CN214170497U - Underground hydraulic control switch for high-pressure oil-water well - Google Patents
Underground hydraulic control switch for high-pressure oil-water well Download PDFInfo
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- CN214170497U CN214170497U CN202022247210.4U CN202022247210U CN214170497U CN 214170497 U CN214170497 U CN 214170497U CN 202022247210 U CN202022247210 U CN 202022247210U CN 214170497 U CN214170497 U CN 214170497U
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Abstract
The utility model discloses a downhole hydraulic control switch of a high-pressure oil-water well, which comprises an eccentric body and a plunger; the eccentric body is provided with two axial channels which are a large-diameter main channel and a small-diameter eccentric channel respectively; the eccentric body is also provided with two radial holes which are an inner hole and an outer hole respectively, wherein the inner hole enables the large-diameter main channel to be communicated with the small-diameter eccentric channel, and the outer hole enables the small-diameter eccentric channel to be communicated with the outside of the eccentric body; the position of the inner hole is higher than the position of the outer hole; the plunger is arranged in the small-diameter eccentric channel, and the plunger and the small-diameter eccentric channel mutually form an axial sliding sealing pair. The utility model discloses a plunger and spiral belleville spring combined mechanism have reduced hydraulic pressure area on a large scale, can bear big pressure differential, have satisfied the demand of high-pressure oil reservoir layering exploitation.
Description
Technical Field
The utility model belongs to the technical field of oil-water well downhole layering control instrument technique and specifically relates to a high pressure oil-water well is hydraulically controlled switch in pit.
Background
The method is characterized in that production is carried out in a mode of full well co-production of all once-jetting production layers in the production process of the oil field as the oil field development of China successively enters the middle and later stages, and the problem that the interlayer contradiction is increasingly prominent due to large permeability difference between oil layers after the oil field development enters the middle and later stages is solved, the interlayer contradiction has large influence on the productivity of the oil well, the production potential of each layer cannot be fully exerted, and the development efficiency of the oil field is greatly influenced. The method for controlling the opening and closing of each production layer by utilizing the underground switch tool is an effective method for improving the production efficiency of the oil well.
Publication (bulletin) No.: CN105003226B, publication (public notice) day: 2017-09-12, which discloses an electro-hydraulic dual-control energy storage type fracturing well completion switch, which comprises an upper joint, a central pipe, a pressure transfer outer cylinder, a sliding sleeve outer cylinder, an outer sheath and a lower joint which are sequentially connected from top to bottom, wherein an energy storage device is arranged on the central pipe, a sliding sleeve system is arranged in the sliding sleeve outer cylinder, hydraulic transmission systems are arranged in the sliding sleeve outer cylinder and the outer sheath, pressure transfer holes communicated with each other are formed in the central pipe, the pressure transfer outer cylinder and the sliding sleeve outer cylinder, and the energy storage device, the sliding sleeve system and the hydraulic transmission systems are communicated through the pressure transfer holes. And a control driving system is also arranged between the lower half part of the sliding sleeve outer cylinder and the outer sheath. The problems that the conventional pitching sliding sleeve staged fracturing is limited in layering stage number due to the existence of the ball seat, the oil well yield is influenced, and later-stage control mining, selective mining and the like are not provided are solved.
Publication (bulletin) No.: CN2761835Y, publication (public notice) day: 2006-03-01 discloses a pipe control hydraulic layer changing switch, which comprises an upper connector, a cylinder sleeve lower connector, a central pipe, a spring, a support ring and a sealing element. The lower end of the upper joint is connected with the cylinder sleeve, the lower end of the cylinder sleeve is connected with the lower joint, the upper end of the central pipe is connected with the pressing ring and arranged between the upper joint and the cylinder sleeve, the lower end of the central pipe is matched with the cylinder sleeve, and a spring is arranged between the central pipe and the cylinder sleeve. The utility model does not need to put in special tools to open the layer changing switch, does not need to record the working state during layer changing, has simple steps and convenient operation, saves time, labor and money; the layer-changing switch has the characteristics of accuracy, reliability, safety, long service life and the like, and is widely applied to the oil well layer-changing oil extraction process. The piston opening pressure of the regulating hydraulic layer changing switch stated in CN2761835Y is greatly influenced by the pressure in the well.
