CN116163686A - Boosting lifting pipe column - Google Patents
Boosting lifting pipe column Download PDFInfo
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- CN116163686A CN116163686A CN202111413594.5A CN202111413594A CN116163686A CN 116163686 A CN116163686 A CN 116163686A CN 202111413594 A CN202111413594 A CN 202111413594A CN 116163686 A CN116163686 A CN 116163686A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/124—Adaptation of jet-pump systems
Abstract
The embodiment of the application discloses pressure boost lift tubular column, this pressure boost lift tubular column includes: the lifting pipe column body comprises an upper pump cavity and a lower pump cavity; the jet flow assembly is arranged in the pump lower cavity, and the output end of the jet flow assembly faces the pump upper cavity; and the channel is communicated with the upper cavity of the pump and the output end of the jet flow assembly. The part of liquid in the upper cavity of the pressurized lifting pipe column pump can be conveyed to the jet flow assembly through the pipeline, the part of liquid can be pressurized through the jet flow assembly, the pressurized liquid and the well bottom liquid are mixed and sucked into the lower cavity of the pump, the suction pressure of the lower cavity of the pump is improved, and the suspension point load can be effectively reduced and the overall pump efficiency of the lifting system can be improved.
Description
Technical Field
The embodiment of the application relates to the technical field of oil reservoir exploitation, in particular to a pressurizing lifting pipe column.
Background
In the technical field of oil reservoir exploitation, as the thin oil block of an oil field is developed into the middle and later stages, the stratum energy loss is serious, the stratum energy loss cannot be compensated by the conventional water drive oil extraction, the liquid supply capacity of an oil well is poor, the number of low-liquid-level oil extraction wells is increased year by year, and higher requirements are provided for the oil well lifting process in the aspects of improving the production pump efficiency and increasing the system efficiency.
In the surface lifting equipment currently operated by the oil field, the pumping unit still has irreplaceability. Due to the continuous decrease of the working fluid level of the oil well in actual production of the oil field, a lifting scheme for further increasing the pumping depth is generally adopted on site to obtain enough oil well sinking. However, most pumping units in the actual field cannot provide higher lifting force. And the sinking degree is increased, so that the sucker rod column is increased, the deformation of the sucker rod column is increased, the load of the polish rod is increased, and the technical problem that the pump efficiency is influenced due to the increase of stroke loss is solved. Thus, the thin oil wells of more and more low-hole low-permeability blocks gradually lose the production capacity along with the reduction of the liquid level, so that the well is shut down and production is stopped, and the implementation of the integral development scheme of the oil field is seriously influenced.
Taking Liaohe oil field as an example, the Liaohe oil field oil reservoir geological structure has the characteristics of more faults and more fault blocks. The reservoir edge reservoir is small in thickness and unstable in distribution. The thin oil reservoir is mainly low-pore hypotonic, the permeability of the reservoir is generally less than 50md, the porosity is less than 10%, and the fluid seepage resistance of the reservoir is high. Therefore, the exploitation of a low-hole low-permeability thin oil block is usually accompanied with the technical problems of low pumping efficiency (less than 30 percent), low system efficiency (less than 20 percent) and the like of the oil well lifting caused by large bottom hole flow pressure fluctuation and insufficient sinking degree.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
In view of this, an embodiment of the present application provides a booster lifting column, including:
the lifting pipe column body comprises an upper pump cavity and a lower pump cavity;
the jet flow assembly is arranged in the pump lower cavity, and the output end of the jet flow assembly faces the pump upper cavity;
and the channel is communicated with the upper cavity of the pump and the output end of the jet flow assembly.
In a possible embodiment, the lifting column body comprises:
a sand setting outer tube;
and the pump cylinder is arranged in the sand setting outer pipe.
In a possible embodiment, the lifting column body further comprises:
the plunger assembly is arranged in the pump cylinder;
the first movable valve is arranged on one side, far away from the plunger assembly, of the pump barrel, and the region where the first movable valve and the plunger assembly are located in the sand setting outer tube is the upper pump chamber.
