CN212406676U - Sand setting bottom screen plug - Google Patents
Sand setting bottom screen plug Download PDFInfo
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- CN212406676U CN212406676U CN202020884352.9U CN202020884352U CN212406676U CN 212406676 U CN212406676 U CN 212406676U CN 202020884352 U CN202020884352 U CN 202020884352U CN 212406676 U CN212406676 U CN 212406676U
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- 239000004576 sand Substances 0.000 title claims abstract description 68
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 7
- 230000004323 axial length Effects 0.000 claims description 4
- 210000002445 nipple Anatomy 0.000 claims 5
- 238000002347 injection Methods 0.000 abstract description 29
- 239000007924 injection Substances 0.000 abstract description 29
- 230000008901 benefit Effects 0.000 abstract description 9
- 238000011161 development Methods 0.000 abstract description 8
- 239000002332 oil field water Substances 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 30
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 238000005406 washing Methods 0.000 description 9
- 230000018109 developmental process Effects 0.000 description 7
- 238000011010 flushing procedure Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model provides a sieve is stifled at bottom of new-type sand setting, include: the central tube is provided with a central tube radial through hole which is radially communicated; the outer pipe is sleeved outside the central pipe, and an annular space is formed between the outer pipe and the central pipe; the traveling valve is sleeved on the outer circle of the central pipe and axially slides relative to the central pipe, a radial through hole of the traveling valve is formed in the traveling valve, and the radial through hole of the central pipe and the radial through hole of the traveling valve are in a radial communication state; the valve seat is embedded in the inner wall of the outer pipe, an inner conical surface is arranged on the inner wall of the upper port of the valve seat, an outer conical surface is arranged on the outer wall of the lower end of the traveling valve, and the outer conical surface of the lower end of the traveling valve and the inner conical surface of the upper end of the valve seat form a sealing pair. The utility model provides a leakage that various reasons lead to, instrument inefficacy problem, change inner structure, can avoid the inefficacy that foreign matter card, dropout etc. caused, the extension is divided and is annotated tubular column life, improves the benefit of oil field water injection development.
Description
Technical Field
The utility model belongs to the technical field of the oil field separate layer water injection technique and specifically relates to a sieve is stifled at bottom of new-type sand setting.
Background
The sand setting bottom screen plug is an important component tool of a separate-layer water injection pipe column, and the tool has two main functions: firstly, in the water injection process, the effects of sealing the pipe column and opening the water distributor are achieved; secondly, in the well washing process, the circulation of well washing water from the casing to the oil pipe is realized; thirdly, sand and scale in the pipe column fall into a sand setting tail pipe through a sand setting channel.
The tool is widely applied to oil field development, but in the application process, mechanical impurities are filled between the ball and the ball seat to cause leakage, the ball is impacted with the sand blocking cap to cause tripping, the ball and the ball seat are corroded and scaled to cause leakage and other problems, the water injection amount is completely blocked from the bottom screen, layered water injection cannot be realized, and the effective period of a separate injection pipe column in a well is short.
CN 200820016175.1 discloses a compound sand setting check valve used in the petroleum industry, which is suitable for an oil production well of an electric submersible pump. The device comprises an upper joint, a primary sand setting mechanism and a secondary sand setting mechanism, wherein the primary sand setting mechanism and the secondary sand setting mechanism are connected together by a central pipe jacket to form two sand setting cavities, so that the sand setting effect is improved. After the fender sand and the sand setting of two sets of sand setting mechanisms, make and pass through the utility model discloses a sand carrying capacity in the fluid significantly reduces, has reduced the harm of gravel to the electric submersible pump, has improved the life of electric submersible pump, has prolonged the pump operation cycle of examining of electric submersible pump oil recovery well, has improved economic benefits.
The tool is widely applied to oil field development, but mechanical impurity cushion is generated in the application process to cause leakage between the ball and the ball seat, the ball impacts a sand blocking cap to cause tripping, the ball and the ball seat are corroded and scaled to cause leakage and other problems, and the effective period of the separate injection pipe column in a well is short.
