CN219101304U - Underground environmental control cleaning device - Google Patents
Underground environmental control cleaning device Download PDFInfo
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- CN219101304U CN219101304U CN202320198333.4U CN202320198333U CN219101304U CN 219101304 U CN219101304 U CN 219101304U CN 202320198333 U CN202320198333 U CN 202320198333U CN 219101304 U CN219101304 U CN 219101304U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The utility model belongs to the technical field of crude oil exploitation equipment, and discloses an underground environmental control cleaning device, which comprises an upper joint, a central pipe and a lower joint which are connected sequentially through threads; an outer circle at the lower end of the upper joint is connected with an outer cylinder through threads, a reset spring is arranged between the central tube and the outer cylinder, a sealing sleeve is arranged at the lower end of the outer cylinder through internal threads, a sliding sleeve movably sleeved at the outer side of the central tube is arranged at the inner side of the sealing sleeve, and the upper end of the sliding sleeve is contacted with the lower end face of the reset spring; the outside of the sealing sleeve is provided with a plurality of liquid flow holes, the lower end of the sealing sleeve is provided with a fixing sleeve through internal threads, and the lower end of the fixing sleeve is connected with the outside of the lower joint. The utility model can form an oil sleeve annulus when in hot washing, and establishes a flow passage between the oil pipe and the annulus through the liquid flow holes arranged on the device, thereby effectively solving the problems of low hot washing return quantity, large leakage quantity, long hot washing operation time and the like, simultaneously avoiding the hot washing liquid from flowing backwards into an oil layer, causing reservoir pollution and the like, and greatly saving resources and oilfield operation cost.
Description
Technical Field
The utility model belongs to the technical field of crude oil exploitation equipment, and particularly relates to an underground environmental control cleaning device.
Background
At present, in the crude oil exploitation process, along with the decline of formation pressure and temperature, the dissolution ability of crude oil to wax begins to decline, substances such as paraffin, colloid and asphaltene that dissolve in crude oil are very easily diluted and separated out, and condense on oil-well pump, sucker rod and pipe wall, and then very easily cause the pumping unit load to increase, the fault rate increases, the oil well output decline, the pump efficiency reduces, serious result sucker rod card pump, oil pipe blocks up, very big influence oil recovery efficiency, reduced the oil well and exempted from to repair the period, and well repair cost increases.
In order to solve the problem of wax deposition of the oil well, the conventional hot washing wax removal process is adopted to carry out the cleaning operation of the wax in the well, the wax removal process has good application effect on the common oil well, but for some oil wells with special working conditions such as intermittent liquid discharge, high gas production, high sleeve pressure and the like, when the conventional hot washing wax removal process is adopted, the hot washing vehicle cannot establish effective shaft circulation, so that the conventional hot washing vehicle can only be used for carrying out the shaft hot washing, but the problems of low hot washing return amount, large leakage amount, oil layer pollution and the like exist, and along with the development of the oil well, the oil wells with the special working conditions are more and more, and a novel hot washing process or device is needed to be provided in an urgent way so as to reduce the cost of the oil field.
Through the above analysis, the problems and defects existing in the prior art are as follows: for some oil wells with special working conditions such as intermittent liquid outlet, high gas production and the like, when the conventional hot washing wax removing operation is adopted, the hot washing vehicle cannot establish effective shaft circulation, and the conventional hot washing vehicle can only be used for hot washing the shaft, so that the problems of low hot washing return quantity, large leakage quantity, oil layer pollution and the like exist.
Disclosure of Invention
Aiming at the problems existing in the prior art, the utility model provides an underground environment-control cleaning device.
The utility model is realized in such a way that the underground environmental control cleaning device is provided with:
an upper joint, a central tube and a lower joint;
the central pipe is a threaded nipple with a plurality of liquid passing holes at the lower end, and coupling internal threads which are matched and connected with the central pipe are respectively arranged in pipe orifices at the lower end of the upper joint and the upper end of the lower joint;
an outer circle at the lower end of the upper joint is connected with an outer cylinder through threads, a reset spring is arranged in an annular space between the central tube and the outer cylinder, a sealing sleeve is arranged at the lower end of the outer cylinder through internal threads, a sliding sleeve movably sleeved at the outer side of the central tube is arranged at the inner side of the sealing sleeve, and the upper end of the sliding sleeve is in contact with the lower end face of the reset spring;
the outside of the sealing sleeve is provided with a plurality of liquid flow holes, the lower end of the sealing sleeve is provided with a fixing sleeve through internal threads, and the lower end of the fixing sleeve is connected with the outside of the lower joint.
Further, a first sealing ring is arranged at the connection position of the upper connector and the outer cylinder, a second sealing ring is arranged at the connection position of the outer cylinder and the sealing sleeve, a third sealing ring is arranged on the inner wall of the sealing sleeve, and a fourth sealing ring is arranged at the connection position of the sealing sleeve and the fixed sleeve.