Publication (bulletin) No.: CN202954785U, publication (public notice) day: 2013-05-29, discloses a hydraulic control type bidirectional control switch, which comprises a switch main body consisting of a central tube and an upper joint and a lower joint which are connected with the central tube at two ends of the central tube, wherein an upper piston sleeve and a lower piston sleeve which have a spacing distance are respectively sleeved on the outer portion of the switch main body from top to bottom, an annular piston cavity is formed between the upper piston sleeve and the lower piston sleeve and the central tube, a piston with a side hole is arranged in the piston cavity, and the central tube is also provided with the side hole. The two ends of the piston cavity, namely the upper end of the upper piston sleeve, are provided with closing hydraulic control sleeves, the lower end of the lower piston sleeve is provided with an opening hydraulic control sleeve, and the side hole on the piston is normally positioned in the piston cavity of the lower piston sleeve. The hydraulic control type two-way control switch can realize the oil extraction by changing layers without moving a pipe column, effectively controls the opening or closing of a production oil layer, can adopt the development mode of jetting all oil layer well sections once and performing layered mining, effectively reduces the operation cost of layer changing production, avoids oil layer pollution caused by frequent workover treatment, and provides guarantee for continuous stable production and high-efficiency development of an oil field. The hydraulic control type bidirectional control switch stated in CN202954785U is also susceptible to oil layer pressure to change the flow channel during normal production, resulting in unstable oil production.
In the prior art, the hydraulic control sliding sleeve switch is adopted for underground conventional oil-water well layered injection and production, but the adaptability to high-pressure oil reservoirs is poor, and the application range is limited.
In a word, above technical scheme of the disclosure and the technical problem that will solve and the beneficial effect who produces all with the utility model discloses inequality, perhaps technical field or application are different, are directed against the utility model discloses more technical problem and the beneficial effect that will solve, above all there is not technological inspiration in the technical document of disclosing.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high pressure oil-water well is hydraulically controlled switch in pit to the above-mentioned defect that prior art exists, adopt plunger and spiral belleville spring combined mechanism, reduced hydraulic pressure area on a large scale, can bear big pressure differential, satisfied the demand of high-pressure oil reservoir layering exploitation.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a downhole hydraulic control switch for a high-pressure oil-water well comprises an eccentric body and a plunger;
the eccentric body is provided with two axial channels which are a large-diameter main channel and a small-diameter eccentric channel respectively; the eccentric body is also provided with two radial holes which are an inner hole and an outer hole respectively, wherein the inner hole enables the large-diameter main channel to be communicated with the small-diameter eccentric channel, and the outer hole enables the small-diameter eccentric channel to be communicated with the outside of the eccentric body; the position of the inner hole is higher than the position of the outer hole;
the plunger is arranged in the small-diameter eccentric channel, and the plunger and the small-diameter eccentric channel mutually form an axial sliding sealing pair.
Furthermore, a main ring groove is formed in the outer wall of the plunger, an annular space is formed between the main ring groove and the small-diameter eccentric channel, and the axial length of the main ring groove is equal to the axial distance between the inner hole and the outer hole.
Further, an upper sealing groove and a lower sealing groove are further formed in the outer wall of the plunger, sealing rings are mounted in the upper sealing groove and the lower sealing groove, the upper sealing groove is formed above the main ring groove, and the lower sealing groove is formed below the main ring groove.
Furthermore, the lower end of the plunger is provided with a reducing small-diameter rod, a spiral belleville spring is sleeved on the small-diameter rod, and the upper end of the spiral belleville spring abuts against the lower end face of a reducing ring table at the upper end of the small-diameter rod.
Furthermore, a baffle ring and a plunger sleeve are sleeved on the small-diameter rod;
the upper end of the baffle ring props against the lower end of the spiral butterfly spring, and the lower end of the baffle ring props against the upper end of the plunger sleeve.
The plunger piston further comprises a stop ring, the stop ring is arranged in the eccentric body from a lower port of the eccentric body, the stop ring is only communicated with the large-diameter main channel, the upper end of the stop ring is plugged to the lower end of the small-diameter eccentric channel, and the lower end of the plunger sleeve abuts against the upper end face of the stop ring.
Furthermore, the lower port of the eccentric body is connected with a lower joint, and the upper end surface of the lower joint props against the stop ring.
Furthermore, the eccentric body is further provided with an inclined hydraulic control channel, the inner diameter of the inclined hydraulic control channel is smaller than that of the small-diameter eccentric channel, namely the upper end of the plunger is limited by a lower port of the inclined hydraulic control channel, and an upper port of the inclined hydraulic control channel is provided with a threaded hole for connecting a hydraulic control pipeline.
Compared with the prior art, the utility model following beneficial effect has:
1. the plunger is adopted to transmit power, so that the performance of installing the hydraulic control switch in the deep well is realized;
2. the plunger switch reduces the acting force of the oil reservoir pressure on the switch;
3. the use of the spiral disk spring improves the adaptability of the switch to the well depth and pressure.
Drawings
FIG. 1 is a schematic structural view of a hydraulic control switch under a high pressure oil-water well of the present invention;
FIG. 2 is a schematic view of a plunger structure;
fig. 3 is a partially enlarged view of the stopper ring.
In the figure: the plunger piston comprises an eccentric body 1, a plunger piston 2, a spiral belleville spring 3, a baffle ring 4, a plunger piston sleeve 5, a stop ring 6 and a lower joint 7;
a threaded hole 101, an inner hole 102, an annular space 103 and an outer hole 104;
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 to 3, the present invention provides a technical solution:
a downhole hydraulic control switch for a high-pressure oil-water well comprises an eccentric body 1 and a plunger 2;
the eccentric body is provided with two axial channels which are a large-diameter main channel and a small-diameter eccentric channel respectively; the eccentric body is also provided with two radial holes which are an inner hole and an outer hole respectively, wherein the inner hole enables the large-diameter main channel to be communicated with the small-diameter eccentric channel, and the outer hole enables the small-diameter eccentric channel to be communicated with the outside of the eccentric body; the position of the inner hole is higher than the position of the outer hole;
the plunger 2 is arranged in the small-diameter eccentric channel, and the plunger and the small-diameter eccentric channel mutually form an axial sliding sealing pair.
Further, the plunger outer wall is seted up the master ring groove, and the master ring groove constitutes annular space 103 with minor diameter eccentric passage, the axial length of master ring groove equals the axial distance between hole and the outer hole, when the plunger down, enables hole and outer hole intercommunication.
Further, an upper sealing groove and a lower sealing groove are further formed in the outer wall of the plunger, sealing rings are mounted in the upper sealing groove and the lower sealing groove, the upper sealing groove is formed above the main ring groove, and the lower sealing groove is formed below the main ring groove.
Furthermore, the lower end of the plunger is provided with a reduced small-diameter rod 206, the small-diameter rod is sleeved with a spiral belleville spring 3, and the upper end of the spiral belleville spring abuts against the lower end face of a reduced diameter ring table at the upper end of the small-diameter rod.
Furthermore, a baffle ring 4 and a plunger sleeve 5 are sleeved on the small-diameter rod;
the upper end of the baffle ring props against the lower end of the spiral butterfly spring, and the lower end of the baffle ring props against the upper end of the plunger sleeve.
The plunger piston further comprises a stop ring, the stop ring is arranged in the eccentric body from a lower port of the eccentric body, the stop ring is only communicated with the large-diameter main channel, the upper end of the stop ring is plugged to the lower end of the small-diameter eccentric channel, and the lower end of the plunger sleeve abuts against the upper end face of the stop ring.
Further, the lower port of the eccentric body is connected with a lower joint 7, and the upper end face of the lower joint props against the stop ring 6.
Furthermore, the eccentric body is further provided with an inclined hydraulic control channel, the inner diameter of the inclined hydraulic control channel is smaller than that of the small-diameter eccentric channel, namely the upper end of the plunger is limited by a lower port of the inclined hydraulic control channel, and an upper port of the inclined hydraulic control channel is provided with a threaded hole 101 for connecting a hydraulic control pipeline.
