CN109695596B

CN109695596B - Hydraulic jet pump

Info

Publication number: CN109695596B
Application number: CN201710992385.8A
Authority: CN
Inventors: 王存博; 任桂山; 徐国安; 马先平; 方睿
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2017-10-23
Filing date: 2017-10-23
Publication date: 2020-04-10
Anticipated expiration: 2037-10-23
Also published as: CN109695596A

Abstract

The invention belongs to the technical field of oil and gas field exploitation processes, and particularly relates to a hydraulic jet pump. The hydraulic jet pump comprises a pump core, a pump barrel, a nozzle, a flow guide seat and a spiral body, the spiral body is arranged in a first cavity of the pump core, so that the spiral body is fixed in the pump core, when high-pressure fluid flows into the first cavity from the second through hole at the upper part of the pump core and contacts the spiral surface of the spiral body, high-pressure fluid is spirally accelerated and then is ejected out of the first cavity from the nozzle to eject swirling jet flow, since the surface turbulence of the swirling jet stream is greater than the apparent turbulence of the linear turbulent jet stream, therefore, the swirling jet flow stream has stronger liquid carrying capacity, and is mixed with the formation liquid flowing in from the liquid inlet channel arranged at the lower part of the pump core, more formation liquid can be carried by high-pressure fluid to flow out from a liquid outlet channel arranged at the lower part of the pump core, and finally flows out of the pump through a third through hole in the wall of the pump barrel, so that the liquid carrying effect of the pump is enhanced.

Description

Hydraulic jet pump

Technical Field

The invention belongs to the technical field of oil and gas field exploitation processes, and particularly relates to a hydraulic jet pump.

Background

In the oil extraction process of the current oil field, a pump is needed to be used for injecting the formation liquid to the ground, and the currently used pump comprises a plunger pump, a screw pump, an oil-submersible pump, a hydraulic jet pump and the like. The hydraulic jet pump has the advantages of large discharge capacity, convenient operation and the like, and occupies an important position in the existing oil exploitation.

The hydraulic jet pump that uses among the prior art comprises pump barrel and pump core, and the pump core setting is provided with nozzle, water conservancy diversion seat and diffusion tube in the pump core in the pump barrel, and its theory of operation is: high-pressure power liquid enters the pump cylinder, enters the pump core from a liquid inlet at the upper end of the pump core, is sprayed out through the nozzle to form high-speed jet flow, a local low-pressure area is formed at the jet flow position, formation liquid enters the periphery of the jet flow through the through holes on the flow guide seat, the high-pressure power liquid and the formation liquid are mixed due to transverse turbulence of jet flow particles and flow into the diffusion tube together, the flow velocity of the mixed liquid is reduced along with the gradual expansion of the diffusion tube, the pressure is increased, and finally the mixed liquid is discharged out of the pump from an oil outlet formed in the wall of the pump cylinder.

In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:

a nozzle of a hydraulic jet pump used in the prior art adopts a circular guide pipe, jet flow of high-pressure power liquid passing through the nozzle is linear turbulent jet flow, and the liquid carrying capacity of the linear turbulent jet flow is not strong, so that the liquid carrying effect of the pump of the hydraulic jet pump is influenced.

Disclosure of Invention

In view of this, the present invention provides a hydraulic jet pump, which utilizes swirling jet flow to improve the liquid carrying capacity of jet flow and enhance the liquid carrying effect of the hydraulic jet pump.

Specifically, the method comprises the following technical scheme:

a hydrajetting pump, comprising: a pump core, a pump barrel, a nozzle, a flow guide seat and a spiral body, wherein,

the pump core is arranged in the pump cylinder;

the pump core is internally provided with a first cavity, the spiral body, the nozzle and the flow guide seat are arranged in the first cavity from top to bottom, the spiral body is connected with the pump core, the nozzle is arranged on the inner wall of the pump core, the flow guide seat is arranged at a nozzle opening of the nozzle, the flow guide seat is provided with a first through hole, and the first through hole is communicated with the nozzle;

a second through hole is formed in the upper part of the pump core and communicated with the first cavity;

a liquid inlet channel is formed in the lower portion of the pump core and is communicated with the first through hole and the pump barrel; a liquid outlet channel is also formed in the lower part of the pump core and is communicated with the nozzle;

and a third through hole is formed in the wall of the pump barrel and communicated with the liquid outlet channel.

