CN210195721U - Reverse filling tool - Google Patents
Reverse filling tool Download PDFInfo
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- CN210195721U CN210195721U CN202020203062.3U CN202020203062U CN210195721U CN 210195721 U CN210195721 U CN 210195721U CN 202020203062 U CN202020203062 U CN 202020203062U CN 210195721 U CN210195721 U CN 210195721U
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Abstract
The utility model discloses a reverse filling tool, which comprises a well reserving part and a service tool part arranged in the well reserving part; and the well remaining part enters the well along with the pipe column before well cementation, and after sand control construction is performed after well cementation is finished, the service tool is put into the well to open the well remaining part and establish a circulating channel for filling. The utility model is developed for meeting the sand prevention requirement of the horizontal well of the thick oil, high argillaceous, fine sand loose sandstone reservoir, the utility model can realize the reverse flow of the mortar from bottom to top in the air of the screen/lantern ring, and no sand setting can form a sand bridge; the technical problem of fracturing the reservoir stratum by self-selection of thin interlayer and multiple layers with serious interlayer and intraformational heterogeneity and the sequence of pressing force from low to high is thoroughly solved. The utility model discloses enable the gravel layer of reservoir stratum and intraductal annular space and compress tightly closely knit, the sand control is effectual longe-lived, can reduce gravel packing sand control operating cost, improves and fills the quality.
Description
Technical Field
The utility model belongs to the technical field of oil gas well sand control technique and specifically relates to a reverse instrument of filling.
Background
At present, each main oil field in China enters the middle and later stages of development, the difficulty of taking over reserve mining is increasingly high, various requirements are provided for matched products of different oil reservoir types, a reverse filling tool is adopted by part of oil wells, the problems that a filling channel cannot be successfully opened by a service tool during sand prevention construction, the filling channel cannot be successfully closed after filling is completed and the like occur, not only is the operation cost and the well occupying period greatly prolonged, but also part of downhole tools are scrapped, and the measure cost is greatly increased.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an aim at is exactly to the defect that prior art exists, provides a reverse filling tool, and the service tool can't successfully be opened and fill the passageway when solving the sand control construction, can't successfully close the problem of filling the passageway after filling the completion.
In order to achieve the above object, the present invention mainly provides the following technical solutions:
a reverse-pack tool comprising a well intervention section and a service tool section, wherein:
the well reserving part comprises an upper connector and a sealing body, the lower end of the upper connector is connected with the upper part of the sealing body, the lower part of the sealing body is sequentially provided with a valve sleeve, a connecting sleeve, a filling cylinder, a spring cylinder, a short section and a guide shoe, the inner wall below the valve sleeve is provided with a valve seat, and the valve seat is rotatably connected with a valve for closing a central hole of the valve seat; a flow guide sleeve is arranged at the filling hole on the outer wall of the filling cylinder, a sliding sleeve for closing the filling hole is arranged in the filling cylinder, and the sliding sleeve is arranged in the filling cylinder in a sliding manner; a spring is arranged in the spring barrel, the lower end of the spring is connected with the inner wall of the spring barrel, and the upper end of the spring is connected with the sliding sleeve;
the service tool part comprises a sealing plug and a positioning barrel, a pushing conical surface which is inclined and used for pushing the sliding sleeve to move downwards is arranged on the outer wall of the lower end of the sealing plug, the diameter of the upper portion, located on the pushing conical surface, of the sealing plug is in sealing fit with the inner wall of the sealing body, and the diameter, located on the lower portion of the pushing conical surface, of the sealing plug is matched with the inner diameter of the sliding sleeve.
Preferably, the fixed round pin axle that is equipped with on the disk seat, a pot head of valve is established at the round pin epaxially, it is equipped with the torsional spring still to overlap on the round pin axle, the one end and the disk seat of torsional spring are connected, the other end and the valve connection of torsional spring.
Preferably, the sealing body comprises a sealing barrel, a sealing gasket ring, a sealing packing, a concave sealing gasket ring and a convex sealing gasket ring, wherein the sealing gasket ring, the sealing packing, the concave sealing gasket ring and the convex sealing gasket ring are arranged inside the sealing barrel, and a gland is connected to the inner wall below the sealing barrel through threads.
Preferably, the sealing packing at the matching position of the sealing body and the sealing plug is four groups of sealing packing, wherein two groups of sealing packing are downward in opening, and the other two groups of sealing packing are upward in opening.
Preferably, the positioning cylinder connected to the sealing plug is an elastic positioning piece.
Preferably, the sealing plug comprises an upper plug and a lower plug, the diameter of the upper plug is larger than that of the lower plug, the pushing conical surface is arranged at the joint of the upper plug and the lower plug, and the positioning sleeve is sleeved on the outer surface of the lower plug.
