CN216429581U - Anti-abrasion pup joint and fracturing string - Google Patents
Anti-abrasion pup joint and fracturing string Download PDFInfo
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- CN216429581U CN216429581U CN202122320088.3U CN202122320088U CN216429581U CN 216429581 U CN216429581 U CN 216429581U CN 202122320088 U CN202122320088 U CN 202122320088U CN 216429581 U CN216429581 U CN 216429581U
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Abstract
The utility model relates to an abrasionproof nipple joint and fracturing string. The anti-abrasion short section is provided with a central flow passage, the diameter of a liquid inlet of the central flow passage is larger than that of a liquid outlet of the central flow passage, an internal thread is arranged on the anti-abrasion short section corresponding to the liquid inlet, an external thread is arranged on the anti-abrasion short section corresponding to the liquid outlet, the anti-abrasion short section is in threaded connection with an oil pipe through the internal thread, and the anti-abrasion short section is in threaded connection with an upper joint of a packer through the external thread; wherein, the diameter of liquid outlet is less than or equal to the internal diameter of center tube. Abrasionproof nipple joint threaded connection is between the top connection of oil pipe and packer, when fracturing construction, in the fracturing fluid in the oil pipe passes through the inlet and gets into the abrasionproof nipple joint, because the diameter of liquid outlet is less than or equal to the internal diameter of center tube, like this, the fracturing fluid of flowing out from the liquid outlet is difficult to strike on the up end of center tube, reduces the erosion and abrasion that the up end of center tube received, guarantees the joint strength of screw thread, avoids the emergence of serious accidents such as center tube dropout, instrument well fall.
Description
Technical Field
The utility model belongs to the technical field of petroleum pipeline, concretely relates to abrasionproof nipple joint and fracturing string.
Background
The packer is a matched tool for the operations of measures such as layered fracturing, acidification, water injection and the like of an oil-gas field, and has the function of sealing and isolating an annular space between an oil pipe at the depth position and a casing pipe, so that liquid with higher pressure can smoothly enter a stratum according to a preset channel. In recent years, the packer has the advantages of simple structure, convenient construction, reliable sealing, safe pulling-out and the like, meets the requirements of acid fracturing construction processes of medium and deep wells, and is widely applied to various oil fields.
In the prior art, as shown in fig. 1, a packer 16 is connected to an oil pipe 11, the packer 16 includes a central pipe 20 and an upper joint 19, a lower end of the upper joint 19 is sleeved on an upper end of the central pipe 20, the upper joint 19 is in threaded connection with the central pipe 20, an upper end of the upper joint 19 has internal threads, the upper joint 19 is in threaded connection with the oil pipe 11, and an inner diameter of the central pipe 20 is smaller than an inner diameter of the connecting oil pipe 11. When fracturing construction is carried out, a high-speed flowing sand-carrying fluid can directly impact the upper end face of the central pipe, particularly under the working conditions of sand acid fracturing, high discharge capacity, high pressure, large sand amount and long period, the erosion abrasion of the corrosive liquid and the high-speed sand-carrying fluid to the upper end face of the central pipe of the packer can be stronger, the thickness of the part is reduced, the connection strength of screw threads is weakened, serious accidents such as central pipe tripping and tool well falling are easily caused, and the continuous and safe development of the fracturing construction is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an abrasionproof nipple joint to when solving among the prior art fracturing construction, the technical problem of center tube up end erosion and wear easily. An object of the utility model is also to provide a fracturing string.
In order to achieve the above object, the utility model discloses the technical scheme of abrasionproof nipple joint is:
the anti-abrasion short section is provided with a central flow passage, the diameter of a liquid inlet of the central flow passage is larger than that of a liquid outlet of the central flow passage, an internal thread is arranged on the anti-abrasion short section corresponding to the liquid inlet, an external thread is arranged on the anti-abrasion short section corresponding to the liquid outlet, the anti-abrasion short section is in threaded connection with an oil pipe through the internal thread, and the anti-abrasion short section is in threaded connection with an upper joint of the packer through the external thread; wherein the diameter of the liquid outlet is smaller than or equal to the inner diameter of the central tube.
The beneficial effects are that: one end of the anti-abrasion short section, which is provided with the liquid inlet, is in threaded connection with the oil pipe, and the other end of the anti-abrasion short section, which is provided with the liquid outlet, is in threaded connection with an upper joint of the packer; when fracturing construction, fracturing fluid in the oil pipe enters the anti-abrasion short section through the liquid inlet, and the diameter of the liquid outlet is smaller than or equal to the inner diameter of the central pipe, so that the fracturing fluid flowing out of the liquid outlet is not easy to impact on the upper end face of the central pipe, erosion and abrasion on the upper end face of the central pipe are reduced, the connection strength of screw threads is ensured, and serious accidents such as central pipe tripping and tool well falling are avoided.
