of illustrated examples, is not construed as to a kind of limitation of the invention.
Referring to fig. 4 to Fig. 8, as can be seen from the test results, improved pump discharge pressure is 8.0MPa under same revolving speed
When, volumetric efficiency reaches 60% or more, therefore can satisfy the lifting requirement of oil field different blocks difference oil well.
From test data it can also be seen that under conditions of pumping lift-off pressures is 8.0MPa, GLB75-40 electric submersible screw pump
Pump gap width when being down to improved 0.04mm and 0.00mm by original 0.20mm, volumetric efficiency is changed to by 70.3%
68.6%, it is held essentially constant.It is possible thereby to illustrate that the jacking capacity of electric submersible screw pump does not change substantially, electric submersible screw pump
Operation torque changes to 141Nm by 158Nm, reduces nearly 20Nm than conventional interference screw pump, illustrates electric submersible screw pump
Idle work consumption is reduced, and the gross efficiency of electric submersible screw pump improves.
Electric submersible screw pump improves front and back running parameter variation as shown in Figures 9 to 11, experiments have shown that, the pump of electric submersible screw pump
After gap width improves, the jacking capacity of electric submersible screw pump is barely affected, and the gross efficiency of electric submersible screw pump increases, and is reached
The requirement of optimization magnitude of interference.Therefore, gap width is pumped in electric submersible screw pump to determine between 0~0.04mm, this pump gap width
Fit clearance is reasonable between electric submersible screw pump stator and rotor, keeps away when playing pump initial stage, pump working normally, when pump is shut down and restarted
Phenomena such as having exempted from pump locking can work normally.
Referring to Figure 12, it illustrates electric submersible screw pumps 100 according to another embodiment of the present invention.Electric submersible screw pump 100
Including stator 10, rotor 20, stator rubber 30, top connection 41, lower contact 42, delivery connection 50 and driving device (not shown).
Specifically, the both ends of stator 10 are respectively arranged with top connection 41 and lower contact 42, and top connection 41 is connection electric submersible screw pump and oil
The connector of pipe, lower contact 42 can connect oil pipe, also can connect other accessories, those skilled in the art can according to need into
The corresponding selection of row.
Rotor 20 is arranged in the inner cavity of stator 10, and rotor 20 is spiral steel solid, and processed molding is laggard
Row chrome-faced processing increases wear-resisting property.The stator matched with 30 structure of rotor is filled in the steel outer cylinder of stator 10
Rubber 30, so that stator rubber 30 is fixedly connected with the internal chamber wall of stator 10, and stator rubber 30 be formed by shape with
Rotor 20 is fitted to each other, and then can be better achieved between rotor 20 and stator rubber 30 and be interference fitted.Delivery connection 50 is set
It sets in the inner cavity of top connection 41.Driving device is for driving rotor 20 to rotate.Wherein, between the pump between stator 10 and rotor 20
The range of gap value is 0~0.04mm, and pumps the determination for the pump gap width that gap width is electric submersible screw pump through the foregoing embodiment
Method obtains, and details are not described herein.
Pass through ground control cabinet in oil pumping process for signal through cable transfer to downhole electrical motor, driving retarder and underground
Pump is lifted to ground by the turning handle well liquid of rotor, completes a pumping process.Electric submersible screw pump is since revolving speed is high, temperature is high
Etc. frequently resulting in pump locking, holddown etc., can not work normally, thus devise electric submersible screw pump gap shrink value be determined as 0~
Between 0.04mm, by indoor and field test, electric submersible screw pump of the invention is able to solve the problem of pumping locking.