The utility model discloses compare total following 2 differences and technical advantage with comparison file CN 200820016175.1: 1. the utility model is suitable for high pressure water injection wells with different well conditions; 2. the principle is different with the function, the utility model discloses realize airtight tubular column, well-flushing, sand setting function. The sand setting bottom screen plug is an important component tool of a separate-layer water injection pipe column, and the tool has two main functions: firstly, in the water injection process, the effects of sealing the pipe column and opening the water distributor are achieved; secondly, in the well washing process, the circulation of well washing water from the casing to the oil pipe is realized; thirdly, sand and scale in the pipe column fall into a sand setting tail pipe through a sand setting channel.
CN 201520917681.8 discloses a sand setting check valve at the bottom of a water injection pipe column, which comprises a sleeve, a check valve set, a runner joint, an angle pipe and a sand setting tail pipe, wherein the check valve set is connected at the bottom of the water injection pipe column, the sand setting in the water injection pipe column on the check valve set sinks into the sand setting tail pipe through a lower crescent channel and an upper crescent channel when falling, the sand setting tail pipe can not be accumulated on the check valve set, the axis of the angle pipe is not coaxial with the axis of the runner joint, the distance between the two axes is 4-19m, the angle pipe is arranged at one side inside the runner joint, the lower crescent channel and the upper crescent channel are concentrated than the runner when the angle pipe is arranged at the middle position, sand is not blocked, the sunk sand can smoothly pass through the sand setting at the lower part, the check valve is ensured not to be buried by sand, a valve ball can be washed away by washing water during well back washing, the utility model can smoothly wash the well, and ensure that the water injection, has obvious economic benefit.
The tool is widely applied to oil field development, but mechanical impurity cushion is generated in the application process to cause leakage between the ball and the ball seat, the ball impacts a sand blocking cap to cause tripping, the ball and the ball seat are corroded and scaled to cause leakage and other problems, and the effective period of the separate injection pipe column in a well is short.
The utility model discloses compare total following 2 differences and technical advantage with comparison file CN 201520917681.8: 1. the theory of operation is different, the utility model discloses work is more reliable. 2. The structure is simpler. The manufacture and processing are simple and convenient, the number of accessories is small, and the service life is long. The sand setting bottom screen plug is an important component tool of a separate-layer water injection pipe column, and the tool has two main functions: firstly, in the water injection process, the effects of sealing the pipe column and opening the water distributor are achieved; secondly, in the well washing process, the circulation of well washing water from the casing to the oil pipe is realized; thirdly, sand and scale in the pipe column fall into a sand setting tail pipe through a sand setting channel.
2016.12, the university of Yangtze river school newspaper (from the department), the improvement research of winning the oil field sand setting bottom screen plug of lump, to the long-term water injection of dividing the injection well lead to the sand setting bottom screen plug inside corrode the scale deposit lose, and the repeated well-flushing lead to the sand setting bottom screen plug inside block up the problem that the well-flushing is unable, found out the main influence factor that leads to the sand setting bottom screen plug to lose efficacy. Aiming at the problems of the sand setting type bottom screen blockage, the bottom screen blockage is improved, firstly, a sand setting channel is changed into ring cutting from 10 holes, and the flow area is increased by 43 percent; secondly, different materials are selected, the corrosion resistance and the price are compared, the improved material is determined to be stainless steel, and the ball seat is changed from an integrated type to a split type; and thirdly, the material of the ball claw is improved, the periphery is strengthened and the sealing performance is enhanced, and the phenomenon that the spring is clamped or the valve ball pad is broken due to the accumulation of settled sand is avoided. The ball claw for supporting the valve ball and the periphery of the spring are fixed by metal rings and sealed by rubber rings, so that the phenomenon that the spring is clamped or the valve ball pad is broken due to accumulation of settled sand is avoided.
The tool is widely applied to oil field development, but mechanical impurity cushion is generated in the application process to cause leakage between the ball and the ball seat, the ball impacts a sand blocking cap to cause tripping, the ball and the ball seat are corroded and scaled to cause leakage and other problems, and the effective period of the separate injection pipe column in a well is short.