In one possible embodiment, the booster lift string further comprises:
and the centralizer is arranged between the pump cylinder and the sand setting outer pipe.
In one possible embodiment, the booster lift string further comprises:
the pump cylinder is made of steel, and a plating layer is arranged on the surface of the pump cylinder and made of chromium.
In a possible embodiment, the lifting column body further comprises:
the fixed valve is arranged in the sand setting outer pipe.
In a possible embodiment, the lifting column body further comprises:
the sand control screen pipe is connected with the fixed valve;
the sand settling cylinder is arranged in the sand control screen pipe and connected with the fixed valve, and the area where the fixed valve and the sand settling cylinder are positioned is a pump lower cavity.
In a possible embodiment, the lifting column body further comprises:
the second movable valve is arranged at one end of the plunger assembly, which is far away from the first movable valve.
In one possible embodiment, the jet assembly comprises:
a diffusion pipe connected to the fixed valve;
one end of the throat pipe is connected with the diffusion pipe;
one end of the nozzle is connected to the other end of the throat pipe, the channel is formed between the sand setting outer pipe and the pump cylinder, and the channel is communicated with the nozzle;
the liquid inlet valve is arranged at one end of the nozzle far away from the diffusion pipe;
when the lifting pipe column body is in an upward stroke, the first movable valve and the second movable valve are closed, the liquid inlet valve and the fixed valve are opened, part of liquid in the upper pump chamber is output through the lifting pipe column body, the other part of liquid is conveyed to the nozzle through the channel, and the lower pump chamber adsorbs the liquid; when the lifting pipe column body is in a down stroke, the first movable valve and the second movable valve are opened, the liquid inlet valve and the fixed valve are closed, and liquid in the lower pump cavity is conveyed to the upper pump cavity.
In one possible embodiment, the jet assembly comprises:
the sealing piece is arranged at the joint of the throat pipe and the diffusion pipe;
the upper end nozzle is sleeved outside the nozzle;
the upper-section nozzle is connected with the nozzle, and part of the upper-section nozzle is positioned on the inner side of the upper-end nozzle;
the nozzle sleeve is sleeved on the outer side of the upper end nozzle.
In one possible embodiment, the jet assembly further comprises:
and one end of the liquid inlet connector is connected with the nozzle sleeve, the other end of the liquid inlet connector is connected with the liquid inlet valve, and the liquid inlet connector is communicated with the channel.
In a possible embodiment, a gap is left between the nozzle and the throat, and the length of the gap is 0.5 to 1.5 times of the diameter of the nozzle;
the diffusion tube is of a three-stage diffusion structure.
In a possible embodiment, the diameter of the nozzle is determined based on the expected amount of liquid supplied by the channel to the jet assembly.
In one possible embodiment, the diameter of the nozzle is determined based on the following formula:
Q＝0.5*2.1*d 2 *(p 1 -p 3 ) 1/2
wherein Q is the jet flow of the nozzle; d is the diameter of the nozzle, and p1 is the upper liquid column pressure; p3 is the bottom hole flow pressure.
In one possible embodiment, the nozzle to throat area ratio of the jet assembly is determined based on the diameter of the nozzle and the jet pump characteristic curve.
