CN210918933U - Reverse circulation positive sand washing pipe column - Google Patents
Reverse circulation positive sand washing pipe column Download PDFInfo
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- CN210918933U CN210918933U CN201921255505.7U CN201921255505U CN210918933U CN 210918933 U CN210918933 U CN 210918933U CN 201921255505 U CN201921255505 U CN 201921255505U CN 210918933 U CN210918933 U CN 210918933U
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Abstract
The utility model relates to an oil borehole operation device, concretely relates to positive sand washing tubular column of reverse circulation. The reverse circulation positive sand flushing pipe column comprises a leather cup type packer and a liquid flow conversion component which are arranged up and down and are connected by threads; the liquid flow conversion component is internally provided with a liquid inlet flow channel and a liquid return flow channel which are relatively independent, the liquid inlet flow channel penetrates through the liquid flow conversion component along the up-down direction, the upper end of the liquid return flow channel penetrates out of the upper end part of the liquid flow conversion component, and the lower end of the liquid return flow channel penetrates out of the side part of the lower end of the liquid flow conversion component and is communicated with the oil sleeve annulus; the outer pipe is connected to the upper end of the leather cup type packer, the side wall of the outer pipe is provided with an outer pipe liquid inlet, the outer pipe liquid inlet is communicated with the liquid inlet flow channel, and the upper end of the outer pipe is used for connecting an oil pipe; the inner pipe is arranged in the outer pipe, the lower end of the inner pipe is connected with the upper end of the liquid return flow passage in a sealing way, the upper end of the inner pipe upwards penetrates through the leather cup type packer and extends to the position above the liquid inlet of the outer pipe, and the upper end of the inner pipe is communicated with the oil pipe; and the plugging piece is used for plugging an annular space between the inner pipe and the outer pipe and is positioned above the liquid inlet of the outer pipe.
Description
Technical Field
The utility model relates to an oil borehole operation device, concretely relates to positive sand washing tubular column of reverse circulation.
Background
The sand is produced from the stratum during the production of the oil-water well due to reasons such as stratum cementation looseness and the like, the sand setting at the bottom of the well is easily caused during the fracturing construction, the stratum can be buried by the sand when the sand setting is too much, the normal production of the oil-water well is influenced, and the sand deposited at the bottom of the well needs to be washed out.
The prior sand washing modes mainly comprise positive circulation positive sand washing, reverse circulation reverse sand washing and positive and negative sand washing. The positive circulation positive sand flushing refers to that the workover fluid flows downwards from the sand flushing pipe, the workover fluid impacts settled sand at a high flow rate when flowing out of the pipe orifice of the sand flushing pipe, the flushed sand and the workover fluid are mixed and then return to the ground along an oil sleeve annulus formed by the sand flushing pipe and a sleeve, and the positive circulation positive sand flushing has the advantages of large impact force and easiness in flushing and dispersing the settled sand, but the speed is low and the time is long when the workover fluid returns from the oil sleeve annulus. The reverse circulation back flushing sand refers to that the workover fluid flows downwards from the oil sleeve annulus of the sand flushing pipe and the sleeve to impact settled sand, the flushed sand is mixed with the workover fluid and then returns to the ground along the sand flushing pipe, and the reverse circulation back flushing sand has higher return speed and stronger sand carrying capacity but smaller impact force on the settled sand. The positive and negative sand washing adopts a positive washing mode to wash away settled sand, enables the sand to be in a suspension state, and then carries the sand to the ground by back washing instead, but the sand column in the shaft needs to be washed repeatedly in positive and negative directions when being high, so that the operation is troublesome, and the efficiency is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a positive sand washing tubular column of reverse circulation to solve the lower technical problem of prior art's sand washing mode efficiency.
