CN110873043A - Oil well pump corrosion prevention device and method - Google Patents
Oil well pump corrosion prevention device and method Download PDFInfo
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- CN110873043A CN110873043A CN201811016404.4A CN201811016404A CN110873043A CN 110873043 A CN110873043 A CN 110873043A CN 201811016404 A CN201811016404 A CN 201811016404A CN 110873043 A CN110873043 A CN 110873043A
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- Prior art keywords
- oil
- oil outlet
- joint
- well pump
- oil well
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/18—Lubricating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses an oil well pump anti-corrosion device and method, wherein the anti-corrosion device comprises an oil outlet short section, a two-way joint and a cannula, the lower end of the oil outlet short section is connected with the two-way joint, the two-way joint is provided with a produced liquid channel and a lubricating anti-corrosion channel, the lower end of the cannula is communicated with the lubricating anti-corrosion channel of the two-way joint, the upper end of the cannula extends into the oil outlet short section, and the cannula and the oil outlet short section form an annular space. The lower end of the produced liquid channel is communicated with the inner space of the plunger, and the upper end of the produced liquid channel is communicated with the inner cavity of the oil outlet nipple. One end of the lubricating anti-corrosion channel is communicated with the lower port of the insertion pipe, and the other end of the lubricating anti-corrosion channel is communicated to the outer side of the outer wall of the two-way joint. The oil outlet short section is provided with a radial output hole, the upper port of the insertion tube is higher than the output hole, and the upper port of the insertion tube is lower than the upper port of the oil outlet short section. The invention changes the lubricating medium between the sealing pairs by utilizing the self-enrichment principle of crude oil, realizes that the contact medium of the sealing pairs is changed from water into oil, and further improves the anti-corrosion performance of the oil well pump.
Description
Technical Field
The invention relates to an oil well pump anticorrosion technology, in particular to an oil well pump anticorrosion device and method.
Background
In the normal working process of the oil well pump, an oil film can be formed in the clearance between the plunger and the pump barrel, and the lubricating and anti-corrosion effects are achieved. However, the water content of the produced liquid rises in the middle and later stages of development of the oil field, the clearance between the plunger and the pump barrel cannot be lubricated by crude oil, and the friction coefficient is increased, so that the corrosion and the abrasion of the oil well pump are aggravated, and the lifting service life of the oil well pump is shortened.
Regarding the corrosion prevention of oil-well pumps, there are two main methods at present: one method is to adopt surface treatment technologies such as chromium plating, nickel-phosphorus plating, spray welding, coating and the like to realize corrosion prevention, but the corrosion prevention period of the method is related to the surface treatment process level, the coating thickness and the like, the problem of failure of an oil well pump caused by corrosive wear of a pump barrel plunger still exists in field application, and the corrosion prevention effect needs to be enhanced; the other is made of special materials (such as non-metallic materials, copper pump cylinders and the like), but has higher requirements on temperature resistance, corrosion resistance, wear resistance and tensile strength, high cost and poor field adaptability.
Application No.: 201520782223.8, be used for anticorrosive scale control oil-well pump of spiral-flow tube formula, including coupling, the pump body, standing valve on the pump line, coupling, the pump body, standing valve connect gradually on the pump line, install the internal thread plunger through the pump barrel in the pump body, the standing valve includes the standing valve cover, the standing valve joint is installed to the right-hand member of standing valve cover, install standing valve seat, standing valve ball between standing valve cover and the standing valve head, the standing valve ball is located the left end of standing valve seat, the standing valve whirl head is still installed to the left end inboard of standing valve cover. The beneficial effects are as follows: prevent the dirt from crystallizing and solidifying at the liquid retention part, prolong the service life of the oil well pump and improve the oil pumping efficiency.