Compared with the prior art, the invention at least comprises the following beneficial effects: according to the pressurizing lifting pipe column, in the actual use process, when the pressurizing lifting pipe column is in the upstroke, liquid in the upper pump cavity is lifted by the lifting pipe column body, the pumping unit can pump liquid in the upper pump cavity away from the pressurizing lifting pipe column, part of liquid in the upper pump cavity can be conveyed to the jet flow assembly through the pipeline, the part of liquid can be pressurized through the jet flow assembly, the pressurized liquid is mixed with bottom hole liquid and sucked into the lower pump cavity, the suction pressure of the lower pump cavity is improved, the adsorption quantity of liquid in the lower pump cavity is increased, and the effects of suspending point load and overall pump efficiency of a lifting system can be effectively reduced. When the pressurizing lifting pipe column is in a down stroke, liquid in the lower cavity of the pump can enter the upper cavity of the pump, and the bottom hole liquid can be pumped to the well along with the cyclic work of the pressurizing lifting pipe column between the up stroke and the down stroke, so that the exploitation of an oil reservoir is completed.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic block diagram of a booster lift string according to one embodiment provided herein;
FIG. 2 is a schematic block diagram of a jet assembly of a pressurized lift string according to one embodiment provided herein.
The correspondence between the reference numerals and the component names in fig. 1 and 2 is:
1 lifting a tubular column body, 2 jet flow components and 3 channels;
the sand setting device comprises a sand setting outer pipe 101, a pump cylinder 102, a plunger assembly 103, a first movable valve 104, a fixed valve 105, a sand control screen 106, a sand setting cylinder 107, a second movable valve 108, a diffusion pipe 201, a throat 202, a nozzle 203, a liquid inlet valve 204, a sealing element 205, an upper nozzle 206, an upper nozzle 207, a nozzle sleeve 208 and a liquid inlet joint 209.
Detailed Description
In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present application are described in detail below through the accompanying drawings and the specific embodiments, and it should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, and not limit the technical solutions of the present application, and the embodiments of the present application and the technical features in the embodiments of the present application may be combined with each other without conflict.
As shown in fig. 1 and 2, an embodiment of the present application provides a booster lifting column, including: the lifting pipe column comprises a lifting pipe column body 1, wherein the lifting pipe column body 1 comprises an upper pump chamber and a lower pump chamber; the jet flow assembly 2 is arranged in the lower pump cavity, and the output end of the jet flow assembly 2 faces to the upper pump cavity; and a channel 3 communicated with the upper chamber of the pump and the output end of the jet flow assembly 2.
According to the pressurizing lifting pipe column, in the actual use process, when the pressurizing lifting pipe column is in the upstroke, liquid in the upper pump cavity is lifted by the lifting pipe column body 1, the pumping unit can pump liquid in the upper pump cavity away from the pressurizing lifting pipe column, part of high-pressure liquid in the upper pump cavity can be conveyed to the jet assembly 2 through the pipeline, the part of high-pressure liquid can be pressurized through the jet assembly 2, pressurized liquid and bottom hole liquid are mixed and sucked into the lower pump cavity, suction pressure of the lower pump cavity is improved, and then adsorption quantity of liquid in the lower pump cavity is increased, so that suspension point load can be effectively reduced, and the effect of the whole pump efficiency of the lifting system is improved. When the pressurizing lifting pipe column is in a down stroke, liquid in the lower cavity of the pump can enter the upper cavity of the pump, and the bottom hole liquid can be pumped to the well along with the cyclic work of the pressurizing lifting pipe column between the up stroke and the down stroke, so that the exploitation of an oil reservoir is completed.
As shown in fig. 1, in some examples, the lifting column body 1 includes: a sand setting outer tube 101; a pump cylinder 102 disposed in the sand setting outer tube 101; a plunger assembly 103, a portion of the plunger assembly 103 being disposed within the pump barrel 102; the first movable valve 104 is arranged on one side of the pump cylinder 102 far away from the plunger assembly 103, and the area where the first movable valve 104 and the plunger assembly 103 are positioned in the sand setting outer pipe 101 is a pump upper chamber.