In order to realize the purpose, the utility model discloses reverse circulation positive sand washing tubular column's technical scheme is: a reverse circulation positive sand washing pipe column comprises a leather cup type packer and a liquid flow conversion component which are arranged up and down and are connected through threads;
the liquid flow conversion component is used for realizing liquid reversing flow, a liquid inlet flow channel and a liquid return flow channel which are relatively independent are arranged in the liquid flow conversion component, the liquid inlet flow channel penetrates through the liquid flow conversion component along the up-down direction, the liquid inlet flow channel is used for guiding liquid flowing through the cup packer to the well bottom, the upper end of the liquid return flow channel penetrates out of the upper end part of the liquid flow conversion component, and the lower end of the liquid return flow channel penetrates out of the side part of the lower end of the liquid flow conversion component and is;
the leather cup type packer is used for packing and isolating an oil sleeve annulus and comprises a leather cup with an upward opening;
the outer pipe is connected to the upper end of the leather cup type packer, a liquid inlet of the outer pipe is formed in the side wall of the outer pipe, the liquid inlet of the outer pipe is communicated with the liquid inlet flow channel, and the upper end of the outer pipe is used for being connected with an oil pipe;
the inner pipe is arranged in the outer pipe, the lower end of the inner pipe is connected with the upper end of the liquid return flow passage in a sealing way, the upper end of the inner pipe upwards penetrates through the leather cup type packer and extends to the position above the liquid inlet of the outer pipe, and the upper end of the inner pipe is communicated with the oil pipe;
the plugging piece is arranged between the upper end of the inner pipe and the outer pipe and used for plugging an annular space between the inner pipe and the outer pipe, and the plugging piece is positioned above the liquid inlet of the outer pipe.
The utility model has the advantages that: when the device is used, liquid is injected into the oil sleeve ring air, the liquid enters the outer pipe from the oil sleeve ring air through the liquid inlet of the outer pipe due to the plugging effect of the leather cup type packer, only flows downwards under the plugging effect of the plugging piece, enters the liquid inlet flow channel of the liquid flow conversion part after passing through the leather cup type packer, then flows to the bottom of the well, and disperses settled sand at the bottom of the well and flows to the oil sleeve ring air, and the liquid carrying sand enters the liquid return flow channel of the liquid flow conversion part due to the plugging effect of the leather cup type packer, flows upwards to the oil pipe through the inner pipe and returns to the ground. The utility model discloses a positive sand washing of reverse circulation, the liquid returning that has had reverse circulation concurrently is fast with the big advantage of impact force of positive sand washing, has improved sand washing speed. The cup leather type packer has a self-plugging function, the opening of the cup leather is upward, the annular space of an oil sleeve can be guaranteed to be plugged under the direct impact of liquid, and the cup leather type packer can be guaranteed to keep a plugging state when a tubular column is lifted up and down.
Further, the liquid flow conversion part comprises a cylinder connected to the lower end of the leather cup type packer, the liquid inlet flow channel comprises an eccentric liquid inlet hole eccentrically arranged on the cylinder, the eccentric liquid inlet hole extends up and down, the liquid return flow channel comprises a central blind hole located at the end part of the upper end of the cylinder, and the liquid flow conversion part further comprises a radial perforation communicated with the central blind hole and the outer part of the cylinder, and the radial perforation is arranged at intervals along the circumferential direction of the eccentric liquid inlet hole.
The liquid inlet flow channel and the liquid return flow channel are formed by arranging the eccentric liquid inlet hole, the central blind hole and the radial through hole, and the liquid inlet flow channel and the liquid return flow channel are simple in structure and easy to machine and form.
Further, the radial through hole is a long hole extending in the up-down direction.
The radial through holes are long holes, so that the flow area of the radial through holes can be increased, and the pressure loss when liquid flows through the radial through holes can be reduced as much as possible.
Furthermore, the hole opening of the central blind hole is in threaded connection with a sealing pipe, and the lower end of the inner pipe is inserted into the upper end of the sealing pipe in a sealing manner.
The sealing tube is connected to the central blind hole, and the sealing tube and the inner tube are inserted in a sealing mode to achieve integral connection, so that connection is more reliable and use is more convenient.
Furthermore, a sealing ring is arranged outside the lower end of the inner pipe, and the inner pipe is matched with the sealing pipe in a sealing mode through the matching of the sealing ring and the inner wall of the sealing pipe.