Further, the hydraulic jet pump also comprises a first one-way valve, and the first one-way valve is arranged in the first cavity and is positioned between the spiral body and the pump core.

Furthermore, a first lug is arranged on the outer wall of the first one-way valve, a first limit groove is formed in the inner wall of the pump core, and the first lug is movably arranged in the first limit groove.

Furthermore, a second bump is arranged on the outer wall of the pump core, a second limiting groove is formed in the inner wall of the pump barrel, and the second bump is movably arranged in the second limiting groove.

Further, the first check valve is a shuttle check valve.

Furthermore, the hydraulic jet pump also comprises a throat body diffusion pipe, wherein the throat body diffusion pipe is arranged on the inner wall of the pump core and is positioned at the lower part of the flow guide seat.

Further, the hydraulic jet pump also comprises a second one-way valve, and the second one-way valve is arranged in the pump cylinder and is connected with the lower part of the pump core.

Further, the second check valve is a check valve with a round chamfer angle at the bottom edge.

Further, the third through holes are inclined upward through holes, and the number of the third through holes is 1-4.

Further, the hydraulic jet pump also comprises a third one-way valve, and the third one-way valve is connected with the pump cylinder and is positioned at the lower part of the pump cylinder.

The technical scheme provided by the embodiment of the invention has the beneficial effects that:

the hydraulic jet pump of the embodiment of the invention arranges the spiral body in the first cavity of the pump core, so that the spiral body is fixed in the pump core, when the high-pressure fluid flows into the first cavity from the second through hole at the upper part of the pump core and then contacts with the spiral surface of the spiral body, the high-pressure fluid is spirally accelerated and then is ejected out of the first cavity from the nozzle, the ejected fluid stream is turbulent jet stream moving forwards in rotation, namely, swirling jet stream, because the surface turbulence of the swirling jet stream is stronger than the surface turbulence of the linear turbulent jet stream, the liquid carrying capacity of the swirling jet stream is stronger, and more formation liquid can be carried by the swirling jet stream and flows out from the liquid outlet channel arranged at the lower part of the pump core by the high-pressure fluid and finally flows out of the pump through the third through hole on the wall of the pump cylinder, the liquid carrying effect of the pump is enhanced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a sectional view of a configuration of a hydrajet pump according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating a pump barrel assembly of a hydrajet pump according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating the installation of a core of a hydrajet pump according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a first cylinder of a hydraulic jet pump according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is a schematic cross-sectional view taken along line B-B of FIG. 4;

FIG. 7 is a schematic structural diagram of a second cylinder of a hydrajet pump according to an embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view taken along line A-A of FIG. 7;

FIG. 9 is a schematic cross-sectional view taken along line B-B of FIG. 7;

FIG. 10 is a schematic structural view of a third check valve of the hydrajet pump according to an embodiment of the present invention;

FIG. 11 is a schematic cross-sectional view taken along line A-A of FIG. 10;

FIG. 12 is a schematic cross-sectional view taken along line B-B of FIG. 10;

FIG. 13 is a schematic cross-sectional view taken along line A1-A1 of FIG. 10;

FIG. 14 is a schematic cross-sectional view taken along line A2-A2 of FIG. 10;

FIG. 15 is a schematic structural diagram of a first core of a hydrajet pump according to an embodiment of the present invention;

FIG. 16 is a schematic cross-sectional view taken along line A1-A1 of FIG. 15;

FIG. 17 is a schematic cross-sectional view taken along line A2-A2 of FIG. 15;

FIG. 18 is a schematic cross-sectional view taken along line B-B of FIG. 15;

FIG. 19 is a schematic structural view of a first check valve and a spiral of a hydraulic jet pump according to an embodiment of the present invention;

FIG. 20 is a schematic cross-sectional view taken along line A1-A1 of FIG. 19;

FIG. 21 is a schematic cross-sectional view taken along line A2-A2 of FIG. 19;

FIG. 22 is a schematic cross-sectional view taken along line B-B of FIG. 19;

FIG. 23 is a schematic structural view of a second core of a hydrajet pump according to an embodiment of the present invention;

FIG. 24 is a schematic cross-sectional view taken along line A-A of FIG. 23;

FIG. 25 is a schematic cross-sectional view taken along line B-B of FIG. 23;

FIG. 26 is a schematic structural view of a nozzle of a hydrajet pump according to an embodiment of the present invention;

FIG. 27 is a schematic cross-sectional view taken along line A-A of FIG. 26;