The lifting pipe column body 1 comprises a sand setting outer pipe 101, a pump cylinder 102, a plunger assembly 103 and a first movable valve 104, the lifting pipe column integrally moves towards the uphole direction in the lifting process of the lifting pipe column body 1, the first movable valve 104 receives force towards the downhole direction due to the action of inertia and resistance, the first movable valve 104 is in a closed state, liquid in the upper pump cavity can be lifted under the condition, and the liquid in the upper pump cavity can be conveyed to the uphole through the reciprocating suction of the plunger assembly 103. Through the setting of pump cylinder 102 and sand setting outer tube 101, can form passageway 3 between pump cylinder 102 and the sand setting outer tube 101, the partial liquid in the pump upper chamber passes through the pipeline and carries to jet module 2 to increase bottom hole suction pressure, the mixed suction of pressurized liquid and bottom hole liquid is in the cavity under the pump, has increased the suction pressure of cavity under the pump, and then has increased the adsorption capacity of the interior liquid of cavity under the pump, can effectively reduce the suspension point load and improve the effect of lifting system whole pump efficiency.
When the lifting column body 1 is in the down stroke, the first movable valve 104 receives force in the uphole direction, the first movable valve 104 is in the open state, and the liquid in the pump lower chamber can enter the pump upper chamber.
In some examples, the grit outer tube substrate is 45 gauge steel, the substrate thickness is 6-6.5mm, the pump barrel 102 substrate is 45 gauge steel, the inner working surface treatment mode is surface chromium plating treatment, and the chromium plating treatment layer thickness is 0.09-0.11mm.
In some examples, the pump assembly employs a long plunger short pump barrel 102 with a sand setting structure design. For the lifting of a thin oil well, in order to ensure effective sealing between the pump cylinder 102 and the plunger in a working state, the length of a sealing section of the plunger is designed to be 1500mm, so that the clearance sealing requirement between the pump cylinder 102 and the plunger assembly 103 can be met.
In some examples, the booster lift string further comprises: a centralizer arranged between the pump cylinder 102 and the sand setting outer tube 101; the pump cylinder 102 is made of steel, and the surface of the pump cylinder 102 is provided with a plating layer made of chromium.
The booster lift string further includes: the centralizer, through setting up of centralizer make the concentric effect of pump cylinder 102 and sand setting outer tube 101 better, set up the stability that the annular space can be ensured to the centralizer between sand setting outer tube and the pump cylinder 102, pump cylinder 102 is made by steel, and the surface of pump cylinder 102 is provided with the cladding material and can improves the life and the corrosion resistance of pump cylinder 102.
As shown in fig. 1, in some examples, the lifting string body 1 further comprises: a fixed valve 105 disposed in the sand setting outer pipe 101; a sand control screen 106 connected to the stationary valve 105; the sand settling cylinder 107 is arranged in the sand control screen 106 and connected with the fixed valve 105, and the areas where the fixed valve 105 and the sand settling cylinder 107 are positioned are pump down chambers.
The lifting pipe column body 1 further comprises a fixed valve 105, a sand control screen 106 and a sand setting cylinder 107, when the pressurizing lifting pipe column is in an upward stroke, the first movable valve 104 is in a closed state, the space of the lower pump cavity is gradually increased along with the movement of the upper pump cavity component, under the condition, the fixed valve 105 is in an open state, part of liquid in the upper pump cavity is conveyed to the jet component 2, the suction pressure of the lower pump cavity is increased after the liquid passes through the jet component 2, and more liquid can be sucked into the lower pump cavity under the action of pressure difference. When the booster lift string is in the down stroke, as the components in the upper chamber of the pump move, the space in the lower chamber is compressed, the first movable valve 104 is in the open state, the fixed valve 105 is in the closed state, and the liquid in the lower chamber enters the upper chamber.
Considering that the nozzles 203 of the jet assembly 2 are easily blocked, a sand settling channel can be formed by arranging the sand control screen 106 and the sand settling cylinder 107, settled sand in a lower cavity of the pump can be discharged, and the probability of blocking the nozzles 203 is reduced.
In some examples, the ball and seat of the fixed valve 105 are made of cemented tungsten carbide, which improves the resistance of the fixed valve 105 assembly to fluid erosion.