Furthermore, the plugging piece is a double pipe joint, the lower end of the double pipe joint is provided with two screw threads which are arranged at intervals along the radial direction, the screw thread positioned on the inner side is connected with the inner pipe thread, the screw thread positioned on the outer side is connected with the outer pipe thread, so that the inner pipe and the outer pipe are arranged at intervals along the radial direction, and the upper end of the double pipe joint is also provided with an oil pipe screw thread for connecting an oil pipe.
Through setting up double-barrelled joint, both realized the shutoff of annular space between inside and outside pipe, also played the effect of connecting oil pipe, inner tube, outer tube three, the integrated level is higher.
Further, the outer pipe comprises a sieve pipe provided with sieve holes, and the sieve holes form the liquid inlet of the outer pipe.
The sieve mesh in the sieve tube can prevent the oil lantern ring from entering the pipe column by the large particles in the air, and the flow channel is blocked.
Furthermore, the lower end of the liquid flow conversion part is connected with a pen point, and an internal flow channel of the pen point is communicated with the liquid inlet flow channel.
Through setting up the nib, can puncture the surface of sand bed when transferring the tubular column, do benefit to the sand washing operation.
Drawings
FIG. 1 is a diagram showing a usage state of a reverse circulation positive sand blast pipe column of the present invention in example 1;
FIG. 2 is a schematic view of the double pipe fitting of FIG. 1;
FIG. 3 is a schematic view of a cartridge in the fluid flow shifting part of FIG. 1;
FIG. 4 is a schematic view of section A-A of FIG. 3;
FIG. 5 is a schematic view of the fluid diverting component of FIG. 1;
FIG. 6 is a schematic view of a fluid switching member in embodiment 2 of a reverse circulation positive sand washing pipe column according to the present invention;
description of reference numerals: 1-a sleeve; 2-oil pipe; 3-a sieve tube; 4-inner tube; 5-sand setting; 6-double pipe joints; 61-large diameter pipe; 62-small diameter pipe; 63-threading the upper end; 64-threading the large-diameter pipe; 65-threading the small-diameter pipe; 7-cup packers; 8-a liquid flow shifting member; 81-column; 82-central blind hole; 83-eccentric liquid inlet hole; 84-radial perforation; 85-central liquid inlet hole; 86-cylindrical screw threads; 87-a sealed tube; 9-a pen point; 10-bottom of the well; 15-outer cylinder; 16-a central standpipe; 17-a central cross tube; 18-a reversing joint; 19-supporting rib plates; 20-a liquid inlet flow channel; 21-liquid return flow channel.
Detailed Description
The following describes embodiments of the present invention with reference to the accompanying drawings.
The utility model discloses a concrete embodiment of positive sand washing tubular column of reverse circulation, as shown in fig. 1 to fig. 5, positive sand washing tubular column of reverse circulation can make during flush fluid (being liquid) gets into the tubular column by the oil jacket annular space to by the feed liquor runner in the tubular column downward impact sand setting, and make during the flush fluid of carrying sand gets into the tubular column by the oil jacket annular space, upwards return to ground by the liquid flow way that returns in the tubular column again, specifically as follows.
As shown in figure 1, the reverse circulation positive sand washing pipe column comprises an oil pipe 2, a double-pipe joint 6, an outer pipe, a leather cup type packer 7, a liquid flow conversion part 8 and a pen point 9 which are sequentially connected from top to bottom, wherein the outer pipe 3 comprises a sieve pipe 3, the upper end and the lower end of the sieve pipe 3 are connected with the double-pipe joint 6 and the leather cup type packer 7 through connecting pipes, other parts are connected through threads, each part is internally provided with an internal flow passage, and the internal flow passages of the parts are communicated up and down. An inner pipe 4 is further screwed to the lower end of the double pipe joint 6, and the lower end of the inner pipe 4 is sealingly inserted into the liquid flow conversion member 8.