FIG. 28 is a schematic cross-sectional view taken along line B-B of FIG. 26;

fig. 29 is a schematic structural view of a guide seat of a hydraulic jet pump according to an embodiment of the present invention;

FIG. 30 is a schematic cross-sectional view taken along line A-A of FIG. 29;

FIG. 31 is a schematic cross-sectional view taken along line B-B of FIG. 29;

FIG. 32 is a schematic diagram of a throat diffuser of a hydrajet pump according to an embodiment of the present invention;

FIG. 33 is a schematic cross-sectional view taken along line A-A of FIG. 32;

FIG. 34 is a schematic cross-sectional view taken along line B-B of FIG. 32;

FIG. 35 is a schematic structural diagram of a third core of a hydrajet pump according to an embodiment of the present invention;

FIG. 36 is a schematic cross-sectional view taken along line A1-A1 of FIG. 35;

FIG. 37 is a schematic cross-sectional view taken along line A2-A2 of FIG. 35;

FIG. 38 is a schematic structural view of a second check valve of a hydrajet pump according to an embodiment of the present invention;

FIG. 39 is a schematic cross-sectional view taken along line A-A in FIG. 38;

FIG. 40 is a schematic cross-sectional view taken along line B-B of FIG. 38;

FIG. 41 is a schematic cross-sectional view taken along line A1-A1 of FIG. 38;

FIG. 42 is a schematic cross-sectional view taken along line A2-A2 in FIG. 38.

The reference numerals in the figures are denoted respectively by:

1. a pump core;

101. a first cavity;

102. a second through hole;

103. a liquid inlet channel;

104. a liquid outlet channel;

105. a first limit groove;

106. a second bump;

107. a second cavity;

108. a fourth via hole;

109. a fifth through hole;

110. a sixth through hole;

111. a seventh via hole;

2. a pump barrel;

201. a third through hole;

202. a second limit groove;

203. an annular space;

3. a nozzle;

4. a flow guide seat;

401. first through hole

5. A helical body;

501. spiraling;

502. connecting columns;

6. a first check valve;

602. a first overflow aperture;

601. a first bump;

7. a third check valve;

701. a second sphere;

702. a second valve seat;

703. a third overflowing hole;

8. a throat diffuser;

9. a second one-way valve;

901. a first sphere;

902. a first valve seat;

903. a second overflowing hole;

10. a first seal ring;

11. a second seal ring;

1-1, a first core;

1-2, a second core;

1-3, a third core;

2-1, a first cylinder;

2-2 and a second cylinder.

Detailed Description

In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings.

The embodiment of the invention provides a hydraulic jet pump, the structural schematic diagram of which is shown in fig. 1, and the hydraulic jet pump comprises a pump core 1, a pump cylinder 2, a nozzle 3, a flow guide seat 4 and a spiral body 5, wherein,

the pump core 1 is arranged in the pump barrel 2;

a first cavity 101 is formed in the pump core 1, the spiral body 5, the nozzle 3 and the flow guide seat 4 are arranged in the first cavity 101 from top to bottom, the spiral body 5 is connected with the pump core 1, the nozzle 3 is arranged on the inner wall of the pump core 1, the flow guide seat 4 is arranged at the nozzle opening of the nozzle 3, the flow guide seat 4 is provided with a first through hole 401, and the first through hole 401 is communicated with the nozzle 3;

the upper part of the pump core 1 is provided with a second through hole 102, and the second through hole 102 is communicated with the first cavity 101;

the lower part of the pump core 1 is provided with a liquid inlet channel 103, and the liquid inlet channel 103 is communicated with the first through hole 401 and the pump barrel 2; the lower part of the pump core 1 is also provided with a liquid outlet channel 104, and the liquid outlet channel 104 is communicated with the nozzle 3;

the wall of the pump barrel 2 is provided with a third through hole 201, and the third through hole 201 is communicated with the liquid outlet channel 104.