The spiral belleville spring 3 and the baffle ring 4 are sleeved below the plunger 2 to form a moving component which is plugged into an eccentric hole of the eccentric body 1 and then plugged into the plunger sleeve 5. The lower joint 7 is in threaded connection with the eccentric body 1, and the stop ring 6 is clamped between the upper end face of the lower joint 7 and the lower end face of the eccentric body 1.
Referring to fig. 2, the plunger 2 is provided with a narrow diameter groove 203, i.e., a main ring groove, at the center thereof, and forms a fluid annulus 103 with the eccentric hole of the eccentric body 1, communicating the inner hole 102 and the outer hole 104 of the eccentric body 1. The plunger 2 is also provided with sealing grooves 201, 202, 204 and 205, and the mounting sealing combination and the inner cylindrical surface of the eccentric hole of the eccentric body 1 form dynamic sealing.
The lower part of the plunger 2 is provided with a thin-diameter rod 206 which is in clearance fit with the inner diameter of the spiral disk spring 3 and enters the plunger sleeve 5 after being loaded until contacting the stop ring 6.
During site construction, the threaded hole 101 in the eccentric body 1 is used for connecting a hydraulic control pipeline to the ground. And pumping hydraulic oil into the ground hydraulic control pipeline, wherein the hydraulic oil pushes the plunger 2 to move downwards until the end part of the small-diameter rod 206 at the lower end of the plunger 2 contacts the stop ring 6, and at the moment, the inner hole 102 of the eccentric body 1 is communicated with the outer hole 104 through the annular space 103 to form an inner liquid flow channel and an outer liquid flow channel. When the hydraulic control pipeline is decompressed, under the action of the elastic restoring force of the spiral butterfly spring, the plunger 2 moves upwards until the upper end face of the plunger 2 contacts the upper step face of the eccentric body hole, the outer hole 104 and the inner hole 102 of the eccentric body 1 are separated by the sealing combination on the plunger 2, and the liquid flow channel is closed.
Example 2:
referring to fig. 1 to 3, the present invention provides a technical solution:
a downhole hydraulic control switch for a high-pressure oil-water well comprises an eccentric body 1 and a plunger 2;
the eccentric body is provided with two axial channels which are a large-diameter main channel and a small-diameter eccentric channel respectively; the eccentric body is also provided with two radial holes which are an inner hole and an outer hole respectively, wherein the inner hole enables the large-diameter main channel to be communicated with the small-diameter eccentric channel, and the outer hole enables the small-diameter eccentric channel to be communicated with the outside of the eccentric body; the position of the inner hole is higher than the position of the outer hole;
the plunger 2 is arranged in the small-diameter eccentric channel, and the plunger and the small-diameter eccentric channel mutually form an axial sliding sealing pair.
Further, the plunger outer wall is seted up the master ring groove, and the master ring groove constitutes annular space 103 with minor diameter eccentric passage, the axial length of master ring groove equals the axial distance between hole and the outer hole, when the plunger down, enables hole and outer hole intercommunication.
Further, an upper sealing groove and a lower sealing groove are further formed in the outer wall of the plunger, sealing rings are mounted in the upper sealing groove and the lower sealing groove, the upper sealing groove is formed above the main ring groove, and the lower sealing groove is formed below the main ring groove.
Furthermore, the lower end of the plunger is provided with a reduced small-diameter rod 206, the small-diameter rod is sleeved with a spiral belleville spring 3, and the upper end of the spiral belleville spring abuts against the lower end face of a reduced diameter ring table at the upper end of the small-diameter rod.
Example 3:
referring to fig. 1 to 3, the present invention provides a technical solution:
a downhole hydraulic control switch for a high-pressure oil-water well comprises an eccentric body 1 and a plunger 2;
the eccentric body is provided with two axial channels which are a large-diameter main channel and a small-diameter eccentric channel respectively; the eccentric body is also provided with two radial holes which are an inner hole and an outer hole respectively, wherein the inner hole enables the large-diameter main channel to be communicated with the small-diameter eccentric channel, and the outer hole enables the small-diameter eccentric channel to be communicated with the outside of the eccentric body; the position of the inner hole is higher than the position of the outer hole;
the plunger 2 is arranged in the small-diameter eccentric channel, and the plunger and the small-diameter eccentric channel mutually form an axial sliding sealing pair.
