CN222067013U - Underground driving type submersible reciprocating pump - Google Patents
Underground driving type submersible reciprocating pump Download PDFInfo
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- CN222067013U CN222067013U CN202420097988.7U CN202420097988U CN222067013U CN 222067013 U CN222067013 U CN 222067013U CN 202420097988 U CN202420097988 U CN 202420097988U CN 222067013 U CN222067013 U CN 222067013U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 abstract description 7
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 19
- 238000005086 pumping Methods 0.000 description 10
- 239000010779 crude oil Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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- Details Of Reciprocating Pumps (AREA)
Abstract
The invention relates to the technical field of petroleum equipment, and particularly discloses an underground driving type submersible reciprocating pump which comprises an upper joint, wherein the bottom of the upper joint is coaxially connected with a small-diameter plunger cylinder, an upper fixed valve is arranged in a cavity of the small-diameter plunger cylinder, the lower end of the small-diameter plunger cylinder is connected with a large-diameter piston cap, and a lower fixed valve is arranged in the large-diameter piston cap; the outside of the small-diameter plunger cylinder is connected with a small-diameter pump cylinder in a sliding and sealing manner, the bottom of the small-diameter pump cylinder is connected with a large-diameter pump cylinder, and a group of oil inlet holes are formed in the bottom of the large-diameter pump cylinder; the large-diameter pump cylinder sliding sleeve is sleeved outside the large-diameter piston cap, and the top of the large-diameter piston cap is provided with a pressure transmission hole communicated with the top of the inner cavity of the large-diameter pump cylinder; and the effect of long stroke and low stroke frequency can be realized, and the device has higher efficiency and service life.
Description
Technical Field
The invention relates to the technical field of petroleum equipment, in particular to an underground driving type submersible reciprocating pump.
Background
At present, the oil extraction mode using the submersible reciprocating pump is suitable for well conditions of deep wells, inclined wells and the like, has strong adaptability to well conditions of high temperature, sand discharge and the like, and particularly provides up-and-down reciprocating driving force by installing an oil pumping unit at the bottom of a well, and drives an oil pump to work by using the up-and-down reciprocating driving force;
In recent years, more and more oil extraction modes are applied, but the currently used submersible reciprocating pump is designed according to the up-and-down stroke of an aboveground pumping unit (beam pumping unit and belt pumping unit), crude oil can be discharged only by acting when a plunger moves upwards, the structure is extremely unfavorable in operation mode for using the underground pumping unit to match with the existing submersible reciprocating pump, the phenomenon of instability of a compression rod is easy to occur when the connecting rod of the underground pumping unit lifts, equipment abrasion is aggravated, the stroke of a submersible reciprocating pump system can only be designed to be very short, the displacement is reduced, the reciprocating frequency is improved, the displacement is improved to a certain extent, but the abrasion of the system is aggravated, and the service life is reduced.
Disclosure of utility model
The invention aims at overcoming the defects of the prior art, and provides the underground driving type submersible reciprocating pump which can avoid the occurrence of the instability of a compression bar when lifting oil discharge is adopted at present by discharging oil to the ground when pulling down to do work, and can design the up-and-down reciprocating stroke to be very long, so that the effect of low stroke frequency of the long stroke is realized, and the underground driving type submersible reciprocating pump not only has higher efficiency, but also has longer service life.
The technical scheme of the invention is as follows: the underground driving type submersible reciprocating pump comprises an upper joint, wherein the bottom of the upper joint is coaxially connected with a small-diameter plunger barrel, an upper fixed valve is arranged in a cavity of the small-diameter plunger barrel, the lower end of the small-diameter plunger barrel is connected with a large-diameter plunger cap, and a lower fixed valve is arranged in the large-diameter plunger cap;
The outside of the small-diameter plunger cylinder is connected with a small-diameter pump cylinder in a sliding and sealing manner, the bottom of the small-diameter pump cylinder is connected with a large-diameter pump cylinder, and a group of oil inlet holes are formed in the bottom of the large-diameter pump cylinder;
The large-diameter pump cylinder sliding sleeve is sleeved outside the large-diameter piston cap, and the top of the large-diameter piston cap is provided with a pressure transmission hole communicated with the top of the inner cavity of the large-diameter pump cylinder.