Specifically, in the hydraulic jet pump according to the embodiment of the present invention, the liquid inlet channel 103 may include a second cavity 107 and a fourth through hole 108 which are communicated with each other, and the formation liquid may first pass through the second cavity 107 and enter the fourth through hole 108, as shown in fig. 1 or fig. 35, wherein the number of the fourth through holes 108 is 1 to 3, and the number of the fourth through holes 108 is specifically set according to actual conditions in the field, and preferably, a cross-sectional view taken along a line a1-a1 from the position of the liquid inlet channel 103 is shown in fig. 36, and a cross-sectional view a2-a2 from the position of the liquid inlet channel 103 is shown in fig. 37, and the number of the fourth through holes 108 is 3; the liquid outlet channel 104 can comprise a fifth through hole 109, a sixth through hole 110 and an annular space 203 which are communicated with each other, as shown in fig. 1, wherein the annular space 203 is a space formed between the outer wall of the pump core 1 and the inner wall of the pump barrel 2, the number of the sixth through holes 110 is 1-3, the number of the sixth through holes 110 is also specifically set according to the time situation of the site, and preferably, the cross-sectional view of the liquid outlet channel 104 along the line A2-A2 is shown in fig. 37, and the number of the sixth through holes 110 is 3.

It should be noted that the structure of the spiral body 5 is shown in fig. 22, the spiral 501 is spirally wound on the connecting column 502, and the structure of the section a2-a2 is shown in fig. 21, so as to facilitate the liquid passing through the spiral body 5.

The following explains the working principle of the hydraulic jet pump provided by the embodiment of the present invention:

in the using process, firstly, the pump cylinder 2 of the hydraulic jet pump of the embodiment of the invention is put into a well bore together with an oil pipe, so that the whole pump cylinder 2 is immersed in the formation fluid of the well bore;

secondly, the pump core 1 is put in, so that the pump core 1 moves towards the pump cylinder 2 under the action of the gravity of the pump core 1;

thirdly, injecting high-pressure fluid into the well bore to enable the pump core 1 to enter the pump cylinder 2;

finally, high-pressure fluid is continuously injected into the shaft, when the high-pressure fluid flows into the pump barrel 2 from top to bottom, the high-pressure fluid continuously goes downwards to flow into the first cavity 101 from the second through hole 102 in the upper part of the pump core 1 and further contacts the spiral surface of the spiral body 5, and the high-pressure fluid is accelerated by the spiral body 5 and then is ejected out of the first cavity 101 from the nozzle 3 to form a rotating jet flow stream; meanwhile, as the pump barrel 2 is immersed in the formation liquid, the formation liquid can enter the liquid inlet channel 103 formed at the lower part of the pump core 1 from the pump barrel 2 and flow into the first through hole 401 formed in the diversion seat 4 through the liquid inlet channel 103; at the nozzle opening of the nozzle 3, the rotating jet flow stream flowing out from the nozzle 3 is mixed with the formation liquid flowing out from the first through hole 401, and under the carrying action of the rotating jet flow stream, the formation liquid is carried to flow out from the liquid outlet channel 104 arranged at the lower part of the pump core 1 and finally flows out of the pump through the third through hole 201 arranged on the wall of the pump barrel 2.

Therefore, the hydraulic jet pump of the embodiment of the invention utilizes the pump core 1, the pump cylinder 2, the nozzle 3, the guide seat 4 and the spiral body 5 to form a rotating jet flow stream when high-pressure fluid flows into the pump, the surface turbulence of the rotating jet flow stream is stronger than the surface turbulence of a straight line turbulent jet flow stream, so that the liquid carrying capacity of the rotating jet flow stream is stronger, more formation liquid can be carried by the high-pressure fluid to be pumped out of the pump by mixing the rotating jet flow stream with the formation liquid, and the liquid carrying effect of the pump is enhanced.

In the hydraulic jet pump of the embodiment of the present invention, structurally, for the pump core 1, the pump core 1 may include a first core 1-1, a second core 1-2 and a third core 1-3 connected to each other, the first core 1-1 is schematically shown in fig. 15, and the first core 1-1 is located at an upper portion of the pump core 1; the second core 1-2 is hollow inside, as shown in fig. 23 or fig. 24 or fig. 25, wherein fig. 23 is a structural view of the second core 1-2, fig. 24 is a sectional view taken along line a-a in fig. 23, and fig. 25 is a sectional view taken along line B-B in fig. 23; the first check valve 6 and the spiral body 5 are arranged in the first core body 1-1 and the second core body 1-2, preferably, the first check valve 6 and the spiral body 5 are of an integral structure, as shown in fig. 19, and the first check valve 6 is connected with the first core body 1-1 through a buckle; the structure of the third core 1-3 is schematically shown in fig. 35, the third core 1-3 is located at the lower part of the pump core 1, the third core 1-2 comprises a liquid inlet channel 103, a fifth through hole 109 and a sixth through hole 110, and the nozzle 3, the guide seat 4 and the throat diffuser 8 are sequentially arranged between the second core 1-2 and the third core 1-3 from top to bottom.