The beneficial effect of the technical scheme provided by the present invention is that:
(1) the determination method of the pump gap width of electric submersible screw pump provided by the invention and electric submersible screw pump are by the latent screw rod of electricity
The stator and impeller pump gap width for pumping Set under a well are designed as 0-0mm and two kinds of 0-0.04mm, and carry out the whole of laboratory test well
Unit test is covered, pressure rise, discharge capacity increase after by trial run 6 hours or more, thus illustrate the well after unit operates
Cylinder temperature rises, and stator rubber expansion, the gap between stator and rotor reduces, thus the gap interference of pump is set as 0-
0mm, 0-0.04mm are reasonable；
(2) the determination method of the pump gap width of electric submersible screw pump provided by the invention and electric submersible screw pump can effectively drop
Torque between low stator and rotor, guarantee rise a pump initial stage, pump shut down restart when can be avoided torque it is excessive caused by pump embrace
It waits indefinitely problem；
(3) the determination method of the pump gap width of electric submersible screw pump provided by the invention and electric submersible screw pump can guarantee electricity
The normal operation of submersible screw pump, while stator rubber expands after normal operation, there is certain leakproofness between stator and rotor, it can
To guarantee to pump the operting differential pressure effectively lifted, discharge capacity.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (13)
1. a kind of electric submersible screw pump pump gap width determination method, it is described pump gap width determination method the following steps are included:
(1) just according to stator rubber in the single-stage receiving pressure of rotor in the electric submersible screw pump and the electric submersible screw pump
Pressure and the single-stage bear the related coefficient of pressure, the coefficient of elasticity of the stator rubber and to the single-stage bearing capacities
Coefficient product value is influenced, the work magnitude of interference of the electric submersible screw pump is obtained using following formula:
δ=H/ (akc)
Wherein, δ is the work magnitude of interference；
Η is that the single-stage of the rotor bears pressure；
A is coefficient related with the normal pressure and single-stage receiving pressure；
K is the coefficient of elasticity；
C is the influence coefficient product value to the single-stage bearing capacity；
(2) shrink value, the stator rubber generated based on the work magnitude of interference, the stator rubber by thermal expansion is passed through
Shrink value that oil expansion generates, the shrinkage that generates under high pressure of the stator rubber and the stator rubber with it is described
The abraded quantity generated in rotor operation process obtains the initial shrink value of the electric submersible screw pump；
(3) the work magnitude of interference based on the electric submersible screw pump and the initial shrink value obtain the pump gap width.
2. the determination method of the pump gap width of electric submersible screw pump according to claim 1, which is characterized in that
In step (1), the single-stage of the rotor bear the preparation method of pressure the following steps are included:
A1 measures the maximum pressure value of the electric submersible screw pump outlet side and the maximum pressure value of suction side；
The maximum pressure value of maximum pressure value and the suction side of the a2 based on the outlet side obtains pressure difference value；
A3 makes the series of the pressure difference value and the electric submersible screw pump be divided by obtain the single-stage of the rotor and bear pressure.
3. the determination method of the pump gap width of electric submersible screw pump according to claim 2, which is characterized in that
The coefficient of elasticity of the stator rubber is the compressing area of elasticity modulus based on the stator rubber, the stator rubber
The value obtained with the average thickness of the stator rubber.
4. the determination method of the pump gap width of electric submersible screw pump according to claim 3, which is characterized in that
The normal pressure of the stator rubber is the pressure that the rotor obtained by actual measurement is applied to the stator rubber.
5. the determination method of the pump gap width of electric submersible screw pump according to claim 4, which is characterized in that
Influence coefficient product value to the single-stage bearing capacity is the revolution speed of the electric submersible screw pump to single-stage bearing capacity
Influence the influence coefficient of coefficient, fluid viscosity to the influence coefficient and machining accuracy of single-stage bearing capacity to single-stage bearing capacity
Product.
6. the determination method of the pump gap width of electric submersible screw pump according to claim 5, which is characterized in that
The revolution speed of the relevant coefficient of pressure, the electric submersible screw pump is born to list to the normal pressure of the stator rubber and single-stage
Influence coefficient and machining accuracy of the influence coefficient, fluid viscosity of grade bearing capacity to single-stage bearing capacity are to single-stage bearing capacity
Influence coefficient be measured value.
7. the determination method of the pump gap width of electric submersible screw pump according to claim 6, which is characterized in that
The shrink value that the stator rubber is generated by oil swell is the bias based on the stator rubber swelling ratio, the stator
The value that radius away from, the internal diameter of outer cover of the stator and the rotor obtains.