Preferably, the inner surface of the upper end of the sliding sleeve is provided with a conical surface matched with the pushing conical surface.
Preferably, the fit clearance at the fit position of the sealing plug and the sliding sleeve is 0.15-0.35 mm.
Compared with the prior art, the utility model discloses at least, following advantage has:
(1) the filling channel is large, a sand bridge is not easy to form, the filling effect is good, and the filling sand prevention method is suitable for filling sand prevention of a long-well-section horizontal well;
(2) when the service tool is put down, the effect of micro-leakage and leakage flow is achieved, and the butt joint with the well reserving part can be ensured to be more direct and effective;
(3) the pipe column is lifted, and the channel is closed under the action of the positioning barrel and the spring, so that double safety is realized, and the closing is reliable.
Drawings
FIG. 1 is a schematic structural view of the upper half of the filling channel of the present invention;
FIG. 2 is a schematic structural view of the lower half part of the open filling channel of the present invention;
FIG. 3 is a schematic structural view of the upper half of the closed channel of the present invention;
FIG. 4 is a schematic structural view of the lower half of the closed passage of the present invention;
fig. 5 is a schematic structural view of the valve of the present invention;
fig. 6 is a schematic structural view of the sealing cylinder of the present invention;
in the figure: 1. the sealing device comprises an upper joint, 2 sealing plugs, 3 filling holes, 4 sealing cylinders, 5 sealing cushion rings, 6 sealing packing, 7 convex sealing cushion rings, 8 concave sealing cushion rings, 9 gland covers, 11 valve sleeves, 12 pushing conical surfaces, 13 valve seats, 14 valves, 15 connecting sleeves, 16 screws, 17 pin shafts, 18 torsion springs, 19 upper plugs, 20 diversion sleeves, 21 filling cylinders, 22 lower plugs, 23 sliding sleeves, 25 spring cylinders, 26 positioning cylinders, 27 springs, 28 short sections and 29 guide shoes.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of a reverse filling tool according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Example 1
As shown in fig. 1-6, a reverse-fill tool includes a well intervention section and a service tool section. Wherein:
the well reserving part comprises an upper connector 1, a sealing body, a valve sleeve 11, a valve seat 13, a valve 14, a connecting sleeve 15, a screw 16, a pin shaft 17, a torsion spring 18, a flow guide sleeve 20, a filling cylinder 21, a sliding sleeve 23, a spring cylinder 25, a spring 27, a short section 28 and a guide shoe 29.
The upper joint 1, the sealing body, the valve sleeve 11, the connecting sleeve 15, the filling cylinder 21, the spring cylinder 25, the short section 28 and the guide shoe 29 are sequentially connected together in a threaded manner from top to bottom and are in sealing connection with one another. The sealing body comprises a sealing barrel 4, a sealing gasket ring 5, a sealing packing 6, a convex sealing gasket ring 7 and a concave sealing gasket ring 8. Wherein, sealed packing 6 is four groups, and during concrete installation, concave seal backing ring 8, sealed packing 6, seal backing ring 5, sealed packing 6, protruding seal backing ring 7, sealed packing 6, seal backing ring 5, sealed packing 6, concave seal backing ring 8 put into in proper order sealed section of thick bamboo 4 according to this order to with gland 9 threaded connection on the 4 inner walls of sealed section of thick bamboo.
The gland 9 is connected to the lower part of the inside of the sealing cylinder 4 and is used for fixing the sealing gasket ring 5, the sealing packing 6, the convex sealing gasket ring 7 and the concave sealing gasket ring 8; the sealing body and the sealing plug 2 are matched, four groups of sealing packing 6 are adopted, and sealing is realized in a combined mode that two groups of openings are downward and two groups of openings are upward. The valve seat 13 is fixedly provided with a pin shaft 17, one end of the valve 14 is sleeved on the pin shaft 17, the pin shaft 17 is further sleeved with a torsion spring 18, one end of the torsion spring 18 is connected with the valve seat 13, and the other end of the torsion spring 18 is connected with the valve 14.
When the valve seat is installed, the torsion spring 18 sleeved outside the pin shaft 17 is installed on the valve seat 13, then the two ends of the pin shaft are fixed with the screws 16, and finally the valve seat 13 is connected to the lower part inside the valve sleeve 11; since the valve 14 is also mounted on the pin 17, the valve 14 can rotate around the pin 17 under the tension of the torsion spring 18, and the central hole of the valve seat 13 is automatically closed. When the valve is used specifically, the valve 14 connected in the valve housing 11 is pushed away by the sealing plug 2 during sand control construction, after sand control is completed, the sealing plug 2 is lifted out, and the valve 14 is closed under the action of the torsion spring 18.