Further, the plunger outer wall is seted up the master ring groove, and the master ring groove constitutes annular space 103 with minor diameter eccentric passage, the axial length of master ring groove equals the axial distance between hole and the outer hole, when the plunger down, enables hole and outer hole intercommunication.
Although fig. 1 to 3 are used in all the above embodiments, it is obvious to those skilled in the art that separate drawings are not shown as long as the parts or structural features missing in the embodiments are removed from the drawings. 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 present invention can also be achieved, so all of these modified embodiments are within the 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 (8)
1. A downhole hydraulic control switch of a high-pressure oil-water well is characterized by comprising an eccentric body and a plunger;
the eccentric body is provided with two axial channels which are a large-diameter main channel and a small-diameter eccentric channel respectively; the eccentric body is also provided with two radial holes which are an inner hole and an outer hole respectively, wherein the inner hole enables the large-diameter main channel to be communicated with the small-diameter eccentric channel, and the outer hole enables the small-diameter eccentric channel to be communicated with the outside of the eccentric body; the position of the inner hole is higher than the position of the outer hole;
the plunger is arranged in the small-diameter eccentric channel, and the plunger and the small-diameter eccentric channel mutually form an axial sliding sealing pair.
2. The downhole hydraulic switch of claim 1, wherein the outer wall of the plunger is provided with a main ring groove, the main ring groove and the small-diameter eccentric passage form an annular space, and the axial length of the main ring groove is equal to the axial distance between the inner hole and the outer hole.
3. The downhole hydraulic control switch of a high-pressure oil-water well as claimed in claim 2, wherein the outer wall of the plunger is further provided with an upper sealing groove and a lower sealing groove, sealing rings are mounted in the upper sealing groove and the lower sealing groove, the upper sealing groove is formed above the main ring groove, and the lower sealing groove is formed below the main ring groove.
4. The downhole hydraulic switch of claim 1, 2 or 3, wherein the lower end of the plunger is provided with a reduced diameter rod, the reduced diameter rod is sleeved with a helical belleville spring, and the upper end of the helical belleville spring abuts against the lower end surface of a reduced diameter ring platform at the upper end of the reduced diameter rod.
5. The downhole hydraulic control switch of claim 4, wherein the small-diameter rod is further sleeved with a stop ring and a plunger sleeve;
the upper end of the baffle ring props against the lower end of the spiral butterfly spring, and the lower end of the baffle ring props against the upper end of the plunger sleeve.
6. The downhole hydraulic switch of claim 5, further comprising a stop ring, wherein the stop ring is installed inside the eccentric body from a lower port of the eccentric body, the stop ring is only communicated with the major diameter main channel, an upper end of the stop ring blocks a lower end of the minor diameter eccentric channel, and a lower end of the plunger sleeve abuts against an upper end of the stop ring.
7. The downhole hydraulic switch of claim 6, wherein the lower port of the eccentric body is connected to the lower joint, and the upper end surface of the lower joint abuts against the stop ring.
8. The downhole hydraulic control switch for the high-pressure oil-water well according to claim 1, 2 or 3, wherein the eccentric body is further provided with an inclined hydraulic control channel, the inner diameter of the inclined hydraulic control channel is smaller than that of the small-diameter eccentric channel, namely, the upper end of the plunger is limited by the lower port of the inclined hydraulic control channel, and the upper port of the inclined hydraulic control channel is provided with a threaded hole for connecting a hydraulic control pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022247210.4U CN214170497U (en) | 2020-10-10 | 2020-10-10 | Underground hydraulic control switch for high-pressure oil-water well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022247210.4U CN214170497U (en) | 2020-10-10 | 2020-10-10 | Underground hydraulic control switch for high-pressure oil-water well |
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| Publication Number | Publication Date |
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| CN214170497U true CN214170497U (en) | 2021-09-10 |
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| CN202022247210.4U Active CN214170497U (en) | 2020-10-10 | 2020-10-10 | Underground hydraulic control switch for high-pressure oil-water well |
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