Wherein, oil pipe 2 is the oil pipe commonly used in the oil field, and no longer repeated. The double pipe joint 6 is constructed as shown in fig. 2, and the double pipe joint 6 includes an upper large-diameter pipe 61 and a lower small-diameter pipe 62, and the large-diameter pipe 61 and the small-diameter pipe 62 are integrally formed and communicate with each other. The upper end of the large-diameter pipe 61 is provided with an upper end screw thread 63 which is connected with the oil pipe 2 through screw threads, the lower end of the large-diameter pipe 61 is provided with a large-diameter pipe screw thread 64, and the lower end of the small-diameter pipe is provided with a small-diameter pipe screw thread 65. In assembly, the outer tube is fitted over the large diameter tube screw 64 and the inner tube 4 is fitted over the small diameter tube screw 65 so that the outer tube and the inner tube 4 are spaced radially to form an annulus, and the upper end of the annulus is sealed off by the double pipe joint 6.
Sieve pipe 3 is prior art, and sieve pipe 3 includes the tubular base member, has seted up a plurality of sieve meshes on the tubular base member, can supply liquid to pass through, and can prevent that the great impurity of granule from passing through in the liquid.
The cup packer 7 is also the prior art, and it specifically includes the tubulose base member, and the fixed cover of being equipped with the cup on the tubulose base member, during the installation, the cup opening up, when the tubular column went into sleeve pipe 1 down, the cup rubbed with sleeve pipe 1 inner wall, and during the sand washing, the cup upside was directly impacted by liquid, and the atress is greater than the downside, and the cup rises outward, and sealed oil jacket annular space.
The liquid flow conversion part 8 is a core part of the tubular column, as shown in fig. 3 to 5, the liquid flow conversion part 8 comprises a cylinder 81, the upper end and the lower end of the cylinder 81 are both provided with threads, the upper end of the cylinder is internally threaded and is connected with the cup packer 7, and the lower end of the cylinder is externally threaded and is connected with the pen point 9. A central liquid inlet hole 85 is formed in the lower end of the column 81, a plurality of eccentric liquid inlet holes 83 are eccentrically formed in the upper end of the column, and the eccentric liquid inlet holes 83 are communicated with the central liquid inlet hole 85. As shown in fig. 5, a sealing pipe 87 is screwed on the cylinder screw 86, and the eccentric liquid inlet hole 83 and the central liquid inlet hole 85 form a liquid inlet flow passage. The inner cavity of the sealing tube 87, the central blind hole 82 and the radial through hole 84 form a liquid return flow passage. The liquid inlet flow channel and the liquid return flow channel are relatively independent.
In this embodiment, as shown in fig. 1, a sealing ring is fixed outside the lower end of the inner tube 4, and after the lower end of the inner tube 4 is inserted into the upper end of the sealing tube 87, the sealing ring is in sealing fit with the inner wall of the sealing tube 87 to realize sealing connection, so that the sand-carrying liquid flows upwards through the sealing tube 87 and the inner tube 4.
The structure of nib 9 is prior art, can puncture the surface of sand bed when putting the tubular column down, makes things convenient for liquid to wash, and nib 9 is inside cavity and forms the inside runner, and the inside runner communicates with the feed liquor runner in the liquid stream conversion part 8.
When in use, as shown in figure 1, after the parts are connected, the parts are put into the casing 1 from top to bottom, and when the pipe column is lowered, the surface of a sand layer can be punctured by the pen point 9. During lowering, the cup packer 7 rubs against the inner wall of the casing 1. Then, liquid is injected into the oil sleeve annulus, the liquid impacts a rubber cup of the rubber cup type packer 7 to enable the rubber cup to expand outwards and seal the oil sleeve annulus, due to the plugging of the rubber cup type packer 7, the liquid enters the sieve tube 3, due to the plugging effect of the double-pipe joint 6, the liquid passes through the sieve tube 3, the rubber cup type packer 7, a liquid inlet flow channel of the liquid flow conversion component 8 and the sand setting 5 of the pen point 9 impacting the well bottom 10 downwards, the liquid and the sand are mixed and then flow into the oil sleeve annulus, due to the plugging of the rubber cup type packer 7, the liquid passes through a liquid return flow channel of the liquid flow conversion component 8 and enters the inner tube 4, and then returns to the ground through the double-pipe joint 6 and the oil tube 2, and the reverse circulation positive. The reverse circulation in the embodiment means that liquid flows in from the oil sleeve ring in the air and flows out from the oil pipe; the positive flushing refers to that the pen point 9 flushes the settled sand 5 downwards, the liquid flow speed of the pen point 9 is high when the positive flushing is performed in a reverse circulation mode, the sand return speed is high, and the sand flushing efficiency is improved. In the sand washing process, the pipe column needs to be lifted and lowered, and in the process, the leather cup can always ensure the sealing between the pipe column and the casing pipe.