The outer wall of the filling cylinder 21 is provided with a flow guide sleeve 20 at the filling hole 3, the flow guide sleeve 20 just covers the position of the filling hole 3, a sliding sleeve 23 for closing the filling hole 3 is arranged in the filling cylinder 21, and the filling cylinder 21 is in sliding fit with the sliding sleeve 23. A spring 27 is arranged in the spring cylinder 25, the lower end of the spring 27 is connected with the inner wall of the spring cylinder 25, and the upper end of the spring 27 is connected with the sliding sleeve 23, so that the spring 27 needs to be compressed when the sliding sleeve 23 is pressed to enable the sliding sleeve 23 to move downwards, and the filling hole 3 can be exposed after the elastic force of the spring 27 is overcome; when the pressure is removed, the sliding sleeve 23 is moved upwards by the spring 27, closing the filling hole 3.
Still be connected with nipple joint 28 between spring case 25 and guide shoe 29, because this technology is generally with instrument well income well long time later carry out sand control construction again, this nipple joint 28 that makes the connection can play foreign matter such as the interior silt of storage tubular column to avoid the silt to influence the instrument action process.
The above-mentioned service tool part comprises a sealing plug 2 and a positioning cylinder 26; the positioning cylinder 26 is slidably mounted on the sealing plug 2, the sealing plug 2 is slidably matched with the sealing body, the sealing gasket ring 5, the sealing packing 6, the convex sealing gasket ring 7, the concave sealing gasket ring 8, the gland 9 and the sliding sleeve 23, and is positioned in the filling cylinder 21 when in use; the outer wall of the lower end of the sealing plug 2 is provided with an inclined pushing conical surface 12 used for pushing the sliding sleeve 23 to move downwards, the diameter of the upper portion, located on the pushing conical surface 12, of the sealing plug 2 is in sealing fit with the inner wall of the sealing body, and the diameter, located on the lower portion of the pushing conical surface 12, of the sealing plug 2 is matched with the inner diameter of the sliding sleeve 23.
The positioning cylinder 26 is an elastic positioning element, and when the sand control is completed and the sand control is lifted upwards, the sliding sleeve 23 moves upwards under the dual functions of the spring 27 and the positioning cylinder 26 and is sealed to the position of the filling hole of the filling cylinder 21.
The fit clearance of the sealing plug 2 and the sliding sleeve 23 is 0.15-0.35mm, a micro-leakage structure is formed, the sealing plug 2 can be ensured to be smoothly put in place when being put down, and the butt joint with the well reserving part can be ensured to be more direct and effective.
Example 2
The other steps are substantially the same as those of embodiment 1, except that the sealing plug 2 comprises an upper plug 19 and a lower plug 22 which are connected in sequence, the diameter of the upper plug 19 is larger than that of the lower plug 22, the pushing conical surface 12 is arranged at the joint of the upper plug 19 and the lower plug 22, and the positioning cylinder 26 is sleeved on the outer surface of the lower plug 22. And the inner surface of the upper end of the sliding sleeve 23 is provided with a conical surface matched with the pushing conical surface 12. Thus, when the sealing plug 2 is forced to move downwards, the lower plug 22 opens the valve 14 and continues to move downwards into the filling cylinder 21, and the pushing conical surface 12 can be in contact fit with the conical surface at the upper end of the sliding sleeve 23, so that the sliding sleeve 23 is driven to move downwards to open the filling hole 3.
When the anti-sand device is used specifically, the well-remaining part is assembled and then connected to the tail end of the anti-sand pipe column and is used along with other anti-sand tools in a well.
When sand control construction is needed, the service tool is put down and is quickly put in place, the pump truck is started, the service tool needs to be flushed down while being discharged with small displacement, pressure change is observed, when the pressure rises, the service tool enters the sealing body, the service tool is continuously and slowly put down at the moment, the valve 14 is opened by the sealing plug 2 and continuously goes down, when the pressure suddenly drops to 0, the service tool is put in place, and at the moment, the sliding sleeve 23 is pushed down to expose the filling hole 3 of the filling cylinder 21, so that a sealed sand control channel is established. At this time, the pump is started to add sand (extrusion and circulation) for reverse filling, when the filling pressure reaches a fixed value, the sand control pipe column is lifted up for 2 meters, and at this time, the sliding sleeve 23 is automatically closed under the action of the spring 27 and the positioning barrel 26. And then, quickly backwashing the well, washing the sand liquid in the sand control pipe column out of the ground until no sand is seen at an outlet, and lifting the sand control pipe column out of the ground.