Further, an inner step hole is formed in the lower end of the fixed sleeve, and a fifth sealing ring is installed between the inner side of the inner step hole and the lower connector.
Further, the pressure-resistant sealing component is arranged at the lower end of the inner side of the sealing sleeve, and the lower end of the sliding sleeve is of a conical structure and is matched with the pressure-resistant sealing component.
Further, the leather cup is installed on the outer circumference outside of the lower joint through the step surface, the upper end of the leather cup is provided with a V-shaped opening, the lower end of the leather cup is provided with the connecting sleeve through the sawtooth structure, and the outer side of the connecting position of the leather cup and the connecting sleeve is sleeved with the pressing sleeve.
Further, the outer side of the lower joint is provided with a lower fixing ring through threads, the lower fixing ring is positioned at the lower end of the connecting sleeve, and the outer side of the lower fixing ring is provided with a second set screw.
Further, the inner end of the pipe orifice of the upper joint is provided with a coupling internal thread, and the tail end of the lower joint is provided with an oil pipe thread.
Further, an upper fixing ring is arranged in the middle of the outer side of the upper joint through threads, and a first set screw is arranged on the upper fixing ring.
In combination with the technical scheme and the technical problems to be solved, the technical scheme to be protected has the following advantages and positive effects:
firstly, for oil wells with special working conditions of intermittent liquid discharge, high gas production, high casing pressure and the like of some oil wells, the utility model can be arranged at any well-flushing and paraffin removal position above an oil well pump, and well-flushing liquid is sealed at the upper end of the utility model by establishing an oil casing annulus, so that the dosage of the well-flushing liquid and heat loss are greatly reduced, and the single well-flushing efficiency is improved. The specific description is as follows:
according to the utility model, an oil sleeve annulus can be formed during hot washing, well washing liquid is sealed at the upper end of the oil sleeve annulus, and a flow passage between an oil pipe and the annulus is established through a liquid flow hole arranged on the device, so that the problems of low hot washing return quantity, large leakage quantity, long hot washing operation time and the like are effectively solved;
secondly, the utility model is arranged above the oil pump, so that the phenomenon that hot washing liquid flows backward into an oil layer to pollute a reservoir is avoided, and the resource and the oil field operation cost are greatly saved.
Drawings
FIG. 1 is a schematic structural diagram of a downhole environmental control cleaning device according to an embodiment of the present utility model;
in the figure: 1. an upper joint; 2. an upper fixing ring; 3. a first set screw; 4. a first seal ring; 5. an outer cylinder; 6. a return spring; 7. a central tube; 8. a second seal ring; 9. sealing sleeve; 10. a third seal ring; 11. a sliding sleeve; 12. a pressure-resistant seal group; 13. a fourth seal ring; 14. a fixed sleeve; 15. a fifth seal ring; 16. a lower joint; 17. a leather cup; 18. a compacting sleeve; 19. connecting sleeves; 20. a second set screw; 21. and a lower fixing ring.
Detailed Description
The present utility model will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In order to fully understand how the utility model may be embodied by those skilled in the art, this section is an illustrative embodiment in which the claims are presented for purposes of illustration.
As shown in fig. 1, the underground environmental control cleaning device provided by the embodiment of the utility model includes: the upper joint 1, the upper fixing ring 2, the first set screw 3, the first sealing ring 4, the outer cylinder 5, the reset spring 6, the central tube 7, the second sealing ring 8, the sealing sleeve 9, the third sealing ring 10, the sliding sleeve 11, the pressure-resistant sealing group 12, the fourth sealing ring 13, the fixing sleeve 14, the fifth sealing ring 15, the lower joint 16, the leather cup 17, the pressing sleeve 18, the connecting sleeve 19, the second set screw 20 and the lower fixing ring 21.