It should be noted that the nozzle 3 is a cylindrical long conduit nozzle with a hollow interior, and the schematic structural diagram thereof is shown in fig. 26, the schematic sectional diagram thereof taken along line B-B is shown in fig. 28, and the schematic sectional diagram thereof taken along line a-a can be seen from fig. 27, which shows that the caliber of the nozzle opening of the nozzle 3 is much smaller than the caliber of the upper inlet, so that the pressure of the high-pressure liquid passing through the nozzle opening of the nozzle 3 is increased, and the high-pressure liquid is convenient to carry more formation liquid when being sprayed out from the nozzle opening of the nozzle 3.

When the pump core 1 of the hydraulic jet pump of the embodiment of the present invention is installed, as shown in fig. 3, the first check valve 6 and the spiral body 6 connected to each other are first installed in the first core 1-1, secondly, the second core body 1-2 is screwed with the lower part of the first core body 1-1 in a thread way, the nozzle 3 and the guide seat 4 are installed into the second core body 1-2 upwards, the throat diffusion pipe 8 is downwards arranged in the third core body 1-3, then the third core body 1-3 provided with the throat diffusion pipe 8 is upwards screwed to the lower part of the second core body 1-2, then the valve body of the second check valve 9 is screwed up and left to the lower part of the third core 1-3, the first ball 901 is fitted up into the valve body, and finally the first valve seat 902 is screwed up and right to the lower part of the valve body.

In the hydraulic jet pump according to the embodiment of the present invention, for the pump barrel 2, the pump barrel 2 includes a first barrel 2-1 and a second barrel 2-2, and a second limiting groove 202 is formed inside the first barrel 2-1, as shown in fig. 4, preferably, a cross-sectional view of the first barrel 2-1 taken along a line a-a is shown in fig. 5, a cross-sectional view of the first barrel 2-1 taken along a line B-B is shown in fig. 6, the number of the second limiting grooves 202 is 4, and the second limiting grooves are uniformly arranged on the inner wall of the first barrel 2-1, and correspondingly, the number of the second protrusions 106 formed on the outer wall of the first core 1-1 is also 4, as shown in fig. 17; the second cylinder 2-2 is hollow inside, and as can be seen from the structural schematic diagram of fig. 7 or the sectional schematic diagram of fig. 8 taken along the line a-a or the sectional schematic diagram of fig. 9 taken along the line B-B, the upper part of the second cylinder 2-2 is connected with the lower part of the first cylinder 2-1, and the lower part of the second cylinder 2-2 is connected with the third check valve 7.

When the pump barrel 2 of the hydrajetting pump according to the embodiment of the present invention is installed, the installation schematic diagram is shown in fig. 2, the first cylinder 2-1 is screwed to the upper oil pipe in an upward right-handed manner, the second cylinder 2-2 is screwed to the lower part of the first cylinder 2-1 in an upward right-handed manner, the valve body of the third check valve 7 is screwed to the lower part of the second cylinder 2-2 in an upward right-handed manner, the second ball 701 is inserted into the valve body in an upward direction, and finally the second valve seat 702 is screwed to the lower part of the valve body in an upward right-handed manner.

It should be noted that the spherical diameter of the second sphere 701 is larger than that of the first sphere 901, and the second sphere 701 and the first sphere 901 are both hollow spheres, which may be stainless steel balls or resin balls, and the material of the hydraulic jet pump in the embodiment of the present invention is not particularly limited.

Further, a first sealing ring 10 and a second sealing ring 11 are arranged between the pump barrel 2 and the pump core 1, the first sealing ring 10 is arranged between the second core 1-2 and the first barrel 1-1, as shown in fig. 1, the second sealing ring 11 is arranged between the third core 1-3 and the second barrel 1-2, as shown in fig. 1, the first sealing ring 10 and the second sealing ring 11 are both O-shaped sealing rings, and are used for sealing the annular space 203, preventing the mixed liquid from flowing out from between the pump barrel 2 and the pump core 1, and reducing the liquid carrying effect of the pump.