As shown in fig. 1, in some examples, the lifting string body 1 further comprises: the second movable valve 108 is disposed at an end of the plunger assembly 103 facing away from the first movable valve 104.
The lifting pipe column body 1 further comprises a second movable valve 108, in the process that the pressurizing lifting pipe column is in an upstroke, the first movable valve 104 and the second movable valve 108 can be subjected to force towards the underground direction, the first movable valve 104 and the second movable valve 108 are in a closed state, and liquid in the upper cavity of the pump can be pumped out through reciprocating suction of the plunger assembly 103 under the condition. During the down stroke of the booster lift string, both the first and second movable valves 104, 108 are open and fluid in the lower pump chamber enters the upper pump chamber.
As shown in fig. 2, in some examples, the jet assembly 2 includes: a diffuser 201 connected to the fixed valve 105; a throat 202, one end of the throat 202 being connected to the diffuser 201; a nozzle 203, one end of the nozzle 203 is connected to the other end of the throat 202, a channel 3 is formed between the sand setting outer tube 101 and the pump cylinder 102, and the channel 3 is communicated with the nozzle 203; a liquid inlet valve 204 disposed at one end of the nozzle 203 remote from the diffuser 201; when the lifting pipe column body 1 is in an upward stroke, the first movable valve 104 and the second movable valve 108 are closed, the liquid inlet valve 204 and the fixed valve 105 are opened, part of liquid in the upper cavity of the pump is output through the lifting pipe column body 1, the other part of liquid is conveyed to the nozzle 203 through the channel 3, and the liquid is adsorbed in the lower cavity of the pump; when the lifting column body 1 is in the down stroke, the first movable valve 104 and the second movable valve 108 are opened, the liquid inlet valve 204 and the fixed valve 105 are closed, and the liquid in the pump lower chamber is conveyed to the conveying pump upper chamber.
The injection action of the liquid jet flow assembly 2 forms negative pressure to suck low-pressure stratum liquid, potential energy is exchanged in the throat 202 to boost pressure, and the suction pressure of a lower cavity of the pump is improved, so that the liquid adsorption capacity of the whole lifting pipe column is improved.
When the lifting pipe column body 1 is in an up stroke, the first movable valve 104 and the second movable valve 108 are closed, the liquid inlet valve 204 and the fixed valve 105 are opened, part of liquid in the upper cavity of the pump is output through the lifting pipe column body 1, the other part of liquid is conveyed to the nozzle 203 through the channel 3, the liquid sequentially passes through the throat 202 and the diffusion pipe 201 after entering the nozzle 203, and finally is discharged through the diffusion pipe 201, so that the pressurization of the liquid is realized, the pressurized liquid can be mixed with underground liquid, the effect of improving the pressure of the underground liquid is realized, further, the lower cavity of the pump adsorbs more liquid, and the pressurized lifting pipe column can output more liquid under the condition of the same stratum; when the lifting column body 1 is in the down stroke, the first movable valve 104 and the second movable valve 108 are opened, the liquid inlet valve 204 and the fixed valve 105 are closed, and the liquid in the pump lower chamber is conveyed to the conveying pump upper chamber.
As shown in fig. 2, in some examples, the jet assembly 2 includes: a seal 205 provided at the junction of the throat 202 and the diffuser 201; an upper nozzle 206 sleeved outside the nozzle 203; an upper nozzle 207 connected to the nozzle 203, a part of the upper nozzle 207 being located inside the upper nozzle 206; a nozzle sleeve 208 sleeved outside the upper nozzle 206; the liquid inlet connector 209, one end is connected to the nozzle sleeve 208, and the other end is connected to the liquid inlet valve 204, and the liquid inlet connector 209 is communicated with the channel 3.
