CN210033312U - Oil well polished rod corrosion prevention device - Google Patents
Oil well polished rod corrosion prevention device Download PDFInfo
- Publication number
- CN210033312U CN210033312U CN201920584058.3U CN201920584058U CN210033312U CN 210033312 U CN210033312 U CN 210033312U CN 201920584058 U CN201920584058 U CN 201920584058U CN 210033312 U CN210033312 U CN 210033312U
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- polish rod
- polished rod
- pipe
- gland
- barrel
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Abstract
The utility model discloses an oil well polished rod corrosion prevention device, including the barrel, still including carrying oilcan, fretwork pipe, glan, the polished rod runs through the centre bore is seted up simultaneously to barrel upper end and lower extreme, the glan is through-type tubular structure, and port welding is in barrel inner chamber bottom surface under the glan to the polished rod of barrel lower extreme runs through centre bore and glan and link up mutually, carry the oilcan and include inner tube, outer tube, go-between, radial inlet port is seted up to the outer tube lateral wall, fretwork pipe is connected to the inner tube lower extreme. When the top surface of the medicament in the medicament extracting kettle is higher than the top end of the Daglan, the medicament flows into an annular space between the Glan and the cylindrical tube in the middle of the polished rod dosing device and flows down along the polished rod along the hollow hole of the tube, so that the purpose of corrosion prevention of the polished rod is achieved, and the technical problem of serious corrosion of the polished rod in the prior art is solved.
Description
Technical Field
The utility model belongs to the technical field of the polished rod technique of beam-pumping unit well and specifically relates to an oil well polished rod anti-corrosion device.
Background
The polish rod of the pumping well is positioned at the uppermost part of the pumping rod, the stress is maximum, the surface is smooth, and the polish rod is combined with the packing in the packing box to seal the well mouth, prevent oil, gas and water from leaking and realize the excessive connection of the pumping rod and the rope hanger. Some oil well produced fluids increase in viscosity, the ability of carrying suspended matters is enhanced to cause serious abrasion and corrosion and aggravate bacterial reproduction to make bacterial corrosion aggravate, the problem that polished rod is seriously corroded exists, a large pot hole appears in the polished rod, packing sealing is not tight, oil leakage is serious, in addition, the corrosion seriously shortens the service life of the polished rod, and the workload of personnel and the development cost of an oil field are increased. In view of the problems, the 'oil well polish rod anticorrosion device' is provided, and the technical problem of serious polish rod corrosion in the prior art is solved by using the device to complete the anticorrosion of the oil well polish rod.
Application No.: 201720824908.3 discloses an oil well polished rod corrosion prevention device, including the drum, the drum is including the last packing box that from top to bottom sets up, cartridge case and lower packing box, it is provided with the recess to go up packing box top surface, it is provided with cylindric last packing to go up packing box centre of a circle department, it is provided with the medicine hole respectively to go up the packing both sides, lower packing box centre of a circle department is provided with cylindric lower packing, the lower packing extends to down the packing box outside and external oil well packing box has, oil well packing box center department is provided with the through-hole, the bottom is provided with the well head flange, it is half a section of thick bamboo to go up packing box, cartridge case and lower packing box from centre of a circle. The utility model discloses at rod-pumped well polish rod up-and-down motion's in-process, to scribbling the corrosion inhibitor on the polish rod to make polish rod metal surface form the one deck adsorption film, keep apart with external corrosion factor and reach anticorrosive effect.
Application No.: 201721850535.3 provides a portable polish rod anti-corrosion lubricating device, which comprises a button strong magnet, a storage box arranged on the upper part of a packing gland and a zinc sheet arranged on the inner wall of the storage box. The storage box is upper portion opening, and the tubular structure of round hole is seted up at lower part bottom plate center, and the storage box cup joints in the polished rod outside, and detachable is provided with the opening baffle on the box wall of storage box. The lower surface of the bottom plate at the lower part of the storage box is provided with a plurality of circular grooves, and the button strong magnets are arranged in the circular grooves. The utility model discloses have the effect of obvious anticorrosive scale control wax control to the polished rod to can carry out fine lubrication to the polished rod, and simple to operate is swift, has effectively solved because of the polished rod corrodes the problem that causes oil, water to leak the well head pollution that causes outward, has guaranteed green clean production.
Application No.: 201620501566.7 discloses a polish rod anti-corrosion device, which belongs to the technical field of oil exploitation accessories. The device comprises: packing pressing cap and liquid discharging barrel; the packing pressing cap is sleeved on the outer side of the polish rod and arranged above the packing pressing cover, and the inner side of the lower end of the packing pressing cap is statically connected with the outer side of the upper end of the packing box; the liquid discharging cylinder is sleeved on the outer side of the polished rod, the lower end of the liquid discharging cylinder is in close contact with the top of a boss arranged at the upper end of the packing pressing cap, and the inner side of the lower end of the liquid discharging cylinder is statically connected with the outer side of the upper end of the packing pressing cap; the polish rod, the packing pressing cap, the liquid discharging barrel and the packing in the packing box form an annular space. The utility model provides a current polished rod anticorrosive device carry out anticorrosive treatment's operation to the polished rod more complicated, and the higher problem of cost, realized simplifying anticorrosive treatment operation, reduce cost's effect for carry out anticorrosive treatment to the polished rod.
Application No.: 201320814591.7 relates to an oil recovery well head polished rod anticorrosion packing box, constitute by wearing the one-level and the second grade packing box of dress on the polished rod, be equipped with anticorrosive agent between the two-stage packing box and add the medicine box, wherein, the one-level packing box is including packing pressure cap, go up glan and upper seal packing, it adds medicine box threaded connection with anticorrosive agent to go up packing pressure cap, the second grade packing box is including packing pressure cap down, glan and lower seal packing down, lower packing pressure cap passes through the screw thread and is connected with the three-way pipe of well head, glan and lower seal packing are equipped with down in proper order in it, the top of pressing the cap at packing is equipped with the box seat of being connected with anticorrosive agent adds the medicine box down. The packing box can effectively prevent the polished rod from being corroded, avoids the situation that the packing is punctured due to the polished rod corrosion, and reduces the labor intensity and the production cost.
Technical scheme and the technical problem that will solve and the beneficial effect who produces of above disclosure technique all with the utility model discloses inequality, to the utility model discloses more technical characteristics and the technical problem and the beneficial effect that will solve all do not have the technological inspiration in the above technical document that discloses.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an oil well polished rod corrosion prevention device, polished rod charge device installs the lower extreme at beam-pumping unit polished rod eye, during polished rod upward movement, polished rod charge device's medicine carrying kettle falls in the bottom of barrel, the medicine in the cartridge case flows in the medicine carrying kettle, when polished rod moves down to nearly dead center position, the contact falls on well head packing box pressure cap, it is static to carry the medicine kettle, glan in the barrel continues to move down, when the medicine top surface in carrying the medicine kettle is higher than the top of dara, after the medicine flows in the annular space between glan and polished rod charge device middle part drum tubular product, flow down along the polished rod along tubular product fretwork hole, reach the anticorrosive purpose of polished rod, the serious technical problem of polished rod corrosion in the prior art has been solved.
In order to achieve the purpose, the utility model adopts the following technical scheme that the oil well polish rod anti-corrosion device comprises a cylinder body, an oil lifting kettle, a hollow pipe and a gland, wherein the upper end and the lower end of the cylinder body are simultaneously provided with polish rod through center holes, the gland is a through tubular structure, the lower end of the gland is welded on the bottom surface of the inner cavity of the cylinder body, the polish rod through center hole at the lower end of the cylinder body is communicated with the gland, the oil lifting kettle comprises an inner pipe, an outer pipe and a connecting ring, the outer diameter of the inner pipe is smaller than the inner diameter of the gland and is equal to the inner diameter of the polish rod through center hole at the lower end of the cylinder body, the inner diameter of the inner pipe is larger than the outer diameter of the polish rod, the outer diameter of the outer pipe is larger than the gland, an annular space is formed between the inner wall of the outer pipe and the outer wall of the, the radial oil inlet hole is opened to the outer tube lateral wall, the fretwork pipe is connected to the inner tube lower extreme.
The vertical distance from the oil inlet hole of the outer pipe to the lower annular plate is smaller than the height of the Glan, the inner diameter of the hollow pipe is larger than the outer diameter of the polished rod, and the outer diameter of the hollow pipe is smaller than the inner diameter of the Glan.
The lower part of the cylinder body is provided with a sheath, the inner diameter of the sheath is larger than the outer diameter of the hollow pipe, and the line of the sheath is consistent with the axis of the hollow pipe or the polished rod.
The upper end of the barrel body is also provided with a dosing port, and the dosing port is also provided with a turnover type sealing cover.
The polished rod at the upper end of the barrel body penetrates through the hole outer port and is further welded with a section of guide pipe, the inner diameter of the guide pipe is larger than the outer diameter of the polished rod, the outer wall of the guide pipe is welded with a fixing part, the fixing part is provided with a bolt hole, and the barrel body is fixed at a wellhead through a bolt.
The lower port of the gland and the bottom surface of the inner cavity at the lower end of the cylinder body are welded into a whole.
The total height of the inner cavity of the cylinder body is larger than the sum of the heights of the oil lifting pot and the gland.
Compared with the prior art, the utility model following beneficial effect has:
the polish rod dosing device is installed at the lower end of a polished rod eye of the oil pumping unit, when the polish rod moves upwards, a medicine extracting pot of the polish rod dosing device falls on the bottom of a barrel body, medicine in a medicine barrel flows into the medicine extracting pot, when the polish rod moves downwards to a position close to a bottom dead center, a contact falls on a wellhead packing box pressing cap, the medicine extracting pot is static, a gland in the barrel body continues to move downwards, when the top surface of the medicine in the medicine extracting pot is higher than the top end of the gland, the medicine flows into an annulus between the gland and a middle cylinder pipe of the polish rod dosing device and flows down along a hollow hole of the pipe along the polish rod, the purpose of preventing corrosion of the polish rod is achieved, and the technical problem that the polish rod in.
In the process of carrying out polished rod anticorrosion operation by using a polished rod dosing device in an oil well with seriously corroded polished rod, the corrosion inhibitor flows down along the polished rod and coats the polished rod with the corrosion inhibitor, so that an adsorption film is formed on the metal surface of the polished rod and is isolated from external corrosion factors to achieve the anticorrosion effect, the corrosion of well fluid bacteria to the polished rod is effectively prevented, the service life of the polished rod is greatly prolonged, and the service life of a wellhead packing is prolonged. The protective sleeve not only has the function of safety protection, but also can bear a corrosion inhibitor. When the corrosion inhibitor flows down along the polish rod and is stored in the sheath, the corrosion inhibitor can be recovered in time, and clean production is realized. The oil well uses the polished rod dosing device, so that the production cost of polished rod replacement is reduced, the clean production of the oil well is maintained, the labor intensity of workers is reduced, and the oil extraction time rate is improved.
Drawings
FIG. 1 is a schematic structural view of an oil well polish rod corrosion prevention device of the present invention;
fig. 2 is a usage state diagram of the present invention.
The labels in the figure are: the device comprises a medicine adding opening 1, a cylinder body 2, a Glan 3, an oil extracting pot 4, a sheath 5, a fixing part 6, a connecting ring 7, a hollow pipe 8 and an oil inlet hole 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 2, the present invention provides a technical solution:
an oil well polish rod anticorrosion device comprises a cylinder body 2, an oil lifting kettle 4, a hollow pipe 8 and a gland 3, wherein a polish rod through center hole is formed in the upper end and the lower end of the cylinder body simultaneously, the gland is of a through tubular structure, a lower port of the gland 3 is welded on the bottom surface of an inner cavity of the cylinder body, the polish rod through center hole in the lower end of the cylinder body is communicated with the gland, the oil lifting kettle 4 comprises an inner pipe, an outer pipe and a connecting ring, the outer diameter of the inner pipe is smaller than the inner diameter of the gland and is equal to the inner diameter of the polish rod through center hole in the lower end of the cylinder body, the inner diameter of the inner pipe is larger than the outer diameter of the polish rod, an annular space is formed between the inner wall of the outer pipe and the outer wall of the gland, the upper end of the outer pipe is connected with the outer end of the connecting ring 7, the, the lower end of the inner pipe is connected with a hollow pipe 8.
The vertical distance from an oil inlet hole 9 of the outer pipe to the lower ring plate is smaller than the height of the Glan 3, the inner diameter of the hollow pipe 8 is larger than the outer diameter of the polished rod, and the outer diameter of the hollow pipe is smaller than the inner diameter of the Glan 3.
A sheath 5 is arranged below the cylinder body, the inner diameter of the sheath is larger than the outer diameter of the hollow pipe, and the line of the sheath is consistent with the axis of the hollow pipe or the polished rod.
The upper end of the cylinder body is also provided with a dosing port 1, and the dosing port is also provided with a turnover type sealing cover.
The polished rod on the upper end of the barrel penetrates through the hole outer port and is further welded with a section of guide pipe, the inner diameter of the guide pipe is larger than the outer diameter of the polished rod, the outer wall of the guide pipe is welded with a fixing part 6, the fixing part is provided with a bolt hole, and the barrel is fixed on a well head through a bolt. It is of course also possible to weld the fixing directly to the wellhead.
And the lower port of the Glan 3 and the bottom surface of the inner cavity at the lower end of the cylinder body are welded into a whole.
The total height of the inner cavity of the barrel body is larger than the sum of the heights of the oil lifting pot and the gland, so that the lower annular plate at the bottom of the oil lifting pot can cross the upper part of the gland, oil flows between the gland and the hollow pipe, and then flows to the outer wall of the polished rod inside the hollow pipe through the radial hollow holes of the hollow pipe.
The barrel is that both ends are sealed from top to bottom, and cavity and axial link up, and the polished rod can move along the axial barrel, and the intracavity that link up at the barrel communicates from top to bottom in proper order and is equipped with: a fixed end, a medicine adding port, a connecting ring, a medicine extracting pot, a contact and a sheath. The inner diameter of the glan is larger than that of the through hole, the top of the glan is open, the bottom of the glan is connected with the sealing plate at the lower end of the cylinder body, the connecting ring is a hollowed steel plate, the middle of the medicine extracting pot is a cylindrical pipe with the length larger than that of the cylinder body and the inner diameter slightly larger than the outer diameter of the polish rod, the surface of the cylindrical pipe is hollowed, the top of the medicine extracting pot is longitudinally connected with the inner hole of the connecting ring, the outer end of the connecting ring is longitudinally connected with an O-shaped pipe. The sheath is welded on the pressure cap of the wellhead packing box, and the inner diameter of the sheath is larger than the outer diameter of the pipe in the middle of the oil extraction box. The polish rod dosing anti-corrosion device is arranged at the lower end of a polished rod eye of the oil pumping unit, when the polish rod runs to a near bottom dead center, a contact touches a wellhead packing box pressing cap to be static, and the polish rod drives a barrel of the polish rod dosing anti-corrosion device to continuously move downwards to cause the oil lifting box to move upwards. When the top of the liquid level in the oil extraction box reaches the top of the Glan, the corrosion inhibitor enters the annular space between the middle hollow pipe of the medicine extraction pot and the Glan and then flows downwards along the polished rod to perform corrosion prevention on the polished rod.
In the process of carrying out polish rod anticorrosion operation by using a polish rod dosing anticorrosion device in an oil well with seriously corroded polish rod, the corrosion inhibitor flows down along the polish rod and coats the polish rod with the corrosion inhibitor, so that an adsorption film is formed on the metal surface of the polish rod, the adsorption film is isolated from external corrosion factors to achieve the anticorrosion effect, well liquid bacteria are effectively prevented from corroding the polish rod, the service life of the polish rod is greatly prolonged, and the service life of a wellhead packing is prolonged. The protective sleeve not only has the function of safety protection, but also can bear a corrosion inhibitor. When the corrosion inhibitor flows down along the polish rod and is stored in the sheath, the corrosion inhibitor can be recovered in time, and clean production is realized. The oil well uses the polish rod dosing anti-corrosion device, so that the production cost of replacing the polish rod is reduced, the clean production of the oil well is maintained, the labor intensity of workers is reduced, and the oil extraction time rate is improved.
The first step is as follows: the polish rod passes through the polish rod and the connecting ring 7 from the oil extracting pot 4; the second step is that: placing the polished rod dosing anti-corrosion device at a proper position, and tightening the fixed end 6; the third step: the sheath 5 is mounted on the wellhead blowout preventer pressure cap. Before the polished rod dosing anti-corrosion device is used, the corrosion inhibitor is firstly added into the barrel body 2 from the dosing port 1, the dosing amount cannot exceed the top surface of the gram 3 in the barrel body 2, and after the dosing is finished, the dosing port 1 is covered, so that the well can be opened for use. In the down-going process of the polish rod of the oil pumping unit, when the lower end face of the hollow pipe 8 contacts the top face of the packing box, the oil lifting kettle 4 takes the medicament to move upwards to be above the top face of the gland 3, the medicament flows into a gap between the polish rod and the oil lifting kettle 4 to moisten the polish rod, when the polish rod goes upwards, the oil lifting kettle 4 goes downwards to the bottom of the barrel body 2 by the dead weight, and the medicament enters the oil lifting kettle 4 through the oil inlet hole 9 in the side wall of the oil lifting kettle.
In the description of the present invention, it should be understood that the orientation indication or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not 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 oil well polish rod anticorrosion device comprises a cylinder body and is characterized by further comprising an oil lifting kettle, a hollow pipe and a gland, wherein polish rod through center holes are formed in the upper end and the lower end of the cylinder body at the same time, the gland is of a through tubular structure, a lower port of the gland is welded on the bottom surface of an inner cavity of the cylinder body, the polish rod through center hole in the lower end of the cylinder body is communicated with the gland, the oil lifting kettle comprises an inner pipe, an outer pipe and a connecting ring, the outer diameter of the inner pipe is smaller than the inner diameter of the gland and is equal to the inner diameter of the polish rod through center hole in the lower end of the cylinder body, the inner diameter of the inner pipe is larger than the outer diameter of the polish rod, an annular space is formed between the inner wall of the outer pipe and the outer wall of the gland, the upper end of the outer pipe is connected with the outer end of the connecting ring, the, the lower end of the inner pipe is connected with a hollow pipe.
2. The oil well polish rod corrosion prevention device of claim 1, wherein a vertical distance from an oil inlet of the outer tube to the lower ring plate is less than a height of the glan, an inner diameter of the hollow tube is greater than an outer diameter of the polish rod, and the outer diameter of the hollow tube is less than the inner diameter of the glan.
3. The oil well polish rod corrosion prevention device according to claim 2, wherein a sheath is arranged below the cylinder, the inner diameter of the sheath is larger than the outer diameter of the hollow pipe, and the line of the sheath is consistent with the axis of the hollow pipe or the polish rod.
4. The oil well polish rod corrosion prevention device according to claim 1, 2 or 3, wherein a chemical feeding port is further formed at the upper end of the cylinder body, and a turnover type sealing cover is further mounted at the chemical feeding port.
5. The polish rod corrosion preventing device for the oil well according to claim 1, 2 or 3, wherein the polish rod at the upper end of the barrel is welded with a guide pipe through the outer port of the hole, the inner diameter of the guide pipe is larger than the outer diameter of the polish rod, a fixing piece is welded on the outer wall of the guide pipe, the fixing piece is provided with a bolt hole, and the barrel is fixed on a wellhead through a bolt.
6. The polish rod corrosion preventing device for an oil well according to claim 1, 2 or 3, wherein the lower port of the gland and the bottom surface of the inner cavity at the lower end of the barrel are welded into a whole.
7. An oil well polish rod corrosion prevention device according to claim 1, 2 or 3, wherein the total height of the inner cavity of said barrel is greater than the sum of the heights of the oil lifting pot and the gland.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920584058.3U CN210033312U (en) | 2019-04-26 | 2019-04-26 | Oil well polished rod corrosion prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920584058.3U CN210033312U (en) | 2019-04-26 | 2019-04-26 | Oil well polished rod corrosion prevention device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210033312U true CN210033312U (en) | 2020-02-07 |
Family
ID=69361955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920584058.3U Expired - Fee Related CN210033312U (en) | 2019-04-26 | 2019-04-26 | Oil well polished rod corrosion prevention device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210033312U (en) |
-
2019
- 2019-04-26 CN CN201920584058.3U patent/CN210033312U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200207 Termination date: 20210426 |