CN216788377U - Sand-proof throttling oil nozzle - Google Patents
Sand-proof throttling oil nozzle Download PDFInfo
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- CN216788377U CN216788377U CN202122429427.1U CN202122429427U CN216788377U CN 216788377 U CN216788377 U CN 216788377U CN 202122429427 U CN202122429427 U CN 202122429427U CN 216788377 U CN216788377 U CN 216788377U
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Abstract
The utility model relates to the field of oilfield self-injection control, in particular to a sand-prevention throttling oil nozzle. Sand control throttle glib talker for install in the glib talker cover on the production tree, include: the nozzle body is provided with a throttling hole, and the throttling hole is used for throttling and depressurizing a flowing liquid flow; the filtering sieve tube is provided with an opening end and a sealing end, and the opening end is connected to the liquid inlet end of the oil nozzle main body and communicated with the throttling hole; the sealing end is of a closed structure and is used for preventing sand grains from entering the filter sieve tube; the outer peripheral surface of the filtering sieve tube is provided with sieve pores for filtering sand grains. The utility model can solve the problem that the production pressure difference is amplified because sand grains easily erode the throttling hole of the oil nozzle in the prior art.
Description
Technical Field
The utility model relates to the field of oilfield self-injection control, in particular to a sand-prevention throttling oil nozzle.
Background
In the process of oil field development, an oil well can adopt self-injection oil extraction in the initial oil extraction stage because of higher stratum energy, and the self-injection oil extraction realizes oil extraction by lifting crude oil from the bottom of the well to the ground by means of stratum pressure. In addition, with the progress of oil field development technology, in order to improve the yield and recovery ratio of an oil well, the gas drive oil extraction is carried out by adopting the technologies of injecting nitrogen, carbon dioxide gas and the like into the oil well, and the self-injection production is also adopted in the initial production stage of the gas drive oil extraction; when the heavy oil is injected with steam for huff and puff oil production, the self-spraying production is also adopted in the initial stage after steam injection and well stewing.
In the stage of self-injection production, according to the difference of oil well pressure and the geological condition of an oil layer, a throttling oil nozzle is required to be installed in an oil nozzle sleeve on a Christmas tree of a well head, a throttling hole is formed in the center of the throttling oil nozzle, the production pressure difference and the yield of the oil well can be controlled, and the production pressure difference, the liquid production and the gas production of the oil well are controlled within a reasonable range.
However, in the stage of the flowing production, due to the geological structure of the oil layer, the cementation of some rock particles of the oil layer is looser, the sand is easy to generate in the stratum in the process of the flowing production of the oil well, particularly, the production pressure difference is larger, the flowing yield is higher, and the sand is easy to generate in the process of the flowing production of the oil well in which the rock structure of the stratum is cemented and loosened. When high-pressure and high-speed liquid flow in the oil well carries sand grains to pass through the oil nozzle, the sand grains are easy to erode the throttling hole of the oil nozzle, the diameter of the oil nozzle is larger, the production pressure difference of the oil well is not artificially amplified, the production pressure difference is amplified, sand production of the oil well is aggravated, and vicious circle is formed. The sand production of the oil well can damage the geological structure of the oil layer, cause the faults of sand setting of a shaft, even collapse of the oil layer and the like, increase the workload of sand washing and sand prevention maintenance operation of the oil well, influence the normal production of the oil well, reduce the yield of the oil well and even shorten the service life of the oil well.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a sand-prevention throttling oil nozzle, which solves the problem that in the prior art, sand particles easily erode a throttling hole of the oil nozzle, so that the production pressure difference is amplified.
The utility model adopts the following technical scheme:
the sand-prevention throttling oil nozzle is used for being installed in an oil nozzle sleeve on a Christmas tree and comprises an oil nozzle main body, wherein a throttling hole is formed in the oil nozzle main body and is used for throttling and depressurizing flowing liquid flow; the filter sieve tube is provided with an opening end and a sealing end, and the opening end is connected to the liquid inlet end of the oil nozzle main body and communicated with the throttling hole; the sealing end is of a closed structure and is used for preventing sand grains from entering the filter sieve tube; the outer peripheral surface of the filtering sieve tube is provided with sieve pores for filtering sand grains.