The jet assembly 2 includes a seal 205, an upper nozzle 206, an upper nozzle 207, and a nozzle sleeve 208. The joint of the diffuser 201 and the throat 202 can be sealed by the sealing piece 205, so that leakage of liquid is avoided, and the supercharging effect can be ensured. The upper nozzle 206, the upper nozzle 207 and the nozzle sleeve 208 can be used for fixing the nozzle 203, so that the nozzle 203 can be miniaturized, the preparation of the nozzle 203 is facilitated, the design of fixing the nozzle 203 by the upper nozzle 206, the upper nozzle 207 and the nozzle sleeve 208 reduces the volume of the nozzle 203 in consideration of the most intense abrasion of the nozzle 203 in the actual production process, the nozzle 203 can be made of more expensive diamond, the upper nozzle 206, the upper nozzle 207 and the nozzle sleeve 208 can be made of relatively low-priced abrasion-resistant materials, and the arrangement can reduce the cost of the pressurizing and lifting pipe column while guaranteeing the service life of the pressurizing and lifting pipe column
In some examples, the nozzle 203 is made of polycrystalline diamond material, the throat 202 is made of corrosion-resistant hard alloy material, so that the erosion resistance strength of the nozzle 203 and the throat 202 is ensured, and brittle failure such as abrasion, fracture and the like of the jet valve assembly system in a long-term high-pressure jet working state is avoided. According to the design characteristics of the jet pressurizing technology, the jet valve assembly only works in the process of the upstroke. Since the operating flow rate of the jet valve assembly is the amount of pump leakage, in principle, the smaller the diameter of the nozzle 203, the better based on jet pump design criteria.
In one possible embodiment, a gap is left between the nozzle 203 and the throat 202, the length of the gap being 0.5 to 1.5 times the diameter of the nozzle 203; the diffuser 201 is a three-stage diffuser structure.
A gap is left between the nozzle 203 and the throat 202, and the gap is 0.5 to 1.5 times of the diameter of the nozzle 203, so that the pressurizing effect of the jet assembly 2 can be improved.
The diffusion tube 201 is of a three-stage diffusion structure, so that the pressurizing effect of the jet assembly 2 on liquid can be further guaranteed, and in some examples, the diffusion tube 201 can be of three-stage diffusion angles of 2 °, 4 ° and 13 °, so that the pressurizing effect of the jet assembly 2 can be better guaranteed.
In some examples, the diameter of nozzle 203 is determined based on the expected amount of liquid supplied by channel 3 to jet assembly 2.
In consideration of the fact that the amount of liquid supplied into the jet assembly 2 via the pump upper chamber needs to be reasonably controlled, if the amount of liquid supplied is too large, the pressurized lifting column can be drawn too little, so that the diameter of the nozzle 203 is determined by the amount of liquid supplied to the jet assembly 2 through the channel 3, and then the amount of liquid supplied to the nozzle 203 by the pump upper chamber can be controlled.
In some examples, the diameter of nozzle 203 is determined based on the following equation:
Q＝0.5*2.1*d 2 *(p 1 -p 3 ) 1/2
wherein Q is the jet flow rate of the nozzle 203; d is the diameter of nozzle 203, p1 is the upper column pressure; p3 is the bottom hole flow pressure.
The diameter of the nozzle 203 can be calculated and obtained through the above method, the selection of the nozzle 203 is facilitated, the liquid amount supplied to the nozzle 203 by the upper pump chamber can be controlled, the liquid output of the pressurizing lifting pipe column can be guaranteed through the arrangement, meanwhile, the liquid suction pressure of the lower pump chamber can be improved, and the liquid suction amount of the lower pump chamber of the lifting pipe column is further improved.
In some examples, the area ratio of nozzle 203 to throat 202 of jet assembly 2 is determined based on the diameter of nozzle 203 and the jet pump characteristic curve.
After the diameter of the nozzle 203 of the jet assembly 2 is determined, the area ratio of the nozzle 203 to the throat 202 can be determined through the diameter of the nozzle 203 and a jet pump characteristic curve, and then the specific model selection of the jet assembly 2 can be completed, so that the liquid output of the pressurizing lifting pipe column can be ensured, the liquid suction pressure of the lower pumping chamber can be improved, and the liquid suction amount of the lower pumping chamber of the lifting pipe column can be improved.