Application No.: 201410095806.3 discloses an anti-corrosion sand-prevention wear-resistant oil well pump, which comprises a pump barrel, wherein the upper end of the pump barrel is connected with an upper pump barrel coupling through a thread, the lower end of the pump barrel is connected with a fixed one-way valve through a lower pump barrel coupling, a plunger body with an axis on the same straight line with the axis of the pump barrel is arranged in the pump barrel, the upper end and the lower end of the plunger body are respectively connected with an upper downstream one-way valve and a lower downstream one-way valve, the fixed one-way valve comprises a fixed valve seat joint, the fixed valve seat joint is connected with a sand-prevention pipe through a thread, the lower end of the sand-prevention pipe is provided with a seal plug through a thread, the pipe wall of the sand-prevention pipe is evenly provided with oil inlet holes, the sand-prevention pipe is sleeved with a sand-prevention sleeve, the pipe wall of the sand-prevention. The anti-corrosion sand-control wear-resistant oil well pump with the structure can effectively prevent fine sand and other hard fine particles from entering the pump cylinder, and further reduces the abrasion to the wall surface matched with the plunger body and the pump cylinder.
Application No.: 200710162753.2A sacrificial anode protection cathode-oil pump anti-corrosion device, which is designed into the anode of oil pump by using the principle of electrochemical sacrificial anode protection cathode and active metals such as zinc, lead, magnesium, etc. The manufacturing method comprises the steps of processing the oil well pump short section according to the technical specification of the oil well pump, wherein the length of the short section is 400 plus 500MM, then placing the oil well pump short section into a special rod cavity, melting a magnesium or aluminum or zinc metal block into liquid by heating, then casting into the special oil well pump short section cavity, demoulding after forming, heat preservation and slow cooling, then machining, processing a rough blank into a smooth revolution body, processing threads at two ends of the oil well pump short section, and installing a coupling to form the oil well pump anode assembly. The installation method is that in the process of lowering the oil well pump, the anode of the oil well pump is connected in series with the coupling at the lower end of the oil well pump, and the coupling is screwed down.
Through search, the technical scheme which is the same as the technical scheme disclosed by the invention is not found.
Disclosure of Invention
The invention aims to provide an oil well pump anticorrosion device and method, which change a lubricating medium between sealing pairs by utilizing a crude oil self-enrichment principle, realize that a contact medium of the sealing pairs is changed from water to oil, further improve the anticorrosion performance of the oil well pump, effectively solve the problem of corrosion and abrasion between a plunger and a pump barrel of an oil well pump and prolong the pump inspection period.
In order to achieve the purpose, the invention provides the following technical scheme that the oil well pump anti-corrosion device comprises an oil outlet short section, a two-way joint and an insertion pipe, wherein the lower end of the oil outlet short section is connected with the two-way joint, the two-way joint is provided with a produced liquid channel and a lubricating anti-corrosion channel, the lower end of the insertion pipe is communicated with the lubricating anti-corrosion channel of the two-way joint, the upper end of the insertion pipe extends into the oil outlet short section, and the insertion pipe and the oil outlet short section form an annular space.
The lower end of the produced liquid channel is communicated with the inner space of the plunger, and the upper end of the produced liquid channel is communicated with the inner cavity of the oil outlet nipple.
One end of the lubricating anti-corrosion channel is communicated with the lower port of the insertion pipe, and the other end of the lubricating anti-corrosion channel is communicated to the outer side of the outer wall of the two-way joint.
The oil outlet short section is provided with a radial output hole, the upper port of the insertion tube is higher than the output hole, and the upper port of the insertion tube is lower than the upper port of the oil outlet short section.
The oil outlet nipple upper end is connected with the sucker rod through the sucker rod joint, and the plunger is connected to the bi-pass joint lower end.
The two-way joint is the same as the outer diameter of the plunger of the oil well pump, and forms clearance seal with the pump barrel.
In order to achieve the other purpose, the invention provides the following technical scheme that the oil well pump anticorrosion method is characterized in that produced fluid of a high-water-content oil well enters a produced fluid channel of a double-way joint through a plunger, then enters an oil outlet short section upwards, and is gathered in an annular space between the oil outlet short section and a cannula, oil-water separation is carried out on the produced fluid due to density difference, liquid rich in crude oil is gathered above the annular space, an upper port of the cannula is higher than a production hole, and an upper port of the cannula is lower than an upper port of the oil outlet short section, so that the upper port of the cannula is positioned at a liquid gathering position rich in crude oil, then the liquid rich in crude oil enters the cannula, enters a gap formed by the double-way joint and a pump cylinder through a lubricating anticorrosion channel, and enters a gap between the plunger and the pump cylinder to play a role.