In this embodiment, the connecting pipes on the two sides of the sieve tube 3 and the sieve tube 3 together form an outer tube, the sieve holes on the sieve tube 3 form an outer tube liquid inlet of the outer tube, the outer tube liquid inlet is communicated with a liquid inlet flow channel of the liquid flow conversion component, and the connecting pipes are actually common oil pipe short joints. In other embodiments, the outer pipe may comprise only a screen.
In this embodiment, the outer tube links to each other through double tube joint 6 with oil pipe 2, and double tube joint 6 both had played the effect of connecting, had also played the effect of annular space between shutoff oil pipe 2 and the outer tube, and double tube joint 6 is the shutoff piece. In other embodiments, the outer pipe and the oil pipe may be integrally formed, the inner pipe is inserted into the outer pipe, and at this time, the plugging member may be an annular plate disposed between the outer pipe and the inner pipe, an inner peripheral surface of the annular plate is sealed with the inner pipe, and an outer peripheral surface of the annular plate is sealed with the outer pipe, so as to achieve the purpose of plugging an annular space between the inner pipe and the outer pipe.
In this embodiment, the inner tube 4 is mounted on the column body through the sealing tube 87, and in other embodiments, the inner tube 4 may be directly screwed into the hole of the central blind hole of the column body.
In this embodiment, the radial through holes 84 are long holes extending up and down, and the long holes can increase the flow area, and in other embodiments, the shapes of the radial through holes can be changed according to actual situations.
The utility model discloses embodiment 2 of positive sand washing tubular column of reverse circulation, as shown in fig. 6, the difference with two above-mentioned embodiments lies in, in this embodiment, the liquid flow conversion part includes urceolus 15, and urceolus 15 link up from top to bottom, is provided with the central standpipe 16 of extending from top to bottom in urceolus 15, wears to adorn on the lower extreme lateral wall of urceolus 15 to be fixed with the center and violently manages 17, links to each other through reversing joint 18 between the inner of the center violently pipe 17 and the lower extreme of central standpipe 16, specifically can adopt the welded mode. In order to ensure that the central vertical pipe 16 can be firmly installed in the outer cylinder 15, a plurality of supporting rib plates 19 are arranged between the central vertical pipe 16 and the outer cylinder 15, and the supporting rib plates 19 are arranged at intervals along the circumferential direction and do not influence the liquid passing.
The central horizontal tube 17, the reversing joint 18 and the inner cavity of the central vertical tube 16 together form a liquid return flow channel 21, a liquid inlet flow channel 20 is formed between the central vertical tube 16 and the outer tube 15, and when the liquid return device is used, liquid enters from the liquid inlet flow channel 20 and returns from the liquid return flow channel 21.
In this embodiment, the structure of the portion connected to the pen tip and the cup packer is not shown in fig. 6.
In this embodiment, the reverse circulation positive sand flushing string includes an upper oil pipe, and in other embodiments, the oil pipe may not be included.