As a further improvement, the central flow passage comprises a large hole section, a hole expanding section and a small hole section, the hole expanding section is arranged between the large hole section and the small hole section, the liquid inlet is arranged on the large hole section, and the liquid outlet is arranged on the small hole section.
The beneficial effects are that: due to the design, the reaming section has a certain buffering effect on fluid, and the impact force of the fluid on the anti-abrasion short section is reduced.
As a further improvement, the anti-abrasion short section comprises a large-diameter section and a small-diameter section, the large-diameter section is provided with a large hole section, a hole expanding section and a part of small hole section, and the small-diameter section is provided with the rest small hole section.
The beneficial effects are that: design like this, increase the thickness that corresponds reaming section department on the abrasionproof nipple joint, improve the life of abrasionproof nipple joint.
As a further improvement, the reaming section is a conical section.
The beneficial effects are that: the design is convenient for processing.
As a further improvement, the internal thread and the external thread on the anti-abrasion short section are both taper pipe threads.
The beneficial effects are that: by the design, the connection strength of the anti-abrasion short section, the upper joint and the oil pipe is ensured.
In order to achieve the purpose, the utility model discloses fracturing string's technical scheme is:
the fracturing pipe column comprises an oil pipe and a packer, wherein the packer comprises a central pipe and an upper joint, and the lower end of the upper joint is in threaded connection with the outer side of the upper end of the central pipe; the anti-abrasion short section is connected with an oil pipe through threads by the internal threads, and is connected with an upper joint through threads by the external threads; wherein the diameter of the liquid outlet is smaller than or equal to the inner diameter of the central tube.
The beneficial effects are that: one end of the anti-abrasion short section, which is provided with the liquid inlet, is in threaded connection with the oil pipe, and the other end of the anti-abrasion short section, which is provided with the liquid outlet, is in threaded connection with an upper joint of the packer; when fracturing construction, fracturing fluid in the oil pipe enters the anti-abrasion short section through the liquid inlet, and the diameter of the liquid outlet is smaller than or equal to the inner diameter of the central pipe, so that the fracturing fluid flowing out of the liquid outlet is not easy to impact on the upper end face of the central pipe, erosion and abrasion received by the upper end face of the central pipe are reduced, the connection strength of screw threads is ensured, and serious accidents such as central pipe tripping and tool well falling are avoided.
As a further improvement, the central flow passage comprises a large hole section, a hole expanding section and a small hole section, the hole expanding section is arranged between the large hole section and the small hole section, the liquid inlet is arranged on the large hole section, and the liquid outlet is arranged on the small hole section.
The beneficial effects are that: due to the design, the reaming section has a certain buffering effect on fluid, and the impact force of the fluid on the anti-abrasion short section is reduced.
As a further improvement, the anti-abrasion short section comprises a large-diameter section and a small-diameter section, the large-diameter section is provided with a large hole section, a hole expanding section and a part of small hole section, and the small-diameter section is provided with the rest small hole section.
The beneficial effects are that: design like this, increase the thickness that corresponds reaming section department on the abrasionproof nipple joint, improve the life of abrasionproof nipple joint.
As a further improvement, the reaming section is a conical section.
The beneficial effects are that: the design is convenient for processing.
As a further improvement, the internal thread and the external thread on the anti-abrasion short section are both taper pipe threads.
The beneficial effects are that: by the design, the connection strength of the anti-abrasion short section, the upper joint and the oil pipe is ensured.
Drawings
FIG. 1 is a schematic diagram of a prior art fracturing string with tubing and packer connected;
FIG. 2 is a schematic structural view of the fracturing string in the casing of the present invention;
FIG. 3 is a schematic structural view of the wear prevention sub of FIG. 2 connecting tubing and a packer;
FIG. 4 is a schematic structural diagram of the wear-resistant sub of FIG. 3;
in the figure: 11. an oil pipe; 12. depth correcting short sections; 13. a safety joint; 14. a hydraulic anchor; 15. a wear-resistant short section; 16. a packer; 17. a sliding sleeve sand blower; 18. a restrictor; 19. an upper joint; 20. a central tube; 21. a large diameter section; 22. a small diameter section; 23. a small pore section; 24. a reaming section; 25. a macroporous section; 26. a liquid inlet; 27. and a liquid outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as 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, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, 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, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. Furthermore, the terms "front", "back", "upper", "lower", "left" and "right" are based on the orientation and positional relationship shown in the drawings and are only for convenience of description of the present invention, and do not indicate that the device or component referred to must have a specific orientation, and therefore, should not be construed as limiting the present invention.