Has the advantages that: by adopting the technical scheme, the filtering sieve tube is arranged on the oil nozzle main body, and the sieve pores arranged on the outer peripheral surface of the filtering sieve tube can filter sand grains, so that the sand grains are prevented from entering the throttling hole in the oil nozzle main body, and further, the sand grains are prevented from eroding the throttling hole to cause the production pressure difference to be amplified; meanwhile, the opening end of the filtering sieve tube is connected with the liquid inlet end of the oil nozzle main body, so that the sealing end of the filtering sieve tube is directly impacted by liquid flow, and the sealing end of the filtering sieve tube is of a closed structure, so that sand can be effectively prevented from directly entering the filtering sieve tube under the action of the liquid flow, and a good filtering effect is ensured.
Further: the end face of the sealing end of the filtering sieve tube is an inclined plane or an arc-shaped surface.
Has the beneficial effects that: by adopting the technical scheme, the end face of the sealing end can play a role in guiding flow, and large disturbance to liquid flow is avoided.
Further: the end face of the sealing end is a spherical surface to form a hemispherical structure.
Has the advantages that: by adopting the technical scheme, the processing is convenient, and the flow guide effect is good.
Further: the filtering sieve tube is detachably connected to the oil nozzle main body.
Has the advantages that: the manufacturing of the filtering sieve tube is convenient by adopting the technical scheme.
Further: the filter sieve tube is provided with external threads, the liquid inlet end of the oil nozzle main body is provided with a threaded hole, and the filter sieve tube is in threaded connection with the oil nozzle main body.
Has the advantages that: by adopting the technical scheme, the filtering sieve tube is convenient to process and assemble.
Further: the oil nozzle is characterized in that a counter bore is formed in the end face of the liquid inlet end of the oil nozzle main body, and an internal thread is formed in the inner wall of the counter bore to form the threaded hole.
Further: after the filtering sieve tube is installed in place on the oil nozzle main body, a distance is reserved between the end face of the opening end of the filtering sieve tube and the bottom wall of the counter bore.
Has the advantages that: by adopting the technical scheme, the thread of the filter screen pipe can be ensured to be completely screwed into the oil nozzle main body, and the mounting reliability of the filter screen pipe on the oil nozzle main body is favorably improved.
Further: the sieve holes are uniformly arranged at intervals along the circumferential direction of the filtering sieve tube.
Further: and the outer peripheral surface of the oil nozzle main body is provided with external threads for being in threaded connection with the oil nozzle sleeve.
Further, the method comprises the following steps: the throttling hole is an equal-diameter through hole formed in the oil nozzle body.
Has the advantages that: by adopting the technical scheme, the throttling hole is convenient to process, and the structure is simple.
Drawings
FIG. 1 is a schematic structural diagram of a sand control throttling oil nozzle in the utility model;
fig. 2 is a sectional view of the sand control throttling nipple of fig. 1.
The names of the components corresponding to the corresponding reference numerals in the drawings are: 10. a nozzle body; 11. an external threaded section; 12. stopping the shaft shoulder; 13. an operation section; 14. clamping a plane; 15. an orifice; 16. a counter bore; 20. filtering the sieve tube; 21. an open end; 22. sealing the end; 23. and (4) screening holes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, in the embodiments of the present invention, terms such as "first" and "second" may be used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the appearances of the phrase "comprising an … …" or similar limitation may be present without necessarily excluding the presence of additional identical elements in the process, method, article, or apparatus that comprises the same elements.
In the description of the utility model, unless expressly stated or limited otherwise, the terms "mounted", "connected" and "connected" when used in this context are to be construed broadly, as for example they may be fixedly connected, releasably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be connected internally or indirectly to each other. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Embodiment 1 of the sand control throttling nipple of the present invention:
as shown in fig. 1 and 2, the sand control throttling nozzle comprises a nozzle body 10 and a filter screen 20, which are integrally installed in a nozzle sleeve of a christmas tree, and are used for throttling and depressurizing the flowing liquid flow by means of a throttling hole 15 in the center of the nozzle body, so as to control the flowing pressure, further control the production pressure difference and the yield of an oil well, and control the production pressure difference, the liquid production and the gas production of the oil well within a reasonable range. The whole oil nozzle sleeve on the Christmas tree is a sleeve body, the inner wall is provided with internal threads, and the oil nozzle main body 10 provided with external threads on the outer peripheral surface is in threaded connection and fixation. The structure of the oil nozzle sleeve is the prior art and is not described in detail here.