It can be appreciated that in the case of the conventional jet pump, under the condition of the same reynolds number, the typical value of the friction loss factor determined by goslinic and oblain is adopted to obtain the change relation of H-M and E-M when R takes different values:
M＝q 3 /q 1 (1)
R＝A j /A t (2)
H＝(p 2 -p 3 )/(p 1 -p 2 ) (3)
E＝MH (4)
wherein:
m is a dimensionless mass flow ratio; q 3 For the formation fluid production, m 3 /d；q 1 For the up-stroke nozzle 203 to operate with the shot-flow, m 3 /d；
R is the area ratio of the throat 202 of the nozzle 203; a is that j For nozzle 203 area, mm 2 ；A t For throat 202 area, mm 2 ；
H is dimensionless head ratio; p is p 1 The pressure is the pressure of the upper liquid column and MPa; p is p 2 Hydraulic pressure, MPa, for the diffuser 201; p is p 3 Is the bottom hole flow pressure, MPa;
e is jet pump efficiency.
According to the characteristic curve of the jet pump, the mixing pressure p can be calculated by the formula 3 through designing a reasonable R value 2 。
A new suction pressure is obtained: p is p 2 ＝(H*p 1 +p 3 )/(H+1)
The following pump depth 1600m, sinking 150m, adopting phi 44 oil pump, stroke 5m, 4 times per minute, jet pump nozzle 203 diameter d=1.2 mm, area ratio r=0.132 as an example:
theoretical spray per minute for nozzle 203Jet flow q=0.5×2.1×d 2 *(p 1 -p 3 )1/2＝5.7L/min；
Normal production is performed by using a common pump, and the suction inlet pressure p=1.5 MPa;
the jet pressurizing and lifting technology is adopted, the pressure head ratio H=0.14 can be obtained by the dimensionless curve of the jet pump, and the pressure p of the suction inlet is obtained 2 ＝(H*p 1 +p 3 )/(H+1)＝(0.14*16+1.5)÷(0.14+1)＝3.28MPa；
Simulation calculation is carried out through design software of the sucker rod pump, and the suction inlet pressure is respectively increased from 33% to 62% by taking the total pump efficiency of the systems of 1.5MPa and 3.28 MPa. Pump displacement increase q Variable ＝8.8L/min；
Total pump efficiency improvement = (Q-Q)/Q theory = (8.8-5.7)/(30.4=10.2%).
In summary, the pressurizing and lifting pipe column provided by the embodiment can be suitable for an oil well with an insufficient indicator diagram, and is used for achieving the effects of improving the pump efficiency, reducing the suspension point load and improving the physique on the premise of not changing the depth of the lower pump. The method can be suitable for intermittent well or production stopping well with sinking degree less than 100 meters, and can achieve the purpose of increasing the pumping depth without changing the lifting equipment of the ground pumping unit, so that reasonable yield is obtained, and continuous production of intermittent well and production stopping well is activated.
In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (15)
1. A booster lift string, comprising:
the lifting pipe column body comprises an upper pump cavity and a lower pump cavity;
the jet flow assembly is arranged in the pump lower cavity, and the output end of the jet flow assembly faces the pump upper cavity;
and the channel is communicated with the upper cavity of the pump and the output end of the jet flow assembly.
2. The pressurized lift column of claim 1, wherein said lift column body comprises:
a sand setting outer tube;
and the pump cylinder is arranged in the sand setting outer pipe.
3. The pressurized lift column of claim 2, wherein said lift column body further comprises:
the plunger assembly is arranged in the pump cylinder;
the first movable valve is arranged on one side, far away from the plunger assembly, of the pump barrel, and the region where the first movable valve and the plunger assembly are located in the sand setting outer tube is the upper pump chamber.