Claims (8)
1. The utility model provides a reverse circulation positive sand washing tubular column which characterized in that: comprises a leather cup type packer and a liquid flow conversion component which are arranged up and down and are connected by screw threads;
the liquid flow conversion component is used for realizing liquid reversing flow, a liquid inlet flow channel and a liquid return flow channel which are relatively independent are arranged in the liquid flow conversion component, the liquid inlet flow channel penetrates through the liquid flow conversion component along the up-down direction, the liquid inlet flow channel is used for guiding liquid flowing through the cup packer to the well bottom, the upper end of the liquid return flow channel penetrates out of the upper end part of the liquid flow conversion component, and the lower end of the liquid return flow channel penetrates out of the side part of the lower end of the liquid flow conversion component and is;
the leather cup type packer is used for packing and isolating an oil sleeve annulus and comprises a leather cup with an upward opening;
the outer pipe is connected to the upper end of the leather cup type packer, a liquid inlet of the outer pipe is formed in the side wall of the outer pipe, the liquid inlet of the outer pipe is communicated with the liquid inlet flow channel, and the upper end of the outer pipe is used for being connected with an oil pipe;
the inner pipe is arranged in the outer pipe, the lower end of the inner pipe is connected with the upper end of the liquid return flow passage in a sealing way, the upper end of the inner pipe upwards penetrates through the leather cup type packer and extends to the position above the liquid inlet of the outer pipe, and the upper end of the inner pipe is communicated with the oil pipe;
the plugging piece is arranged between the upper end of the inner pipe and the outer pipe and used for plugging an annular space between the inner pipe and the outer pipe, and the plugging piece is positioned above the liquid inlet of the outer pipe.
2. The reverse circulation positive sand flushing string according to claim 1, wherein: the liquid flow conversion part comprises a cylinder connected to the lower end of the leather cup type packer, the liquid inlet flow channel comprises an eccentric liquid inlet hole eccentrically arranged on the cylinder, the eccentric liquid inlet hole extends up and down, the liquid return flow channel comprises a central blind hole located at the end part of the upper end of the cylinder, and the liquid flow conversion part further comprises a radial perforation communicated with the central blind hole and the outer part of the cylinder, and the radial perforation is arranged along the circumferential interval with the eccentric liquid inlet hole.
3. The reverse circulation positive sand flushing string according to claim 2, wherein: the radial through hole is a long hole extending in the up-down direction.
4. The reverse circulation positive sand flushing string according to claim 3, wherein: the hole opening of the central blind hole is in threaded connection with a sealing pipe, and the lower end of the inner pipe is inserted into the upper end of the sealing pipe in a sealing mode.
5. The reverse circulation positive sand flushing string according to claim 4, wherein: and a sealing ring is arranged outside the lower end of the inner pipe, and the inner pipe is matched with the sealing pipe in a sealing manner through the matching of the sealing ring and the inner wall of the sealing pipe.
6. A reverse circulation positive sand flushing string according to any one of claims 1 to 5, wherein: the plugging piece is a double-pipe joint, the lower end of the double-pipe joint is provided with two screw threads which are arranged at intervals along the radial direction, the screw thread positioned on the inner side is connected with the inner pipe thread, the screw thread positioned on the outer side is connected with the outer pipe thread, so that the inner pipe and the outer pipe are arranged at intervals along the radial direction, and the upper end of the double-pipe joint is also provided with an oil pipe screw thread for connecting an oil pipe.
7. The reverse circulation positive sand flushing string according to claim 6, wherein: the outer tube is including being equipped with the screen pipe of sieve mesh, the sieve mesh constitutes the outer tube inlet.
8. A reverse circulation positive sand flushing string according to any one of claims 1 to 5, wherein: the lower end of the liquid flow conversion part is connected with a pen point, and an internal flow channel of the pen point is communicated with a liquid inlet flow channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921255505.7U CN210918933U (en) | 2019-08-05 | 2019-08-05 | Reverse circulation positive sand washing pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921255505.7U CN210918933U (en) | 2019-08-05 | 2019-08-05 | Reverse circulation positive sand washing pipe column |
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| Publication Number | Publication Date |
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| CN210918933U true CN210918933U (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921255505.7U Active CN210918933U (en) | 2019-08-05 | 2019-08-05 | Reverse circulation positive sand washing pipe column |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941510A (en) * | 2022-06-17 | 2022-08-26 | 程显达 | Circulation unblocking sand fishing process system |
-
2019
- 2019-08-05 CN CN201921255505.7U patent/CN210918933U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941510A (en) * | 2022-06-17 | 2022-08-26 | 程显达 | Circulation unblocking sand fishing process system |
| CN114941510B (en) * | 2022-06-17 | 2024-03-22 | 盘锦博瑞石油工程有限公司 | Circulating blocking-removing sand-fishing process system |
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