Compared with the prior art, the invention has the following beneficial effects:
the produced fluid of the high water-containing oil well enters the oil outlet nipple through the oil outlet flow passage and is gathered in the annulus of the oil outlet nipple and the cannula, the produced fluid is subjected to oil-water separation due to density difference, the fluid rich in crude oil is gathered above the annulus, and when a certain amount is reached, the crude oil enters the sealing pair fit gap through the lubricating flow passage to play a role in lubrication and corrosion prevention.
The structure of the oil well pump is optimized by adopting a mechanical design method, the self-enrichment of crude oil in the oil well pump is realized, a lubricating medium between sealing pairs is changed, and the automatic oil lubrication between a pump cylinder and a plunger of the oil well pump is realized;
the corrosion resistance and lubrication can be realized only by a small amount of crude oil, the corrosion resistance period is long, and the processing cost is low.
The invention is applied to lifting of the high water-cut well, can effectively solve the problem of corrosive wear between the plunger and the pump barrel of the oil well pump, prolongs the pump detection period and reduces the investment cost.
Drawings
FIG. 1 is a schematic structural diagram of an oil well pump corrosion prevention device according to the present invention;
FIG. 2 is a cross-sectional view of a two-way joint A-A.
In the figure: the oil pumping rod comprises a sucker rod joint 1, an oil outlet short section 2, a cannula 3 and a two-way joint 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 2, the present invention provides a technical solution: the utility model provides an anticorrosive device of oil-well pump, includes oil nipple joint 2, bi-pass joint 4, intubate 3, bi-pass joint 4 is connected to 2 lower extremes of oil nipple joint, the bi-pass joint is seted up extraction liquid passageway II and lubricated anticorrosive passageway I, 3 lower extreme intercommunication bi-pass joints's of intubate lubricated anticorrosive passageway, the intubate upper end then stretch into oil nipple joint 2 in, intubate 3 forms the annular space with oil nipple joint 2.
The lower end of the produced liquid channel is communicated with the inner space of the plunger, and the upper end of the produced liquid channel is communicated with the inner cavity of the oil outlet nipple.
One end of the lubricating anti-corrosion channel is communicated with the lower port of the insertion pipe, and the other end of the lubricating anti-corrosion channel is communicated to the outer side of the outer wall of the two-way joint.
Radial output holes are formed in the oil outlet short section, the upper port of the insertion tube 3 is higher than the output holes, and meanwhile the upper port of the insertion tube 3 is lower than the upper port of the oil outlet short section.
The oil outlet nipple upper end is connected with the sucker rod through the sucker rod joint 1, and the plunger is connected to the lower end of the bi-pass joint.
The cannula 3 is connected with a double-way joint 4; the upper end of the two-way joint 4 is connected with the oil outlet nipple 2, and the lower end is connected with the plunger of the oil pump; the two-way joint 4 has the same outer diameter as the plunger of the oil well pump and forms clearance seal with the pump barrel; the bi-pass joint 4 is provided with a produced liquid channel II and a lubricating anticorrosive channel I, wherein the produced liquid channel II is communicated to the inside of the plunger, and the lubricating anticorrosive channel I is communicated to a gap between plunger pump barrels of the oil well pump; the lower part of the oil outlet short joint 2 is provided with an output hole, and the upper end of the oil outlet short joint is connected with a sucker rod through a sucker rod joint 1.
And the inner space of the plunger, the produced fluid channel II, the oil outlet short section 2 and the annular space of the pump cylinder form an oil outlet flow passage.
The inside space of 3 inner spaces of intubate, lubricated anticorrosive passageway I, two pass joint 4 and the clearance that the pump barrel formed, plunger pump barrel cooperation clearance constitute lubricated runner.