The nozzle body 10 includes an externally threaded section 11, a stop shoulder 12, and an operating section 13. The external thread section 11 is provided with external threads for connecting to a nozzle body casing as a liquid inlet end of the nozzle body 10. The stop shoulder 12 is used for limiting the connection position of the oil nozzle body 10 on the oil nozzle sleeve, and forms a stop with the orifice edge of the threaded hole on the oil nozzle sleeve, so as to ensure the firm fixation of the oil nozzle sleeve. The operating section 13 is provided with a clamping plane 14 for applying torque to the nozzle body 10; meanwhile, the end of the operation section 13 forms the liquid outlet end of the nozzle body 10. The axial center of the nozzle body 10 is provided with a through hole of equal diameter to form a throttle hole 15. In addition, a counter bore 16 is provided on the end face of the external thread section 11 of the nozzle body 10, and an internal thread is provided on the inner wall of the counter bore 16 to form a threaded hole for mounting and fixing the filter screen 20.
The filtering sieve tube 20 is provided with an opening end 21 and a sealing end 22, wherein the opening end 21 is provided with external threads and is used for being connected to the liquid inlet end of the oil nozzle body 10 in a threaded mode and communicated with the throttling hole 15; the closed end 22 is a blind end, and the end surface thereof is a spherical surface, forming a hemispherical closed structure for preventing sand from directly entering the filter screen 20 along with the liquid flow. The outer circumferential surface of the filtering screen 20 is provided with screen holes 23, and the screen holes 23 are uniformly spaced along the circumference of the filtering screen 20 and used for filtering sand. To ensure an improved filtering efficiency, the sieve holes 23 are arranged at regular intervals along the circumference of the filtering sieve tube 20. In order to ensure the reliable fixation of the filter screen 20, the length of the thread segment on the filter screen 20 is smaller than the depth of the counter bore 16 on the nozzle body 10, after the filter screen 20 is installed on the nozzle body 10, a distance is formed between the end surface of the open end 21 of the filter screen 20 and the bottom wall of the counter bore 16, and meanwhile, the distance can form a liquid flow buffer space.
During installation: firstly, stopping an oil well, closing the flow, emptying and relieving pressure, and then removing a nipple plug; then, the sand-proof throttling oil nozzle is installed in an oil nozzle sleeve through an oil nozzle wrench; and then installing an oil nozzle sleeve plug, recovering the flow and opening the well for production. During the self-spraying production process of the oil well, the produced liquid of the oil well passes through the sieve holes 23 of the filtering sieve tube 20 and then enters the throttling hole 15 on the throttling oil nozzle to be discharged. When the oil well production liquid passes through the filtering sieve tube 20, sand grains or other sundries with the diameter larger than that of the sieve holes 23 can be blocked, the blocked sand grains or other sundries are deposited in the oil tube at the rear end of the oil nozzle sleeve, and the sand grains deposited in the oil tube can be cleaned out during regular inspection, so that the situation that the inner diameter of the throttle hole 15 is enlarged due to the fact that the throttle hole 15 is eroded when the sand grains pass through the throttle hole 15 of the throttle oil nozzle, the production pressure difference of the oil well is amplified artificially is avoided, further vicious circle can be avoided, the sand production of the oil well is serious, the oil layer structure is damaged, and the problems that the maintenance operation cost of the oil well is increased and the service life of the oil well is shortened due to the fact that the sand grains are further formed can be avoided.
Embodiment 2 of the sand control throttling oil nozzle of the present invention:
the difference between the present embodiment and embodiment 1 is that in embodiment 1, the end surface of the sealed end 22 of the filter screen 20 is spherical; in this embodiment, the sealing end 22 is a tapered structure, and the end surface is an inclined surface.