The inner end of the pipe orifice of the upper joint 1 is provided with a coupling internal thread for connecting the device with a downhole pipe column at the upper end of the device; the circumference of the upper joint 1 is also provided with threads for installing an upper fixing ring 2; the upper fixing ring 2 is provided with a first set screw 3 for fixing and limiting the upper fixing ring 2;
the outer circle of the lower end of the upper joint 1 is also provided with external threads for connecting with the upper end of the outer cylinder 5; the upper joint 1 is also provided with a first sealing ring 4, and a static seal is formed between the first sealing ring 4 and the inner wall of the outer cylinder 5 so as to seal the upper end of the device;
the pipe orifice at the lower end of the upper joint 1 is also provided with a coupling internal thread for installing the upper end of the central pipe 7; the central tube 7 is a threaded nipple with a plurality of liquid passing holes at the lower end; after being connected with the upper joint 1, the central tube 7 forms an annular space with the outer cylinder 5, and the space is used for placing the return spring 6;
the lower end of the outer cylinder 5 is also provided with an internal thread for installing a sealing sleeve 9; the sealing sleeve 9 is provided with a liquid flow hole, and is also provided with a second sealing ring 8, a third sealing ring 10 and a fourth sealing ring 13, wherein the second sealing ring 8 and the lower end of the outer cylinder 5 form a static seal; a dynamic seal is formed between the third sealing ring 10 and the sliding sleeve 11;
the upper end surface of the sliding sleeve 11 is contacted with the end surface of the return spring 6, and the return spring 6 is in a compressed state; the lower end of the sliding sleeve 11 is designed into a cone shape and is matched with the pressure-resistant sealing assembly 12 to form a sealing surface with wear resistance and pressure resistance; meanwhile, the pressure-resistant sealing component 12 is placed and limited at the lower end of the inner side of the sealing sleeve 9;
the lower end of the sealing sleeve 9 is also provided with an internal thread for installing a fixed sleeve 14, and the inner hole of the sealing sleeve 9 is matched with the fourth sealing ring 13 to form a sealing surface; the lower end of the fixed sleeve 14 is processed into an inner step hole for installing a lower joint 16 provided with a fifth sealing ring 15; the fifth sealing ring 15 is matched with the inner hole wall of the fixed sleeve 14 to form a seal; meanwhile, an internal hoop thread is processed at the upper end of the lower joint 16 and is used for connecting the lower end of the central tube 7;
the outer circumference of the lower joint 16 is provided with a step surface for positioning the installation of the leather cup 17; the leather cup 17 is made of injection molded polymer rubber material, the upper end is a V-shaped opening, the lower end is provided with a saw tooth structure, a connecting sleeve 19 is arranged in the saw tooth structure, and the upper end of the connecting sleeve 19 is also provided with a saw tooth structure which is meshed with saw teeth of the leather cup 17; the pressing sleeve 18 is used as a sheath and sleeved on the outer circle of the leather cup 17 and the connecting sleeve 19 to form a whole; the leather cup 17, the compression sleeve 18 and the connecting sleeve 19 are compressed on the step shaft of the lower joint 16 through the screwing of the lower fixing ring 21 and the lower joint 16; finally, the lower fixing ring 21 is subjected to limit fixing through the fixing of the second set screw 20; the tail end of the lower sub 16 is also threaded for connection of the device to a lower tubular string at its lower end.
The working principle of the utility model is as follows:
the underground environmental control cleaning device provided by the utility model is mainly arranged above an oil pump and a working fluid level. When the oil casing is installed in a well, the V-shaped opening at the upper end of the packing cup 17 is in direct contact with the inner wall of the casing, so that the primary seal of the oil casing annulus is formed;
when the well flushing operation is not needed, the device can be used as an oil pipe nipple, and the oil extraction operation is normally carried out;
when the hot washing operation is needed, well washing liquid is injected into the well from the oil sleeve annulus until the well washing liquid flows to the installation position of the device; the V-shaped opening at the upper end of the upper leather cup 17 of the device is outwards opened under the pressure of well flushing liquid, is contacted with the inner wall of the casing and is subjected to pressure setting, so that the annular space of the oil casing forms a short-circuit annular space;
through further continuous pressurization, well flushing liquid enters through liquid flow holes on the sealing sleeve 9, under the combined action of the third sealing ring 10, the pressure-resistant sealing assembly 12 and the fourth sealing ring 13, the liquid flow pressure pushes the sliding sleeve 11 to move upwards, and as the upper end surface of the sliding sleeve 11 is contacted with the end surface of the return spring 6, the return spring 6 is continuously compressed until the sliding sleeve 11 slides to a certain stroke, a plurality of flow holes machined on the central tube 7 are leaked outwards, and further liquid enters the central tube from the flow holes of the central tube 7, namely the well flushing liquid enters an oil tube from the inside of an oil sleeve annulus; because the well flushing liquid is continuously injected into the oil sleeve annulus, the sliding sleeve 11 cannot be reset under the condition that the pressure is not reduced, and the liquid flow hole on the sealing sleeve 9 and the overflow hole on the central tube 7 form a continuous channel, so that the well flushing liquid can continuously enter the oil pipe from the oil sleeve annulus.