Preferably, the outer side of the bottom of the upper joint is connected with a pump shell which is coaxially arranged, and an annular gap is reserved between the pump shell and the bottom of the large-diameter pump cylinder.
Preferably, a group of sieve holes are formed in the wall of the pump shell, the lower end of the pump shell is connected with a lower joint, and the bottom of the large-diameter pump cylinder is slidably sleeved in the inner cavity of the lower joint.
Preferably, the upper fixed valve is at least two groups arranged at intervals along the axis.
Preferably, the lower fixed valve is at least two groups arranged at intervals along the axis.
Compared with the prior art, the invention has the following advantages: according to the invention, oil can be discharged to the ground when the pull rod of the well bottom reciprocating mechanism is pulled down to do work when the pull rod is pulled down, so that the problem of instability is avoided, and the reciprocating operation of the system is more stable;
The design of the pull-down acting can design the up-and-down reciprocating stroke to be very long, so that the reciprocating times are less under the condition of the same oil discharge amount, the effect of long stroke and low stroke frequency can be truly realized, and the device has higher efficiency and longer service life.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
In the figure: 1. the device comprises an upper connector, 2, a small-diameter plunger cylinder, 3, a pump shell, 4, a small-diameter pump cylinder, 5, a large-diameter pump cylinder, 6, a large-diameter plunger cap, 7, a lower connector, 8, a lower fixed valve, 9, an upper fixed valve, 10, a pressure transmission hole, 11, an oil inlet hole, 12, an annular gap, 13, sieve holes, A, a suction cavity, B and a piston cavity.
Detailed Description
The invention is further illustrated by the following examples in connection with the accompanying drawings.
Example 1
Referring to fig. 1, the underground driving type submersible reciprocating pump comprises an upper joint 1, wherein the bottom of the upper joint 1 is in threaded connection with a small-diameter plunger cylinder 2, and the inner cavity of the small-diameter plunger cylinder 2 is communicated with the inner cavity of the upper joint 1.
The cavity of the small-diameter plunger cylinder 2 is internally provided with an upper fixed valve 9, the lower end of the small-diameter plunger cylinder 2 is connected with a large-diameter plunger cap 6, a lower fixed valve 8 is arranged in the large-diameter plunger cap 6, the upper fixed valve 9 and the lower fixed valve 8 are opened when liquid flow is from bottom to top, and the liquid flow is closed when the liquid flow is from top to bottom.
The outside sliding seal of minor diameter plunger section of thick bamboo 2 connects minor diameter pump barrel 4, and the bottom threaded connection major diameter pump barrel 5 of minor diameter pump barrel 4, a set of inlet port 11 has been seted up to the bottom of major diameter pump barrel 5.
The large diameter pump cylinder 5 is sealed outside the large diameter piston cap 6 in a sliding manner, and the large diameter piston cap 6 is slid downwards in the inner cavity of the large diameter pump cylinder 5 to form a suction cavity A with gradually increased capacity.
The top of the large-diameter piston cap 6 is provided with a pressure transmission hole 10 communicated with the top of the inner cavity of the large-diameter pump cylinder 5, and the piston cavity B of the large-diameter piston cap 6 is communicated with the suction cavity A through the pressure transmission hole 10.