Embodiment 3 of the sand control throttling nipple of the present invention:
the present embodiment is different from embodiment 1 in that, in embodiment 1, the filter screen 20 is detachably connected to the nozzle body 10; in this embodiment, the filter screen 20 is welded to the nozzle body 10. In other embodiments, the filter screen 20 is integral with the nozzle body 10.
Example 4 of the sand control throttling nipple of the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, the filter screen 20 is screwed to the nozzle body 10; in this embodiment, the filter screen 20 is connected to the nozzle body 10 by a connection flange.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all equivalent structural changes made by using the contents of the specification and the drawings of the present invention should be covered by the scope of the present invention.
Claims (10)
1. The sand-prevention throttling oil nozzle is used for being installed in an oil nozzle sleeve on a Christmas tree and is characterized by comprising an oil nozzle main body (10), wherein a throttling hole (15) is formed in the oil nozzle main body (10), and the throttling hole (15) is used for throttling and depressurizing flowing liquid flow; the oil nozzle also comprises a filtering sieve pipe (20), wherein the filtering sieve pipe (20) is provided with an opening end (21) and a sealing end (22), the opening end (21) is connected to the liquid inlet end of the oil nozzle main body (10) and is communicated with the throttling hole (15); the sealing end (22) is of a closed structure and is used for preventing sand from entering the filtering sieve tube (20); the outer peripheral surface of the filtering sieve tube (20) is provided with sieve pores (23) for filtering sand grains.
2. The choke plug as claimed in claim 1, wherein the end face of the closed end (22) of the filter screen (20) is a beveled or curved surface.
3. The sand control throttling oil nozzle according to claim 2, wherein the end surface of the sealing end (22) is a spherical surface to form a hemispherical structure.
4. The sandproof choke nipple of claim 1, 2 or 3, characterized in that the filter screen (20) is detachably attached to the nipple body (10).
5. The sand-control throttling oil nozzle according to claim 4, characterized in that the filtering sieve tube (20) is provided with external threads, the liquid inlet end of the oil nozzle main body (10) is provided with a threaded hole, and the filtering sieve tube (20) is in threaded connection with the oil nozzle main body (10).
6. The sand-control throttling oil nozzle according to claim 5, characterized in that a counter bore (16) is arranged on the end face of the liquid inlet end of the oil nozzle main body (10), and an internal thread is arranged on the inner wall of the counter bore (16) to form the threaded hole.
7. The sandproof choke nipple of claim 6, characterized in that the filter screen (20) is mounted in place on the nipple body (10) with a gap between the end face of the open end (21) of the filter screen (20) and the bottom wall of the counterbore (16).
8. The sandproof choke assembly according to claim 1, 2 or 3, wherein the screen holes (23) are uniformly spaced along the circumference of the filter screen (20).
9. The sand control throttling oil nozzle according to claim 1, 2 or 3, characterized in that the outer peripheral surface of the oil nozzle main body (10) is provided with external threads for being screwed into an oil nozzle sleeve.
10. The sand control throttling oil nozzle according to claim 1, 2 or 3, characterized in that the throttling hole (15) is a constant diameter through hole formed on the oil nozzle body (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122429427.1U CN216788377U (en) | 2021-10-09 | 2021-10-09 | Sand-proof throttling oil nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122429427.1U CN216788377U (en) | 2021-10-09 | 2021-10-09 | Sand-proof throttling oil nozzle |
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| Publication Number | Publication Date |
|---|---|
| CN216788377U true CN216788377U (en) | 2022-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122429427.1U Active CN216788377U (en) | 2021-10-09 | 2021-10-09 | Sand-proof throttling oil nozzle |
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| CN (1) | CN216788377U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115874994A (en) * | 2023-02-21 | 2023-03-31 | 四川宏大安全技术服务有限公司 | Oil nozzle combination device for gas production |
-
2021
- 2021-10-09 CN CN202122429427.1U patent/CN216788377U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115874994A (en) * | 2023-02-21 | 2023-03-31 | 四川宏大安全技术服务有限公司 | Oil nozzle combination device for gas production |
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