8. the determination method of the pump gap width of electric submersible screw pump according to claim 7, which is characterized in that
Shrink value that the stator rubber is generated by thermal expansion, the shrinkage that generates under high pressure of the stator rubber and
The stator rubber passes through the laboratory test under the conditions of simulating hole condition with the abraded quantity of the rotor during operation to measure
The change in size of the short sample inner cavity of stator is to obtain.
9. the determination method of the pump gap width of electric submersible screw pump according to claim 1 to 8, which is characterized in that
The initial interference is the electric submersible screw pump after completion of processing and before carrying out underground work, in room temperature sky
The shrink value measured in gas.
10. the determination method of the pump gap width of electric submersible screw pump according to claim 9, which is characterized in that
The pump gap width is the interval value obtained by the work magnitude of interference and the initial interference.
11. the determination method of the pump gap width of electric submersible screw pump according to claim 10, which is characterized in that
The expression formula of the initial interference are as follows:
δ1=δ-δ2-δ3+δ4+δ5
Wherein, δ1For the initial interference, unit mm；
δ is the work magnitude of interference, unit mm；
δ2For the shrink value that the stator rubber is generated by thermal expansion, unit mm；
δ3For the shrink value that the stator rubber is generated by oil swell, unit mm；
δ4For the shrinkage that the stator rubber generates under high pressure, unit mm；
δ5For the abraded quantity in the stator rubber and rotor operation process, unit mm.
12. the determination method of the pump gap width of electric submersible screw pump according to claim 7, which is characterized in that
The expression formula for the shrink value that the stator rubber is generated by oil swell are as follows:
Wherein, δ3The shrink value generated for the stator rubber by oil swell；
W is the swelling ratio of the stator rubber；
E is the eccentricity of the stator；
R is the radius of the rotor；
R is the internal diameter of the shell of the stator.
13. a kind of electric submersible screw pump, which is characterized in that
The electric submersible screw pump includes:
Stator, the both ends of the stator are respectively arranged with the top connection and lower contact connecting with oil pipe；
Rotor, the rotor are arranged in the inner cavity of the stator；
Stator rubber, the stator rubber are arranged between the stator and the rotor, and solid with the internal chamber wall of the stator
Fixed connection, is interference fitted between the rotor and the stator rubber；
Delivery connection, the delivery connection are arranged in the inner cavity of the top connection；
Driving device, the driving device is for driving the rotor to rotate；
Wherein, the range of the pump gap width between the stator and the rotor is 0~0.04mm, and the pump gap width is root
It is obtained according to the determination method of the pump gap width of electric submersible screw pump of any of claims 1-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510702992.7A CN106611101B (en) | 2015-10-26 | 2015-10-26 | method for determining pump clearance value of electric submersible screw pump and electric submersible screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510702992.7A CN106611101B (en) | 2015-10-26 | 2015-10-26 | method for determining pump clearance value of electric submersible screw pump and electric submersible screw pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106611101A CN106611101A (en) | 2017-05-03 |
| CN106611101B true CN106611101B (en) | 2019-06-11 |
Family
ID=58613280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510702992.7A Active CN106611101B (en) | 2015-10-26 | 2015-10-26 | method for determining pump clearance value of electric submersible screw pump and electric submersible screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106611101B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112392459A (en) * | 2019-08-14 | 2021-02-23 | 中国石油天然气股份有限公司 | Method and device for determining production characteristics of electric submersible plunger pump well |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705233A (en) * | 2012-06-04 | 2012-10-03 | 中国石油天然气股份有限公司 | Method for matching stator and rotor of screw pump with oil production and equal wall thickness |