Because the device is arranged above the oil pump, the well flushing liquid entering the oil pipe seals the valve assembly in the oil pump above the oil pump, so that the well flushing liquid cannot flow backward into the bottom of the well, and the reservoir is protected from being polluted;
with the increase of injected well flushing liquid, the well flushing liquid flows from the inside of the oil pipe to the wellhead under the combined action of pressure and flow, and can not flow back to the oil sleeve annulus again from the inside of the device due to the actions of the first sealing ring 4 and the second sealing ring 8, at the moment, the whole equipment is in a working state completely, wax and scale formed on the inner wall of the oil pipe are cleaned under the action of pressure, and along with the flowing of the well flushing liquid, the cleaned wax and scale are sprayed out from the wellhead together with the well flushing liquid, and the well flushing liquid is circulated and reciprocated in such a way, so that the thermal cleaning operation of a downhole tubular column is achieved, and when the liquid flowing out from a certain well opening is suddenly clear, the well flushing is indicated to be close to completion, and the well flushing can be finished.
When the well flushing is finished, the injection of the well flushing liquid into the oil sleeve annulus is stopped, the pressure is reduced, the sliding sleeve 11 is restored to the original position under the action of the return spring 6, the through-flow channel on the central tube 7 is closed, the device can be restored to the initial installation state again, and normal oil extraction can be performed; the leather cup 17 is free to shrink under the condition of no flushing fluid pressure, the state of compaction and setting with the inner wall of the casing is released, when casing gas is generated in the annulus below the installation position of the device, the leather cup 17 can be inwards tightened under the continuous upward pressure effect of the casing gas, the annulus is opened, and the normal exhaust is realized.
In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The foregoing is merely illustrative of specific embodiments of the present utility model, and the scope of the utility model is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present utility model will be apparent to those skilled in the art within the scope of the present utility model.
Claims (8)
1. An underground environmental control cleaning device is characterized in that the underground environmental control cleaning device is provided with:
an upper joint, a central tube and a lower joint;
the central pipe is a threaded nipple with a plurality of liquid passing holes at the lower end, and coupling internal threads which are matched and connected with the central pipe are respectively arranged in pipe orifices at the lower end of the upper joint and the upper end of the lower joint;
an outer circle at the lower end of the upper joint is connected with an outer cylinder through threads, a reset spring is arranged in an annular space between the central tube and the outer cylinder, a sealing sleeve is arranged at the lower end of the outer cylinder through internal threads, a sliding sleeve movably sleeved at the outer side of the central tube is arranged at the inner side of the sealing sleeve, and the upper end of the sliding sleeve is in contact with the lower end face of the reset spring;
the outside of the sealing sleeve is provided with a plurality of liquid flow holes, the lower end of the sealing sleeve is provided with a fixing sleeve through internal threads, and the lower end of the fixing sleeve is connected with the outside of the lower joint.
2. The downhole environmental cleaning apparatus of claim 1, wherein a first seal ring is installed at a connection position of the upper joint and the outer cylinder, a second seal ring is installed at a connection position of the outer cylinder and the sealing sleeve, a third seal ring is installed on an inner wall of the sealing sleeve, and a fourth seal ring is installed at a connection position of the sealing sleeve and the fixing sleeve.
3. The underground environment-friendly cleaning device as claimed in claim 1, wherein the lower end of the fixing sleeve is provided with an inner step hole, and a fifth sealing ring is arranged between the inner side of the inner step hole and the lower joint.
4. The downhole environmental cleaning apparatus of claim 1, wherein the seal sleeve has a pressure-resistant seal assembly at a lower end of an inner side thereof, and the slide sleeve has a tapered structure at a lower end thereof and is matched with the pressure-resistant seal assembly.
5. The underground environment-friendly cleaning device according to claim 1, wherein a leather cup is arranged on the outer side of the outer circumference of the lower joint through a step surface, the upper end of the leather cup is provided with a V-shaped opening, the lower end of the leather cup is provided with a connecting sleeve through a sawtooth structure, and a pressing sleeve is sleeved on the outer side of the connecting position of the leather cup and the connecting sleeve.
6. The downhole environmental cleaning apparatus of claim 5, wherein a lower fixing ring is mounted on the outer side of the lower joint through threads, the lower fixing ring is located at the lower end of the connecting sleeve, and a second set screw is mounted on the outer side of the lower fixing ring.
7. The downhole environmental control cleaning apparatus of claim 1, wherein the inner end of the upper joint pipe orifice is provided with a coupling internal thread, and the tail end of the lower joint is provided with an oil pipe thread.
8. The downhole environmental control cleaning apparatus of claim 1, wherein an upper retaining ring is threadably mounted in the middle of the outer side of the upper joint, and a first set screw is mounted on the upper retaining ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320198333.4U CN219101304U (en) | 2023-02-13 | 2023-02-13 | Underground environmental control cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320198333.4U CN219101304U (en) | 2023-02-13 | 2023-02-13 | Underground environmental control cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219101304U true CN219101304U (en) | 2023-05-30 |
Family
ID=86457529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320198333.4U Active CN219101304U (en) | 2023-02-13 | 2023-02-13 | Underground environmental control cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219101304U (en) |
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2023
- 2023-02-13 CN CN202320198333.4U patent/CN219101304U/en active Active
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