In order to realize the function of the hydraulic jet pump, in the hydraulic jet pump of the embodiment of the invention, the hydraulic jet pump further comprises a first one-way valve 6, the first one-way valve 6 is arranged in the first cavity 101 and is positioned between the spiral body 5 and the pump core 1, as shown in fig. 1, the first one-way valve 1 not only has the function of limiting the moving direction of the liquid flowing through the first one-way valve 1, namely only can enable the flowing liquid to move from top to bottom but not from bottom to top, but also can reversely pump high-pressure fluid through a specific channel of an oil jacket annulus or a concentric tubular column process when the pump core 1 needs to be taken out after the hydraulic jet pump is used up, the high-pressure fluid can enter the first cavity 101 through the third through hole 201 and the liquid outlet channel 104 and can move upwards along the pump core 1 to push the pump core 1 to move towards the wellhead direction, so that the pump core 1 enters a wellhead pump core fishing device, the pump core 1 is taken out.

It should be noted that the first check valve 6 is a shuttle check valve, as shown in fig. 19, so that when the high-pressure liquid passes through, the movement resistance of the high-pressure liquid is reduced, the formation of vortex at the edge of the first check valve 6 is prevented, and the high-pressure liquid is ensured to keep moving linearly when passing through the first check valve 6.

Based on the above device, in order to better realize stable swirling jet flow stream and ensure that the swirling jet flow stream has better liquid carrying capacity, on one hand, as can be seen from a cross-sectional schematic view of the first check valve 6 along line a1-a1, as shown in fig. 20, a first bump 601 is arranged on the outer wall of the first check valve 6, and a first limiting groove 105 is arranged on the inner wall of the pump core 1, as shown in fig. 17, the first bump 601 is movably arranged in the first limiting groove 105, so that the first check valve 6 is limited in the first limiting groove 105, can only move up and down, and cannot rotate left and right; on the other hand, the second protrusion 106 is disposed on the outer wall of the pump core 1, and can be seen not only from the structural schematic diagram of the first core 1-1, as shown in fig. 15, but also from the sectional schematic diagram of the first core 1-1 taken along the line B-B, as shown in fig. 18, and also from the sectional schematic diagram of the first core 1-1 taken along the line a2-a2, as shown in fig. 17; the inner wall of the pump barrel 2 is provided with a second limiting groove 202, as shown in fig. 4, the second bump 106 is movably arranged in the second limiting groove 202, so that the pump core 1 is limited in the pump barrel 2, can move up and down only and cannot rotate left and right, and when high-pressure liquid is prevented from flowing through the spiral surface of the spiral body 5 to form rotating jet flow, reaction force is provided for the spiral body 5, so that the pump core 1 rotates, and the function of fixing the spiral body 5 from inside to outside is achieved.

Further, in the hydraulic jet pump of the embodiment of the present invention, the hydraulic jet pump further includes a throat diffuser 8, as shown in fig. 1, the throat diffuser 8 is disposed on the inner wall of the pump core 1 and located at the lower portion of the diversion seat 4, and a specific structural schematic diagram thereof is, as shown in fig. 32, a value of an inner diameter thereof is constant at an upper half portion, a lower half portion of the inner diameter thereof is gradually increased from top to bottom, and a flow rate of a mixed liquid of the formation liquid and the high-pressure liquid is gradually decreased in combination with a cross-sectional schematic diagram taken along a line a-a, fig. 33, and a cross-sectional schematic diagram taken along a line B-B, which are shown in fig. 34.

In order to better realize the function of the hydraulic jet pump, in the hydraulic jet pump of the embodiment of the present invention, on the one hand, the hydraulic jet pump further includes a second check valve 9, the schematic structural diagram of which is shown in fig. 38, and which includes a first ball 901 and a first valve seat 902, the first valve seat 902 is provided with a first liquid inlet hole, as shown in a schematic sectional diagram 39 taken along line a-a and a schematic sectional diagram 40 taken along line B-B, wherein the diameter of the first liquid inlet hole is smaller than that of the first ball 901, the first valve seat 902 can seal the first ball 901 in the valve body, the second check valve 9 is disposed in the pump cylinder 2 and connected to the lower portion of the pump core 1, so that liquid can only flow out of the pump core 1 from the pump core 1 and can not flow out of the pump core 1 from the pump core 1, and when the pump core 1 is lowered into a well, the function of protecting the pump core 1 can be performed, and when the pump core 1 needs to be taken out, high-pressure fluid which is reversely pumped into the pump core 1 from an oil sleeve annulus or a concentric tubular column process specific channel is blocked by the second check valve 9, so that the high-pressure fluid pushes the pump core 1 to move upwards.