The features and properties of the present invention are described in further detail below with reference to examples.
The utility model discloses embodiment 1 of fracturing string:
in this embodiment, as shown in fig. 2, a depth-correcting nipple 12, a safety joint 13, a hydraulic anchor 14, an anti-wear nipple 15, a packer 16, a sliding sleeve sand blower 17, an anti-wear nipple 15, a packer 16 and a restrictor 18 are connected from top to bottom on an oil pipe 11 to form a fracturing string.
In this embodiment, as shown in FIG. 3, the packer 16 includes a base pipe 20 and an upper sub 19. The lower end of the central tube 20 is sleeved on the upper joint 19, and the central tube 20 is in threaded connection with the upper joint 19. Wherein the inner diameter of the central tube 20 is smaller than the inner diameter of the oil tube 11.
In this embodiment, the material steel grade of the anti-wear short section 15 is not lower than that of the oil pipe 11, so as to ensure that the anti-wear short section 15 has sufficient strength. As shown in fig. 3 and 4, the wear prevention sub 15 has a central flow passage along its length direction, the central flow passage includes a large hole section 25, a reaming section 24 and a small hole section 23, the large hole section 25 is located above the small hole section 23, and the reaming section 24 is located between the large hole section 25 and the small hole section 23. The diameter of the liquid inlet 26 of the central channel is larger than that of the liquid outlet 27, the liquid inlet 26 is arranged on the large hole section 25, the liquid outlet 27 is arranged on the small hole section 25, and the diameter of the liquid outlet 27 is smaller than the inner diameter of the central tube 20. In this embodiment, the reaming section 24 is a tapered section.
In this embodiment, as shown in fig. 3 and 4, the maximum outer diameter of the wear-proof short section 15 is the same as the outer diameter of the oil pipe 11, the wear-proof short section 15 includes a large-diameter section 21 and a small-diameter section 22, the large-diameter section 21 has a large-bore section 25, a reaming section 24 and a part of a small-bore section 23, and the small-diameter section 22 has the remaining small-bore section 23, so as to increase the thickness of the corresponding reaming section 24 on the wear-proof short section 15.
In this embodiment, as shown in fig. 3 and 4, an internal thread is provided on the large diameter section 21 corresponding to the large hole section 25, the internal thread is a taper pipe thread, and the wear-resistant short section 15 is in threaded connection with the oil pipe 11 through the taper pipe thread. And the small-diameter section 22 is provided with external threads which are taper pipe threads, and the anti-abrasion short section 15 is in threaded connection with the upper joint 19 of the packer 16 through the taper pipe threads.
In the working process of the fracturing string, as shown in fig. 3 and 4, the sand-carrying fluid in the oil pipe 11 enters the anti-abrasion short section 15 through the liquid inlet 26, the sand-carrying fluid erodes the part, corresponding to the reaming section 24, on the anti-abrasion short section 15 to buffer, because the diameter of the liquid outlet 27 is smaller than the inner diameter of the central pipe 20, the sand-carrying fluid flowing out from the liquid outlet 27 is not easy to impact on the upper end face of the central pipe 20, the erosive wear on the upper end face of the central pipe 20 is reduced, the connection strength of a screw thread is ensured, the serious accidents such as tripping of the central pipe 20, tool falling and the like are avoided, moreover, the part, corresponding to the reaming section 24, on the anti-abrasion short section 15 is thickened, the service life of the anti-abrasion short section 15 is prolonged, and the safety of a downhole tool in the fracturing construction process is ensured.
The utility model discloses embodiment 2 of fracturing string:
this example differs from example 1 in that: in embodiment 1, the center flow channel includes a large hole section 25, a reaming section 24 and a small hole section 23, the reaming section 24 is located between the large hole section 25 and the small hole section 23, the liquid inlet 26 is disposed on the large hole section 25, and the liquid outlet 27 is disposed on the small hole section 23. In this embodiment, the central flow channel is a cone structure as a whole, the liquid inlet is disposed at the maximum diameter end of the central flow channel, and the liquid outlet is disposed at the minimum diameter end of the central flow channel.
The utility model discloses embodiment 3 of fracturing string:
this example differs from example 1 in that: in embodiment 1, the wear prevention sub comprises a large diameter section 21 and a small diameter section 22, the large diameter section 21 is provided with a large hole section 25, a reaming section 24 and a part of a small hole section 23, and the small diameter section 22 is provided with the rest of the small hole section 23. In this embodiment, based on the abrasionproof nipple joint includes major diameter section and path section, the major diameter section has major bore section and reaming section, and the path section has the path section.