The utility model discloses compare total following 2 differences and technical advantage with above-mentioned comparison file: 1. the theory of operation is different, the utility model discloses work is more reliable. 2. The structure is simpler, the internal components are removed, and the sand setting channel is larger. The sand setting bottom screen plug is an important component tool of a separate-layer water injection pipe column, and the tool has two main functions: firstly, in the water injection process, the effects of sealing the pipe column and opening the water distributor are achieved; secondly, in the well washing process, the circulation of well washing water from the casing to the oil pipe is realized; thirdly, sand and scale in the pipe column fall into a sand setting tail pipe through a sand setting channel.
Technical scheme and the technical problem that will solve and the beneficial effect who produces of above disclosure technique all with the utility model discloses inequality, perhaps technical field or application scenario are different, are directed to the utility model discloses more technical problem and the beneficial effect that will solve, above open technical document all do not have the technological inspiration.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned defect that prior art exists, provide a sieve stifled at bottom of new-type sand setting, solved the leakage that various reasons lead to, instrument inefficacy problem, change inner structure, can avoid the inefficacy that foreign matter card, dropout etc. caused, the extension is divided and is annotated tubular column life, improves the benefit of oil field water injection development.
The purpose of the utility model can be realized by the following technical measures:
this new-type sand setting bottom screen plug includes:
the central tube is provided with a central tube radial through hole which is radially communicated;
the outer pipe is sleeved outside the central pipe, and an annular space is formed between the outer pipe and the central pipe;
the traveling valve is sleeved on the outer circle of the central pipe and axially slides relative to the central pipe, a radial through hole of the traveling valve is formed in the traveling valve, and the radial through hole of the central pipe and the radial through hole of the traveling valve are in a radial communication state;
the valve seat is embedded in the inner wall of the outer pipe, an inner conical surface is arranged on the inner wall of the upper port of the valve seat, an outer conical surface is arranged on the outer wall of the lower end of the traveling valve, and the outer conical surface of the lower end of the traveling valve and the inner conical surface of the upper end of the valve seat form a sealing pair.
The purpose of the utility model can be realized by the following technical measures:
furthermore, the O-shaped ring for sealing is arranged on the inner wall of the traveling valve, the inner wall of the traveling valve and the outer wall of the central pipe are in a sealing state, the inner part of the outer pipe is provided with a stepped hole, namely the outer pipe comprises a large-diameter cavity pipe section and a small-diameter cavity pipe section, and the outer diameter of the traveling valve is smaller than the inner diameter of the small-diameter cavity pipe section of the outer pipe.
Furthermore, the upper end of the traveling valve is provided with a top cap, and the outer diameter of the top cap is consistent with the inner diameter of the small-diameter cavity pipe section of the outer pipe.
Further, still include:
and the spring is sleeved on the excircle of the central tube, and the lower end of the spring abuts against the upper end face of the top cap of the traveling valve.
Further, still include:
the stop collar, the stop collar suit is at the center tube excircle, wholly is located the major diameter chamber pipeline section of outer tube, and the stop collar is inside self with the spring protection, and the stop collar external diameter is greater than outer tube minor diameter chamber pipeline section internal diameter, and the stop collar internal diameter is less than outer tube minor diameter chamber pipeline section internal diameter.
Further, the axial distance from the lower end of the limiting sleeve to the upper end of the valve seat is larger than the axial length of the traveling valve.
Furthermore, the upper end of the outer pipe is connected with the upper joint in a threaded manner, the upper end of the central pipe is inserted into the inner hole of the central pipe, the outer diameter of the upper end of the central pipe is consistent with the inner diameter of the inner hole of the upper joint, and the upper end of the spring abuts against the lower end face of the upper joint.
Further, the outer wall of the lower connector is connected with the lower end of the outer pipe in a threaded mode, and the inner hole of the lower connector is connected with the lower end of the central pipe in a threaded mode.
Furthermore, a stepped hole is formed in the lower joint, the upper end of the stepped hole is communicated to the lower end of the traveling valve, a lower joint radial through hole is formed in the lower joint, and the lower joint radial through hole is communicated with the stepped hole in the lower joint.