Working principle:
When the oil pumping device is used, the upper joint 1 is connected with an oil conveying pipe with a ground wellhead, the bottom of the large-diameter pump cylinder 5 is connected with a pull rod of an oil pumping unit at the bottom of a well, and the large-diameter pump cylinder 5 is driven to reciprocate up and down through the oil pumping unit;
when the small-diameter pump cylinder 4 and the large-diameter pump cylinder 5 move upwards, the capacity of the suction cavity A is gradually increased, negative pressure is formed inside the suction cavity A, the upper fixed valve 9 is closed, the lower fixed valve 8 is opened, and crude oil is sucked into the piston cavity B and the suction cavity A through the oil inlet hole 11;
When the small-diameter pump cylinder 4 and the large-diameter pump cylinder 5 move downwards, the capacity of the suction cavity A is gradually reduced, the internal pressure is increased, the upper fixed valve 9 is opened, the lower fixed valve 8 is closed, and therefore crude oil in the piston cavity B and the suction cavity A is extruded into the inner cavity of the small-diameter plunger cylinder 2 and is pumped to the ground along an oil delivery pipe connected with the upper part of the pump;
the above-described oil suction and discharge processes are continuously repeated as the large-diameter pump cylinder 5 reciprocates up and down to perform continuous production.
According to the invention, crude oil can be discharged to the ground when the small-diameter pump cylinder 4 and the large-diameter pump cylinder 5 move downwards, so that the pull rod of the pumping unit at the bottom of the well does work when pulling downwards, the problem of instability is avoided, and the reciprocating operation of the system is more stable;
Therefore, the design of the pull-down acting can design the up-and-down reciprocating stroke to be long, so that the reciprocating times are less under the condition of the same oil discharge amount, the effect of long stroke and low stroke frequency can be truly realized, and the pull-down acting device not only has higher efficiency, but also has longer service life.
Example 2
The embodiment optimizes the overall structural strength of the invention based on the embodiment, and specifically comprises the following steps:
As shown in fig. 1, the outer side of the bottom of the upper joint 1 is connected with a pump shell 3 which is coaxially arranged, an annular gap 12 is reserved between the pump shell 3 and the bottom of the large-diameter pump cylinder 5, and crude oil can flow into an oil inlet hole 11 through the annular gap 12 during production.
The small diameter plunger cylinder 2, the small diameter pump cylinder 4, the large diameter pump cylinder 5, and the large diameter piston cap 6 are disposed inside the pump housing 3 for protection.
As shown in fig. 1, a set of sieve holes 13 are formed in the wall of the pump casing 3, so that the pump casing 3 forms a sieve tube structure and effect, and meanwhile, the sieve holes 13 at the upper end position of the pump casing 3 can also communicate the upper end of the inner cavity of the pump casing 3 with the outside, so that the blocking of pressure at the upper end of the inner cavity of the pump casing 3 when the large-diameter pump cylinder 5 moves upwards is avoided.
The lower end of the pump shell 3 is connected with a lower joint 7, the bottom of the large-diameter pump cylinder 5 is sleeved in the inner cavity of the lower joint 7 in a sliding way, a centralizing effect is formed when the large-diameter pump cylinder 5 moves, and the whole structural strength of the pump can be effectively improved through the design that the upper joint 1 and the lower joint 7 are connected at the two ends of the pump shell 3.
Example 3
The embodiment optimizes the assembly of the fixed valve based on the embodiment, specifically:
As shown in fig. 1, the upper fixed valve 9 is at least two groups arranged at intervals along the axis, and the lower fixed valve 8 is at least two groups arranged at intervals along the axis.
The design of the two sets of valves has the backup effect, one set of valves fails when in use, and the other set of valves can be used for normal production, so that the whole service life is prolonged.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420097988.7U CN222067013U (en) | 2024-01-16 | 2024-01-16 | Underground driving type submersible reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420097988.7U CN222067013U (en) | 2024-01-16 | 2024-01-16 | Underground driving type submersible reciprocating pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222067013U true CN222067013U (en) | 2024-11-26 |
Family
ID=93546701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420097988.7U Active CN222067013U (en) | 2024-01-16 | 2024-01-16 | Underground driving type submersible reciprocating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222067013U (en) |
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2024
- 2024-01-16 CN CN202420097988.7U patent/CN222067013U/en active Active
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