It should be noted that the second check valve 9 is a check valve whose bottom edge is a rounded chamfer, and is used for enabling the pump core 1 to smoothly enter the pump barrel 2, and reducing the downward resistance of the pump core 1 in the oil pipe.

In order to better realize the function of the hydraulic jet pump, in the hydraulic jet pump of the embodiment of the invention, on the other hand, the hydraulic jet pump further comprises a third check valve 7, the structural schematic diagram of which is shown in fig. 10, the hydraulic jet pump comprises a second ball 701 and a second valve seat 702, the second valve seat 702 is provided with a second liquid inlet hole, as shown in a cross-sectional schematic diagram of fig. 11 taken along line a-a and a cross-sectional schematic diagram of fig. 12 taken along line B-B, wherein the diameter of the second liquid inlet hole is smaller than that of the second ball 701, the second valve seat 702 can seal the second ball 701 in the valve body, the third check valve 7 is connected with the pump barrel 2 and is positioned at the lower part of the pump barrel 2, so that the unidirectional flow restriction of the liquid passing through the third check valve 7 is realized, the liquid can only flow out of the pump barrel 2 and can not flow out of the pump barrel 2 from the pump barrel 2, and when the pump barrel 1 needs to be taken out, the high-pressure fluid entering the pump core 1 is reversely acted by the third check valve through the special And the valve 7 is blocked to promote high-pressure fluid to push the pump core 1 to move upwards, so that the pump core 1 can leave the pump cylinder 2 to move upwards to a wellhead after being used, the recovery at the wellhead is realized, and the hydraulic jet pump can be recycled.

In order to cooperate with the device structure, the hydraulic jet pump of the embodiment of the present invention realizes more liquid carrying, in the hydraulic jet pump of the embodiment of the present invention, the first core 1-1 at the upper part of the pump core 1 is provided with 4 seventh through holes 111, as shown in fig. 16, correspondingly, the first check valve 6 is provided with 4 first overflowing holes 602, as shown in the cross section cut along the line a1-a1 in fig. 20, so as to ensure the fluency of the high-pressure fluid entering and exiting the pump core 1; the number of the first through holes 401 formed in the diversion seat 4 is 1-4, preferably, in the hydraulic jet pump according to the embodiment of the present invention, the structural schematic diagram is shown in fig. 29, the number of the first through holes 401 is 4, and as shown in a cross-sectional schematic diagram 30 of the first through holes cut along the line a-a and a cross-sectional schematic diagram 31 of the first through holes cut along the line B-B, the first through holes 401 are uniformly arranged on the diversion seat 4, so as to ensure the smoothness of the formation fluid passing through the diversion seat 4; a valve body of the second check valve 9 is provided with second overflowing holes 903, the number of the second overflowing holes 903 is 1-4, preferably, as shown in a cross-sectional schematic view 41 cut along the line A1-A1 and a cross-sectional schematic view 42 cut along the line A2-A2, the number of the second overflowing holes 903 is 4, and the fluency of the formation fluid passing through the second check valve 9 is ensured; correspondingly, the valve body of the third check valve 7 is also provided with third overflowing holes 703, the number of the third overflowing holes 703 is 1-4, preferably, as shown in a cross-sectional schematic view of fig. 13 cut along the line a1-a1 and a cross-sectional schematic view of fig. 14 cut along the line a2-a2, the number of the third overflowing holes 703 is 4, so as to ensure the smoothness of the formation fluid entering the pump barrel 2 through the first check valve 7.

It should be noted that, because the formation fluid may contain sand, the third through holes 201 are inclined upward through holes, as shown in fig. 7, and the number of the third through holes 201 is 1 to 4, preferably, in the hydraulic jet pump according to the embodiment of the present invention, the number of the third through holes 201 is 4, and thus, the local flow velocity of the mixed and produced fluid can be reduced when the mixed and produced fluid flows through the third through holes 201, and at the same time, the sand washing wear degree of the sand-containing mixed fluid on the inner wall of the pipe outside the pump can be reduced, and the service life of the pipe can be prolonged.