By adopting the device and the method, the sand prevention requirement of the horizontal well of the thickened oil, high-mud and fine sand loose sandstone reservoir can be met, the utility model can realize that the mortar reversely flows from bottom to top in the air of the screen/lantern ring, and no settled sand can form a sand bridge; the technical problem of fracturing the reservoir stratum by self-selection of thin interlayer and multiple layers with serious interlayer and intraformational heterogeneity and the sequence of pressing force from low to high is thoroughly solved. The utility model discloses enable the gravel layer of reservoir stratum and intraductal annular space and compress tightly closely knit, the sand control is effectual longe-lived, can reduce gravel packing sand control operating cost, improves and fills the quality.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A reverse-pack tool comprising a well intervention section and a service tool section, wherein:
the well reserving part comprises an upper connector and a sealing body, the lower end of the upper connector is connected with the upper part of the sealing body, the lower part of the sealing body is sequentially provided with a valve sleeve, a connecting sleeve, a filling cylinder, a spring cylinder, a short section and a guide shoe, the inner wall below the valve sleeve is provided with a valve seat, and the valve seat is rotatably connected with a valve for closing a central hole of the valve seat; a flow guide sleeve is arranged at the filling hole on the outer wall of the filling cylinder, a sliding sleeve for closing the filling hole is arranged in the filling cylinder, and the sliding sleeve is arranged in the filling cylinder in a sliding manner; a spring is arranged in the spring barrel, the lower end of the spring is connected with the inner wall of the spring barrel, and the upper end of the spring is connected with the sliding sleeve;
the service tool part comprises a sealing plug and a positioning barrel, a pushing conical surface which is inclined and used for pushing the sliding sleeve to move downwards is arranged on the outer wall of the lower end of the sealing plug, the diameter of the upper portion, located on the pushing conical surface, of the sealing plug is in sealing fit with the inner wall of the sealing body, and the diameter, located on the lower portion of the pushing conical surface, of the sealing plug is matched with the inner diameter of the sliding sleeve.
2. A reverse filling tool according to claim 1, wherein the valve seat is fixedly provided with a pin, a end of the valve is sleeved on the pin, the pin is further sleeved with a torsion spring, one end of the torsion spring is connected with the valve seat, and the other end of the torsion spring is connected with the valve.
3. The reverse filling tool according to claim 1, wherein the sealing body comprises a sealing barrel, a sealing gasket ring, a sealing packing, a concave sealing gasket ring and a convex sealing gasket ring which are arranged inside the sealing barrel, and a gland is connected to the lower inner wall of the sealing barrel in a threaded manner.
4. The reverse filling tool according to claim 3, wherein the sealing packing at the position where the sealing body is engaged with the sealing plug is four sets of sealing packing, two sets of sealing packing are opened downwards, and the other two sets of sealing packing are opened upwards.
5. A reverse filling tool according to claim 1, wherein the positioning sleeve attached to the sealing plug is a resilient positioning element.
6. A reverse filling tool according to claim 4, wherein the sealing plug comprises an upper plug and a lower plug, the upper plug has a larger diameter than the lower plug, the pushing taper is provided at the junction of the upper plug and the lower plug, and the positioning sleeve is sleeved on the outer surface of the lower plug.
7. A reverse filling tool according to claim 5, wherein the inner surface of the upper end of the sliding sleeve is provided with a taper adapted to the pushing taper.
8. A reverse filling tool according to claim 6, wherein the fitting clearance at the fitting position of the sealing plug and the sliding sleeve is 0.15-0.35 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020203062.3U CN210195721U (en) | 2020-02-25 | 2020-02-25 | Reverse filling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020203062.3U CN210195721U (en) | 2020-02-25 | 2020-02-25 | Reverse filling tool |
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| Publication Number | Publication Date |
|---|---|
| CN210195721U true CN210195721U (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020203062.3U Active CN210195721U (en) | 2020-02-25 | 2020-02-25 | Reverse filling tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117468888A (en) * | 2023-12-27 | 2024-01-30 | 中国石油集团川庆钻探工程有限公司 | Underground airtight plugging tool and plugging method |
-
2020
- 2020-02-25 CN CN202020203062.3U patent/CN210195721U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117468888A (en) * | 2023-12-27 | 2024-01-30 | 中国石油集团川庆钻探工程有限公司 | Underground airtight plugging tool and plugging method |
| CN117468888B (en) * | 2023-12-27 | 2024-03-19 | 中国石油集团川庆钻探工程有限公司 | Underground airtight plugging tool and plugging method |
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