The oil extraction process of the invention is consistent with that of a common oil well pump, the lubricating and anti-corrosion working process is that the produced fluid of a high water-containing oil well enters the produced fluid channel of the double-way joint through the plunger, then enters the oil outlet nipple upwards and is gathered in the annular space of the oil outlet nipple and the insertion tube, the produced fluid is subjected to oil-water separation due to density difference, the fluid rich in crude oil is concentrated above the annular space, the upper port of the insertion tube is higher than the output hole, and the upper port of the insertion tube is lower than the upper port of the oil outlet nipple, so the upper port of the insertion tube is positioned at the fluid concentration position rich in crude oil, and then the fluid rich in crude oil enters the insertion tube, enters the gap formed by the double-way joint and the pump cylinder through the lubricating and anti-corrosion channel, and enters the gap between.
In the description of the present invention, it is to be understood that the positional indications or positional relationships are based on those shown in the drawings and are for the purpose of facilitating the description of the present invention, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an anticorrosive device of oil-well pump, its characterized in that, includes oil outlet nipple joint, bi-pass joint, intubate, the bi-pass joint is connected to oil outlet nipple joint lower extreme, the bi-pass joint is seted up extraction liquid passageway and lubricated anticorrosive passageway, the anticorrosive passageway of lubrication of intubate lower extreme intercommunication bi-pass joint, the intubate upper end then stretch into the oil outlet nipple joint, intubate and oil outlet nipple joint formation annular space.
2. The corrosion prevention device for the oil well pump according to claim 1, wherein the lower end of the produced fluid channel is communicated with the inner space of the plunger, and the upper end of the produced fluid channel is communicated with the inner cavity of the oil outlet nipple.
3. The anticorrosion device for an oil well pump as defined in claim 1 or 2, wherein one end of the lubricating anticorrosion channel is communicated with the lower port of the insertion tube, and the other end is communicated with the outer side of the outer wall of the double-way joint.
4. The corrosion prevention device for the oil well pump according to claim 1 or 2, wherein the oil outlet nipple is provided with a radial output hole, the upper port of the insertion tube is higher than the output hole, and the upper port of the insertion tube is lower than the upper port of the oil outlet nipple.
5. The anticorrosion device for oil well pump as defined in claim 1 or 2, wherein the upper end of said oil outlet nipple is connected to the sucker rod through a sucker rod joint, and the lower end of said two-way joint is connected to the plunger.
6. The corrosion prevention device for an oil well pump according to claim 1 or 2, wherein the two-way joint has the same outer diameter as a plunger of the oil well pump and forms a clearance seal with the pump cylinder.
7. An oil well pump anticorrosion method is characterized in that produced fluid of a high-water-content oil well enters a produced fluid channel of a two-way joint through a plunger, then upwards enters an oil outlet nipple and gathers in an annular space between the oil outlet nipple and an insertion tube, oil-water separation occurs to the produced fluid due to density difference, crude oil-rich liquid concentrates above the annular space, an upper port of the insertion tube is higher than a production hole, and an upper port of the insertion tube is lower than an upper port of the oil outlet nipple, so that the upper port of the insertion tube is located at a crude oil-rich liquid concentration position, then the crude oil-rich liquid enters the insertion tube, enters a gap formed by the two-way joint and a pump cylinder through a lubricating anticorrosion channel, and simultaneously enters a gap between the plunger and the pump cylinder to play a role of a lubricating sealing pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811016404.4A CN110873043A (en) | 2018-08-31 | 2018-08-31 | Oil well pump corrosion prevention device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811016404.4A CN110873043A (en) | 2018-08-31 | 2018-08-31 | Oil well pump corrosion prevention device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110873043A true CN110873043A (en) | 2020-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811016404.4A Pending CN110873043A (en) | 2018-08-31 | 2018-08-31 | Oil well pump corrosion prevention device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110873043A (en) |
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2018
- 2018-08-31 CN CN201811016404.4A patent/CN110873043A/en active Pending
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