When a hydrajet pump of an embodiment of the present invention is required to be used in an oil recovery process operation:

firstly, putting the pump cylinder 2 and an oil pipe into a shaft together to immerse the whole pump cylinder 2 into formation fluid in the shaft;

secondly, the pump core 1 is put in and moves downwards under the action of the gravity of the pump core 1;

thirdly, continuously injecting high-pressure water into the shaft, so that the high-pressure water enters the first cavity 101 from the second through hole 102 at the upper part of the pump core 1, and is jetted out from the nozzle 3 after being accelerated by the spiral of the spiral body 5 to form a swirling jet flow stream; meanwhile, the swirling jet flow stream is mixed with the formation liquid which enters from the liquid inlet channel 103 and flows out of the first through hole 401 arranged on the flow guide seat 4, so that the swirling jet flow stream formed by high-pressure water carries the formation liquid to pass through the liquid outlet channel 104 and finally flows out of the pump from the third through hole 201 arranged on the wall of the pump barrel 2.

When the oil extraction process operation is finished or the nozzle 2 needs to be adjusted to be matched with the throat diffuser 8:

and reversely beating high-pressure water from the oil jacket annulus or the specific channel of the concentric tubular column process, so that the high-pressure water reversely enters the liquid outlet channel 104 from the third through hole 201, and the high-pressure water cannot flow out of the pump barrel 2 downwards under the one-way limiting action of the second one-way valve 9 and the third one-way valve 7, so that the high-pressure water can only move upwards to push the pump core 1 to move upwards until the pump core 1 moves to the wellhead, and the pump core 1 is taken out through a wellhead pump core catcher, stored and placed in the pump core 1 or put into the pump barrel 2 again after the nozzle 3 in the pump core 1 is matched with the throat diffusion pipe 8 again.

The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydrajetting pump, characterized in that it comprises: a pump core (1), a pump barrel (2), a nozzle (3), a flow guide seat (4) and a spiral body (5), wherein,

the pump core (1) is arranged in the pump cylinder (2);

a first cavity (101) is formed in the pump core (1), the spiral body (5), the nozzle (3) and the flow guide seat (4) are arranged in the first cavity (101) from top to bottom, the spiral body (5) is connected with the pump core (1), the nozzle (3) is arranged on the inner wall of the pump core (1), the flow guide seat (4) is arranged at a nozzle opening of the nozzle (3), the flow guide seat (4) is provided with a first through hole (401), and the first through hole (401) is communicated with the nozzle (3);

a second through hole (102) is formed in the upper part of the pump core (1), and the second through hole (102) is communicated with the first cavity (101);

a liquid inlet channel (103) is formed in the lower portion of the pump core (1), and the liquid inlet channel (103) is communicated with the first through hole (401) and the pump barrel (2); a liquid outlet channel (104) is further formed in the lower portion of the pump core (1), and the liquid outlet channel (104) is communicated with the nozzle (3);

the wall of the pump barrel (2) is provided with a third through hole (201), and the third through hole (201) is communicated with the liquid outlet channel (104).

2. The hydrojet pump of claim 1, further comprising a first one-way valve (6), the first one-way valve (6) being disposed within the first cavity (101) and between the spiral body (5) and the pump core (1).

3. The hydraulic jet pump as recited in claim 2, wherein a first bump (601) is disposed on an outer wall of the first check valve (6), a first limiting groove (105) is disposed on an inner wall of the pump core (1), and the first bump (601) is movably disposed in the first limiting groove (105).

4. The hydraulic jet pump of claim 3, wherein a second bump (106) is arranged on the outer wall of the pump core (1), a second limiting groove (202) is formed on the inner wall of the pump barrel (2), and the second bump (106) is movably arranged in the second limiting groove (202).

5. The hydrajetting pump of claim 2, characterized in that the first non return valve (6) is a shuttle non return valve.

6. The hydrajet pump according to claim 1, characterized in that it further comprises a throat diffuser (8), said throat diffuser (8) being arranged on the inner wall of said pump core (1) and being located at the lower part of said deflector seat (4).

7. The hydrajet pump according to claim 1, characterized in that it further comprises a second one-way valve (9), said second one-way valve (9) being arranged inside said pump cylinder (2) and being connected to the lower part of said pump cartridge (1).

8. Hydraulic jet pump according to claim 7, characterized in that the second non return valve (9) is a non return valve with rounded bottom edges.

9. The hydra-jet pump according to claim 1, wherein the third through-holes (201) are obliquely upward through-holes, and the number of the third through-holes (201) is 1 to 4.

10. The hydrajetting pump of claim 1, further comprising a third one-way valve (7), said third one-way valve (7) being connected to said pump cylinder (2) and being located at a lower portion of said pump cylinder (2).