4. A booster lift column as defined in claim 3, further comprising:
and the centralizer is arranged between the pump cylinder and the sand setting outer pipe.
5. The booster lift column of claim 4, further comprising:
the pump cylinder is made of steel, and a plating layer is arranged on the surface of the pump cylinder and made of chromium.
6. The pressurized lift column of claim 5, wherein said lift column body further comprises:
the fixed valve is arranged in the sand setting outer pipe.
7. The pressurized lift column of claim 6, wherein said lift column body further comprises:
the sand control screen pipe is connected with the fixed valve;
the sand settling cylinder is arranged in the sand control screen pipe and connected with the fixed valve, and the area where the fixed valve and the sand settling cylinder are positioned is a pump lower cavity.
8. The pressurized lift column of claim 7, wherein said lift column body further comprises:
the second movable valve is arranged at one end of the plunger assembly, which is far away from the first movable valve.
9. The booster lift string of claim 8, wherein the jet assembly comprises:
a diffusion pipe connected to the fixed valve;
one end of the throat pipe is connected with the diffusion pipe;
one end of the nozzle is connected to the other end of the throat pipe, the channel is formed between the sand setting outer pipe and the pump cylinder, and the channel is communicated with the nozzle;
the liquid inlet valve is arranged at one end of the nozzle far away from the diffusion pipe;
when the lifting pipe column body is in an upward stroke, the first movable valve and the second movable valve are closed, the liquid inlet valve and the fixed valve are opened, part of liquid in the upper pump chamber is output through the lifting pipe column body, the other part of liquid is conveyed to the nozzle through the channel, and the lower pump chamber adsorbs the liquid; when the lifting pipe column body is in a down stroke, the first movable valve and the second movable valve are opened, the liquid inlet valve and the fixed valve are closed, and liquid in the lower pump cavity is conveyed to the upper pump cavity.
10. The booster lift string of claim 9, wherein the jet assembly comprises:
the sealing piece is arranged at the joint of the throat pipe and the diffusion pipe;
the upper end nozzle is sleeved outside the nozzle;
the upper-section nozzle is connected with the nozzle, and part of the upper-section nozzle is positioned on the inner side of the upper-end nozzle;
the nozzle sleeve is sleeved on the outer side of the upper end nozzle.
11. The booster lift string of claim 10, wherein the jet assembly further comprises:
and one end of the liquid inlet connector is connected with the nozzle sleeve, the other end of the liquid inlet connector is connected with the liquid inlet valve, and the liquid inlet connector is communicated with the channel.
12. The booster lift column of claim 11, wherein,
a gap is reserved between the nozzle and the throat, and the length of the gap is 0.5 to 1.5 times of the diameter of the nozzle;
the diffusion tube is of a three-stage diffusion structure.
13. The booster lift column of claim 9, wherein,
the diameter of the nozzle is determined based on the desired amount of liquid supplied by the channel to the jet assembly.
14. The pressurized lift column of claim 13, wherein the diameter of the nozzle is determined based on the formula:
Q＝0.5*2.1*d 2 *(p 1 -p 3 ) 1/2
wherein Q is the jet flow of the nozzle; d is the diameter of the nozzle, and p1 is the upper liquid column pressure; p3 is the bottom hole flow pressure.
15. The booster lift string of claim 9, wherein the nozzle to throat area ratio of the jet assembly is determined based on the diameter of the nozzle and the jet pump characteristic curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111413594.5A CN116163686A (en) | 2021-11-25 | 2021-11-25 | Boosting lifting pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111413594.5A CN116163686A (en) | 2021-11-25 | 2021-11-25 | Boosting lifting pipe column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116163686A true CN116163686A (en) | 2023-05-26 |
Family
ID=86410137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111413594.5A Pending CN116163686A (en) | 2021-11-25 | 2021-11-25 | Boosting lifting pipe column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116163686A (en) |
-
2021
- 2021-11-25 CN CN202111413594.5A patent/CN116163686A/en active Pending
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