The utility model discloses embodiment 4 of fracturing string:
this example differs from example 1 in that: in example 1, the reaming section 24 is a tapered section and the reaming section 24 is a straight surface. In this embodiment, the reaming section is an arc-shaped surface.
The utility model discloses embodiment 5 of fracturing string:
this example differs from example 1 in that: in embodiment 1, the internal thread and the external thread on the wear-resistant short section are both taper pipe threads. In this embodiment, internal thread and external screw thread on the abrasionproof nipple joint are the straight thread.
The utility model discloses the embodiment of abrasionproof nipple joint: the embodiment of the wear-proof short joint is the same as that of any one of embodiments 1 to 5 of the fracturing string, and is not specifically described here.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The anti-abrasion short section (15) is characterized by comprising a central flow channel, the diameter of a liquid inlet (26) of the central flow channel is larger than that of a liquid outlet (27) of the central flow channel, an internal thread is arranged on the anti-abrasion short section (15) corresponding to the liquid inlet (26), an external thread is arranged on the anti-abrasion short section (15) corresponding to the liquid outlet (27), the anti-abrasion short section (15) is in threaded connection with an oil pipe (11) through the internal thread, and the anti-abrasion short section (15) is in threaded connection with an upper joint (19) of a packer (16) through the external thread; wherein the diameter of the liquid outlet (27) is smaller than or equal to the inner diameter of the central tube (20).
2. The wear sub (15) of claim 1, wherein the central flow passage comprises a large bore section (25), a reaming section (24) and a small bore section (23), the reaming section (24) being located between the large bore section (25) and the small bore section (23), the liquid inlet (26) being provided on the large bore section (25) and the liquid outlet (27) being provided on the small bore section (23).
3. The wear sub (15) of claim 2, wherein the wear sub (15) comprises a large diameter section (21) and a small diameter section (22), the large diameter section (21) having a large bore section (25), a reaming section (24) and a portion of the small bore section (23), the small diameter section (22) having the remaining small bore section (23).
4. The wear sub (15) of claim 2 or 3, wherein the reamer section (24) is a tapered bore section.
5. The wear joint (15) of claim 1, 2 or 3, wherein the internal and external threads on the wear joint (15) are taper pipe threads.
6. The fracturing string comprises an oil pipe (11) and a packer (16), wherein the packer (16) comprises a central pipe (20) and an upper joint (19), and the lower end of the upper joint (19) is in threaded connection with the outer side of the upper end of the central pipe (20); the anti-abrasion pipe is characterized by further comprising an anti-abrasion short section (15) with a central flow channel, wherein the diameter of a liquid inlet (26) of the central flow channel is larger than that of a liquid outlet (27) of the central flow channel, an internal thread is arranged on the anti-abrasion short section (15) corresponding to the liquid inlet (26), an external thread is arranged on the anti-abrasion short section (15) corresponding to the liquid outlet (27), the anti-abrasion short section (15) is in threaded connection with the oil pipe (11) through the internal thread, and the anti-abrasion short section (15) is in threaded connection with the upper joint (19) through the external thread; wherein the diameter of the liquid outlet (27) is smaller than or equal to the inner diameter of the central tube (20).
7. The fracturing string of claim 6, wherein the central flow passage comprises a large bore section (25), a reaming section (24) and a small bore section (23), the reaming section (24) being located between the large bore section (25) and the small bore section (23), the liquid inlet (26) being provided on the large bore section (25) and the liquid outlet (27) being provided on the small bore section (23).
8. The fracturing string of claim 7, wherein the wear sub (15) comprises a large diameter section (21) and a small diameter section (22), the large diameter section (21) comprises a large bore section (25), a reaming section (24) and a part of the small bore section (23), and the small diameter section (22) comprises the rest of the small bore section (23).
9. The fracturing string of claim 7 or 8, wherein the reamer section (24) is a cone section.
10. The fracturing string of claim 6, 7 or 8, wherein the internal and external threads on the wear nipple (15) are both taper pipe threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122320088.3U CN216429581U (en) | 2021-09-24 | 2021-09-24 | Anti-abrasion pup joint and fracturing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122320088.3U CN216429581U (en) | 2021-09-24 | 2021-09-24 | Anti-abrasion pup joint and fracturing string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216429581U true CN216429581U (en) | 2022-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122320088.3U Active CN216429581U (en) | 2021-09-24 | 2021-09-24 | Anti-abrasion pup joint and fracturing string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216429581U (en) |
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2021
- 2021-09-24 CN CN202122320088.3U patent/CN216429581U/en active Active
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