Furthermore, the valve seat is of an annular structure, the inner diameter of the valve seat is larger than the outer diameter of the central pipe, the upper end face of the valve seat is limited by the limiting table on the inner wall of the outer pipe, and the lower end face of the valve seat is limited by the upper end face of the lower connector.
Compared with the prior art, the utility model following beneficial technological effect has:
when water is injected, the traveling valve and the valve seat are in a sealed state by means of water injection pressure and a spring in the pipe column, and a channel between the annular space of the oil sleeve and the inner cavity of the pipe column is isolated; when the well is reversely washed, the flushing fluid pushes the floating valve to compress the spring through the radial through hole and the annular flow passage so that the floating valve opens the flushing channel upwards, then flows into the annular flow passage, enters the inner hole of the central tube through the radial through hole and flows out of the ground through the tubular column. Above structure and process do not all have the foreign matter to block and lead to technical problem such as leakage or dropout, so the utility model discloses the inefficacy problem that foreign matter card, dropout etc. that can avoid prior art to exist led to the fact changes the structure that the sand setting bottom screen was stifled, eliminates the instrument point of failure, has increased sand setting passage area, and the extension is divided the tubular column life of annotating, improves the benefit of oil field water injection development.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure: 1-upper connector, 2-outer tube, 3-O-shaped ring, 4-limiting sleeve, 5-central tube, 6-spring, 7-floating valve, 8-radial through hole, 9-radial through hole, 10-annular flow channel, 11-O-shaped ring, 12-valve seat, 13-O-shaped ring, 14-annular flow channel, 15-radial through hole, 16-lower connector and 17-O-shaped ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
referring to fig. 1, the present invention includes:
the central tube 5 is provided with a central tube radial through hole which is radially communicated;
the outer pipe 2 is sleeved outside the central pipe, and an annular space is formed between the outer pipe and the central pipe;
the traveling valve 7 is sleeved on the outer circle of the central pipe and axially slides relative to the central pipe, a radial through hole of the traveling valve is formed in the traveling valve, and the radial through hole of the central pipe and the radial through hole of the traveling valve are in a radial communication state;
the valve seat 12 is embedded in the inner wall of the outer pipe, an inner conical surface is arranged on the inner wall of the upper port of the valve seat, an outer conical surface is arranged on the outer wall of the lower end of the traveling valve, and the outer conical surface of the lower end of the traveling valve and the inner conical surface of the upper end of the valve seat form a sealing pair.
Furthermore, the O-shaped ring for sealing is arranged on the inner wall of the traveling valve, the inner wall of the traveling valve and the outer wall of the central pipe are in a sealing state, the inner part of the outer pipe is provided with a stepped hole, namely the outer pipe comprises a large-diameter cavity pipe section and a small-diameter cavity pipe section, and the outer diameter of the traveling valve is smaller than the inner diameter of the small-diameter cavity pipe section of the outer pipe.
Furthermore, the upper end of the traveling valve is provided with a top cap, and the outer diameter of the top cap is consistent with the inner diameter of the small-diameter cavity pipe section of the outer pipe.
Further, still include:
and the spring 6 is sleeved on the outer circle of the central pipe, and the lower end of the spring abuts against the upper end face of the top cap of the traveling valve.
Further, still include:
and the limiting sleeve 4 is sleeved on the outer circle of the central tube, is integrally positioned in the large-diameter cavity tube section of the outer tube, protects the spring inside the limiting sleeve, has an outer diameter larger than the inner diameter of the small-diameter cavity tube section of the outer tube, and has an inner diameter smaller than the inner diameter of the small-diameter cavity tube section of the outer tube.
Further, the axial distance from the lower end of the limiting sleeve to the upper end of the valve seat is larger than the axial length of the traveling valve.
Furthermore, the upper end of the outer pipe is connected with the upper joint 1 in a threaded manner, the upper end of the central pipe is inserted into the inner hole of the central pipe, the outer diameter of the upper end of the central pipe is consistent with the inner diameter of the inner hole of the upper joint, and the upper end of the spring abuts against the lower end face of the upper joint.