| CN104133937A (en) * | 2014-06-30 | 2014-11-05 | 沈阳工程学院 | Optimal design method of oil extraction screw pump stator rubber compounding |
| CN104234996A (en) * | 2014-06-13 | 2014-12-24 | 台州市德嘉机电科技有限公司 | Measuring method of clearance leakage amount of multi-rotor screw pump |
| CN104653455A (en) * | 2013-11-19 | 2015-05-27 | 中国石油天然气股份有限公司 | Method for adjusting axial clearance between stator and rotor of screw pump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8141646B2 (en) * | 2007-06-26 | 2012-03-27 | Baker Hughes Incorporated | Device and method for gas lock detection in an electrical submersible pump assembly |
-
2015
- 2015-10-26 CN CN201510702992.7A patent/CN106611101B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705233A (en) * | 2012-06-04 | 2012-10-03 | 中国石油天然气股份有限公司 | Method for matching stator and rotor of screw pump with oil production and equal wall thickness |
| CN104653455A (en) * | 2013-11-19 | 2015-05-27 | 中国石油天然气股份有限公司 | Method for adjusting axial clearance between stator and rotor of screw pump |
| CN104234996A (en) * | 2014-06-13 | 2014-12-24 | 台州市德嘉机电科技有限公司 | Measuring method of clearance leakage amount of multi-rotor screw pump |
| CN104133937A (en) * | 2014-06-30 | 2014-11-05 | 沈阳工程学院 | Optimal design method of oil extraction screw pump stator rubber compounding |
Non-Patent Citations (4)
| Title |
|---|
| 《Modeling and Operation of an Interior Permanent Magnet Motor Drive for Electric Submersible Pumps》;S. F. Rabbi et al;;《Oceans》;20150108;第1-5页； |
| 《全金属单螺杆泵定转子间隙对泵性能影响的研究》;孟凡国;《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》;20150415;第B019-28页； |
| 《双螺杆压缩机齿间间隙分布的计算》;熊伟 等；;《西安交通大学学报》;20040731;第38卷(第7期);第682-685页； |
| 《潜油双螺杆泵间隙的优化设计》;王炯 等；;《石油机械》;20081231;第36卷(第8期);第32-35页； |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106611101A (en) | 2017-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106761681B (en) | Electric pump well fault real-time diagnosis system and method based on time sequence data analysis | |
| CN103541723B (en) | Based on the rod-pumped well real-time working condition diagnostic method of surface dynamometer card area change | |
| EA024649B1 (en) | Estimating fluid levels in a progressing cavity pump system | |
| CN103498647A (en) | Parameter adjusting method and system for improving efficiency of oil pumping well system | |
| CN112832999B (en) | Electric pump well working condition diagnosis system and method based on multi-sensor data fusion | |
| CN202351071U (en) | Test table for screw drill tool | |
| Luo et al. | Analysis of vibration characteristics of centrifugal pump mechanical seal under wear and damage degree | |
| CN106611101B (en) | method for determining pump clearance value of electric submersible screw pump and electric submersible screw pump | |
| CN112329357A (en) | Simple diagnosis method and system for vibration fault of clean water centrifugal pump | |
| CN204612876U (en) | Compensate film pick-up unit auxiliary member and compensate film pick-up unit | |
| CN205027622U (en) | Impeller pump blade abrasion wear test machine | |
| CN104748956B (en) | A kind of test device and method of screw drilling tool motor performance | |
| Mingzhong et al. | Study on clearance optimization of all-metal screw pumps: experiment and simulation | |
| CN100363619C (en) | Method for diagnosing leakage of oil production well by ground driving screw pump | |
| CN109058090B (en) | Method and system for determining electric submersible direct-drive screw pump | |
| CN106837309B (en) | Method for inverting borehole volume expansion coefficient based on gas drilling vertical pressure change | |
| CN203323997U (en) | Testing arrangement of R600a refrigerator oil capillary blocking rate | |
| CN104514707B (en) | Detection device and detection method for electric submersible plunger pump | |
| KR101472768B1 (en) | Method for checking of facility status with the number of vibrations of rotary machine | |
| McCoy et al. | How to maintain high producing efficiency in sucker rod lift operations | |
| CN101419242A (en) | Test method for critical speed of centrifugal pump and test device thereof | |
| CN217006339U (en) | Underground working condition testing system for submersible motor unit | |
| CN113738346B (en) | Method and device for obtaining dynamic liquid level depth of thick oil well | |
| CN113357167B (en) | Electrical submersible pump well abnormity diagnosis method based on double-suppressed pressure curve | |
| CN114033338B (en) | Device and method for testing self-priming pressure of underground screw pump of coal bed methane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |