CN220434681U - Novel fracturing sand washing tool - Google Patents
Novel fracturing sand washing tool Download PDFInfo
- Publication number
- CN220434681U CN220434681U CN202321809537.3U CN202321809537U CN220434681U CN 220434681 U CN220434681 U CN 220434681U CN 202321809537 U CN202321809537 U CN 202321809537U CN 220434681 U CN220434681 U CN 220434681U
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- Prior art keywords
- sand washing
- washing pipe
- guiding
- window
- lower plug
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- 239000004576 sand Substances 0.000 title claims abstract description 111
- 238000005406 washing Methods 0.000 title claims abstract description 108
- 238000010008 shearing Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008676 import Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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- Cleaning In General (AREA)
Abstract
The utility model discloses a novel fracturing sand washing tool, which comprises a barrel and a sand washing pipe arranged in the barrel, wherein the upper end and the lower end of the barrel are respectively provided with an upper joint and a lower plug which are fixedly connected with the upper joint and the lower plug, and the upper end of the sand washing pipe is provided with a switching barrel which is fixedly connected with the upper joint and the lower plug; the inner diameter of the switching cylinder is matched with the outer diameter of the sand washing pipe, the outer diameter of the switching cylinder is matched with the inner diameter of the cylinder body, the top of the sand washing pipe is a conical opening, the side wall of the switching cylinder is provided with a guiding-out window, the guiding-out window is higher than the sand washing pipe, the sand washing pipe is provided with a guiding-in window, and the inner side wall of the cylinder body is provided with a ring groove; in the initial state, the switching cylinder is fixedly connected with the cylinder body through the shearing pin, and the guiding-out window is positioned above the annular groove. Fewer parts are adopted to form a central runner and a bypass runner before and after ball throwing, the requirements of fracturing and sand washing are met, parts are reduced, reliability is increased, and meanwhile, the difficulty of processing and assembling and the production cost are reduced.
Description
Technical Field
The utility model belongs to the field of special tools for oil and gas exploitation, and particularly relates to a novel fracturing sand washing tool.
Background
After long-time exploitation, oil and gas wells are prone to oil layer blockage, so that yield is reduced, and particularly for some low permeability oil fields, the phenomenon is obvious, and therefore the reservoir needs to be artificially modified, namely the reservoir crack condition is improved, so that normal exploitation requirements are met.
At present, a fracturing mode is mainly adopted to reform a reservoir, a high-pressure pump truck is utilized to press fluid into a well at a high speed, planned expansion is carried out on a reservoir fracture by means of well bottom pressure holding, propping agents (such as sand grains or glass particles) are mixed into the pumped fluid under normal conditions, the propping agents are mainly used for keeping stability of the expanded fracture in the later stage, but at the same time, a lot of propping agents are deposited at the well bottom in the fracturing process, so that well flushing operation is usually carried out after the fracturing is finished, the deposited propping agents are prevented from influencing production, and a step operation mode is adopted, so that the operation cost is greatly increased when a pipe column is started, the operation is complicated, and the operation risk is increased.
In view of this situation, the prior art tends to combine fracturing and flushing operations, that is, to achieve the goal of simultaneously meeting two operation demands through one tool, related tools are also presented in the market, and the applicant has also proposed a patent application with the application number of 202122364293.X, named as "integrated fracturing sand flushing head", in early stage, which is mainly used for solving the problem of poor reliability of sand flushing pipes in the traditional tools, but in the later implementation process of the applicant, it is found that, because the ball seat, the force transmission sleeve and the connecting sleeve need to be installed in the outer cylinder, the processing and assembling costs of the tools are relatively increased, the processing precision of each component is also required to be higher, the components are too many, corresponding possible problems are also more, and the reliability of the tools is also affected.
Disclosure of Invention
In view of the above, the utility model provides a novel fracturing sand washing tool, which meets the dual operation requirements of fracturing well washing and solves the problems of complex structure, high difficulty in production, processing and assembly, high cost and the like of the existing tool.
The technical scheme is as follows:
the utility model provides a novel fracturing sand washing instrument, includes the barrel and sets up the sand washing pipe in this barrel, its key lies in: the upper end and the lower end of the cylinder body are respectively provided with an upper joint and a lower plug which are fixedly connected with the upper joint and the lower plug, and the upper end of the sand washing pipe is provided with a switching cylinder which is fixedly connected with the sand washing pipe;
the inner diameter of the switching cylinder is matched with the outer diameter of the sand washing pipe, the outer diameter of the switching cylinder is matched with the inner diameter of the cylinder body, the top of the sand washing pipe is a conical opening, the side wall of the switching cylinder is provided with a guiding-out window, the guiding-out window is higher than the sand washing pipe, the sand washing pipe is provided with a guiding-in window, and the inner side wall of the cylinder body is provided with a ring groove;
in the initial state, the switching cylinder is fixedly connected with the cylinder body through the shearing pin, the guiding-out window is positioned above the annular groove, after the shearing pin is damaged, the switching cylinder and the sand washing pipe synchronously descend, the guiding-in window and the guiding-out window can be simultaneously positioned in the height range of the annular groove, and the sand washing pipe is at least partially exposed out of the lower plug.
By adopting the scheme, in the fracturing process, the sand washing can be completed through the middle runner, when sand washing needs to be carried out, after the steel ball is put into, after the shearing pin is damaged by utilizing fluid pressure, the sand washing pipe synchronously descends together with the switching cylinder, the sand washing pipe is exposed out of the lower plug, and the bypass runner is established by utilizing the export window, the annular groove and the import window, so that the sand washing is normally carried out.
As preferable: the sand washing pipe is provided with a limiting part protruding outwards along the radial direction of the sand washing pipe, the limiting part is positioned below the guide-in window, and when the sand washing pipe slides downwards to the lowest position, the limiting part is propped against the lower end of the annular groove or/and the inner end of the lower plug. By adopting the scheme, the axial stability of the sand washing pipe in the sand washing process can be ensured, and the sand washing pipe is prevented from falling off.
As preferable: in the initial state, the sand washing pipe is at least partially positioned in the lower plug, guide keys which are axially arranged in parallel are arranged on the inner side wall of the lower plug, and guide grooves matched with the guide keys are formed in the sand washing pipe. By adopting the scheme, the circumferential stability of the sand washing pipe in the sand washing process can be better ensured, the rotation is prevented, and the sand washing operation towards the fixed direction can be ensured.
As preferable: sealing rings A are respectively sleeved on the upper side and the lower side of the guide-out window on the outer side wall of the switching cylinder. By adopting the scheme, the central runner fluid is prevented from penetrating into the gap between the switching cylinder and the cylinder body through the leading-out window in the fracturing process, and the fracturing pressure is prevented from being influenced.
As preferable: when the sand washing pipe slides downwards to the lowest position, the sealing ring A positioned above the guiding-out window is positioned above the annular groove. By adopting the scheme, the upper part of the bypass flow channel is mainly sealed to a certain extent, and the fluid in the annular groove is prevented from being dispersed upwards.
As preferable: the limiting part is annular, and a sealing ring B is embedded at the bottom or/and the outer side of the circumference of the limiting part. By adopting the sealing scheme, the fluid in the annular groove can be prevented from entering the gap between the sand washing pipe and the lower plug, and the sand washing pressure is prevented from being influenced.
As preferable: the inner end of the lower plug is flush with the lower end of the ring groove. By adopting the scheme, the sealing effect and the supporting stability can be further improved.
As preferable: the outer end of the lower plug is horn-shaped.
As preferable: the flow area of the export window is larger than or equal to the flow area of the import window. By adopting the scheme, the sand washing pressure can be better ensured, and the sand washing effect is improved.
Compared with the prior art, the utility model has the beneficial effects that:
the novel fracturing sand washing tool provided by the utility model adopts fewer parts to form the central runner and the bypass runner before and after ball throwing, meets the fracturing and sand washing requirements, reduces parts, increases reliability, and reduces the difficulty of processing and assembling and the production cost.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an exploded view of the present utility model;
FIG. 3 is a top view of the present utility model;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is a cross-sectional view taken along B-B in FIG. 3;
FIG. 6 is a schematic view of an embodiment of a sand wash pipe stop;
FIG. 7 is a schematic view of a sand washing pipe structure;
FIG. 8 is a schematic diagram of a switching cylinder;
fig. 9 is a schematic view of the sand washing pipe in the lowest position, i.e. the sand washing state.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
The novel fracturing sand washing tool mainly comprises a barrel body 1 and a sand washing pipe 2 which are of hollow revolution structures, wherein an upper joint 10 and a lower plug 11 are respectively fixedly connected with the upper end and the lower end of the barrel body 1, specifically, the upper end and the lower end of the barrel body 1 are both provided with internal threads, the upper joint 10 and the lower plug 11 are connected with the barrel body 1 through threaded fit, the outer end of the upper joint 10 is provided with internal threads and mainly used for being connected with an upper drilling tool, and the outer end of the lower plug 11 is in a horn shape, so that fluid flows out and the sand washing pipe stretches out.
The sand washing pipe 2 is positioned in the cylinder body 1, the upper end (taking the use state as a reference) of the sand washing pipe 2 is provided with a switching cylinder 3 fixedly connected with the sand washing pipe, as shown in the figure, the inner diameter of the switching cylinder 3 is matched with the outer diameter of the sand washing pipe 2, the outer diameter of the switching cylinder 3 is matched with the inner diameter of the cylinder body 1, the upper end of the sand washing pipe 2 is in threaded fit with the lower end of the switching cylinder 3, the top of the sand washing pipe 2 is a conical opening, the side wall of the switching cylinder 3 is provided with a guiding-out window 30, the guiding-out window 30 is higher than the sand washing pipe 2, the sand washing pipe 2 is provided with a guiding-in window 20, the inner side wall of the cylinder body 1 is provided with annular grooves 12, when the sand washing pipe is used, the guiding-out window 3 is uniformly distributed along the circumferential direction of the switching cylinder 3, the guiding-in window 20 is uniformly distributed along the circumferential direction of the sand washing pipe 2, and the length of the annular grooves 12 is larger than the sum of the lengths of the guiding-out window 30 and the guiding-in window 20.
In the initial state, the switching cylinder 3 is fixedly connected with the cylinder body 1 through the shearing pin 13, the export window 30 is positioned above the annular groove 12, the lower end of the sand washing pipe 2 is positioned in the cylinder body 1 or the lower plug 11, after the shearing pin 13 is damaged, the switching cylinder 3 and the sand washing pipe 2 synchronously descend, the import window 20 and the export window 30 can be simultaneously positioned in the height range of the annular groove 12, and the sand washing pipe 2 is at least partially exposed outside the lower plug 11.
The sand washing pipe 2 is provided with a limiting part 21 protruding outwards along the radial direction, the limiting part 21 is positioned below the leading-in window 20, and when the sand washing pipe 2 slides downwards to the lowest position (as shown in fig. 9), the limiting part 21 is propped against the lower end of the annular groove 12 or/and the inner end of the lower plug 11, so that the lower limit of the sand washing pipe 2 is realized, and the sand washing pipe is prevented from falling off.
In the initial state, the sand washing pipe 2 is at least partially positioned in the lower plug 11, the inner side wall of the lower plug 11 is provided with guide keys 14 which are axially arranged in parallel, the sand washing pipe 2 is provided with guide grooves 22 matched with the guide keys 14, and the guide grooves 22 extend to the lower end of the sand washing pipe 2 and are positioned at the lower side of the sand washing pipe, so that circumferential limitation of the sand washing pipe 2 is realized, rotation is prevented, and consistency of sand washing directions is ensured.
Sealing rings A31 are respectively sleeved on the upper side and the lower side of the guiding-out window 30 on the outer side wall of the switching cylinder 3, and when the sand washing pipe 2 slides downwards to the lowest position, the sealing rings A31 above the guiding-out window 30 are positioned above the annular grooves 12.
In addition, the limiting portion 21 is annular, and a sealing ring B23 is embedded at the bottom or/and the outer side of the circumference of the limiting portion 21, referring to fig. 6 and 9, in this embodiment, the outer diameter of the limiting portion 21 is adapted to the inner diameter of the ring groove 12, and the sealing ring B23 is directly sleeved on the limiting portion 21.
Of course, in order to avoid the strength weakening caused by too small thickness of the lower end wall of the barrel 1, the lower end of the ring groove 12 generally does not extend to the end portion so as to ensure that the lower end of the barrel 1 has better strength, in this case, the inner end of the lower plug 11 is generally flush with the lower end of the ring groove 12, and at this time, the sealing ring B23 is directly embedded in the lower surface of the limiting portion 21.
In the present application, in order to sufficiently secure the sand washing pressure, the flow area of the outlet window 30 is larger than or equal to the flow area of the inlet window 20.
The novel fracturing sand washing tool shown with reference to fig. 1 to 9 has the following working principle: in the fracturing operation, as shown in fig. 1, the steel ball 4 is not put into the fracturing operation, the central channel is smooth, and the shearing pins 13 are kept in a connected state.
After the fracturing operation is finished, the steel ball 4 is put into, the steel ball 4 is matched with a conical opening at the upper end of the sand washing pipe 2, and finally falls into the conical opening at the upper end of the sand washing pipe 2, so that a central channel is plugged, a shearing pin 13 is sheared under the action of pressure, the switching cylinder 3 and the sand washing pipe 2 synchronously descend, the sand washing pipe 2 is pushed to the lowest position, a limiting part 21 abuts against the inner end surface of the lower plug 11, at the moment, the leading-out window 30 and the leading-in window 20 are both positioned in the range of the annular groove 12, a bypass flow channel bypassing the steel ball 4 is formed, fluid above enters the annular groove 12 through the leading-out window 30, and fluid in the annular groove 12 enters the lower part of the sand washing pipe 2 through the leading-in window 20, so that a sand washing flow channel is formed, and the sand washing operation can be performed as shown in fig. 9.
Finally, it should be noted that the above description is only a preferred embodiment of the present utility model, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (9)
1. The utility model provides a novel fracturing sand washing instrument, includes barrel (1) and sets up sand washing pipe (2) in this barrel (1), its characterized in that: the upper end and the lower end of the cylinder body (1) are respectively provided with an upper joint (10) and a lower plug (11) which are fixedly connected with the upper joint, and the upper end of the sand washing pipe (2) is provided with a switching cylinder (3) which is fixedly connected with the upper joint;
the inner diameter of the switching cylinder (3) is matched with the outer diameter of the sand washing pipe (2), the outer diameter of the switching cylinder (3) is matched with the inner diameter of the cylinder body (1), the top of the sand washing pipe (2) is a conical opening, a guiding-out window (30) is formed in the side wall of the switching cylinder (3), the guiding-out window (30) is higher than the sand washing pipe (2), a guiding-in window (20) is formed in the sand washing pipe (2), and an annular groove (12) is formed in the inner side wall of the cylinder body (1);
in an initial state, the switching cylinder (3) is fixedly connected with the cylinder body (1) through the shearing pin (13), the guiding-out window (30) is located above the annular groove (12), after the shearing pin (13) is damaged, the switching cylinder (3) and the sand washing pipe (2) synchronously descend, the guiding-in window (20) and the guiding-out window (30) can be located in the height range of the annular groove (12) at the same time, and the sand washing pipe (2) is at least partially exposed to the outside of the lower plug (11).
2. The novel fracturing sand washing tool of claim 1, wherein: the sand washing pipe (2) is provided with a limiting part (21) protruding outwards along the radial direction of the sand washing pipe, the limiting part (21) is positioned below the guide-in window (20), and when the sand washing pipe (2) slides downwards to the lowest position, the limiting part (21) is propped against the lower end of the annular groove (12) or/and the inner end of the lower plug (11).
3. The novel fracturing sand washing tool of claim 2, wherein: in the initial state, the sand washing pipe (2) is at least partially positioned in the lower plug (11), guide keys (14) which are axially arranged in parallel are arranged on the inner side wall of the lower plug (11), and guide grooves (22) matched with the guide keys (14) are formed in the sand washing pipe (2).
4. A novel fracturing sand washing tool according to claim 2 or 3, characterized in that: sealing rings A (31) are sleeved on the upper side and the lower side of the guide-out window (30) on the outer side wall of the switching cylinder (3).
5. The novel fracturing sand washing tool of claim 4, wherein: when the sand washing pipe (2) slides downwards to the lowest position, the sealing ring A (31) above the guiding-out window (30) is positioned above the annular groove (12).
6. A novel fracturing sand washing tool according to claim 2 or 3, characterized in that: the limiting part (21) is annular, and a sealing ring B (23) is embedded at the bottom or/and the outer side of the circumference of the limiting part.
7. The novel fracturing sand washing tool of claim 6, wherein: the inner end of the lower plug (11) is flush with the lower end of the annular groove (12).
8. The novel fracturing sand washing tool of claim 1, wherein: the outer end of the lower plug (11) is horn-shaped.
9. The novel fracturing sand washing tool of claim 1 or 8, wherein: the flow area of the outlet window (30) is greater than or equal to the flow area of the inlet window (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321809537.3U CN220434681U (en) | 2023-07-07 | 2023-07-07 | Novel fracturing sand washing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321809537.3U CN220434681U (en) | 2023-07-07 | 2023-07-07 | Novel fracturing sand washing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220434681U true CN220434681U (en) | 2024-02-02 |
Family
ID=89701897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321809537.3U Active CN220434681U (en) | 2023-07-07 | 2023-07-07 | Novel fracturing sand washing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220434681U (en) |
-
2023
- 2023-07-07 CN CN202321809537.3U patent/CN220434681U/en active Active
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