Further, the outer wall of the lower joint 16 is connected with the lower end of the outer pipe in a threaded mode, and the inner hole of the lower joint is connected with the lower end of the central pipe in a threaded mode.
Furthermore, a stepped hole is formed in the lower joint, the upper end of the annular flow channel 14 serving as the stepped hole is communicated to the lower end of the traveling valve, a radial through hole of the lower joint is formed in the lower joint, and the radial through hole of the lower joint is communicated with the stepped hole in the lower joint.
Furthermore, the valve seat is of an annular structure, the inner diameter of the valve seat is larger than the outer diameter of the central pipe, the upper end face of the valve seat is limited by the limiting table on the inner wall of the outer pipe, and the lower end face of the valve seat is limited by the upper end face of the lower connector.
The upper end of the upper joint 1 is in threaded connection with the upper end of the outer pipe 2, the lower end of the outer pipe 2 is in threaded connection with the lower joint 16, the upper end of the central pipe 5 is inserted into an inner hole of the upper joint 1, the lower end of the central pipe is in threaded connection with the lower joint 16, the limiting sleeve 4, the spring 6 and the movable valve 7 are respectively sleeved on an excircle on the upper portion of the central pipe 5, the valve seat 12 is embedded in an inner hole in the lower end portion of the outer pipe 2, an outer conical surface at the lower end of the movable valve 7 and an inner conical surface at the upper end of the valve seat 12 form a sealing pair, a group of radial through holes 9 are formed in the middle upper portion of the central pipe 5, a.
The working principle is that the traveling valve 7 and the valve seat 12 are in a sealing state by means of water injection pressure in the pipe column and the spring 6 during water injection, and a channel between the oil sleeve annulus and the pipe column inner cavity is isolated; when the well is reversely washed, the flushing fluid pushes the traveling valve 7 to compress the spring 6 through the radial through hole 15 and the annular flow passage 14 so as to open the flushing channel upwards, then flows into the annular channel 10, enters the inner hole of the central tube 5 through the radial through holes 8 and 9 and flows out of the ground through the tubular column. Above structure and process do not all have the foreign matter to block and lead to technical problem such as leakage or dropout, so the utility model discloses the inefficacy problem that foreign matter card, dropout etc. that can avoid prior art to exist led to the fact changes the structure that the sand setting bottom screen was stifled, eliminates the instrument point of failure, has increased sand setting passage area, and the extension is divided the tubular column life of annotating, improves the benefit of oil field water injection development.
Example 2:
referring to fig. 1, the new sand setting bottom screen includes:
the central tube 5 is provided with a central tube radial through hole which is radially communicated;
the outer pipe 2 is sleeved outside the central pipe, and an annular space is formed between the outer pipe and the central pipe;
the traveling valve 7 is sleeved on the outer circle of the central pipe and axially slides relative to the central pipe, a radial through hole of the traveling valve is formed in the traveling valve, and the radial through hole of the central pipe and the radial through hole of the traveling valve are in a radial communication state;
the valve seat 12 is embedded in the inner wall of the outer pipe, an inner conical surface is arranged on the inner wall of the upper port of the valve seat, an outer conical surface is arranged on the outer wall of the lower end of the traveling valve, and the outer conical surface of the lower end of the traveling valve and the inner conical surface of the upper end of the valve seat form a sealing pair.
Furthermore, the O-shaped ring for sealing is arranged on the inner wall of the traveling valve, the inner wall of the traveling valve and the outer wall of the central pipe are in a sealing state, the inner part of the outer pipe is provided with a stepped hole, namely the outer pipe comprises a large-diameter cavity pipe section and a small-diameter cavity pipe section, and the outer diameter of the traveling valve is smaller than the inner diameter of the small-diameter cavity pipe section of the outer pipe.
Furthermore, the upper end of the traveling valve is provided with a top cap, and the outer diameter of the top cap is consistent with the inner diameter of the small-diameter cavity pipe section of the outer pipe. Prevent that impurity from getting into the stop collar inside of travelling valve top.
Further, still include:
and the spring 6 is sleeved on the outer circle of the central pipe, and the lower end of the spring abuts against the upper end face of the top cap of the traveling valve.
Further, still include:
and the limiting sleeve 4 is sleeved on the outer circle of the central tube, is integrally positioned in the large-diameter cavity tube section of the outer tube, protects the spring inside the limiting sleeve, has an outer diameter larger than the inner diameter of the small-diameter cavity tube section of the outer tube, and has an inner diameter smaller than the inner diameter of the small-diameter cavity tube section of the outer tube.
Further, the axial distance from the lower end of the limiting sleeve to the upper end of the valve seat is larger than the axial length of the traveling valve.
Furthermore, the upper end of the outer pipe is connected with the upper joint 1 in a threaded manner, the upper end of the central pipe is inserted into the inner hole of the central pipe, the outer diameter of the upper end of the central pipe is consistent with the inner diameter of the inner hole of the upper joint, and the upper end of the spring abuts against the lower end face of the upper joint.
Example 3:
referring to fig. 1, the present invention provides a new sand setting bottom screen plug, which includes:
the central tube 5 is provided with a central tube radial through hole which is radially communicated;
the outer pipe 2 is sleeved outside the central pipe, and an annular space is formed between the outer pipe and the central pipe;
the traveling valve 7 is sleeved on the outer circle of the central pipe and axially slides relative to the central pipe, a radial through hole of the traveling valve is formed in the traveling valve, and the radial through hole of the central pipe and the radial through hole of the traveling valve are in a radial communication state;
the valve seat 12 is embedded in the inner wall of the outer pipe, an inner conical surface is arranged on the inner wall of the upper port of the valve seat, an outer conical surface is arranged on the outer wall of the lower end of the traveling valve, and the outer conical surface of the lower end of the traveling valve and the inner conical surface of the upper end of the valve seat form a sealing pair.
Furthermore, the O-shaped ring for sealing is arranged on the inner wall of the traveling valve, the inner wall of the traveling valve and the outer wall of the central pipe are in a sealing state, the inner part of the outer pipe is provided with a stepped hole, namely the outer pipe comprises a large-diameter cavity pipe section and a small-diameter cavity pipe section, and the outer diameter of the traveling valve is smaller than the inner diameter of the small-diameter cavity pipe section of the outer pipe.
Example 4:
referring to fig. 1, the present invention provides a new sand setting bottom screen plug, which includes:
the central tube 5 is provided with a central tube radial through hole which is radially communicated;
the outer pipe 2 is sleeved outside the central pipe, and an annular space is formed between the outer pipe and the central pipe;
the traveling valve 7 is sleeved on the outer circle of the central pipe and axially slides relative to the central pipe, a radial through hole of the traveling valve is formed in the traveling valve, and the radial through hole of the central pipe and the radial through hole of the traveling valve are in a radial communication state;
the valve seat 12 is embedded in the inner wall of the outer pipe, an inner conical surface is arranged on the inner wall of the upper port of the valve seat, an outer conical surface is arranged on the outer wall of the lower end of the traveling valve, and the outer conical surface of the lower end of the traveling valve and the inner conical surface of the upper end of the valve seat form a sealing pair.
Although fig. 1 is used for all the above embodiments, it is obvious to those skilled in the art that a separate drawing is not shown as long as the parts or structural features missing in the embodiments are removed from the drawing. As will be clear to the skilled person. Of course, the embodiments with more components are only the preferred embodiments, and the embodiments with fewer components are the basic embodiments, but the basic objects of the invention can also be achieved, so all of them are within the protection scope of the present invention.
All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.
In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. New-type sand setting end screen is stifled, its characterized in that includes:
the central tube is provided with a central tube radial through hole which is radially communicated;
the outer pipe is sleeved outside the central pipe, and an annular space is formed between the outer pipe and the central pipe;
the traveling valve is sleeved on the outer circle of the central pipe and axially slides relative to the central pipe, a radial through hole of the traveling valve is formed in the traveling valve, and the radial through hole of the central pipe and the radial through hole of the traveling valve are in a radial communication state;
the valve seat is embedded in the inner wall of the outer pipe, an inner conical surface is arranged on the inner wall of the upper port of the valve seat, an outer conical surface is arranged on the outer wall of the lower end of the traveling valve, and the outer conical surface of the lower end of the traveling valve and the inner conical surface of the upper end of the valve seat form a sealing pair.
2. The new-type sand-settling bottom screen plug as claimed in claim 1, wherein the inner wall of the traveling valve is provided with an O-shaped ring for sealing, the inner wall of the traveling valve is in a sealing state with the outer wall of the central pipe, the inner part of the outer pipe is provided with a stepped hole, namely the stepped hole comprises a large-diameter cavity pipe section and a small-diameter cavity pipe section, and the outer diameter of the traveling valve is smaller than the inner diameter of the small-diameter cavity pipe section of the outer pipe.
3. The new-type sand-settling bottom screen plug as claimed in claim 2, wherein the traveling valve has a top cap at its upper end, and the outer diameter of the top cap is identical to the inner diameter of the small-diameter cavity pipe section of the outer pipe.
4. The new sand screen plug of claim 3 further comprising:
and the spring is sleeved on the excircle of the central tube, and the lower end of the spring abuts against the upper end face of the top cap of the traveling valve.
5. The new sand screen plug of claim 4 further comprising:
the stop collar, the stop collar suit is at the center tube excircle, wholly is located the major diameter chamber pipeline section of outer tube, and the stop collar is inside self with the spring protection, and the stop collar external diameter is greater than outer tube minor diameter chamber pipeline section internal diameter, and the stop collar internal diameter is less than outer tube minor diameter chamber pipeline section internal diameter.
6. The new sand screen plug according to claim 5, wherein the axial distance from the lower end of the stop collar to the upper end of the valve seat is greater than the axial length of the traveling valve.
7. The new-type sand-settling bottom screen plug as claimed in claim 4, 5 or 6, characterized in that the upper end of the outer pipe is screwed with the upper joint, the upper end of the central pipe is inserted into the inner hole of the central pipe, the outer diameter of the upper end of the central pipe is consistent with the inner diameter of the inner hole of the upper joint, and the upper end of the spring is pressed against the lower end surface of the upper joint.
8. The new sand screen plug according to claim 4, 5 or 6, wherein the lower end of the outer pipe is screwed with the outer wall of the lower joint, and the lower end of the central pipe is screwed with the inner hole of the lower joint.
9. The new screen plug according to claim 8, characterized in that said lower nipple has a step hole formed therein, the upper end of said step hole communicating with the lower end of said traveling valve, said lower nipple having a lower nipple radial through hole, said lower nipple radial through hole communicating with the step hole formed in the lower nipple interior.
10. The new-type sand-settling bottom screen plug as claimed in claim 9, wherein the valve seat is of an annular structure, the inner diameter of the valve seat is larger than the outer diameter of the central pipe, the upper end surface of the valve seat is limited by the limiting table on the inner wall of the outer pipe, and the lower end surface of the valve seat is limited by the upper end surface of the lower connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020884352.9U CN212406676U (en) | 2020-05-22 | 2020-05-22 | Sand setting bottom screen plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020884352.9U CN212406676U (en) | 2020-05-22 | 2020-05-22 | Sand setting bottom screen plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212406676U true CN212406676U (en) | 2021-01-26 |
Family
ID=74404074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020884352.9U Withdrawn - After Issue CN212406676U (en) | 2020-05-22 | 2020-05-22 | Sand setting bottom screen plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212406676U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700454A (en) * | 2020-05-22 | 2021-11-26 | 中国石油化工股份有限公司 | New-type sand setting bottom screen is stifled |
-
2020
- 2020-05-22 CN CN202020884352.9U patent/CN212406676U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700454A (en) * | 2020-05-22 | 2021-11-26 | 中国石油化工股份有限公司 | New-type sand setting bottom screen is stifled |
| CN113700454B (en) * | 2020-05-22 | 2024-07-02 | 中国石油化工股份有限公司 | Novel sand setting bottom screen plug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20210126 Effective date of abandoning: 20240702 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210126 Effective date of abandoning: 20240702 |